Merge tag 'turbostat-2024.04.10' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux

Pull turbostat updates from Len Brown: - Use of the CPU MSR driver is now optional - Perf is now preferred for many counters - Non-root users can now execute turbostat, though with limited functionality - Add counters for some new GFX hardware - Minor fixes * tag 'turbostat-2024.04.10' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: (26 commits) tools/power turbostat: v2024.04.10 tools/power/turbostat: Add support for Xe sysfs knobs tools/power/turbostat: Add support for new i915 sysfs knobs tools/power/turbostat: Introduce BIC_SAM_mc6/BIC_SAMMHz/BIC_SAMACTMHz tools/power/turbostat: Fix uncore frequency file string tools/power/turbostat: Unify graphics sysfs snapshots tools/power/turbostat: Cache graphics sysfs path tools/power/turbostat: Enable MSR_CORE_C1_RES support for ICX tools/power turbostat: Add selftests tools/power turbostat: read RAPL counters via perf tools/power turbostat: Add proper re-initialization for perf file descriptors tools/power turbostat: Clear added counters when in no-msr mode tools/power turbostat: add early exits for permission checks tools/power turbostat: detect and disable unavailable BICs at runtime tools/power turbostat: Add reading aperf and mperf via perf API tools/power turbostat: Add --no-perf option tools/power turbostat: Add --no-msr option tools/power turbostat: enhance -D (debug counter dump) output tools/power turbostat: Fix warning upon failed /dev/cpu_dma_latency read tools/power turbostat: Read base_hz and bclk from CPUID.16H if available ...
author: Linus Torvalds <torvalds@linux-foundation.org> 2024-04-10 13:13:27 -0700
committer: Linus Torvalds <torvalds@linux-foundation.org> 2024-04-10 13:13:27 -0700
commit: a6189a7407795b3f5167ea532ac85931cd26083a (patch)
tree: 6796352b31b839505a5c1420fa4205e1af332fba /tools
parent: 3679d9d1509ab7766f288cf4f70bea3f4c5cf193 (diff)
parent: 3ab7296a7e6aa34634dcc2926af933107a117996 (diff)
3 files changed, 1726 insertions, 369 deletions
diff --git a/tools/power/x86/turbostat/turbostat.8 b/tools/power/x86/turbostat/turbostat.8
index 8f08c3fd498d..0d3672e5d9ed 100644
--- a/tools/power/x86/turbostat/turbostat.8
+++ b/tools/power/x86/turbostat/turbostat.8
@@ -67,6 +67,10 @@ The column name "all" can be used to enable all disabled-by-default built-in cou
 .PP
 \fB--quiet\fP Do not decode and print the system configuration header information.
 .PP
++\fB--no-msr\fP Disable all the uses of the MSR driver.
++.PP
++\fB--no-perf\fP Disable all the uses of the perf API.
++.PP
 \fB--interval seconds\fP overrides the default 5.0 second measurement interval.
 .PP
 \fB--num_iterations num\fP number of the measurement iterations.
@@ -125,9 +129,17 @@ The system configuration dump (if --quiet is not used) is followed by statistics
 .PP
 \fBPkgTmp\fP Degrees Celsius reported by the per-package Package Thermal Monitor.
 .PP
-\fBGFX%rc6\fP The percentage of time the GPU is in the "render C6" state, rc6, during the measurement interval. From /sys/class/drm/card0/power/rc6_residency_ms.
+\fBGFX%rc6\fP The percentage of time the GPU is in the "render C6" state, rc6, during the measurement interval. From /sys/class/drm/card0/power/rc6_residency_ms or /sys/class/drm/card0/gt/gt0/rc6_residency_ms or /sys/class/drm/card0/device/tile0/gtN/gtidle/idle_residency_ms depending on the graphics driver being used.
 .PP
-\fBGFXMHz\fP Instantaneous snapshot of what sysfs presents at the end of the measurement interval. From /sys/class/graphics/fb0/device/drm/card0/gt_cur_freq_mhz.
+\fBGFXMHz\fP Instantaneous snapshot of what sysfs presents at the end of the measurement interval. From /sys/class/graphics/fb0/device/drm/card0/gt_cur_freq_mhz or /sys/class/drm/card0/gt_cur_freq_mhz or /sys/class/drm/card0/gt/gt0/rps_cur_freq_mhz or /sys/class/drm/card0/device/tile0/gtN/freq0/cur_freq depending on the graphics driver being used.
+.PP
+\fBGFXAMHz\fP Instantaneous snapshot of what sysfs presents at the end of the measurement interval. From /sys/class/graphics/fb0/device/drm/card0/gt_act_freq_mhz or /sys/class/drm/card0/gt_act_freq_mhz or /sys/class/drm/card0/gt/gt0/rps_act_freq_mhz or /sys/class/drm/card0/device/tile0/gtN/freq0/act_freq depending on the graphics driver being used.
+.PP
+\fBSAM%mc6\fP The percentage of time the SA Media is in the "module C6" state, mc6, during the measurement interval. From /sys/class/drm/card0/gt/gt1/rc6_residency_ms or /sys/class/drm/card0/device/tile0/gtN/gtidle/idle_residency_ms depending on the graphics driver being used.
+.PP
+\fBSAMMHz\fP Instantaneous snapshot of what sysfs presents at the end of the measurement interval. From /sys/class/drm/card0/gt/gt1/rps_cur_freq_mhz or /sys/class/drm/card0/device/tile0/gtN/freq0/cur_freq depending on the graphics driver being used.
+.PP
+\fBSAMAMHz\fP Instantaneous snapshot of what sysfs presents at the end of the measurement interval. From /sys/class/drm/card0/gt/gt1/rps_act_freq_mhz or /sys/class/drm/card0/device/tile0/gtN/freq0/act_freq depending on the graphics driver being used.
 .PP
 \fBPkg%pc2, Pkg%pc3, Pkg%pc6, Pkg%pc7\fP percentage residency in hardware package idle states.  These numbers are from hardware residency counters.
 .PP
@@ -370,7 +382,7 @@ below the processor's base frequency.
 
 Busy% = MPERF_delta/TSC_delta
 
-Bzy_MHz = TSC_delta/APERF_delta/MPERF_delta/measurement_interval
+Bzy_MHz = TSC_delta*APERF_delta/MPERF_delta/measurement_interval
 
 Note that these calculations depend on TSC_delta, so they
 are not reliable during intervals when TSC_MHz is not running at the base frequency.
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 7a334377f92b..98256468e248 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -3,7 +3,7 @@
  * turbostat -- show CPU frequency and C-state residency
  * on modern Intel and AMD processors.
  *
- * Copyright (c) 2023 Intel Corporation.
+ * Copyright (c) 2024 Intel Corporation.
  * Len Brown <len.brown@intel.com>
  */
 
@@ -36,6 +36,8 @@
 #include <linux/perf_event.h>
 #include <asm/unistd.h>
 #include <stdbool.h>
+#include <assert.h>
+#include <linux/kernel.h>
 
 #define UNUSED(x) (void)(x)
 
@@ -53,9 +55,13 @@
 #define	NAME_BYTES 20
 #define PATH_BYTES 128
 
+#define MAX_NOFILE 0x8000
+
 enum counter_scope { SCOPE_CPU, SCOPE_CORE, SCOPE_PACKAGE };
 enum counter_type { COUNTER_ITEMS, COUNTER_CYCLES, COUNTER_SECONDS, COUNTER_USEC };
 enum counter_format { FORMAT_RAW, FORMAT_DELTA, FORMAT_PERCENT };
+enum amperf_source { AMPERF_SOURCE_PERF, AMPERF_SOURCE_MSR };
+enum rapl_source { RAPL_SOURCE_NONE, RAPL_SOURCE_PERF, RAPL_SOURCE_MSR };
 
 struct msr_counter {
 	unsigned int msr_num;
@@ -127,6 +133,9 @@ struct msr_counter bic[] = {
 	{ 0x0, "IPC", "", 0, 0, 0, NULL, 0 },
 	{ 0x0, "CoreThr", "", 0, 0, 0, NULL, 0 },
 	{ 0x0, "UncMHz", "", 0, 0, 0, NULL, 0 },
+	{ 0x0, "SAM%mc6", "", 0, 0, 0, NULL, 0 },
+	{ 0x0, "SAMMHz", "", 0, 0, 0, NULL, 0 },
+	{ 0x0, "SAMAMHz", "", 0, 0, 0, NULL, 0 },
 };
 
 #define MAX_BIC (sizeof(bic) / sizeof(struct msr_counter))
@@ -185,11 +194,14 @@ struct msr_counter bic[] = {
 #define	BIC_IPC		(1ULL << 52)
 #define	BIC_CORE_THROT_CNT	(1ULL << 53)
 #define	BIC_UNCORE_MHZ		(1ULL << 54)
+#define	BIC_SAM_mc6		(1ULL << 55)
+#define	BIC_SAMMHz		(1ULL << 56)
+#define	BIC_SAMACTMHz		(1ULL << 57)
 
 #define BIC_TOPOLOGY (BIC_Package | BIC_Node | BIC_CoreCnt | BIC_PkgCnt | BIC_Core | BIC_CPU | BIC_Die )
 #define BIC_THERMAL_PWR ( BIC_CoreTmp | BIC_PkgTmp | BIC_PkgWatt | BIC_CorWatt | BIC_GFXWatt | BIC_RAMWatt | BIC_PKG__ | BIC_RAM__)
-#define BIC_FREQUENCY ( BIC_Avg_MHz | BIC_Busy | BIC_Bzy_MHz | BIC_TSC_MHz | BIC_GFXMHz | BIC_GFXACTMHz | BIC_UNCORE_MHZ)
-#define BIC_IDLE ( BIC_sysfs | BIC_CPU_c1 | BIC_CPU_c3 | BIC_CPU_c6 | BIC_CPU_c7 | BIC_GFX_rc6 | BIC_Pkgpc2 | BIC_Pkgpc3 | BIC_Pkgpc6 | BIC_Pkgpc7 | BIC_Pkgpc8 | BIC_Pkgpc9 | BIC_Pkgpc10 | BIC_CPU_LPI | BIC_SYS_LPI | BIC_Mod_c6 | BIC_Totl_c0 | BIC_Any_c0 | BIC_GFX_c0 | BIC_CPUGFX)
+#define BIC_FREQUENCY (BIC_Avg_MHz | BIC_Busy | BIC_Bzy_MHz | BIC_TSC_MHz | BIC_GFXMHz | BIC_GFXACTMHz | BIC_SAMMHz | BIC_SAMACTMHz | BIC_UNCORE_MHZ)
+#define BIC_IDLE (BIC_sysfs | BIC_CPU_c1 | BIC_CPU_c3 | BIC_CPU_c6 | BIC_CPU_c7 | BIC_GFX_rc6 | BIC_Pkgpc2 | BIC_Pkgpc3 | BIC_Pkgpc6 | BIC_Pkgpc7 | BIC_Pkgpc8 | BIC_Pkgpc9 | BIC_Pkgpc10 | BIC_CPU_LPI | BIC_SYS_LPI | BIC_Mod_c6 | BIC_Totl_c0 | BIC_Any_c0 | BIC_GFX_c0 | BIC_CPUGFX | BIC_SAM_mc6)
 #define BIC_OTHER ( BIC_IRQ | BIC_SMI | BIC_ThreadC | BIC_CoreTmp | BIC_IPC)
 
 #define BIC_DISABLED_BY_DEFAULT	(BIC_USEC | BIC_TOD | BIC_APIC | BIC_X2APIC)
@@ -204,10 +216,13 @@ unsigned long long bic_present = BIC_USEC | BIC_TOD | BIC_sysfs | BIC_APIC | BIC
 #define BIC_NOT_PRESENT(COUNTER_BIT) (bic_present &= ~COUNTER_BIT)
 #define BIC_IS_ENABLED(COUNTER_BIT) (bic_enabled & COUNTER_BIT)
 
+struct amperf_group_fd;
+
 char *proc_stat = "/proc/stat";
 FILE *outf;
 int *fd_percpu;
 int *fd_instr_count_percpu;
+struct amperf_group_fd *fd_amperf_percpu;	/* File descriptors for perf group with APERF and MPERF counters. */
 struct timeval interval_tv = { 5, 0 };
 struct timespec interval_ts = { 5, 0 };
 
@@ -242,11 +257,8 @@ char *output_buffer, *outp;
 unsigned int do_dts;
 unsigned int do_ptm;
 unsigned int do_ipc;
-unsigned long long gfx_cur_rc6_ms;
 unsigned long long cpuidle_cur_cpu_lpi_us;
 unsigned long long cpuidle_cur_sys_lpi_us;
-unsigned int gfx_cur_mhz;
-unsigned int gfx_act_mhz;
 unsigned int tj_max;
 unsigned int tj_max_override;
 double rapl_power_units, rapl_time_units;
@@ -263,6 +275,28 @@ unsigned int has_hwp_epp;	/* IA32_HWP_REQUEST[bits 31:24] */
 unsigned int has_hwp_pkg;	/* IA32_HWP_REQUEST_PKG */
 unsigned int first_counter_read = 1;
 int ignore_stdin;
+bool no_msr;
+bool no_perf;
+enum amperf_source amperf_source;
+
+enum gfx_sysfs_idx {
+	GFX_rc6,
+	GFX_MHz,
+	GFX_ACTMHz,
+	SAM_mc6,
+	SAM_MHz,
+	SAM_ACTMHz,
+	GFX_MAX
+};
+
+struct gfx_sysfs_info {
+	const char *path;
+	FILE *fp;
+	unsigned int val;
+	unsigned long long val_ull;
+};
+
+static struct gfx_sysfs_info gfx_info[GFX_MAX];
 
 int get_msr(int cpu, off_t offset, unsigned long long *msr);
 
@@ -652,6 +686,7 @@ static const struct platform_features icx_features = {
 	.bclk_freq = BCLK_100MHZ,
 	.supported_cstates = CC1 | CC6 | PC2 | PC6,
 	.cst_limit = CST_LIMIT_ICX,
+	.has_msr_core_c1_res = 1,
 	.has_irtl_msrs = 1,
 	.has_cst_prewake_bit = 1,
 	.trl_msrs = TRL_BASE | TRL_CORECOUNT,
@@ -948,6 +983,175 @@ size_t cpu_present_setsize, cpu_effective_setsize, cpu_allowed_setsize, cpu_affi
 #define MAX_ADDED_THREAD_COUNTERS 24
 #define BITMASK_SIZE 32
 
+/* Indexes used to map data read from perf and MSRs into global variables */
+enum rapl_rci_index {
+	RAPL_RCI_INDEX_ENERGY_PKG = 0,
+	RAPL_RCI_INDEX_ENERGY_CORES = 1,
+	RAPL_RCI_INDEX_DRAM = 2,
+	RAPL_RCI_INDEX_GFX = 3,
+	RAPL_RCI_INDEX_PKG_PERF_STATUS = 4,
+	RAPL_RCI_INDEX_DRAM_PERF_STATUS = 5,
+	RAPL_RCI_INDEX_CORE_ENERGY = 6,
+	NUM_RAPL_COUNTERS,
+};
+
+enum rapl_unit {
+	RAPL_UNIT_INVALID,
+	RAPL_UNIT_JOULES,
+	RAPL_UNIT_WATTS,
+};
+
+struct rapl_counter_info_t {
+	unsigned long long data[NUM_RAPL_COUNTERS];
+	enum rapl_source source[NUM_RAPL_COUNTERS];
+	unsigned long long flags[NUM_RAPL_COUNTERS];
+	double scale[NUM_RAPL_COUNTERS];
+	enum rapl_unit unit[NUM_RAPL_COUNTERS];
+
+	union {
+		/* Active when source == RAPL_SOURCE_MSR */
+		struct {
+			unsigned long long msr[NUM_RAPL_COUNTERS];
+			unsigned long long msr_mask[NUM_RAPL_COUNTERS];
+			int msr_shift[NUM_RAPL_COUNTERS];
+		};
+	};
+
+	int fd_perf;
+};
+
+/* struct rapl_counter_info_t for each RAPL domain */
+struct rapl_counter_info_t *rapl_counter_info_perdomain;
+
+#define RAPL_COUNTER_FLAG_USE_MSR_SUM (1u << 1)
+
+struct rapl_counter_arch_info {
+	int feature_mask;	/* Mask for testing if the counter is supported on host */
+	const char *perf_subsys;
+	const char *perf_name;
+	unsigned long long msr;
+	unsigned long long msr_mask;
+	int msr_shift;		/* Positive mean shift right, negative mean shift left */
+	double *platform_rapl_msr_scale;	/* Scale applied to values read by MSR (platform dependent, filled at runtime) */
+	unsigned int rci_index;	/* Maps data from perf counters to global variables */
+	unsigned long long bic;
+	double compat_scale;	/* Some counters require constant scaling to be in the same range as other, similar ones */
+	unsigned long long flags;
+};
+
+static const struct rapl_counter_arch_info rapl_counter_arch_infos[] = {
+	{
+	 .feature_mask = RAPL_PKG,
+	 .perf_subsys = "power",
+	 .perf_name = "energy-pkg",
+	 .msr = MSR_PKG_ENERGY_STATUS,
+	 .msr_mask = 0xFFFFFFFFFFFFFFFF,
+	 .msr_shift = 0,
+	 .platform_rapl_msr_scale = &rapl_energy_units,
+	 .rci_index = RAPL_RCI_INDEX_ENERGY_PKG,
+	 .bic = BIC_PkgWatt | BIC_Pkg_J,
+	 .compat_scale = 1.0,
+	 .flags = RAPL_COUNTER_FLAG_USE_MSR_SUM,
+	  },
+	{
+	 .feature_mask = RAPL_AMD_F17H,
+	 .perf_subsys = "power",
+	 .perf_name = "energy-pkg",
+	 .msr = MSR_PKG_ENERGY_STAT,
+	 .msr_mask = 0xFFFFFFFFFFFFFFFF,
+	 .msr_shift = 0,
+	 .platform_rapl_msr_scale = &rapl_energy_units,
+	 .rci_index = RAPL_RCI_INDEX_ENERGY_PKG,
+	 .bic = BIC_PkgWatt | BIC_Pkg_J,
+	 .compat_scale = 1.0,
+	 .flags = RAPL_COUNTER_FLAG_USE_MSR_SUM,
+	  },
+	{
+	 .feature_mask = RAPL_CORE_ENERGY_STATUS,
+	 .perf_subsys = "power",
+	 .perf_name = "energy-cores",
+	 .msr = MSR_PP0_ENERGY_STATUS,
+	 .msr_mask = 0xFFFFFFFFFFFFFFFF,
+	 .msr_shift = 0,
+	 .platform_rapl_msr_scale = &rapl_energy_units,
+	 .rci_index = RAPL_RCI_INDEX_ENERGY_CORES,
+	 .bic = BIC_CorWatt | BIC_Cor_J,
+	 .compat_scale = 1.0,
+	 .flags = RAPL_COUNTER_FLAG_USE_MSR_SUM,
+	  },
+	{
+	 .feature_mask = RAPL_DRAM,
+	 .perf_subsys = "power",
+	 .perf_name = "energy-ram",
+	 .msr = MSR_DRAM_ENERGY_STATUS,
+	 .msr_mask = 0xFFFFFFFFFFFFFFFF,
+	 .msr_shift = 0,
+	 .platform_rapl_msr_scale = &rapl_dram_energy_units,
+	 .rci_index = RAPL_RCI_INDEX_DRAM,
+	 .bic = BIC_RAMWatt | BIC_RAM_J,
+	 .compat_scale = 1.0,
+	 .flags = RAPL_COUNTER_FLAG_USE_MSR_SUM,
+	  },
+	{
+	 .feature_mask = RAPL_GFX,
+	 .perf_subsys = "power",
+	 .perf_name = "energy-gpu",
+	 .msr = MSR_PP1_ENERGY_STATUS,
+	 .msr_mask = 0xFFFFFFFFFFFFFFFF,
+	 .msr_shift = 0,
+	 .platform_rapl_msr_scale = &rapl_energy_units,
+	 .rci_index = RAPL_RCI_INDEX_GFX,
+	 .bic = BIC_GFXWatt | BIC_GFX_J,
+	 .compat_scale = 1.0,
+	 .flags = RAPL_COUNTER_FLAG_USE_MSR_SUM,
+	  },
+	{
+	 .feature_mask = RAPL_PKG_PERF_STATUS,
+	 .perf_subsys = NULL,
+	 .perf_name = NULL,
+	 .msr = MSR_PKG_PERF_STATUS,
+	 .msr_mask = 0xFFFFFFFFFFFFFFFF,
+	 .msr_shift = 0,
+	 .platform_rapl_msr_scale = &rapl_time_units,
+	 .rci_index = RAPL_RCI_INDEX_PKG_PERF_STATUS,
+	 .bic = BIC_PKG__,
+	 .compat_scale = 100.0,
+	 .flags = RAPL_COUNTER_FLAG_USE_MSR_SUM,
+	  },
+	{
+	 .feature_mask = RAPL_DRAM_PERF_STATUS,
+	 .perf_subsys = NULL,
+	 .perf_name = NULL,
+	 .msr = MSR_DRAM_PERF_STATUS,
+	 .msr_mask = 0xFFFFFFFFFFFFFFFF,
+	 .msr_shift = 0,
+	 .platform_rapl_msr_scale = &rapl_time_units,
+	 .rci_index = RAPL_RCI_INDEX_DRAM_PERF_STATUS,
+	 .bic = BIC_RAM__,
+	 .compat_scale = 100.0,
+	 .flags = RAPL_COUNTER_FLAG_USE_MSR_SUM,
+	  },
+	{
+	 .feature_mask = RAPL_AMD_F17H,
+	 .perf_subsys = NULL,
+	 .perf_name = NULL,
+	 .msr = MSR_CORE_ENERGY_STAT,
+	 .msr_mask = 0xFFFFFFFF,
+	 .msr_shift = 0,
+	 .platform_rapl_msr_scale = &rapl_energy_units,
+	 .rci_index = RAPL_RCI_INDEX_CORE_ENERGY,
+	 .bic = BIC_CorWatt | BIC_Cor_J,
+	 .compat_scale = 1.0,
+	 .flags = 0,
+	  },
+};
+
+struct rapl_counter {
+	unsigned long long raw_value;
+	enum rapl_unit unit;
+	double scale;
+};
+
 struct thread_data {
 	struct timeval tv_begin;
 	struct timeval tv_end;
@@ -974,7 +1178,7 @@ struct core_data {
 	unsigned long long c7;
 	unsigned long long mc6_us;	/* duplicate as per-core for now, even though per module */
 	unsigned int core_temp_c;
-	unsigned int core_energy;	/* MSR_CORE_ENERGY_STAT */
+	struct rapl_counter core_energy;	/* MSR_CORE_ENERGY_STAT */
 	unsigned int core_id;
 	unsigned long long core_throt_cnt;
 	unsigned long long counter[MAX_ADDED_COUNTERS];
@@ -989,8 +1193,8 @@ struct pkg_data {
 	unsigned long long pc8;
 	unsigned long long pc9;
 	unsigned long long pc10;
-	unsigned long long cpu_lpi;
-	unsigned long long sys_lpi;
+	long long cpu_lpi;
+	long long sys_lpi;
 	unsigned long long pkg_wtd_core_c0;
 	unsigned long long pkg_any_core_c0;
 	unsigned long long pkg_any_gfxe_c0;
@@ -998,13 +1202,16 @@ struct pkg_data {
 	long long gfx_rc6_ms;
 	unsigned int gfx_mhz;
 	unsigned int gfx_act_mhz;
+	long long sam_mc6_ms;
+	unsigned int sam_mhz;
+	unsigned int sam_act_mhz;
 	unsigned int package_id;
-	unsigned long long energy_pkg;	/* MSR_PKG_ENERGY_STATUS */
-	unsigned long long energy_dram;	/* MSR_DRAM_ENERGY_STATUS */
-	unsigned long long energy_cores;	/* MSR_PP0_ENERGY_STATUS */
-	unsigned long long energy_gfx;	/* MSR_PP1_ENERGY_STATUS */
-	unsigned long long rapl_pkg_perf_status;	/* MSR_PKG_PERF_STATUS */
-	unsigned long long rapl_dram_perf_status;	/* MSR_DRAM_PERF_STATUS */
+	struct rapl_counter energy_pkg;	/* MSR_PKG_ENERGY_STATUS */
+	struct rapl_counter energy_dram;	/* MSR_DRAM_ENERGY_STATUS */
+	struct rapl_counter energy_cores;	/* MSR_PP0_ENERGY_STATUS */
+	struct rapl_counter energy_gfx;	/* MSR_PP1_ENERGY_STATUS */
+	struct rapl_counter rapl_pkg_perf_status;	/* MSR_PKG_PERF_STATUS */
+	struct rapl_counter rapl_dram_perf_status;	/* MSR_DRAM_PERF_STATUS */
 	unsigned int pkg_temp_c;
 	unsigned int uncore_mhz;
 	unsigned long long counter[MAX_ADDED_COUNTERS];
@@ -1150,6 +1357,38 @@ struct sys_counters {
 	struct msr_counter *pp;
 } sys;
 
+void free_sys_counters(void)
+{
+	struct msr_counter *p = sys.tp, *pnext = NULL;
+
+	while (p) {
+		pnext = p->next;
+		free(p);
+		p = pnext;
+	}
+
+	p = sys.cp, pnext = NULL;
+	while (p) {
+		pnext = p->next;
+		free(p);
+		p = pnext;
+	}
+
+	p = sys.pp, pnext = NULL;
+	while (p) {
+		pnext = p->next;
+		free(p);
+		p = pnext;
+	}
+
+	sys.added_thread_counters = 0;
+	sys.added_core_counters = 0;
+	sys.added_package_counters = 0;
+	sys.tp = NULL;
+	sys.cp = NULL;
+	sys.pp = NULL;
+}
+
 struct system_summary {
 	struct thread_data threads;
 	struct core_data cores;
@@ -1280,34 +1519,60 @@ int get_msr_fd(int cpu)
 	sprintf(pathname, "/dev/cpu/%d/msr", cpu);
 	fd = open(pathname, O_RDONLY);
 	if (fd < 0)
-		err(-1, "%s open failed, try chown or chmod +r /dev/cpu/*/msr, or run as root", pathname);
+		err(-1, "%s open failed, try chown or chmod +r /dev/cpu/*/msr, "
+		    "or run with --no-msr, or run as root", pathname);
 
 	fd_percpu[cpu] = fd;
 
 	return fd;
 }
 
+static void bic_disable_msr_access(void)
+{
+	const unsigned long bic_msrs =
+	    BIC_SMI |
+	    BIC_CPU_c1 |
+	    BIC_CPU_c3 |
+	    BIC_CPU_c6 |
+	    BIC_CPU_c7 |
+	    BIC_Mod_c6 |
+	    BIC_CoreTmp |
+	    BIC_Totl_c0 |
+	    BIC_Any_c0 |
+	    BIC_GFX_c0 |
+	    BIC_CPUGFX |
+	    BIC_Pkgpc2 | BIC_Pkgpc3 | BIC_Pkgpc6 | BIC_Pkgpc7 | BIC_Pkgpc8 | BIC_Pkgpc9 | BIC_Pkgpc10 | BIC_PkgTmp;
+
+	bic_enabled &= ~bic_msrs;
+
+	free_sys_counters();
+}
+
 static long perf_event_open(struct perf_event_attr *hw_event, pid_t pid, int cpu, int group_fd, unsigned long flags)
 {
+	assert(!no_perf);
+
 	return syscall(__NR_perf_event_open, hw_event, pid, cpu, group_fd, flags);
 }
 
-static int perf_instr_count_open(int cpu_num)
+static long open_perf_counter(int cpu, unsigned int type, unsigned int config, int group_fd, __u64 read_format)
 {
-	struct perf_event_attr pea;
-	int fd;
+	struct perf_event_attr attr;
+	const pid_t pid = -1;
+	const unsigned long flags = 0;
 
-	memset(&pea, 0, sizeof(struct perf_event_attr));
-	pea.type = PERF_TYPE_HARDWARE;
-	pea.size = sizeof(struct perf_event_attr);
-	pea.config = PERF_COUNT_HW_INSTRUCTIONS;
+	assert(!no_perf);
 
-	/* counter for cpu_num, including user + kernel and all processes */
-	fd = perf_event_open(&pea, -1, cpu_num, -1, 0);
-	if (fd == -1) {
-		warnx("capget(CAP_PERFMON) failed, try \"# setcap cap_sys_admin=ep %s\"", progname);
-		BIC_NOT_PRESENT(BIC_IPC);
-	}
+	memset(&attr, 0, sizeof(struct perf_event_attr));
+
+	attr.type = type;
+	attr.size = sizeof(struct perf_event_attr);
+	attr.config = config;
+	attr.disabled = 0;
+	attr.sample_type = PERF_SAMPLE_IDENTIFIER;
+	attr.read_format = read_format;
+
+	const int fd = perf_event_open(&attr, pid, cpu, group_fd, flags);
 
 	return fd;
 }
@@ -1317,7 +1582,7 @@ int get_instr_count_fd(int cpu)
 	if (fd_instr_count_percpu[cpu])
 		return fd_instr_count_percpu[cpu];
 
-	fd_instr_count_percpu[cpu] = perf_instr_count_open(cpu);
+	fd_instr_count_percpu[cpu] = open_perf_counter(cpu, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS, -1, 0);
 
 	return fd_instr_count_percpu[cpu];
 }
@@ -1326,6 +1591,8 @@ int get_msr(int cpu, off_t offset, unsigned long long *msr)
 {
 	ssize_t retval;
 
+	assert(!no_msr);
+
 	retval = pread(get_msr_fd(cpu), msr, sizeof(*msr), offset);
 
 	if (retval != sizeof *msr)
@@ -1334,6 +1601,21 @@ int get_msr(int cpu, off_t offset, unsigned long long *msr)
 	return 0;
 }
 
+int probe_msr(int cpu, off_t offset)
+{
+	ssize_t retval;
+	unsigned long long dummy;
+
+	assert(!no_msr);
+
+	retval = pread(get_msr_fd(cpu), &dummy, sizeof(dummy), offset);
+
+	if (retval != sizeof(dummy))
+		return 1;
+
+	return 0;
+}
+
 #define MAX_DEFERRED 16
 char *deferred_add_names[MAX_DEFERRED];
 char *deferred_skip_names[MAX_DEFERRED];
@@ -1369,6 +1651,8 @@ void help(void)
 		"		Override default 5-second measurement interval\n"
 		"  -J, --Joules	displays energy in Joules instead of Watts\n"
 		"  -l, --list	list column headers only\n"
+		"  -M, --no-msr Disable all uses of the MSR driver\n"
+		"  -P, --no-perf Disable all uses of the perf API\n"
 		"  -n, --num_iterations num\n"
 		"		number of the measurement iterations\n"
 		"  -N, --header_iterations num\n"
@@ -1573,6 +1857,15 @@ void print_header(char *delim)
 	if (DO_BIC(BIC_GFXACTMHz))
 		outp += sprintf(outp, "%sGFXAMHz", (printed++ ? delim : ""));
 
+	if (DO_BIC(BIC_SAM_mc6))
+		outp += sprintf(outp, "%sSAM%%mc6", (printed++ ? delim : ""));
+
+	if (DO_BIC(BIC_SAMMHz))
+		outp += sprintf(outp, "%sSAMMHz", (printed++ ? delim : ""));
+
+	if (DO_BIC(BIC_SAMACTMHz))
+		outp += sprintf(outp, "%sSAMAMHz", (printed++ ? delim : ""));
+
 	if (DO_BIC(BIC_Totl_c0))
 		outp += sprintf(outp, "%sTotl%%C0", (printed++ ? delim : ""));
 	if (DO_BIC(BIC_Any_c0))
@@ -1671,26 +1964,35 @@ int dump_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p
 			outp += sprintf(outp, "SMI: %d\n", t->smi_count);
 
 		for (i = 0, mp = sys.tp; mp; i++, mp = mp->next) {
-			outp += sprintf(outp, "tADDED [%d] msr0x%x: %08llX\n", i, mp->msr_num, t->counter[i]);
+			outp +=
+			    sprintf(outp, "tADDED [%d] %8s msr0x%x: %08llX %s\n", i, mp->name, mp->msr_num,
+				    t->counter[i], mp->path);
 		}
 	}
 
-	if (c) {
+	if (c && is_cpu_first_thread_in_core(t, c, p)) {
 		outp += sprintf(outp, "core: %d\n", c->core_id);
 		outp += sprintf(outp, "c3: %016llX\n", c->c3);
 		outp += sprintf(outp, "c6: %016llX\n", c->c6);
 		outp += sprintf(outp, "c7: %016llX\n", c->c7);
 		outp += sprintf(outp, "DTS: %dC\n", c->core_temp_c);
 		outp += sprintf(outp, "cpu_throt_count: %016llX\n", c->core_throt_cnt);
-		outp += sprintf(outp, "Joules: %0X\n", c->core_energy);
+
+		const unsigned long long energy_value = c->core_energy.raw_value * c->core_energy.scale;
+		const double energy_scale = c->core_energy.scale;
+
+		if (c->core_energy.unit == RAPL_UNIT_JOULES)
+			outp += sprintf(outp, "Joules: %0llX (scale: %lf)\n", energy_value, energy_scale);
 
 		for (i = 0, mp = sys.cp; mp; i++, mp = mp->next) {
-			outp += sprintf(outp, "cADDED [%d] msr0x%x: %08llX\n", i, mp->msr_num, c->counter[i]);
+			outp +=
+			    sprintf(outp, "cADDED [%d] %8s msr0x%x: %08llX %s\n", i, mp->name, mp->msr_num,
+				    c->counter[i], mp->path);
 		}
 		outp += sprintf(outp, "mc6_us: %016llX\n", c->mc6_us);
 	}
 
-	if (p) {
+	if (p && is_cpu_first_core_in_package(t, c, p)) {
 		outp += sprintf(outp, "package: %d\n", p->package_id);
 
 		outp += sprintf(outp, "Weighted cores: %016llX\n", p->pkg_wtd_core_c0);
@@ -1710,16 +2012,18 @@ int dump_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p
 		outp += sprintf(outp, "pc10: %016llX\n", p->pc10);
 		outp += sprintf(outp, "cpu_lpi: %016llX\n", p->cpu_lpi);
 		outp += sprintf(outp, "sys_lpi: %016llX\n", p->sys_lpi);
-		outp += sprintf(outp, "Joules PKG: %0llX\n", p->energy_pkg);
-		outp += sprintf(outp, "Joules COR: %0llX\n", p->energy_cores);
-		outp += sprintf(outp, "Joules GFX: %0llX\n", p->energy_gfx);
-		outp += sprintf(outp, "Joules RAM: %0llX\n", p->energy_dram);
-		outp += sprintf(outp, "Throttle PKG: %0llX\n", p->rapl_pkg_perf_status);
-		outp += sprintf(outp, "Throttle RAM: %0llX\n", p->rapl_dram_perf_status);
+		outp += sprintf(outp, "Joules PKG: %0llX\n", p->energy_pkg.raw_value);
+		outp += sprintf(outp, "Joules COR: %0llX\n", p->energy_cores.raw_value);
+		outp += sprintf(outp, "Joules GFX: %0llX\n", p->energy_gfx.raw_value);
+		outp += sprintf(outp, "Joules RAM: %0llX\n", p->energy_dram.raw_value);
+		outp += sprintf(outp, "Throttle PKG: %0llX\n", p->rapl_pkg_perf_status.raw_value);
+		outp += sprintf(outp, "Throttle RAM: %0llX\n", p->rapl_dram_perf_status.raw_value);
 		outp += sprintf(outp, "PTM: %dC\n", p->pkg_temp_c);
 
 		for (i = 0, mp = sys.pp; mp; i++, mp = mp->next) {
-			outp += sprintf(outp, "pADDED [%d] msr0x%x: %08llX\n", i, mp->msr_num, p->counter[i]);
+			outp +=
+			    sprintf(outp, "pADDED [%d] %8s msr0x%x: %08llX %s\n", i, mp->name, mp->msr_num,
+				    p->counter[i], mp->path);
 		}
 	}
 
@@ -1728,6 +2032,23 @@ int dump_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p
 	return 0;
 }
 
+double rapl_counter_get_value(const struct rapl_counter *c, enum rapl_unit desired_unit, double interval)
+{
+	assert(desired_unit != RAPL_UNIT_INVALID);
+
+	/*
+	 * For now we don't expect anything other than joules,
+	 * so just simplify the logic.
+	 */
+	assert(c->unit == RAPL_UNIT_JOULES);
+
+	const double scaled = c->raw_value * c->scale;
+
+	if (desired_unit == RAPL_UNIT_WATTS)
+		return scaled / interval;
+	return scaled;
+}
+
 /*
  * column formatting convention & formats
  */
@@ -1921,9 +2242,11 @@ int format_counters(struct thread_data *t, struct core_data *c, struct pkg_data
 
 	if (DO_BIC(BIC_CorWatt) && platform->has_per_core_rapl)
 		outp +=
-		    sprintf(outp, fmt8, (printed++ ? delim : ""), c->core_energy * rapl_energy_units / interval_float);
+		    sprintf(outp, fmt8, (printed++ ? delim : ""),
+			    rapl_counter_get_value(&c->core_energy, RAPL_UNIT_WATTS, interval_float));
 	if (DO_BIC(BIC_Cor_J) && platform->has_per_core_rapl)
-		outp += sprintf(outp, fmt8, (printed++ ? delim : ""), c->core_energy * rapl_energy_units);
+		outp += sprintf(outp, fmt8, (printed++ ? delim : ""),
+				rapl_counter_get_value(&c->core_energy, RAPL_UNIT_JOULES, interval_float));
 
 	/* print per-package data only for 1st core in package */
 	if (!is_cpu_first_core_in_package(t, c, p))
@@ -1951,6 +2274,24 @@ int format_counters(struct thread_data *t, struct core_data *c, struct pkg_data
 	if (DO_BIC(BIC_GFXACTMHz))
 		outp += sprintf(outp, "%s%d", (printed++ ? delim : ""), p->gfx_act_mhz);
 
+	/* SAMmc6 */
+	if (DO_BIC(BIC_SAM_mc6)) {
+		if (p->sam_mc6_ms == -1) {	/* detect GFX counter reset */
+			outp += sprintf(outp, "%s**.**", (printed++ ? delim : ""));
+		} else {
+			outp += sprintf(outp, "%s%.2f", (printed++ ? delim : ""),
+					p->sam_mc6_ms / 10.0 / interval_float);
+		}
+	}
+
+	/* SAMMHz */
+	if (DO_BIC(BIC_SAMMHz))
+		outp += sprintf(outp, "%s%d", (printed++ ? delim : ""), p->sam_mhz);
+
+	/* SAMACTMHz */
+	if (DO_BIC(BIC_SAMACTMHz))
+		outp += sprintf(outp, "%s%d", (printed++ ? delim : ""), p->sam_act_mhz);
+
 	/* Totl%C0, Any%C0 GFX%C0 CPUGFX% */
 	if (DO_BIC(BIC_Totl_c0))
 		outp += sprintf(outp, "%s%.2f", (printed++ ? delim : ""), 100.0 * p->pkg_wtd_core_c0 / tsc);
@@ -1976,43 +2317,59 @@ int format_counters(struct thread_data *t, struct core_data *c, struct pkg_data
 	if (DO_BIC(BIC_Pkgpc10))
 		outp += sprintf(outp, "%s%.2f", (printed++ ? delim : ""), 100.0 * p->pc10 / tsc);
 
-	if (DO_BIC(BIC_CPU_LPI))
-		outp +=
-		    sprintf(outp, "%s%.2f", (printed++ ? delim : ""), 100.0 * p->cpu_lpi / 1000000.0 / interval_float);
-	if (DO_BIC(BIC_SYS_LPI))
-		outp +=
-		    sprintf(outp, "%s%.2f", (printed++ ? delim : ""), 100.0 * p->sys_lpi / 1000000.0 / interval_float);
+	if (DO_BIC(BIC_CPU_LPI)) {
+		if (p->cpu_lpi >= 0)
+			outp +=
+			    sprintf(outp, "%s%.2f", (printed++ ? delim : ""),
+				    100.0 * p->cpu_lpi / 1000000.0 / interval_float);
+		else
+			outp += sprintf(outp, "%s(neg)", (printed++ ? delim : ""));
+	}
+	if (DO_BIC(BIC_SYS_LPI)) {
+		if (p->sys_lpi >= 0)
+			outp +=
+			    sprintf(outp, "%s%.2f", (printed++ ? delim : ""),
+				    100.0 * p->sys_lpi / 1000000.0 / interval_float);
+		else
+			outp += sprintf(outp, "%s(neg)", (printed++ ? delim : ""));
+	}
 
 	if (DO_BIC(BIC_PkgWatt))
 		outp +=
-		    sprintf(outp, fmt8, (printed++ ? delim : ""), p->energy_pkg * rapl_energy_units / interval_float);
-
+		    sprintf(outp, fmt8, (printed++ ? delim : ""),
+			    rapl_counter_get_value(&p->energy_pkg, RAPL_UNIT_WATTS, interval_float));
 	if (DO_BIC(BIC_CorWatt) && !platform->has_per_core_rapl)
 		outp +=
-		    sprintf(outp, fmt8, (printed++ ? delim : ""), p->energy_cores * rapl_energy_units / interval_float);
+		    sprintf(outp, fmt8, (printed++ ? delim : ""),
+			    rapl_counter_get_value(&p->energy_cores, RAPL_UNIT_WATTS, interval_float));
 	if (DO_BIC(BIC_GFXWatt))
 		outp +=
-		    sprintf(outp, fmt8, (printed++ ? delim : ""), p->energy_gfx * rapl_energy_units / interval_float);
+		    sprintf(outp, fmt8, (printed++ ? delim : ""),
+			    rapl_counter_get_value(&p->energy_gfx, RAPL_UNIT_WATTS, interval_float));
 	if (DO_BIC(BIC_RAMWatt))
 		outp +=
 		    sprintf(outp, fmt8, (printed++ ? delim : ""),
-			    p->energy_dram * rapl_dram_energy_units / interval_float);
+			    rapl_counter_get_value(&p->energy_dram, RAPL_UNIT_WATTS, interval_float));
 	if (DO_BIC(BIC_Pkg_J))
-		outp += sprintf(outp, fmt8, (printed++ ? delim : ""), p->energy_pkg * rapl_energy_units);
+		outp += sprintf(outp, fmt8, (printed++ ? delim : ""),
+				rapl_counter_get_value(&p->energy_pkg, RAPL_UNIT_JOULES, interval_float));
 	if (DO_BIC(BIC_Cor_J) && !platform->has_per_core_rapl)
-		outp += sprintf(outp, fmt8, (printed++ ? delim : ""), p->energy_cores * rapl_energy_units);
+		outp += sprintf(outp, fmt8, (printed++ ? delim : ""),
+				rapl_counter_get_value(&p->energy_cores, RAPL_UNIT_JOULES, interval_float));
 	if (DO_BIC(BIC_GFX_J))
-		outp += sprintf(outp, fmt8, (printed++ ? delim : ""), p->energy_gfx * rapl_energy_units);
+		outp += sprintf(outp, fmt8, (printed++ ? delim : ""),
+				rapl_counter_get_value(&p->energy_gfx, RAPL_UNIT_JOULES, interval_float));
 	if (DO_BIC(BIC_RAM_J))
-		outp += sprintf(outp, fmt8, (printed++ ? delim : ""), p->energy_dram * rapl_dram_energy_units);
+		outp += sprintf(outp, fmt8, (printed++ ? delim : ""),
+				rapl_counter_get_value(&p->energy_dram, RAPL_UNIT_JOULES, interval_float));
 	if (DO_BIC(BIC_PKG__))
 		outp +=
 		    sprintf(outp, fmt8, (printed++ ? delim : ""),
-			    100.0 * p->rapl_pkg_perf_status * rapl_time_units / interval_float);
+			    rapl_counter_get_value(&p->rapl_pkg_perf_status, RAPL_UNIT_WATTS, interval_float));
 	if (DO_BIC(BIC_RAM__))
 		outp +=
 		    sprintf(outp, fmt8, (printed++ ? delim : ""),
-			    100.0 * p->rapl_dram_perf_status * rapl_time_units / interval_float);
+			    rapl_counter_get_value(&p->rapl_dram_perf_status, RAPL_UNIT_WATTS, interval_float));
 	/* UncMHz */
 	if (DO_BIC(BIC_UNCORE_MHZ))
 		outp += sprintf(outp, "%s%d", (printed++ ? delim : ""), p->uncore_mhz);
@@ -2121,12 +2478,22 @@ int delta_package(struct pkg_data *new, struct pkg_data *old)
 	old->gfx_mhz = new->gfx_mhz;
 	old->gfx_act_mhz = new->gfx_act_mhz;
 
-	old->energy_pkg = new->energy_pkg - old->energy_pkg;
-	old->energy_cores = new->energy_cores - old->energy_cores;
-	old->energy_gfx = new->energy_gfx - old->energy_gfx;
-	old->energy_dram = new->energy_dram - old->energy_dram;
-	old->rapl_pkg_perf_status = new->rapl_pkg_perf_status - old->rapl_pkg_perf_status;
-	old->rapl_dram_perf_status = new->rapl_dram_perf_status - old->rapl_dram_perf_status;
+	/* flag an error when mc6 counter resets/wraps */
+	if (old->sam_mc6_ms > new->sam_mc6_ms)
+		old->sam_mc6_ms = -1;
+	else
+		old->sam_mc6_ms = new->sam_mc6_ms - old->sam_mc6_ms;
+
+	old->sam_mhz = new->sam_mhz;
+	old->sam_act_mhz = new->sam_act_mhz;
+
+	old->energy_pkg.raw_value = new->energy_pkg.raw_value - old->energy_pkg.raw_value;
+	old->energy_cores.raw_value = new->energy_cores.raw_value - old->energy_cores.raw_value;
+	old->energy_gfx.raw_value = new->energy_gfx.raw_value - old->energy_gfx.raw_value;
+	old->energy_dram.raw_value = new->energy_dram.raw_value - old->energy_dram.raw_value;
+	old->rapl_pkg_perf_status.raw_value = new->rapl_pkg_perf_status.raw_value - old->rapl_pkg_perf_status.raw_value;
+	old->rapl_dram_perf_status.raw_value =
+	    new->rapl_dram_perf_status.raw_value - old->rapl_dram_perf_status.raw_value;
 
 	for (i = 0, mp = sys.pp; mp; i++, mp = mp->next) {
 		if (mp->format == FORMAT_RAW)
@@ -2150,7 +2517,7 @@ void delta_core(struct core_data *new, struct core_data *old)
 	old->core_throt_cnt = new->core_throt_cnt;
 	old->mc6_us = new->mc6_us - old->mc6_us;
 
-	DELTA_WRAP32(new->core_energy, old->core_energy);
+	DELTA_WRAP32(new->core_energy.raw_value, old->core_energy.raw_value);
 
 	for (i = 0, mp = sys.cp; mp; i++, mp = mp->next) {
 		if (mp->format == FORMAT_RAW)
@@ -2277,6 +2644,13 @@ int delta_cpu(struct thread_data *t, struct core_data *c,
 	return retval;
 }
 
+void rapl_counter_clear(struct rapl_counter *c)
+{
+	c->raw_value = 0;
+	c->scale = 0.0;
+	c->unit = RAPL_UNIT_INVALID;
+}
+
 void clear_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
 {
 	int i;
@@ -2304,7 +2678,7 @@ void clear_counters(struct thread_data *t, struct core_data *c, struct pkg_data
 	c->c7 = 0;
 	c->mc6_us = 0;
 	c->core_temp_c = 0;
-	c->core_energy = 0;
+	rapl_counter_clear(&c->core_energy);
 	c->core_throt_cnt = 0;
 
 	p->pkg_wtd_core_c0 = 0;
@@ -2325,18 +2699,21 @@ void clear_counters(struct thread_data *t, struct core_data *c, struct pkg_data
 	p->cpu_lpi = 0;
 	p->sys_lpi = 0;
 
-	p->energy_pkg = 0;
-	p->energy_dram = 0;
-	p->energy_cores = 0;
-	p->energy_gfx = 0;
-	p->rapl_pkg_perf_status = 0;
-	p->rapl_dram_perf_status = 0;
+	rapl_counter_clear(&p->energy_pkg);
+	rapl_counter_clear(&p->energy_dram);
+	rapl_counter_clear(&p->energy_cores);
+	rapl_counter_clear(&p->energy_gfx);
+	rapl_counter_clear(&p->rapl_pkg_perf_status);
+	rapl_counter_clear(&p->rapl_dram_perf_status);
 	p->pkg_temp_c = 0;
 
 	p->gfx_rc6_ms = 0;
 	p->uncore_mhz = 0;
 	p->gfx_mhz = 0;
 	p->gfx_act_mhz = 0;
+	p->sam_mc6_ms = 0;
+	p->sam_mhz = 0;
+	p->sam_act_mhz = 0;
 	for (i = 0, mp = sys.tp; mp; i++, mp = mp->next)
 		t->counter[i] = 0;
 
@@ -2347,6 +2724,20 @@ void clear_counters(struct thread_data *t, struct core_data *c, struct pkg_data
 		p->counter[i] = 0;
 }
 
+void rapl_counter_accumulate(struct rapl_counter *dst, const struct rapl_counter *src)
+{
+	/* Copy unit and scale from src if dst is not initialized */
+	if (dst->unit == RAPL_UNIT_INVALID) {
+		dst->unit = src->unit;
+		dst->scale = src->scale;
+	}
+
+	assert(dst->unit == src->unit);
+	assert(dst->scale == src->scale);
+
+	dst->raw_value += src->raw_value;
+}
+
 int sum_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
 {
 	int i;
@@ -2393,7 +2784,7 @@ int sum_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
 	average.cores.core_temp_c = MAX(average.cores.core_temp_c, c->core_temp_c);
 	average.cores.core_throt_cnt = MAX(average.cores.core_throt_cnt, c->core_throt_cnt);
 
-	average.cores.core_energy += c->core_energy;
+	rapl_counter_accumulate(&average.cores.core_energy, &c->core_energy);
 
 	for (i = 0, mp = sys.cp; mp; i++, mp = mp->next) {
 		if (mp->format == FORMAT_RAW)
@@ -2428,25 +2819,29 @@ int sum_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
 	average.packages.cpu_lpi = p->cpu_lpi;
 	average.packages.sys_lpi = p->sys_lpi;
 
-	average.packages.energy_pkg += p->energy_pkg;
-	average.packages.energy_dram += p->energy_dram;
-	average.packages.energy_cores += p->energy_cores;
-	average.packages.energy_gfx += p->energy_gfx;
+	rapl_counter_accumulate(&average.packages.energy_pkg, &p->energy_pkg);
+	rapl_counter_accumulate(&average.packages.energy_dram, &p->energy_dram);
+	rapl_counter_accumulate(&average.packages.energy_cores, &p->energy_cores);
+	rapl_counter_accumulate(&average.packages.energy_gfx, &p->energy_gfx);
 
 	average.packages.gfx_rc6_ms = p->gfx_rc6_ms;
 	average.packages.uncore_mhz = p->uncore_mhz;
 	average.packages.gfx_mhz = p->gfx_mhz;
 	average.packages.gfx_act_mhz = p->gfx_act_mhz;
+	average.packages.sam_mc6_ms = p->sam_mc6_ms;
+	average.packages.sam_mhz = p->sam_mhz;
+	average.packages.sam_act_mhz = p->sam_act_mhz;
 
 	average.packages.pkg_temp_c = MAX(average.packages.pkg_temp_c, p->pkg_temp_c);
 
-	average.packages.rapl_pkg_perf_status += p->rapl_pkg_perf_status;
-	average.packages.rapl_dram_perf_status += p->rapl_dram_perf_status;
+	rapl_counter_accumulate(&average.packages.rapl_pkg_perf_status, &p->rapl_pkg_perf_status);
+	rapl_counter_accumulate(&average.packages.rapl_dram_perf_status, &p->rapl_dram_perf_status);
 
 	for (i = 0, mp = sys.pp; mp; i++, mp = mp->next) {
-		if (mp->format == FORMAT_RAW)
-			continue;
-		average.packages.counter[i] += p->counter[i];
+		if ((mp->format == FORMAT_RAW) && (topo.num_packages == 0))
+			average.packages.counter[i] = p->counter[i];
+		else
+			average.packages.counter[i] += p->counter[i];
 	}
 	return 0;
 }
@@ -2578,6 +2973,7 @@ unsigned long long snapshot_sysfs_counter(char *path)
 int get_mp(int cpu, struct msr_counter *mp, unsigned long long *counterp)
 {
 	if (mp->msr_num != 0) {
+		assert(!no_msr);
 		if (get_msr(cpu, mp->msr_num, counterp))
 			return -1;
 	} else {
@@ -2599,7 +2995,7 @@ unsigned long long get_uncore_mhz(int package, int die)
 {
 	char path[128];
 
-	sprintf(path, "/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/current_freq_khz", package,
+	sprintf(path, "/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d/current_freq_khz", package,
 		die);
 
 	return (snapshot_sysfs_counter(path) / 1000);
@@ -2627,6 +3023,9 @@ int get_epb(int cpu)
 	return epb;
 
 msr_fallback:
+	if (no_msr)
+		return -1;
+
 	get_msr(cpu, MSR_IA32_ENERGY_PERF_BIAS, &msr);
 
 	return msr & 0xf;
@@ -2700,6 +3099,351 @@ int get_core_throt_cnt(int cpu, unsigned long long *cnt)
 	return 0;
 }
 
+struct amperf_group_fd {
+	int aperf;		/* Also the group descriptor */
+	int mperf;
+};
+
+static int read_perf_counter_info(const char *const path, const char *const parse_format, void *value_ptr)
+{
+	int fdmt;
+	int bytes_read;
+	char buf[64];
+	int ret = -1;
+
+	fdmt = open(path, O_RDONLY, 0);
+	if (fdmt == -1) {
+		if (debug)
+			fprintf(stderr, "Failed to parse perf counter info %s\n", path);
+		ret = -1;
+		goto cleanup_and_exit;
+	}
+
+	bytes_read = read(fdmt, buf, sizeof(buf) - 1);
+	if (bytes_read <= 0 || bytes_read >= (int)sizeof(buf)) {
+		if (debug)
+			fprintf(stderr, "Failed to parse perf counter info %s\n", path);
+		ret = -1;
+		goto cleanup_and_exit;
+	}
+
+	buf[bytes_read] = '\0';
+
+	if (sscanf(buf, parse_format, value_ptr) != 1) {
+		if (debug)
+			fprintf(stderr, "Failed to parse perf counter info %s\n", path);
+		ret = -1;
+		goto cleanup_and_exit;
+	}
+
+	ret = 0;
+
+cleanup_and_exit:
+	close(fdmt);
+	return ret;
+}
+
+static unsigned int read_perf_counter_info_n(const char *const path, const char *const parse_format)
+{
+	unsigned int v;
+	int status;
+
+	status = read_perf_counter_info(path, parse_format, &v);
+	if (status)
+		v = -1;
+
+	return v;
+}
+
+static unsigned int read_msr_type(void)
+{
+	const char *const path = "/sys/bus/event_source/devices/msr/type";
+	const char *const format = "%u";
+
+	return read_perf_counter_info_n(path, format);
+}
+
+static unsigned int read_aperf_config(void)
+{
+	const char *const path = "/sys/bus/event_source/devices/msr/events/aperf";
+	const char *const format = "event=%x";
+
+	return read_perf_counter_info_n(path, format);
+}
+
+static unsigned int read_mperf_config(void)
+{
+	const char *const path = "/sys/bus/event_source/devices/msr/events/mperf";
+	const char *const format = "event=%x";
+
+	return read_perf_counter_info_n(path, format);
+}
+
+static unsigned int read_perf_type(const char *subsys)
+{
+	const char *const path_format = "/sys/bus/event_source/devices/%s/type";
+	const char *const format = "%u";
+	char path[128];
+
+	snprintf(path, sizeof(path), path_format, subsys);
+
+	return read_perf_counter_info_n(path, format);
+}
+
+static unsigned int read_rapl_config(const char *subsys, const char *event_name)
+{
+	const char *const path_format = "/sys/bus/event_source/devices/%s/events/%s";
+	const char *const format = "event=%x";
+	char path[128];
+
+	snprintf(path, sizeof(path), path_format, subsys, event_name);
+
+	return read_perf_counter_info_n(path, format);
+}
+
+static unsigned int read_perf_rapl_unit(const char *subsys, const char *event_name)
+{
+	const char *const path_format = "/sys/bus/event_source/devices/%s/events/%s.unit";
+	const char *const format = "%s";
+	char path[128];
+	char unit_buffer[16];
+
+	snprintf(path, sizeof(path), path_format, subsys, event_name);
+
+	read_perf_counter_info(path, format, &unit_buffer);
+	if (strcmp("Joules", unit_buffer) == 0)
+		return RAPL_UNIT_JOULES;
+
+	return RAPL_UNIT_INVALID;
+}
+
+static double read_perf_rapl_scale(const char *subsys, const char *event_name)
+{
+	const char *const path_format = "/sys/bus/event_source/devices/%s/events/%s.scale";
+	const char *const format = "%lf";
+	char path[128];
+	double scale;
+
+	snprintf(path, sizeof(path), path_format, subsys, event_name);
+
+	if (read_perf_counter_info(path, format, &scale))
+		return 0.0;
+
+	return scale;
+}
+
+static struct amperf_group_fd open_amperf_fd(int cpu)
+{
+	const unsigned int msr_type = read_msr_type();
+	const unsigned int aperf_config = read_aperf_config();
+	const unsigned int mperf_config = read_mperf_config();
+	struct amperf_group_fd fds = {.aperf = -1, .mperf = -1 };
+
+	fds.aperf = open_perf_counter(cpu, msr_type, aperf_config, -1, PERF_FORMAT_GROUP);
+	fds.mperf = open_perf_counter(cpu, msr_type, mperf_config, fds.aperf, PERF_FORMAT_GROUP);
+
+	return fds;
+}
+
+static int get_amperf_fd(int cpu)
+{
+	assert(fd_amperf_percpu);
+
+	if (fd_amperf_percpu[cpu].aperf)
+		return fd_amperf_percpu[cpu].aperf;
+
+	fd_amperf_percpu[cpu] = open_amperf_fd(cpu);
+
+	return fd_amperf_percpu[cpu].aperf;
+}
+
+/* Read APERF, MPERF and TSC using the perf API. */
+static int read_aperf_mperf_tsc_perf(struct thread_data *t, int cpu)
+{
+	union {
+		struct {
+			unsigned long nr_entries;
+			unsigned long aperf;
+			unsigned long mperf;
+		};
+
+		unsigned long as_array[3];
+	} cnt;
+
+	const int fd_amperf = get_amperf_fd(cpu);
+
+	/*
+	 * Read the TSC with rdtsc, because we want the absolute value and not
+	 * the offset from the start of the counter.
+	 */
+	t->tsc = rdtsc();
+
+	const int n = read(fd_amperf, &cnt.as_array[0], sizeof(cnt.as_array));
+
+	if (n != sizeof(cnt.as_array))
+		return -2;
+
+	t->aperf = cnt.aperf * aperf_mperf_multiplier;
+	t->mperf = cnt.mperf * aperf_mperf_multiplier;
+
+	return 0;
+}
+
+/* Read APERF, MPERF and TSC using the MSR driver and rdtsc instruction. */
+static int read_aperf_mperf_tsc_msr(struct thread_data *t, int cpu)
+{
+	unsigned long long tsc_before, tsc_between, tsc_after, aperf_time, mperf_time;
+	int aperf_mperf_retry_count = 0;
+
+	/*
+	 * The TSC, APERF and MPERF must be read together for
+	 * APERF/MPERF and MPERF/TSC to give accurate results.
+	 *
+	 * Unfortunately, APERF and MPERF are read by
+	 * individual system call, so delays may occur
+	 * between them.  If the time to read them
+	 * varies by a large amount, we re-read them.
+	 */
+
+	/*
+	 * This initial dummy APERF read has been seen to
+	 * reduce jitter in the subsequent reads.
+	 */
+
+	if (get_msr(cpu, MSR_IA32_APERF, &t->aperf))
+		return -3;
+
+retry:
+	t->tsc = rdtsc();	/* re-read close to APERF */
+
+	tsc_before = t->tsc;
+
+	if (get_msr(cpu, MSR_IA32_APERF, &t->aperf))
+		return -3;
+
+	tsc_between = rdtsc();
+
+	if (get_msr(cpu, MSR_IA32_MPERF, &t->mperf))
+		return -4;
+
+	tsc_after = rdtsc();
+
+	aperf_time = tsc_between - tsc_before;
+	mperf_time = tsc_after - tsc_between;
+
+	/*
+	 * If the system call latency to read APERF and MPERF
+	 * differ by more than 2x, then try again.
+	 */
+	if ((aperf_time > (2 * mperf_time)) || (mperf_time > (2 * aperf_time))) {
+		aperf_mperf_retry_count++;
+		if (aperf_mperf_retry_count < 5)
+			goto retry;
+		else
+			warnx("cpu%d jitter %lld %lld", cpu, aperf_time, mperf_time);
+	}
+	aperf_mperf_retry_count = 0;
+
+	t->aperf = t->aperf * aperf_mperf_multiplier;
+	t->mperf = t->mperf * aperf_mperf_multiplier;
+
+	return 0;
+}
+
+size_t rapl_counter_info_count_perf(const struct rapl_counter_info_t *rci)
+{
+	size_t ret = 0;
+
+	for (int i = 0; i < NUM_RAPL_COUNTERS; ++i)
+		if (rci->source[i] == RAPL_SOURCE_PERF)
+			++ret;
+
+	return ret;
+}
+
+void write_rapl_counter(struct rapl_counter *rc, struct rapl_counter_info_t *rci, unsigned int idx)
+{
+	rc->raw_value = rci->data[idx];
+	rc->unit = rci->unit[idx];
+	rc->scale = rci->scale[idx];
+}
+
+int get_rapl_counters(int cpu, int domain, struct core_data *c, struct pkg_data *p)
+{
+	unsigned long long perf_data[NUM_RAPL_COUNTERS + 1];
+	struct rapl_counter_info_t *rci = &rapl_counter_info_perdomain[domain];
+
+	if (debug)
+		fprintf(stderr, "%s: cpu%d domain%d\n", __func__, cpu, domain);
+
+	assert(rapl_counter_info_perdomain);
+
+	/*
+	 * If we have any perf counters to read, read them all now, in bulk
+	 */
+	if (rci->fd_perf != -1) {
+		size_t num_perf_counters = rapl_counter_info_count_perf(rci);
+		const ssize_t expected_read_size = (num_perf_counters + 1) * sizeof(unsigned long long);
+		const ssize_t actual_read_size = read(rci->fd_perf, &perf_data[0], sizeof(perf_data));
+
+		if (actual_read_size != expected_read_size)
+			err(-1, "%s: failed to read perf_data (%zu %zu)", __func__, expected_read_size,
+			    actual_read_size);
+	}
+
+	for (unsigned int i = 0, pi = 1; i < NUM_RAPL_COUNTERS; ++i) {
+		switch (rci->source[i]) {
+		case RAPL_SOURCE_NONE:
+			break;
+
+		case RAPL_SOURCE_PERF:
+			assert(pi < ARRAY_SIZE(perf_data));
+			assert(rci->fd_perf != -1);
+
+			if (debug)
+				fprintf(stderr, "Reading rapl counter via perf at %u (%llu %e %lf)\n",
+					i, perf_data[pi], rci->scale[i], perf_data[pi] * rci->scale[i]);
+
+			rci->data[i] = perf_data[pi];
+
+			++pi;
+			break;
+
+		case RAPL_SOURCE_MSR:
+			if (debug)
+				fprintf(stderr, "Reading rapl counter via msr at %u\n", i);
+
+			assert(!no_msr);
+			if (rci->flags[i] & RAPL_COUNTER_FLAG_USE_MSR_SUM) {
+				if (get_msr_sum(cpu, rci->msr[i], &rci->data[i]))
+					return -13 - i;
+			} else {
+				if (get_msr(cpu, rci->msr[i], &rci->data[i]))
+					return -13 - i;
+			}
+
+			rci->data[i] &= rci->msr_mask[i];
+			if (rci->msr_shift[i] >= 0)
+				rci->data[i] >>= abs(rci->msr_shift[i]);
+			else
+				rci->data[i] <<= abs(rci->msr_shift[i]);
+
+			break;
+		}
+	}
+
+	_Static_assert(NUM_RAPL_COUNTERS == 7);
+	write_rapl_counter(&p->energy_pkg, rci, RAPL_RCI_INDEX_ENERGY_PKG);
+	write_rapl_counter(&p->energy_cores, rci, RAPL_RCI_INDEX_ENERGY_CORES);
+	write_rapl_counter(&p->energy_dram, rci, RAPL_RCI_INDEX_DRAM);
+	write_rapl_counter(&p->energy_gfx, rci, RAPL_RCI_INDEX_GFX);
+	write_rapl_counter(&p->rapl_pkg_perf_status, rci, RAPL_RCI_INDEX_PKG_PERF_STATUS);
+	write_rapl_counter(&p->rapl_dram_perf_status, rci, RAPL_RCI_INDEX_DRAM_PERF_STATUS);
+	write_rapl_counter(&c->core_energy, rci, RAPL_RCI_INDEX_CORE_ENERGY);
+
+	return 0;
+}
+
 /*
  * get_counters(...)
  * migrate to cpu
@@ -2709,12 +3453,12 @@ int get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
 {
 	int cpu = t->cpu_id;
 	unsigned long long msr;
-	int aperf_mperf_retry_count = 0;
 	struct msr_counter *mp;
 	int i;
+	int status;
 
 	if (cpu_migrate(cpu)) {
-		fprintf(outf, "get_counters: Could not migrate to CPU %d\n", cpu);
+		fprintf(outf, "%s: Could not migrate to CPU %d\n", __func__, cpu);
 		return -1;
 	}
 
@@ -2722,63 +3466,26 @@ int get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
 
 	if (first_counter_read)
 		get_apic_id(t);
-retry:
+
 	t->tsc = rdtsc();	/* we are running on local CPU of interest */
 
 	if (DO_BIC(BIC_Avg_MHz) || DO_BIC(BIC_Busy) || DO_BIC(BIC_Bzy_MHz) || DO_BIC(BIC_IPC)
 	    || soft_c1_residency_display(BIC_Avg_MHz)) {
-		unsigned long long tsc_before, tsc_between, tsc_after, aperf_time, mperf_time;
-
-		/*
-		 * The TSC, APERF and MPERF must be read together for
-		 * APERF/MPERF and MPERF/TSC to give accurate results.
-		 *
-		 * Unfortunately, APERF and MPERF are read by
-		 * individual system call, so delays may occur
-		 * between them.  If the time to read them
-		 * varies by a large amount, we re-read them.
-		 */
-
-		/*
-		 * This initial dummy APERF read has been seen to
-		 * reduce jitter in the subsequent reads.
-		 */
-
-		if (get_msr(cpu, MSR_IA32_APERF, &t->aperf))
-			return -3;
-
-		t->tsc = rdtsc();	/* re-read close to APERF */
-
-		tsc_before = t->tsc;
+		int status = -1;
 
-		if (get_msr(cpu, MSR_IA32_APERF, &t->aperf))
-			return -3;
+		assert(!no_perf || !no_msr);
 
-		tsc_between = rdtsc();
-
-		if (get_msr(cpu, MSR_IA32_MPERF, &t->mperf))
-			return -4;
-
-		tsc_after = rdtsc();
-
-		aperf_time = tsc_between - tsc_before;
-		mperf_time = tsc_after - tsc_between;
-
-		/*
-		 * If the system call latency to read APERF and MPERF
-		 * differ by more than 2x, then try again.
-		 */
-		if ((aperf_time > (2 * mperf_time)) || (mperf_time > (2 * aperf_time))) {
-			aperf_mperf_retry_count++;
-			if (aperf_mperf_retry_count < 5)
-				goto retry;
-			else
-				warnx("cpu%d jitter %lld %lld", cpu, aperf_time, mperf_time);
+		switch (amperf_source) {
+		case AMPERF_SOURCE_PERF:
+			status = read_aperf_mperf_tsc_perf(t, cpu);
+			break;
+		case AMPERF_SOURCE_MSR:
+			status = read_aperf_mperf_tsc_msr(t, cpu);
+			break;
 		}
-		aperf_mperf_retry_count = 0;
 
-		t->aperf = t->aperf * aperf_mperf_multiplier;
-		t->mperf = t->mperf * aperf_mperf_multiplier;
+		if (status != 0)
+			return status;
 	}
 
 	if (DO_BIC(BIC_IPC))
@@ -2806,6 +3513,12 @@ retry:
 	if (!is_cpu_first_thread_in_core(t, c, p))
 		goto done;
 
+	if (platform->has_per_core_rapl) {
+		status = get_rapl_counters(cpu, c->core_id, c, p);
+		if (status != 0)
+			return status;
+	}
+
 	if (DO_BIC(BIC_CPU_c3) || soft_c1_residency_display(BIC_CPU_c3)) {
 		if (get_msr(cpu, MSR_CORE_C3_RESIDENCY, &c->c3))
 			return -6;
@@ -2846,12 +3559,6 @@ retry:
 	if (DO_BIC(BIC_CORE_THROT_CNT))
 		get_core_throt_cnt(cpu, &c->core_throt_cnt);
 
-	if (platform->rapl_msrs & RAPL_AMD_F17H) {
-		if (get_msr(cpu, MSR_CORE_ENERGY_STAT, &msr))
-			return -14;
-		c->core_energy = msr & 0xFFFFFFFF;
-	}
-
 	for (i = 0, mp = sys.cp; mp; i++, mp = mp->next) {
 		if (get_mp(cpu, mp, &c->counter[i]))
 			return -10;
@@ -2911,59 +3618,39 @@ retry:
 	if (DO_BIC(BIC_SYS_LPI))
 		p->sys_lpi = cpuidle_cur_sys_lpi_us;
 
-	if (platform->rapl_msrs & RAPL_PKG) {
-		if (get_msr_sum(cpu, MSR_PKG_ENERGY_STATUS, &msr))
-			return -13;
-		p->energy_pkg = msr;
-	}
-	if (platform->rapl_msrs & RAPL_CORE_ENERGY_STATUS) {
-		if (get_msr_sum(cpu, MSR_PP0_ENERGY_STATUS, &msr))
-			return -14;
-		p->energy_cores = msr;
-	}
-	if (platform->rapl_msrs & RAPL_DRAM) {
-		if (get_msr_sum(cpu, MSR_DRAM_ENERGY_STATUS, &msr))
-			return -15;
-		p->energy_dram = msr;
-	}
-	if (platform->rapl_msrs & RAPL_GFX) {
-		if (get_msr_sum(cpu, MSR_PP1_ENERGY_STATUS, &msr))
-			return -16;
-		p->energy_gfx = msr;
-	}
-	if (platform->rapl_msrs & RAPL_PKG_PERF_STATUS) {
-		if (get_msr_sum(cpu, MSR_PKG_PERF_STATUS, &msr))
-			return -16;
-		p->rapl_pkg_perf_status = msr;
-	}
-	if (platform->rapl_msrs & RAPL_DRAM_PERF_STATUS) {
-		if (get_msr_sum(cpu, MSR_DRAM_PERF_STATUS, &msr))
-			return -16;
-		p->rapl_dram_perf_status = msr;
-	}
-	if (platform->rapl_msrs & RAPL_AMD_F17H) {
-		if (get_msr_sum(cpu, MSR_PKG_ENERGY_STAT, &msr))
-			return -13;
-		p->energy_pkg = msr;
+	if (!platform->has_per_core_rapl) {
+		status = get_rapl_counters(cpu, p->package_id, c, p);
+		if (status != 0)
+			return status;
 	}
+
 	if (DO_BIC(BIC_PkgTmp)) {
 		if (get_msr(cpu, MSR_IA32_PACKAGE_THERM_STATUS, &msr))
 			return -17;
 		p->pkg_temp_c = tj_max - ((msr >> 16) & 0x7F);
 	}
 
-	if (DO_BIC(BIC_GFX_rc6))
-		p->gfx_rc6_ms = gfx_cur_rc6_ms;
-
 	/* n.b. assume die0 uncore frequency applies to whole package */
 	if (DO_BIC(BIC_UNCORE_MHZ))
 		p->uncore_mhz = get_uncore_mhz(p->package_id, 0);
 
+	if (DO_BIC(BIC_GFX_rc6))
+		p->gfx_rc6_ms = gfx_info[GFX_rc6].val_ull;
+
 	if (DO_BIC(BIC_GFXMHz))
-		p->gfx_mhz = gfx_cur_mhz;
+		p->gfx_mhz = gfx_info[GFX_MHz].val;
 
 	if (DO_BIC(BIC_GFXACTMHz))
-		p->gfx_act_mhz = gfx_act_mhz;
+		p->gfx_act_mhz = gfx_info[GFX_ACTMHz].val;
+
+	if (DO_BIC(BIC_SAM_mc6))
+		p->sam_mc6_ms = gfx_info[SAM_mc6].val_ull;
+
+	if (DO_BIC(BIC_SAMMHz))
+		p->sam_mhz = gfx_info[SAM_MHz].val;
+
+	if (DO_BIC(BIC_SAMACTMHz))
+		p->sam_act_mhz = gfx_info[SAM_ACTMHz].val;
 
 	for (i = 0, mp = sys.pp; mp; i++, mp = mp->next) {
 		if (get_mp(cpu, mp, &p->counter[i]))
@@ -3053,7 +3740,7 @@ void probe_cst_limit(void)
 	unsigned long long msr;
 	int *pkg_cstate_limits;
 
-	if (!platform->has_nhm_msrs)
+	if (!platform->has_nhm_msrs || no_msr)
 		return;
 
 	switch (platform->cst_limit) {
@@ -3097,7 +3784,7 @@ static void dump_platform_info(void)
 	unsigned long long msr;
 	unsigned int ratio;
 
-	if (!platform->has_nhm_msrs)
+	if (!platform->has_nhm_msrs || no_msr)
 		return;
 
 	get_msr(base_cpu, MSR_PLATFORM_INFO, &msr);
@@ -3115,7 +3802,7 @@ static void dump_power_ctl(void)
 {
 	unsigned long long msr;
 
-	if (!platform->has_nhm_msrs)
+	if (!platform->has_nhm_msrs || no_msr)
 		return;
 
 	get_msr(base_cpu, MSR_IA32_POWER_CTL, &msr);
@@ -3321,7 +4008,7 @@ static void dump_cst_cfg(void)
 {
 	unsigned long long msr;
 
-	if (!platform->has_nhm_msrs)
+	if (!platform->has_nhm_msrs || no_msr)
 		return;
 
 	get_msr(base_cpu, MSR_PKG_CST_CONFIG_CONTROL, &msr);
@@ -3393,7 +4080,7 @@ void print_irtl(void)
 {
 	unsigned long long msr;
 
-	if (!platform->has_irtl_msrs)
+	if (!platform->has_irtl_msrs || no_msr)
 		return;
 
 	if (platform->supported_cstates & PC3) {
@@ -3443,12 +4130,64 @@ void free_fd_percpu(void)
 {
 	int i;
 
+	if (!fd_percpu)
+		return;
+
 	for (i = 0; i < topo.max_cpu_num + 1; ++i) {
 		if (fd_percpu[i] != 0)
 			close(fd_percpu[i]);
 	}
 
 	free(fd_percpu);
+	fd_percpu = NULL;
+}
+
+void free_fd_amperf_percpu(void)
+{
+	int i;
+
+	if (!fd_amperf_percpu)
+		return;
+
+	for (i = 0; i < topo.max_cpu_num + 1; ++i) {
+		if (fd_amperf_percpu[i].mperf != 0)
+			close(fd_amperf_percpu[i].mperf);
+
+		if (fd_amperf_percpu[i].aperf != 0)
+			close(fd_amperf_percpu[i].aperf);
+	}
+
+	free(fd_amperf_percpu);
+	fd_amperf_percpu = NULL;
+}
+
+void free_fd_instr_count_percpu(void)
+{
+	if (!fd_instr_count_percpu)
+		return;
+
+	for (int i = 0; i < topo.max_cpu_num + 1; ++i) {
+		if (fd_instr_count_percpu[i] != 0)
+			close(fd_instr_count_percpu[i]);
+	}
+
+	free(fd_instr_count_percpu);
+	fd_instr_count_percpu = NULL;
+}
+
+void free_fd_rapl_percpu(void)
+{
+	if (!rapl_counter_info_perdomain)
+		return;
+
+	const int num_domains = platform->has_per_core_rapl ? topo.num_cores : topo.num_packages;
+
+	for (int domain_id = 0; domain_id < num_domains; ++domain_id) {
+		if (rapl_counter_info_perdomain[domain_id].fd_perf != -1)
+			close(rapl_counter_info_perdomain[domain_id].fd_perf);
+	}
+
+	free(rapl_counter_info_perdomain);
 }
 
 void free_all_buffers(void)
@@ -3492,6 +4231,9 @@ void free_all_buffers(void)
 	outp = NULL;
 
 	free_fd_percpu();
+	free_fd_instr_count_percpu();
+	free_fd_amperf_percpu();
+	free_fd_rapl_percpu();
 
 	free(irq_column_2_cpu);
 	free(irqs_per_cpu);
@@ -3825,11 +4567,17 @@ static void update_effective_set(bool startup)
 		err(1, "%s: cpu str malformat %s\n", PATH_EFFECTIVE_CPUS, cpu_effective_str);
 }
 
+void linux_perf_init(void);
+void rapl_perf_init(void);
+
 void re_initialize(void)
 {
 	free_all_buffers();
 	setup_all_buffers(false);
-	fprintf(outf, "turbostat: re-initialized with num_cpus %d, allowed_cpus %d\n", topo.num_cpus, topo.allowed_cpus);
+	linux_perf_init();
+	rapl_perf_init();
+	fprintf(outf, "turbostat: re-initialized with num_cpus %d, allowed_cpus %d\n", topo.num_cpus,
+		topo.allowed_cpus);
 }
 
 void set_max_cpu_num(void)
@@ -3940,85 +4688,43 @@ int snapshot_proc_interrupts(void)
 }
 
 /*
- * snapshot_gfx_rc6_ms()
+ * snapshot_graphics()
  *
- * record snapshot of
- * /sys/class/drm/card0/power/rc6_residency_ms
+ * record snapshot of specified graphics sysfs knob
  *
  * return 1 if config change requires a restart, else return 0
  */
-int snapshot_gfx_rc6_ms(void)
+int snapshot_graphics(int idx)
 {
 	FILE *fp;
 	int retval;
 
-	fp = fopen_or_die("/sys/class/drm/card0/power/rc6_residency_ms", "r");
-
-	retval = fscanf(fp, "%lld", &gfx_cur_rc6_ms);
-	if (retval != 1)
-		err(1, "GFX rc6");
-
-	fclose(fp);
-
-	return 0;
-}
-
-/*
- * snapshot_gfx_mhz()
- *
- * fall back to /sys/class/graphics/fb0/device/drm/card0/gt_cur_freq_mhz
- * when /sys/class/drm/card0/gt_cur_freq_mhz is not available.
- *
- * return 1 if config change requires a restart, else return 0
- */
-int snapshot_gfx_mhz(void)
-{
-	static FILE *fp;
-	int retval;
-
-	if (fp == NULL) {
-		fp = fopen("/sys/class/drm/card0/gt_cur_freq_mhz", "r");
-		if (!fp)
-			fp = fopen_or_die("/sys/class/graphics/fb0/device/drm/card0/gt_cur_freq_mhz", "r");
-	} else {
-		rewind(fp);
-		fflush(fp);
-	}
-
-	retval = fscanf(fp, "%d", &gfx_cur_mhz);
-	if (retval != 1)
-		err(1, "GFX MHz");
-
-	return 0;
-}
-
-/*
- * snapshot_gfx_cur_mhz()
- *
- * fall back to /sys/class/graphics/fb0/device/drm/card0/gt_act_freq_mhz
- * when /sys/class/drm/card0/gt_act_freq_mhz is not available.
- *
- * return 1 if config change requires a restart, else return 0
- */
-int snapshot_gfx_act_mhz(void)
-{
-	static FILE *fp;
-	int retval;
-
-	if (fp == NULL) {
-		fp = fopen("/sys/class/drm/card0/gt_act_freq_mhz", "r");
-		if (!fp)
-			fp = fopen_or_die("/sys/class/graphics/fb0/device/drm/card0/gt_act_freq_mhz", "r");
-	} else {
-		rewind(fp);
-		fflush(fp);
+	switch (idx) {
+	case GFX_rc6:
+	case SAM_mc6:
+		fp = fopen_or_die(gfx_info[idx].path, "r");
+		retval = fscanf(fp, "%lld", &gfx_info[idx].val_ull);
+		if (retval != 1)
+			err(1, "rc6");
+		fclose(fp);
+		return 0;
+	case GFX_MHz:
+	case GFX_ACTMHz:
+	case SAM_MHz:
+	case SAM_ACTMHz:
+		if (gfx_info[idx].fp == NULL) {
+			gfx_info[idx].fp = fopen_or_die(gfx_info[idx].path, "r");
+		} else {
+			rewind(gfx_info[idx].fp);
+			fflush(gfx_info[idx].fp);
+		}
+		retval = fscanf(gfx_info[idx].fp, "%d", &gfx_info[idx].val);
+		if (retval != 1)
+			err(1, "MHz");
+		return 0;
+	default:
+		return -EINVAL;
 	}
-
-	retval = fscanf(fp, "%d", &gfx_act_mhz);
-	if (retval != 1)
-		err(1, "GFX ACT MHz");
-
-	return 0;
 }
 
 /*
@@ -4083,13 +4789,22 @@ int snapshot_proc_sysfs_files(void)
 			return 1;
 
 	if (DO_BIC(BIC_GFX_rc6))
-		snapshot_gfx_rc6_ms();
+		snapshot_graphics(GFX_rc6);
 
 	if (DO_BIC(BIC_GFXMHz))
-		snapshot_gfx_mhz();
+		snapshot_graphics(GFX_MHz);
 
 	if (DO_BIC(BIC_GFXACTMHz))
-		snapshot_gfx_act_mhz();
+		snapshot_graphics(GFX_ACTMHz);
+
+	if (DO_BIC(BIC_SAM_mc6))
+		snapshot_graphics(SAM_mc6);
+
+	if (DO_BIC(BIC_SAMMHz))
+		snapshot_graphics(SAM_MHz);
+
+	if (DO_BIC(BIC_SAMACTMHz))
+		snapshot_graphics(SAM_ACTMHz);
 
 	if (DO_BIC(BIC_CPU_LPI))
 		snapshot_cpu_lpi_us();
@@ -4173,6 +4888,8 @@ int get_msr_sum(int cpu, off_t offset, unsigned long long *msr)
 	int ret, idx;
 	unsigned long long msr_cur, msr_last;
 
+	assert(!no_msr);
+
 	if (!per_cpu_msr_sum)
 		return 1;
 
@@ -4201,6 +4918,8 @@ static int update_msr_sum(struct thread_data *t, struct core_data *c, struct pkg
 	UNUSED(c);
 	UNUSED(p);
 
+	assert(!no_msr);
+
 	for (i = IDX_PKG_ENERGY; i < IDX_COUNT; i++) {
 		unsigned long long msr_cur, msr_last;
 		off_t offset;
@@ -4280,7 +4999,8 @@ release_msr:
 
 /*
  * set_my_sched_priority(pri)
- * return previous
+ * return previous priority on success
+ * return value < -20 on failure
  */
 int set_my_sched_priority(int priority)
 {
@@ -4290,16 +5010,16 @@ int set_my_sched_priority(int priority)
 	errno = 0;
 	original_priority = getpriority(PRIO_PROCESS, 0);
 	if (errno && (original_priority == -1))
-		err(errno, "getpriority");
+		return -21;
 
 	retval = setpriority(PRIO_PROCESS, 0, priority);
 	if (retval)
-		errx(retval, "capget(CAP_SYS_NICE) failed,try \"# setcap cap_sys_nice=ep %s\"", progname);
+		return -21;
 
 	errno = 0;
 	retval = getpriority(PRIO_PROCESS, 0);
 	if (retval != priority)
-		err(retval, "getpriority(%d) != setpriority(%d)", retval, priority);
+		return -21;
 
 	return original_priority;
 }
@@ -4314,6 +5034,9 @@ void turbostat_loop()
 
 	/*
 	 * elevate own priority for interval mode
+	 *
+	 * ignore on error - we probably don't have permission to set it, but
+	 * it's not a big deal
 	 */
 	set_my_sched_priority(-20);
 
@@ -4399,10 +5122,13 @@ void check_dev_msr()
 	struct stat sb;
 	char pathname[32];
 
+	if (no_msr)
+		return;
+
 	sprintf(pathname, "/dev/cpu/%d/msr", base_cpu);
 	if (stat(pathname, &sb))
 		if (system("/sbin/modprobe msr > /dev/null 2>&1"))
-			err(-5, "no /dev/cpu/0/msr, Try \"# modprobe msr\" ");
+			no_msr = 1;
 }
 
 /*
@@ -4414,47 +5140,51 @@ int check_for_cap_sys_rawio(void)
 {
 	cap_t caps;
 	cap_flag_value_t cap_flag_value;
+	int ret = 0;
 
 	caps = cap_get_proc();
 	if (caps == NULL)
-		err(-6, "cap_get_proc\n");
+		return 1;
 
-	if (cap_get_flag(caps, CAP_SYS_RAWIO, CAP_EFFECTIVE, &cap_flag_value))
-		err(-6, "cap_get\n");
+	if (cap_get_flag(caps, CAP_SYS_RAWIO, CAP_EFFECTIVE, &cap_flag_value)) {
+		ret = 1;
+		goto free_and_exit;
+	}
 
 	if (cap_flag_value != CAP_SET) {
-		warnx("capget(CAP_SYS_RAWIO) failed," " try \"# setcap cap_sys_rawio=ep %s\"", progname);
-		return 1;
+		ret = 1;
+		goto free_and_exit;
 	}
 
+free_and_exit:
 	if (cap_free(caps) == -1)
 		err(-6, "cap_free\n");
 
-	return 0;
+	return ret;
 }
 
-void check_permissions(void)
+void check_msr_permission(void)
 {
-	int do_exit = 0;
+	int failed = 0;
 	char pathname[32];
 
+	if (no_msr)
+		return;
+
 	/* check for CAP_SYS_RAWIO */
-	do_exit += check_for_cap_sys_rawio();
+	failed += check_for_cap_sys_rawio();
 
 	/* test file permissions */
 	sprintf(pathname, "/dev/cpu/%d/msr", base_cpu);
 	if (euidaccess(pathname, R_OK)) {
-		do_exit++;
-		warn("/dev/cpu/0/msr open failed, try chown or chmod +r /dev/cpu/*/msr");
+		failed++;
 	}
 
-	/* if all else fails, thell them to be root */
-	if (do_exit)
-		if (getuid() != 0)
-			warnx("... or simply run as root");
-
-	if (do_exit)
-		exit(-6);
+	if (failed) {
+		warnx("Failed to access %s. Some of the counters may not be available\n"
+		      "\tRun as root to enable them or use %s to disable the access explicitly", pathname, "--no-msr");
+		no_msr = 1;
+	}
 }
 
 void probe_bclk(void)
@@ -4462,7 +5192,7 @@ void probe_bclk(void)
 	unsigned long long msr;
 	unsigned int base_ratio;
 
-	if (!platform->has_nhm_msrs)
+	if (!platform->has_nhm_msrs || no_msr)
 		return;
 
 	if (platform->bclk_freq == BCLK_100MHZ)
@@ -4502,7 +5232,7 @@ static void dump_turbo_ratio_info(void)
 	if (!has_turbo)
 		return;
 
-	if (!platform->has_nhm_msrs)
+	if (!platform->has_nhm_msrs || no_msr)
 		return;
 
 	if (platform->trl_msrs & TRL_LIMIT2)
@@ -4567,20 +5297,15 @@ static void dump_sysfs_file(char *path)
 static void probe_intel_uncore_frequency(void)
 {
 	int i, j;
-	char path[128];
+	char path[256];
 
 	if (!genuine_intel)
 		return;
 
-	if (access("/sys/devices/system/cpu/intel_uncore_frequency/package_00_die_00", R_OK))
-		return;
-
-	/* Cluster level sysfs not supported yet. */
-	if (!access("/sys/devices/system/cpu/intel_uncore_frequency/uncore00", R_OK))
-		return;
+	if (access("/sys/devices/system/cpu/intel_uncore_frequency/package_00_die_00/current_freq_khz", R_OK))
+		goto probe_cluster;
 
-	if (!access("/sys/devices/system/cpu/intel_uncore_frequency/package_00_die_00/current_freq_khz", R_OK))
-		BIC_PRESENT(BIC_UNCORE_MHZ);
+	BIC_PRESENT(BIC_UNCORE_MHZ);
 
 	if (quiet)
 		return;
@@ -4588,40 +5313,178 @@ static void probe_intel_uncore_frequency(void)
 	for (i = 0; i < topo.num_packages; ++i) {
 		for (j = 0; j < topo.num_die; ++j) {
 			int k, l;
+			char path_base[128];
+
+			sprintf(path_base, "/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d", i,
+				j);
 
-			sprintf(path, "/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/min_freq_khz",
-				i, j);
+			sprintf(path, "%s/min_freq_khz", path_base);
 			k = read_sysfs_int(path);
-			sprintf(path, "/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/max_freq_khz",
-				i, j);
+			sprintf(path, "%s/max_freq_khz", path_base);
 			l = read_sysfs_int(path);
-			fprintf(outf, "Uncore Frequency pkg%d die%d: %d - %d MHz ", i, j, k / 1000, l / 1000);
+			fprintf(outf, "Uncore Frequency package%d die%d: %d - %d MHz ", i, j, k / 1000, l / 1000);
 
-			sprintf(path,
-				"/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/initial_min_freq_khz",
-				i, j);
+			sprintf(path, "%s/initial_min_freq_khz", path_base);
 			k = read_sysfs_int(path);
-			sprintf(path,
-				"/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/initial_max_freq_khz",
-				i, j);
+			sprintf(path, "%s/initial_max_freq_khz", path_base);
 			l = read_sysfs_int(path);
-			fprintf(outf, "(%d - %d MHz)\n", k / 1000, l / 1000);
+			fprintf(outf, "(%d - %d MHz)", k / 1000, l / 1000);
+
+			sprintf(path, "%s/current_freq_khz", path_base);
+			k = read_sysfs_int(path);
+			fprintf(outf, " %d MHz\n", k / 1000);
 		}
 	}
+	return;
+
+probe_cluster:
+	if (access("/sys/devices/system/cpu/intel_uncore_frequency/uncore00/current_freq_khz", R_OK))
+		return;
+
+	if (quiet)
+		return;
+
+	for (i = 0;; ++i) {
+		int k, l;
+		char path_base[128];
+		int package_id, domain_id, cluster_id;
+
+		sprintf(path_base, "/sys/devices/system/cpu/intel_uncore_frequency/uncore%02d", i);
+
+		if (access(path_base, R_OK))
+			break;
+
+		sprintf(path, "%s/package_id", path_base);
+		package_id = read_sysfs_int(path);
+
+		sprintf(path, "%s/domain_id", path_base);
+		domain_id = read_sysfs_int(path);
+
+		sprintf(path, "%s/fabric_cluster_id", path_base);
+		cluster_id = read_sysfs_int(path);
+
+		sprintf(path, "%s/min_freq_khz", path_base);
+		k = read_sysfs_int(path);
+		sprintf(path, "%s/max_freq_khz", path_base);
+		l = read_sysfs_int(path);
+		fprintf(outf, "Uncore Frequency package%d domain%d cluster%d: %d - %d MHz ", package_id, domain_id,
+			cluster_id, k / 1000, l / 1000);
+
+		sprintf(path, "%s/initial_min_freq_khz", path_base);
+		k = read_sysfs_int(path);
+		sprintf(path, "%s/initial_max_freq_khz", path_base);
+		l = read_sysfs_int(path);
+		fprintf(outf, "(%d - %d MHz)", k / 1000, l / 1000);
+
+		sprintf(path, "%s/current_freq_khz", path_base);
+		k = read_sysfs_int(path);
+		fprintf(outf, " %d MHz\n", k / 1000);
+	}
 }
 
 static void probe_graphics(void)
 {
+	/* Xe graphics sysfs knobs */
+	if (!access("/sys/class/drm/card0/device/tile0/gt0/gtidle/idle_residency_ms", R_OK)) {
+		FILE *fp;
+		char buf[8];
+		bool gt0_is_gt;
+		int idx;
+
+		fp = fopen("/sys/class/drm/card0/device/tile0/gt0/gtidle/name", "r");
+		if (!fp)
+			goto next;
+
+		if (!fread(buf, sizeof(char), 7, fp)) {
+			fclose(fp);
+			goto next;
+		}
+		fclose(fp);
+
+		if (!strncmp(buf, "gt0-rc", strlen("gt0-rc")))
+			gt0_is_gt = true;
+		else if (!strncmp(buf, "gt0-mc", strlen("gt0-mc")))
+			gt0_is_gt = false;
+		else
+			goto next;
+
+		idx = gt0_is_gt ? GFX_rc6 : SAM_mc6;
+		gfx_info[idx].path = "/sys/class/drm/card0/device/tile0/gt0/gtidle/idle_residency_ms";
+
+		idx = gt0_is_gt ? GFX_MHz : SAM_MHz;
+		if (!access("/sys/class/drm/card0/device/tile0/gt0/freq0/cur_freq", R_OK))
+			gfx_info[idx].path = "/sys/class/drm/card0/device/tile0/gt0/freq0/cur_freq";
+
+		idx = gt0_is_gt ? GFX_ACTMHz : SAM_ACTMHz;
+		if (!access("/sys/class/drm/card0/device/tile0/gt0/freq0/act_freq", R_OK))
+			gfx_info[idx].path = "/sys/class/drm/card0/device/tile0/gt0/freq0/act_freq";
+
+		idx = gt0_is_gt ? SAM_mc6 : GFX_rc6;
+		if (!access("/sys/class/drm/card0/device/tile0/gt1/gtidle/idle_residency_ms", R_OK))
+			gfx_info[idx].path = "/sys/class/drm/card0/device/tile0/gt1/gtidle/idle_residency_ms";
+
+		idx = gt0_is_gt ? SAM_MHz : GFX_MHz;
+		if (!access("/sys/class/drm/card0/device/tile0/gt1/freq0/cur_freq", R_OK))
+			gfx_info[idx].path = "/sys/class/drm/card0/device/tile0/gt1/freq0/cur_freq";
+
+		idx = gt0_is_gt ? SAM_ACTMHz : GFX_ACTMHz;
+		if (!access("/sys/class/drm/card0/device/tile0/gt1/freq0/act_freq", R_OK))
+			gfx_info[idx].path = "/sys/class/drm/card0/device/tile0/gt1/freq0/act_freq";
+
+		goto end;
+	}
+
+next:
+	/* New i915 graphics sysfs knobs */
+	if (!access("/sys/class/drm/card0/gt/gt0/rc6_residency_ms", R_OK)) {
+		gfx_info[GFX_rc6].path = "/sys/class/drm/card0/gt/gt0/rc6_residency_ms";
+
+		if (!access("/sys/class/drm/card0/gt/gt0/rps_cur_freq_mhz", R_OK))
+			gfx_info[GFX_MHz].path = "/sys/class/drm/card0/gt/gt0/rps_cur_freq_mhz";
+
+		if (!access("/sys/class/drm/card0/gt/gt0/rps_act_freq_mhz", R_OK))
+			gfx_info[GFX_ACTMHz].path = "/sys/class/drm/card0/gt/gt0/rps_act_freq_mhz";
+
+		if (!access("/sys/class/drm/card0/gt/gt1/rc6_residency_ms", R_OK))
+			gfx_info[SAM_mc6].path = "/sys/class/drm/card0/gt/gt1/rc6_residency_ms";
+
+		if (!access("/sys/class/drm/card0/gt/gt1/rps_cur_freq_mhz", R_OK))
+			gfx_info[SAM_MHz].path = "/sys/class/drm/card0/gt/gt1/rps_cur_freq_mhz";
+
+		if (!access("/sys/class/drm/card0/gt/gt1/rps_act_freq_mhz", R_OK))
+			gfx_info[SAM_ACTMHz].path = "/sys/class/drm/card0/gt/gt1/rps_act_freq_mhz";
+
+		goto end;
+	}
+
+	/* Fall back to traditional i915 graphics sysfs knobs */
 	if (!access("/sys/class/drm/card0/power/rc6_residency_ms", R_OK))
-		BIC_PRESENT(BIC_GFX_rc6);
+		gfx_info[GFX_rc6].path = "/sys/class/drm/card0/power/rc6_residency_ms";
+
+	if (!access("/sys/class/drm/card0/gt_cur_freq_mhz", R_OK))
+		gfx_info[GFX_MHz].path = "/sys/class/drm/card0/gt_cur_freq_mhz";
+	else if (!access("/sys/class/graphics/fb0/device/drm/card0/gt_cur_freq_mhz", R_OK))
+		gfx_info[GFX_MHz].path = "/sys/class/graphics/fb0/device/drm/card0/gt_cur_freq_mhz";
 
-	if (!access("/sys/class/drm/card0/gt_cur_freq_mhz", R_OK) ||
-	    !access("/sys/class/graphics/fb0/device/drm/card0/gt_cur_freq_mhz", R_OK))
-		BIC_PRESENT(BIC_GFXMHz);
 
-	if (!access("/sys/class/drm/card0/gt_act_freq_mhz", R_OK) ||
-	    !access("/sys/class/graphics/fb0/device/drm/card0/gt_act_freq_mhz", R_OK))
+	if (!access("/sys/class/drm/card0/gt_act_freq_mhz", R_OK))
+		gfx_info[GFX_ACTMHz].path = "/sys/class/drm/card0/gt_act_freq_mhz";
+	else if (!access("/sys/class/graphics/fb0/device/drm/card0/gt_act_freq_mhz", R_OK))
+		gfx_info[GFX_ACTMHz].path = "/sys/class/graphics/fb0/device/drm/card0/gt_act_freq_mhz";
+
+end:
+	if (gfx_info[GFX_rc6].path)
+		BIC_PRESENT(BIC_GFX_rc6);
+	if (gfx_info[GFX_MHz].path)
+		BIC_PRESENT(BIC_GFXMHz);
+	if (gfx_info[GFX_ACTMHz].path)
 		BIC_PRESENT(BIC_GFXACTMHz);
+	if (gfx_info[SAM_mc6].path)
+		BIC_PRESENT(BIC_SAM_mc6);
+	if (gfx_info[SAM_MHz].path)
+		BIC_PRESENT(BIC_SAMMHz);
+	if (gfx_info[SAM_ACTMHz].path)
+		BIC_PRESENT(BIC_SAMACTMHz);
 }
 
 static void dump_sysfs_cstate_config(void)
@@ -4783,6 +5646,9 @@ int print_hwp(struct thread_data *t, struct core_data *c, struct pkg_data *p)
 	UNUSED(c);
 	UNUSED(p);
 
+	if (no_msr)
+		return 0;
+
 	if (!has_hwp)
 		return 0;
 
@@ -4869,6 +5735,9 @@ int print_perf_limit(struct thread_data *t, struct core_data *c, struct pkg_data
 	UNUSED(c);
 	UNUSED(p);
 
+	if (no_msr)
+		return 0;
+
 	cpu = t->cpu_id;
 
 	/* per-package */
@@ -4983,31 +5852,18 @@ void rapl_probe_intel(void)
 	unsigned long long msr;
 	unsigned int time_unit;
 	double tdp;
+	const unsigned long long bic_watt_bits = BIC_PkgWatt | BIC_CorWatt | BIC_RAMWatt | BIC_GFXWatt;
+	const unsigned long long bic_joules_bits = BIC_Pkg_J | BIC_Cor_J | BIC_RAM_J | BIC_GFX_J;
 
-	if (rapl_joules) {
-		if (platform->rapl_msrs & RAPL_PKG_ENERGY_STATUS)
-			BIC_PRESENT(BIC_Pkg_J);
-		if (platform->rapl_msrs & RAPL_CORE_ENERGY_STATUS)
-			BIC_PRESENT(BIC_Cor_J);
-		if (platform->rapl_msrs & RAPL_DRAM_ENERGY_STATUS)
-			BIC_PRESENT(BIC_RAM_J);
-		if (platform->rapl_msrs & RAPL_GFX_ENERGY_STATUS)
-			BIC_PRESENT(BIC_GFX_J);
-	} else {
-		if (platform->rapl_msrs & RAPL_PKG_ENERGY_STATUS)
-			BIC_PRESENT(BIC_PkgWatt);
-		if (platform->rapl_msrs & RAPL_CORE_ENERGY_STATUS)
-			BIC_PRESENT(BIC_CorWatt);
-		if (platform->rapl_msrs & RAPL_DRAM_ENERGY_STATUS)
-			BIC_PRESENT(BIC_RAMWatt);
-		if (platform->rapl_msrs & RAPL_GFX_ENERGY_STATUS)
-			BIC_PRESENT(BIC_GFXWatt);
-	}
+	if (rapl_joules)
+		bic_enabled &= ~bic_watt_bits;
+	else
+		bic_enabled &= ~bic_joules_bits;
 
-	if (platform->rapl_msrs & RAPL_PKG_PERF_STATUS)
-		BIC_PRESENT(BIC_PKG__);
-	if (platform->rapl_msrs & RAPL_DRAM_PERF_STATUS)
-		BIC_PRESENT(BIC_RAM__);
+	if (!(platform->rapl_msrs & RAPL_PKG_PERF_STATUS))
+		bic_enabled &= ~BIC_PKG__;
+	if (!(platform->rapl_msrs & RAPL_DRAM_PERF_STATUS))
+		bic_enabled &= ~BIC_RAM__;
 
 	/* units on package 0, verify later other packages match */
 	if (get_msr(base_cpu, MSR_RAPL_POWER_UNIT, &msr))
@@ -5041,14 +5897,13 @@ void rapl_probe_amd(void)
 {
 	unsigned long long msr;
 	double tdp;
+	const unsigned long long bic_watt_bits = BIC_PkgWatt | BIC_CorWatt;
+	const unsigned long long bic_joules_bits = BIC_Pkg_J | BIC_Cor_J;
 
-	if (rapl_joules) {
-		BIC_PRESENT(BIC_Pkg_J);
-		BIC_PRESENT(BIC_Cor_J);
-	} else {
-		BIC_PRESENT(BIC_PkgWatt);
-		BIC_PRESENT(BIC_CorWatt);
-	}
+	if (rapl_joules)
+		bic_enabled &= ~bic_watt_bits;
+	else
+		bic_enabled &= ~bic_joules_bits;
 
 	if (get_msr(base_cpu, MSR_RAPL_PWR_UNIT, &msr))
 		return;
@@ -5202,7 +6057,7 @@ int print_rapl(struct thread_data *t, struct core_data *c, struct pkg_data *p)
  */
 void probe_rapl(void)
 {
-	if (!platform->rapl_msrs)
+	if (!platform->rapl_msrs || no_msr)
 		return;
 
 	if (genuine_intel)
@@ -5258,7 +6113,7 @@ int set_temperature_target(struct thread_data *t, struct core_data *c, struct pk
 	}
 
 	/* Temperature Target MSR is Nehalem and newer only */
-	if (!platform->has_nhm_msrs)
+	if (!platform->has_nhm_msrs || no_msr)
 		goto guess;
 
 	if (get_msr(base_cpu, MSR_IA32_TEMPERATURE_TARGET, &msr))
@@ -5305,6 +6160,9 @@ int print_thermal(struct thread_data *t, struct core_data *c, struct pkg_data *p
 	UNUSED(c);
 	UNUSED(p);
 
+	if (no_msr)
+		return 0;
+
 	if (!(do_dts || do_ptm))
 		return 0;
 
@@ -5402,6 +6260,9 @@ void decode_feature_control_msr(void)
 {
 	unsigned long long msr;
 
+	if (no_msr)
+		return;
+
 	if (!get_msr(base_cpu, MSR_IA32_FEAT_CTL, &msr))
 		fprintf(outf, "cpu%d: MSR_IA32_FEATURE_CONTROL: 0x%08llx (%sLocked %s)\n",
 			base_cpu, msr, msr & FEAT_CTL_LOCKED ? "" : "UN-", msr & (1 << 18) ? "SGX" : "");
@@ -5411,6 +6272,9 @@ void decode_misc_enable_msr(void)
 {
 	unsigned long long msr;
 
+	if (no_msr)
+		return;
+
 	if (!genuine_intel)
 		return;
 
@@ -5428,6 +6292,9 @@ void decode_misc_feature_control(void)
 {
 	unsigned long long msr;
 
+	if (no_msr)
+		return;
+
 	if (!platform->has_msr_misc_feature_control)
 		return;
 
@@ -5449,6 +6316,9 @@ void decode_misc_pwr_mgmt_msr(void)
 {
 	unsigned long long msr;
 
+	if (no_msr)
+		return;
+
 	if (!platform->has_msr_misc_pwr_mgmt)
 		return;
 
@@ -5468,6 +6338,9 @@ void decode_c6_demotion_policy_msr(void)
 {
 	unsigned long long msr;
 
+	if (no_msr)
+		return;
+
 	if (!platform->has_msr_c6_demotion_policy_config)
 		return;
 
@@ -5489,7 +6362,8 @@ void print_dev_latency(void)
 
 	fd = open(path, O_RDONLY);
 	if (fd < 0) {
-		warnx("capget(CAP_SYS_ADMIN) failed, try \"# setcap cap_sys_admin=ep %s\"", progname);
+		if (debug)
+			warnx("Read %s failed", path);
 		return;
 	}
 
@@ -5504,23 +6378,260 @@ void print_dev_latency(void)
 	close(fd);
 }
 
+static int has_instr_count_access(void)
+{
+	int fd;
+	int has_access;
+
+	if (no_perf)
+		return 0;
+
+	fd = open_perf_counter(base_cpu, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS, -1, 0);
+	has_access = fd != -1;
+
+	if (fd != -1)
+		close(fd);
+
+	if (!has_access)
+		warnx("Failed to access %s. Some of the counters may not be available\n"
+		      "\tRun as root to enable them or use %s to disable the access explicitly",
+		      "instructions retired perf counter", "--no-perf");
+
+	return has_access;
+}
+
+bool is_aperf_access_required(void)
+{
+	return BIC_IS_ENABLED(BIC_Avg_MHz)
+	    || BIC_IS_ENABLED(BIC_Busy)
+	    || BIC_IS_ENABLED(BIC_Bzy_MHz)
+	    || BIC_IS_ENABLED(BIC_IPC);
+}
+
+int add_rapl_perf_counter_(int cpu, struct rapl_counter_info_t *rci, const struct rapl_counter_arch_info *cai,
+			   double *scale_, enum rapl_unit *unit_)
+{
+	if (no_perf)
+		return -1;
+
+	const double scale = read_perf_rapl_scale(cai->perf_subsys, cai->perf_name);
+
+	if (scale == 0.0)
+		return -1;
+
+	const enum rapl_unit unit = read_perf_rapl_unit(cai->perf_subsys, cai->perf_name);
+
+	if (unit == RAPL_UNIT_INVALID)
+		return -1;
+
+	const unsigned int rapl_type = read_perf_type(cai->perf_subsys);
+	const unsigned int rapl_energy_pkg_config = read_rapl_config(cai->perf_subsys, cai->perf_name);
+
+	const int fd_counter =
+	    open_perf_counter(cpu, rapl_type, rapl_energy_pkg_config, rci->fd_perf, PERF_FORMAT_GROUP);
+	if (fd_counter == -1)
+		return -1;
+
+	/* If it's the first counter opened, make it a group descriptor */
+	if (rci->fd_perf == -1)
+		rci->fd_perf = fd_counter;
+
+	*scale_ = scale;
+	*unit_ = unit;
+	return fd_counter;
+}
+
+int add_rapl_perf_counter(int cpu, struct rapl_counter_info_t *rci, const struct rapl_counter_arch_info *cai,
+			  double *scale, enum rapl_unit *unit)
+{
+	int ret = add_rapl_perf_counter_(cpu, rci, cai, scale, unit);
+
+	if (debug)
+		fprintf(stderr, "%s: %d (cpu: %d)\n", __func__, ret, cpu);
+
+	return ret;
+}
+
 /*
  * Linux-perf manages the HW instructions-retired counter
  * by enabling when requested, and hiding rollover
  */
 void linux_perf_init(void)
 {
-	if (!BIC_IS_ENABLED(BIC_IPC))
-		return;
-
 	if (access("/proc/sys/kernel/perf_event_paranoid", F_OK))
 		return;
 
-	fd_instr_count_percpu = calloc(topo.max_cpu_num + 1, sizeof(int));
-	if (fd_instr_count_percpu == NULL)
-		err(-1, "calloc fd_instr_count_percpu");
+	if (BIC_IS_ENABLED(BIC_IPC) && has_aperf) {
+		fd_instr_count_percpu = calloc(topo.max_cpu_num + 1, sizeof(int));
+		if (fd_instr_count_percpu == NULL)
+			err(-1, "calloc fd_instr_count_percpu");
+	}
+
+	const bool aperf_required = is_aperf_access_required();
+
+	if (aperf_required && has_aperf && amperf_source == AMPERF_SOURCE_PERF) {
+		fd_amperf_percpu = calloc(topo.max_cpu_num + 1, sizeof(*fd_amperf_percpu));
+		if (fd_amperf_percpu == NULL)
+			err(-1, "calloc fd_amperf_percpu");
+	}
+}
+
+void rapl_perf_init(void)
+{
+	const int num_domains = platform->has_per_core_rapl ? topo.num_cores : topo.num_packages;
+	bool *domain_visited = calloc(num_domains, sizeof(bool));
+
+	rapl_counter_info_perdomain = calloc(num_domains, sizeof(*rapl_counter_info_perdomain));
+	if (rapl_counter_info_perdomain == NULL)
+		err(-1, "calloc rapl_counter_info_percpu");
+
+	/*
+	 * Initialize rapl_counter_info_percpu
+	 */
+	for (int domain_id = 0; domain_id < num_domains; ++domain_id) {
+		struct rapl_counter_info_t *rci = &rapl_counter_info_perdomain[domain_id];
+
+		rci->fd_perf = -1;
+		for (size_t i = 0; i < NUM_RAPL_COUNTERS; ++i) {
+			rci->data[i] = 0;
+			rci->source[i] = RAPL_SOURCE_NONE;
+		}
+	}
 
-	BIC_PRESENT(BIC_IPC);
+	/*
+	 * Open/probe the counters
+	 * If can't get it via perf, fallback to MSR
+	 */
+	for (size_t i = 0; i < ARRAY_SIZE(rapl_counter_arch_infos); ++i) {
+
+		const struct rapl_counter_arch_info *const cai = &rapl_counter_arch_infos[i];
+		bool has_counter = 0;
+		double scale;
+		enum rapl_unit unit;
+		int next_domain;
+
+		memset(domain_visited, 0, num_domains * sizeof(*domain_visited));
+
+		for (int cpu = 0; cpu < topo.max_cpu_num + 1; ++cpu) {
+
+			if (cpu_is_not_allowed(cpu))
+				continue;
+
+			/* Skip already seen and handled RAPL domains */
+			next_domain =
+			    platform->has_per_core_rapl ? cpus[cpu].physical_core_id : cpus[cpu].physical_package_id;
+
+			if (domain_visited[next_domain])
+				continue;
+
+			domain_visited[next_domain] = 1;
+
+			struct rapl_counter_info_t *rci = &rapl_counter_info_perdomain[next_domain];
+
+			/* Check if the counter is enabled and accessible */
+			if (BIC_IS_ENABLED(cai->bic) && (platform->rapl_msrs & cai->feature_mask)) {
+
+				/* Use perf API for this counter */
+				if (!no_perf && cai->perf_name
+				    && add_rapl_perf_counter(cpu, rci, cai, &scale, &unit) != -1) {
+					rci->source[cai->rci_index] = RAPL_SOURCE_PERF;
+					rci->scale[cai->rci_index] = scale * cai->compat_scale;
+					rci->unit[cai->rci_index] = unit;
+					rci->flags[cai->rci_index] = cai->flags;
+
+					/* Use MSR for this counter */
+				} else if (!no_msr && cai->msr && probe_msr(cpu, cai->msr) == 0) {
+					rci->source[cai->rci_index] = RAPL_SOURCE_MSR;
+					rci->msr[cai->rci_index] = cai->msr;
+					rci->msr_mask[cai->rci_index] = cai->msr_mask;
+					rci->msr_shift[cai->rci_index] = cai->msr_shift;
+					rci->unit[cai->rci_index] = RAPL_UNIT_JOULES;
+					rci->scale[cai->rci_index] = *cai->platform_rapl_msr_scale * cai->compat_scale;
+					rci->flags[cai->rci_index] = cai->flags;
+				}
+			}
+
+			if (rci->source[cai->rci_index] != RAPL_SOURCE_NONE)
+				has_counter = 1;
+		}
+
+		/* If any CPU has access to the counter, make it present */
+		if (has_counter)
+			BIC_PRESENT(cai->bic);
+	}
+
+	free(domain_visited);
+}
+
+static int has_amperf_access_via_msr(void)
+{
+	if (no_msr)
+		return 0;
+
+	if (probe_msr(base_cpu, MSR_IA32_APERF))
+		return 0;
+
+	if (probe_msr(base_cpu, MSR_IA32_MPERF))
+		return 0;
+
+	return 1;
+}
+
+static int has_amperf_access_via_perf(void)
+{
+	struct amperf_group_fd fds;
+
+	/*
+	 * Cache the last result, so we don't warn the user multiple times
+	 *
+	 * Negative means cached, no access
+	 * Zero means not cached
+	 * Positive means cached, has access
+	 */
+	static int has_access_cached;
+
+	if (no_perf)
+		return 0;
+
+	if (has_access_cached != 0)
+		return has_access_cached > 0;
+
+	fds = open_amperf_fd(base_cpu);
+	has_access_cached = (fds.aperf != -1) && (fds.mperf != -1);
+
+	if (fds.aperf == -1)
+		warnx("Failed to access %s. Some of the counters may not be available\n"
+		      "\tRun as root to enable them or use %s to disable the access explicitly",
+		      "APERF perf counter", "--no-perf");
+	else
+		close(fds.aperf);
+
+	if (fds.mperf == -1)
+		warnx("Failed to access %s. Some of the counters may not be available\n"
+		      "\tRun as root to enable them or use %s to disable the access explicitly",
+		      "MPERF perf counter", "--no-perf");
+	else
+		close(fds.mperf);
+
+	if (has_access_cached == 0)
+		has_access_cached = -1;
+
+	return has_access_cached > 0;
+}
+
+/* Check if we can access APERF and MPERF */
+static int has_amperf_access(void)
+{
+	if (!is_aperf_access_required())
+		return 0;
+
+	if (!no_msr && has_amperf_access_via_msr())
+		return 1;
+
+	if (!no_perf && has_amperf_access_via_perf())
+		return 1;
+
+	return 0;
 }
 
 void probe_cstates(void)
@@ -5563,7 +6674,7 @@ void probe_cstates(void)
 	if (platform->has_msr_module_c6_res_ms)
 		BIC_PRESENT(BIC_Mod_c6);
 
-	if (platform->has_ext_cst_msrs) {
+	if (platform->has_ext_cst_msrs && !no_msr) {
 		BIC_PRESENT(BIC_Totl_c0);
 		BIC_PRESENT(BIC_Any_c0);
 		BIC_PRESENT(BIC_GFX_c0);
@@ -5623,6 +6734,7 @@ void process_cpuid()
 	unsigned int eax, ebx, ecx, edx;
 	unsigned int fms, family, model, stepping, ecx_flags, edx_flags;
 	unsigned long long ucode_patch = 0;
+	bool ucode_patch_valid = false;
 
 	eax = ebx = ecx = edx = 0;
 
@@ -5650,8 +6762,12 @@ void process_cpuid()
 	ecx_flags = ecx;
 	edx_flags = edx;
 
-	if (get_msr(sched_getcpu(), MSR_IA32_UCODE_REV, &ucode_patch))
-		warnx("get_msr(UCODE)");
+	if (!no_msr) {
+		if (get_msr(sched_getcpu(), MSR_IA32_UCODE_REV, &ucode_patch))
+			warnx("get_msr(UCODE)");
+		else
+			ucode_patch_valid = true;
+	}
 
 	/*
 	 * check max extended function levels of CPUID.
@@ -5662,9 +6778,12 @@ void process_cpuid()
 	__cpuid(0x80000000, max_extended_level, ebx, ecx, edx);
 
 	if (!quiet) {
-		fprintf(outf, "CPUID(1): family:model:stepping 0x%x:%x:%x (%d:%d:%d) microcode 0x%x\n",
-			family, model, stepping, family, model, stepping,
-			(unsigned int)((ucode_patch >> 32) & 0xFFFFFFFF));
+		fprintf(outf, "CPUID(1): family:model:stepping 0x%x:%x:%x (%d:%d:%d)",
+			family, model, stepping, family, model, stepping);
+		if (ucode_patch_valid)
+			fprintf(outf, " microcode 0x%x", (unsigned int)((ucode_patch >> 32) & 0xFFFFFFFF));
+		fputc('\n', outf);
+
 		fprintf(outf, "CPUID(0x80000000): max_extended_levels: 0x%x\n", max_extended_level);
 		fprintf(outf, "CPUID(1): %s %s %s %s %s %s %s %s %s %s\n",
 			ecx_flags & (1 << 0) ? "SSE3" : "-",
@@ -5700,10 +6819,11 @@ void process_cpuid()
 
 	__cpuid(0x6, eax, ebx, ecx, edx);
 	has_aperf = ecx & (1 << 0);
-	if (has_aperf) {
+	if (has_aperf && has_amperf_access()) {
 		BIC_PRESENT(BIC_Avg_MHz);
 		BIC_PRESENT(BIC_Busy);
 		BIC_PRESENT(BIC_Bzy_MHz);
+		BIC_PRESENT(BIC_IPC);
 	}
 	do_dts = eax & (1 << 0);
 	if (do_dts)
@@ -5786,6 +6906,15 @@ void process_cpuid()
 		base_mhz = max_mhz = bus_mhz = edx = 0;
 
 		__cpuid(0x16, base_mhz, max_mhz, bus_mhz, edx);
+
+		bclk = bus_mhz;
+
+		base_hz = base_mhz * 1000000;
+		has_base_hz = 1;
+
+		if (platform->enable_tsc_tweak)
+			tsc_tweak = base_hz / tsc_hz;
+
 		if (!quiet)
 			fprintf(outf, "CPUID(0x16): base_mhz: %d max_mhz: %d bus_mhz: %d\n",
 				base_mhz, max_mhz, bus_mhz);
@@ -5814,7 +6943,7 @@ void probe_pm_features(void)
 
 	probe_thermal();
 
-	if (platform->has_nhm_msrs)
+	if (platform->has_nhm_msrs && !no_msr)
 		BIC_PRESENT(BIC_SMI);
 
 	if (!quiet)
@@ -6142,6 +7271,7 @@ void topology_update(void)
 	topo.allowed_packages = 0;
 	for_all_cpus(update_topo, ODD_COUNTERS);
 }
+
 void setup_all_buffers(bool startup)
 {
 	topology_probe(startup);
@@ -6169,21 +7299,129 @@ void set_base_cpu(void)
 	err(-ENODEV, "No valid cpus found");
 }
 
+static void set_amperf_source(void)
+{
+	amperf_source = AMPERF_SOURCE_PERF;
+
+	const bool aperf_required = is_aperf_access_required();
+
+	if (no_perf || !aperf_required || !has_amperf_access_via_perf())
+		amperf_source = AMPERF_SOURCE_MSR;
+
+	if (quiet || !debug)
+		return;
+
+	fprintf(outf, "aperf/mperf source preference: %s\n", amperf_source == AMPERF_SOURCE_MSR ? "msr" : "perf");
+}
+
+bool has_added_counters(void)
+{
+	/*
+	 * It only makes sense to call this after the command line is parsed,
+	 * otherwise sys structure is not populated.
+	 */
+
+	return sys.added_core_counters | sys.added_thread_counters | sys.added_package_counters;
+}
+
+bool is_msr_access_required(void)
+{
+	if (no_msr)
+		return false;
+
+	if (has_added_counters())
+		return true;
+
+	return BIC_IS_ENABLED(BIC_SMI)
+	    || BIC_IS_ENABLED(BIC_CPU_c1)
+	    || BIC_IS_ENABLED(BIC_CPU_c3)
+	    || BIC_IS_ENABLED(BIC_CPU_c6)
+	    || BIC_IS_ENABLED(BIC_CPU_c7)
+	    || BIC_IS_ENABLED(BIC_Mod_c6)
+	    || BIC_IS_ENABLED(BIC_CoreTmp)
+	    || BIC_IS_ENABLED(BIC_Totl_c0)
+	    || BIC_IS_ENABLED(BIC_Any_c0)
+	    || BIC_IS_ENABLED(BIC_GFX_c0)
+	    || BIC_IS_ENABLED(BIC_CPUGFX)
+	    || BIC_IS_ENABLED(BIC_Pkgpc3)
+	    || BIC_IS_ENABLED(BIC_Pkgpc6)
+	    || BIC_IS_ENABLED(BIC_Pkgpc2)
+	    || BIC_IS_ENABLED(BIC_Pkgpc7)
+	    || BIC_IS_ENABLED(BIC_Pkgpc8)
+	    || BIC_IS_ENABLED(BIC_Pkgpc9)
+	    || BIC_IS_ENABLED(BIC_Pkgpc10)
+	    /* TODO: Multiplex access with perf */
+	    || BIC_IS_ENABLED(BIC_CorWatt)
+	    || BIC_IS_ENABLED(BIC_Cor_J)
+	    || BIC_IS_ENABLED(BIC_PkgWatt)
+	    || BIC_IS_ENABLED(BIC_CorWatt)
+	    || BIC_IS_ENABLED(BIC_GFXWatt)
+	    || BIC_IS_ENABLED(BIC_RAMWatt)
+	    || BIC_IS_ENABLED(BIC_Pkg_J)
+	    || BIC_IS_ENABLED(BIC_Cor_J)
+	    || BIC_IS_ENABLED(BIC_GFX_J)
+	    || BIC_IS_ENABLED(BIC_RAM_J)
+	    || BIC_IS_ENABLED(BIC_PKG__)
+	    || BIC_IS_ENABLED(BIC_RAM__)
+	    || BIC_IS_ENABLED(BIC_PkgTmp)
+	    || (is_aperf_access_required() && !has_amperf_access_via_perf());
+}
+
+void check_msr_access(void)
+{
+	if (!is_msr_access_required())
+		no_msr = 1;
+
+	check_dev_msr();
+	check_msr_permission();
+
+	if (no_msr)
+		bic_disable_msr_access();
+}
+
+void check_perf_access(void)
+{
+	const bool intrcount_required = BIC_IS_ENABLED(BIC_IPC);
+
+	if (no_perf || !intrcount_required || !has_instr_count_access())
+		bic_enabled &= ~BIC_IPC;
+
+	const bool aperf_required = is_aperf_access_required();
+
+	if (!aperf_required || !has_amperf_access()) {
+		bic_enabled &= ~BIC_Avg_MHz;
+		bic_enabled &= ~BIC_Busy;
+		bic_enabled &= ~BIC_Bzy_MHz;
+		bic_enabled &= ~BIC_IPC;
+	}
+}
+
 void turbostat_init()
 {
 	setup_all_buffers(true);
 	set_base_cpu();
-	check_dev_msr();
-	check_permissions();
+	check_msr_access();
+	check_perf_access();
 	process_cpuid();
 	probe_pm_features();
+	set_amperf_source();
 	linux_perf_init();
+	rapl_perf_init();
 
 	for_all_cpus(get_cpu_type, ODD_COUNTERS);
 	for_all_cpus(get_cpu_type, EVEN_COUNTERS);
 
 	if (DO_BIC(BIC_IPC))
 		(void)get_instr_count_fd(base_cpu);
+
+	/*
+	 * If TSC tweak is needed, but couldn't get it,
+	 * disable more BICs, since it can't be reported accurately.
+	 */
+	if (platform->enable_tsc_tweak && !has_base_hz) {
+		bic_enabled &= ~BIC_Busy;
+		bic_enabled &= ~BIC_Bzy_MHz;
+	}
 }
 
 int fork_it(char **argv)
@@ -6259,7 +7497,7 @@ int get_and_dump_counters(void)
 
 void print_version()
 {
-	fprintf(outf, "turbostat version 2023.11.07 - Len Brown <lenb@kernel.org>\n");
+	fprintf(outf, "turbostat version 2024.04.08 - Len Brown <lenb@kernel.org>\n");
 }
 
 #define COMMAND_LINE_SIZE 2048
@@ -6291,6 +7529,9 @@ int add_counter(unsigned int msr_num, char *path, char *name,
 {
 	struct msr_counter *msrp;
 
+	if (no_msr && msr_num)
+		errx(1, "Requested MSR counter 0x%x, but in --no-msr mode", msr_num);
+
 	msrp = calloc(1, sizeof(struct msr_counter));
 	if (msrp == NULL) {
 		perror("calloc");
@@ -6595,6 +7836,8 @@ void cmdline(int argc, char **argv)
 		{ "list", no_argument, 0, 'l' },
 		{ "out", required_argument, 0, 'o' },
 		{ "quiet", no_argument, 0, 'q' },
+		{ "no-msr", no_argument, 0, 'M' },
+		{ "no-perf", no_argument, 0, 'P' },
 		{ "show", required_argument, 0, 's' },
 		{ "Summary", no_argument, 0, 'S' },
 		{ "TCC", required_argument, 0, 'T' },
@@ -6604,7 +7847,25 @@ void cmdline(int argc, char **argv)
 
 	progname = argv[0];
 
-	while ((opt = getopt_long_only(argc, argv, "+C:c:Dde:hi:Jn:o:qST:v", long_options, &option_index)) != -1) {
+	/*
+	 * Parse some options early, because they may make other options invalid,
+	 * like adding the MSR counter with --add and at the same time using --no-msr.
+	 */
+	while ((opt = getopt_long_only(argc, argv, "MP", long_options, &option_index)) != -1) {
+		switch (opt) {
+		case 'M':
+			no_msr = 1;
+			break;
+		case 'P':
+			no_perf = 1;
+			break;
+		default:
+			break;
+		}
+	}
+	optind = 0;
+
+	while ((opt = getopt_long_only(argc, argv, "+C:c:Dde:hi:Jn:o:qMST:v", long_options, &option_index)) != -1) {
 		switch (opt) {
 		case 'a':
 			parse_add_command(optarg);
@@ -6662,6 +7923,10 @@ void cmdline(int argc, char **argv)
 		case 'q':
 			quiet = 1;
 			break;
+		case 'M':
+		case 'P':
+			/* Parsed earlier */
+			break;
 		case 'n':
 			num_iterations = strtod(optarg, NULL);
 
@@ -6704,6 +7969,22 @@ void cmdline(int argc, char **argv)
 	}
 }
 
+void set_rlimit(void)
+{
+	struct rlimit limit;
+
+	if (getrlimit(RLIMIT_NOFILE, &limit) < 0)
+		err(1, "Failed to get rlimit");
+
+	if (limit.rlim_max < MAX_NOFILE)
+		limit.rlim_max = MAX_NOFILE;
+	if (limit.rlim_cur < MAX_NOFILE)
+		limit.rlim_cur = MAX_NOFILE;
+
+	if (setrlimit(RLIMIT_NOFILE, &limit) < 0)
+		err(1, "Failed to set rlimit");
+}
+
 int main(int argc, char **argv)
 {
 	int fd, ret;
@@ -6729,9 +8010,13 @@ skip_cgroup_setting:
 
 	probe_sysfs();
 
+	if (!getuid())
+		set_rlimit();
+
 	turbostat_init();
 
-	msr_sum_record();
+	if (!no_msr)
+		msr_sum_record();
 
 	/* dump counters and exit */
 	if (dump_only)
diff --git a/tools/testing/selftests/turbostat/defcolumns.py b/tools/testing/selftests/turbostat/defcolumns.py
new file mode 100755
index 000000000000..d9b042097da7
--- /dev/null
+++ b/tools/testing/selftests/turbostat/defcolumns.py
@@ -0,0 +1,60 @@
+#!/bin/env python3
+# SPDX-License-Identifier: GPL-2.0
+
+import subprocess
+from shutil import which
+
+turbostat = which('turbostat')
+if turbostat is None:
+	print('Could not find turbostat binary')
+	exit(1)
+
+timeout = which('timeout')
+if timeout is None:
+	print('Could not find timeout binary')
+	exit(1)
+
+proc_turbostat = subprocess.run([turbostat, '--list'], capture_output = True)
+if proc_turbostat.returncode != 0:
+	print(f'turbostat failed with {proc_turbostat.returncode}')
+	exit(1)
+
+#
+# By default --list reports also "usec" and "Time_Of_Day_Seconds" columns
+# which are only visible when running with --debug.
+#
+expected_columns_debug = proc_turbostat.stdout.replace(b',', b'\t').strip()
+expected_columns = expected_columns_debug.replace(b'usec\t', b'').replace(b'Time_Of_Day_Seconds\t', b'').replace(b'X2APIC\t', b'').replace(b'APIC\t', b'')
+
+#
+# Run turbostat with no options for 10 seconds and send SIGINT
+#
+timeout_argv = [timeout, '--preserve-status', '-s', 'SIGINT', '-k', '3', '1s']
+turbostat_argv = [turbostat, '-i', '0.250']
+
+print(f'Running turbostat with {turbostat_argv=}... ', end = '', flush = True)
+proc_turbostat = subprocess.run(timeout_argv + turbostat_argv, capture_output = True)
+if proc_turbostat.returncode != 0:
+	print(f'turbostat failed with {proc_turbostat.returncode}')
+	exit(1)
+actual_columns = proc_turbostat.stdout.split(b'\n')[0]
+if expected_columns != actual_columns:
+	print(f'turbostat column check failed\n{expected_columns=}\n{actual_columns=}')
+	exit(1)
+print('OK')
+
+#
+# Same, but with --debug
+#
+turbostat_argv.append('--debug')
+
+print(f'Running turbostat with {turbostat_argv=}... ', end = '', flush = True)
+proc_turbostat = subprocess.run(timeout_argv + turbostat_argv, capture_output = True)
+if proc_turbostat.returncode != 0:
+	print(f'turbostat failed with {proc_turbostat.returncode}')
+	exit(1)
+actual_columns = proc_turbostat.stdout.split(b'\n')[0]
+if expected_columns_debug != actual_columns:
+	print(f'turbostat column check failed\n{expected_columns_debug=}\n{actual_columns=}')
+	exit(1)
+print('OK')
author	Linus Torvalds <torvalds@linux-foundation.org>	2024-04-10 13:13:27 -0700
committer	Linus Torvalds <torvalds@linux-foundation.org>	2024-04-10 13:13:27 -0700
commit	a6189a7407795b3f5167ea532ac85931cd26083a (patch)
tree	6796352b31b839505a5c1420fa4205e1af332fba /tools
parent	3679d9d1509ab7766f288cf4f70bea3f4c5cf193 (diff)
parent	3ab7296a7e6aa34634dcc2926af933107a117996 (diff)