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-rw-r--r--tools/perf/util/stat-shadow.c197
1 files changed, 197 insertions, 0 deletions
diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
index 8a2bbd2a4d82..ac10cc675d39 100644
--- a/tools/perf/util/stat-shadow.c
+++ b/tools/perf/util/stat-shadow.c
@@ -3,6 +3,9 @@
#include "stat.h"
#include "color.h"
#include "pmu.h"
+#include "rblist.h"
+#include "evlist.h"
+#include "expr.h"
enum {
CTX_BIT_USER = 1 << 0,
@@ -41,13 +44,73 @@ static struct stats runtime_topdown_slots_issued[NUM_CTX][MAX_NR_CPUS];
static struct stats runtime_topdown_slots_retired[NUM_CTX][MAX_NR_CPUS];
static struct stats runtime_topdown_fetch_bubbles[NUM_CTX][MAX_NR_CPUS];
static struct stats runtime_topdown_recovery_bubbles[NUM_CTX][MAX_NR_CPUS];
+static struct rblist runtime_saved_values;
static bool have_frontend_stalled;
struct stats walltime_nsecs_stats;
+struct saved_value {
+ struct rb_node rb_node;
+ struct perf_evsel *evsel;
+ int cpu;
+ int ctx;
+ struct stats stats;
+};
+
+static int saved_value_cmp(struct rb_node *rb_node, const void *entry)
+{
+ struct saved_value *a = container_of(rb_node,
+ struct saved_value,
+ rb_node);
+ const struct saved_value *b = entry;
+
+ if (a->ctx != b->ctx)
+ return a->ctx - b->ctx;
+ if (a->cpu != b->cpu)
+ return a->cpu - b->cpu;
+ return a->evsel - b->evsel;
+}
+
+static struct rb_node *saved_value_new(struct rblist *rblist __maybe_unused,
+ const void *entry)
+{
+ struct saved_value *nd = malloc(sizeof(struct saved_value));
+
+ if (!nd)
+ return NULL;
+ memcpy(nd, entry, sizeof(struct saved_value));
+ return &nd->rb_node;
+}
+
+static struct saved_value *saved_value_lookup(struct perf_evsel *evsel,
+ int cpu, int ctx,
+ bool create)
+{
+ struct rb_node *nd;
+ struct saved_value dm = {
+ .cpu = cpu,
+ .ctx = ctx,
+ .evsel = evsel,
+ };
+ nd = rblist__find(&runtime_saved_values, &dm);
+ if (nd)
+ return container_of(nd, struct saved_value, rb_node);
+ if (create) {
+ rblist__add_node(&runtime_saved_values, &dm);
+ nd = rblist__find(&runtime_saved_values, &dm);
+ if (nd)
+ return container_of(nd, struct saved_value, rb_node);
+ }
+ return NULL;
+}
+
void perf_stat__init_shadow_stats(void)
{
have_frontend_stalled = pmu_have_event("cpu", "stalled-cycles-frontend");
+ rblist__init(&runtime_saved_values);
+ runtime_saved_values.node_cmp = saved_value_cmp;
+ runtime_saved_values.node_new = saved_value_new;
+ /* No delete for now */
}
static int evsel_context(struct perf_evsel *evsel)
@@ -70,6 +133,8 @@ static int evsel_context(struct perf_evsel *evsel)
void perf_stat__reset_shadow_stats(void)
{
+ struct rb_node *pos, *next;
+
memset(runtime_nsecs_stats, 0, sizeof(runtime_nsecs_stats));
memset(runtime_cycles_stats, 0, sizeof(runtime_cycles_stats));
memset(runtime_stalled_cycles_front_stats, 0, sizeof(runtime_stalled_cycles_front_stats));
@@ -92,6 +157,15 @@ void perf_stat__reset_shadow_stats(void)
memset(runtime_topdown_slots_issued, 0, sizeof(runtime_topdown_slots_issued));
memset(runtime_topdown_fetch_bubbles, 0, sizeof(runtime_topdown_fetch_bubbles));
memset(runtime_topdown_recovery_bubbles, 0, sizeof(runtime_topdown_recovery_bubbles));
+
+ next = rb_first(&runtime_saved_values.entries);
+ while (next) {
+ pos = next;
+ next = rb_next(pos);
+ memset(&container_of(pos, struct saved_value, rb_node)->stats,
+ 0,
+ sizeof(struct stats));
+ }
}
/*
@@ -143,6 +217,12 @@ void perf_stat__update_shadow_stats(struct perf_evsel *counter, u64 *count,
update_stats(&runtime_dtlb_cache_stats[ctx][cpu], count[0]);
else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
update_stats(&runtime_itlb_cache_stats[ctx][cpu], count[0]);
+
+ if (counter->collect_stat) {
+ struct saved_value *v = saved_value_lookup(counter, cpu, ctx,
+ true);
+ update_stats(&v->stats, count[0]);
+ }
}
/* used for get_ratio_color() */
@@ -172,6 +252,95 @@ static const char *get_ratio_color(enum grc_type type, double ratio)
return color;
}
+static struct perf_evsel *perf_stat__find_event(struct perf_evlist *evsel_list,
+ const char *name)
+{
+ struct perf_evsel *c2;
+
+ evlist__for_each_entry (evsel_list, c2) {
+ if (!strcasecmp(c2->name, name))
+ return c2;
+ }
+ return NULL;
+}
+
+/* Mark MetricExpr target events and link events using them to them. */
+void perf_stat__collect_metric_expr(struct perf_evlist *evsel_list)
+{
+ struct perf_evsel *counter, *leader, **metric_events, *oc;
+ bool found;
+ const char **metric_names;
+ int i;
+ int num_metric_names;
+
+ evlist__for_each_entry(evsel_list, counter) {
+ bool invalid = false;
+
+ leader = counter->leader;
+ if (!counter->metric_expr)
+ continue;
+ metric_events = counter->metric_events;
+ if (!metric_events) {
+ if (expr__find_other(counter->metric_expr, counter->name,
+ &metric_names, &num_metric_names) < 0)
+ continue;
+
+ metric_events = calloc(sizeof(struct perf_evsel *),
+ num_metric_names + 1);
+ if (!metric_events)
+ return;
+ counter->metric_events = metric_events;
+ }
+
+ for (i = 0; i < num_metric_names; i++) {
+ found = false;
+ if (leader) {
+ /* Search in group */
+ for_each_group_member (oc, leader) {
+ if (!strcasecmp(oc->name, metric_names[i])) {
+ found = true;
+ break;
+ }
+ }
+ }
+ if (!found) {
+ /* Search ignoring groups */
+ oc = perf_stat__find_event(evsel_list, metric_names[i]);
+ }
+ if (!oc) {
+ /* Deduping one is good enough to handle duplicated PMUs. */
+ static char *printed;
+
+ /*
+ * Adding events automatically would be difficult, because
+ * it would risk creating groups that are not schedulable.
+ * perf stat doesn't understand all the scheduling constraints
+ * of events. So we ask the user instead to add the missing
+ * events.
+ */
+ if (!printed || strcasecmp(printed, metric_names[i])) {
+ fprintf(stderr,
+ "Add %s event to groups to get metric expression for %s\n",
+ metric_names[i],
+ counter->name);
+ printed = strdup(metric_names[i]);
+ }
+ invalid = true;
+ continue;
+ }
+ metric_events[i] = oc;
+ oc->collect_stat = true;
+ }
+ metric_events[i] = NULL;
+ free(metric_names);
+ if (invalid) {
+ free(metric_events);
+ counter->metric_events = NULL;
+ counter->metric_expr = NULL;
+ }
+ }
+}
+
static void print_stalled_cycles_frontend(int cpu,
struct perf_evsel *evsel, double avg,
struct perf_stat_output_ctx *out)
@@ -614,6 +783,34 @@ void perf_stat__print_shadow_stats(struct perf_evsel *evsel,
be_bound * 100.);
else
print_metric(ctxp, NULL, NULL, name, 0);
+ } else if (evsel->metric_expr) {
+ struct parse_ctx pctx;
+ int i;
+
+ expr__ctx_init(&pctx);
+ expr__add_id(&pctx, evsel->name, avg);
+ for (i = 0; evsel->metric_events[i]; i++) {
+ struct saved_value *v;
+
+ v = saved_value_lookup(evsel->metric_events[i], cpu, ctx, false);
+ if (!v)
+ break;
+ expr__add_id(&pctx, evsel->metric_events[i]->name,
+ avg_stats(&v->stats));
+ }
+ if (!evsel->metric_events[i]) {
+ const char *p = evsel->metric_expr;
+
+ if (expr__parse(&ratio, &pctx, &p) == 0)
+ print_metric(ctxp, NULL, "%8.1f",
+ evsel->metric_name ?
+ evsel->metric_name :
+ out->force_header ? evsel->name : "",
+ ratio);
+ else
+ print_metric(ctxp, NULL, NULL, "", 0);
+ } else
+ print_metric(ctxp, NULL, NULL, "", 0);
} else if (runtime_nsecs_stats[cpu].n != 0) {
char unit = 'M';
char unit_buf[10];
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-28 19:05:09 +0000