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// SPDX-License-Identifier: GPL-2.0
#include <internal/cpumap.h>
#include "../../../util/cpumap.h"
#include "../../../util/pmu.h"
#include <api/fs/fs.h>
#include <math.h>
static struct perf_pmu *pmu__find_core_pmu(void)
{
struct perf_pmu *pmu = NULL;
while ((pmu = perf_pmu__scan(pmu))) {
if (!is_pmu_core(pmu->name))
continue;
/*
* The cpumap should cover all CPUs. Otherwise, some CPUs may
* not support some events or have different event IDs.
*/
if (RC_CHK_ACCESS(pmu->cpus)->nr != cpu__max_cpu().cpu)
return NULL;
return pmu;
}
return NULL;
}
const struct pmu_metrics_table *pmu_metrics_table__find(void)
{
struct perf_pmu *pmu = pmu__find_core_pmu();
if (pmu)
return perf_pmu__find_metrics_table(pmu);
return NULL;
}
const struct pmu_events_table *pmu_events_table__find(void)
{
struct perf_pmu *pmu = pmu__find_core_pmu();
if (pmu)
return perf_pmu__find_events_table(pmu);
return NULL;
}
double perf_pmu__cpu_slots_per_cycle(void)
{
char path[PATH_MAX];
unsigned long long slots = 0;
struct perf_pmu *pmu = pmu__find_core_pmu();
if (pmu) {
perf_pmu__pathname_scnprintf(path, sizeof(path),
pmu->name, "caps/slots");
/*
* The value of slots is not greater than 32 bits, but sysfs__read_int
* can't read value with 0x prefix, so use sysfs__read_ull instead.
*/
sysfs__read_ull(path, &slots);
}
return slots ? (double)slots : NAN;
}
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