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