brintos

brintos / linux-shallow public Read only

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1// SPDX-License-Identifier: GPL-2.02 3#include <internal/cpumap.h>4#include "../../../util/cpumap.h"5#include "../../../util/header.h"6#include "../../../util/pmu.h"7#include "../../../util/pmus.h"8#include <api/fs/fs.h>9#include <math.h>10 11const struct pmu_metrics_table *pmu_metrics_table__find(void)12{13	struct perf_pmu *pmu;14 15	/* Metrics aren't currently supported on heterogeneous Arm systems */16	if (perf_pmus__num_core_pmus() > 1)17		return NULL;18 19	/* Doesn't matter which one here because they'll all be the same */20	pmu = perf_pmus__find_core_pmu();21	if (pmu)22		return perf_pmu__find_metrics_table(pmu);23 24	return NULL;25}26 27double perf_pmu__cpu_slots_per_cycle(void)28{29	char path[PATH_MAX];30	unsigned long long slots = 0;31	struct perf_pmu *pmu = perf_pmus__find_core_pmu();32 33	if (pmu) {34		perf_pmu__pathname_scnprintf(path, sizeof(path),35					     pmu->name, "caps/slots");36		/*37		 * The value of slots is not greater than 32 bits, but38		 * filename__read_int can't read value with 0x prefix,39		 * so use filename__read_ull instead.40		 */41		filename__read_ull(path, &slots);42	}43 44	return slots ? (double)slots : NAN;45}46