1// SPDX-License-Identifier: GPL-2.0
2
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, but
38		 * 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