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
11 const 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
27 double 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
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