1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/list.h>
#include <linux/compiler.h>
#include <linux/string.h>
#include <linux/zalloc.h>
#include <sys/types.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include <stdbool.h>
#include <stdarg.h>
#include <locale.h>
#include <api/fs/fs.h>
#include "fncache.h"
#include "pmu-hybrid.h"
LIST_HEAD(perf_pmu__hybrid_pmus);
bool perf_pmu__hybrid_mounted(const char *name)
{
char path[PATH_MAX];
const char *sysfs;
FILE *file;
int n, cpu;
if (strncmp(name, "cpu_", 4))
return false;
sysfs = sysfs__mountpoint();
if (!sysfs)
return false;
snprintf(path, PATH_MAX, CPUS_TEMPLATE_CPU, sysfs, name);
if (!file_available(path))
return false;
file = fopen(path, "r");
if (!file)
return false;
n = fscanf(file, "%u", &cpu);
fclose(file);
if (n <= 0)
return false;
return true;
}
struct perf_pmu *perf_pmu__find_hybrid_pmu(const char *name)
{
struct perf_pmu *pmu;
if (!name)
return NULL;
perf_pmu__for_each_hybrid_pmu(pmu) {
if (!strcmp(name, pmu->name))
return pmu;
}
return NULL;
}
bool perf_pmu__is_hybrid(const char *name)
{
return perf_pmu__find_hybrid_pmu(name) != NULL;
}
char *perf_pmu__hybrid_type_to_pmu(const char *type)
{
char *pmu_name = NULL;
if (asprintf(&pmu_name, "cpu_%s", type) < 0)
return NULL;
if (perf_pmu__is_hybrid(pmu_name))
return pmu_name;
/*
* pmu may be not scanned, check the sysfs.
*/
if (perf_pmu__hybrid_mounted(pmu_name))
return pmu_name;
free(pmu_name);
return NULL;
}
|
