90 строки
1.5 KiB
C
90 строки
1.5 KiB
C
// 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;
|
|
}
|