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89 lines
1.5 KiB
89 lines
1.5 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/list.h> |
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#include <linux/compiler.h> |
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#include <linux/string.h> |
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#include <linux/zalloc.h> |
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#include <sys/types.h> |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <sys/stat.h> |
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#include <unistd.h> |
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#include <stdio.h> |
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#include <stdbool.h> |
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#include <stdarg.h> |
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#include <locale.h> |
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#include <api/fs/fs.h> |
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#include "fncache.h" |
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#include "pmu-hybrid.h" |
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LIST_HEAD(perf_pmu__hybrid_pmus); |
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bool perf_pmu__hybrid_mounted(const char *name) |
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{ |
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char path[PATH_MAX]; |
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const char *sysfs; |
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FILE *file; |
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int n, cpu; |
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if (strncmp(name, "cpu_", 4)) |
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return false; |
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sysfs = sysfs__mountpoint(); |
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if (!sysfs) |
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return false; |
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snprintf(path, PATH_MAX, CPUS_TEMPLATE_CPU, sysfs, name); |
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if (!file_available(path)) |
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return false; |
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file = fopen(path, "r"); |
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if (!file) |
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return false; |
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n = fscanf(file, "%u", &cpu); |
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fclose(file); |
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if (n <= 0) |
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return false; |
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return true; |
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} |
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struct perf_pmu *perf_pmu__find_hybrid_pmu(const char *name) |
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{ |
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struct perf_pmu *pmu; |
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if (!name) |
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return NULL; |
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perf_pmu__for_each_hybrid_pmu(pmu) { |
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if (!strcmp(name, pmu->name)) |
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return pmu; |
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} |
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return NULL; |
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} |
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bool perf_pmu__is_hybrid(const char *name) |
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{ |
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return perf_pmu__find_hybrid_pmu(name) != NULL; |
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} |
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char *perf_pmu__hybrid_type_to_pmu(const char *type) |
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{ |
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char *pmu_name = NULL; |
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if (asprintf(&pmu_name, "cpu_%s", type) < 0) |
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return NULL; |
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if (perf_pmu__is_hybrid(pmu_name)) |
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return pmu_name; |
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/* |
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* pmu may be not scanned, check the sysfs. |
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*/ |
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if (perf_pmu__hybrid_mounted(pmu_name)) |
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return pmu_name; |
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free(pmu_name); |
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return NULL; |
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}
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