84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
#include <linux/perf_event.h>
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#include <perf/evlist.h>
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#include <perf/evsel.h>
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#include <perf/cpumap.h>
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#include <perf/threadmap.h>
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#include <perf/mmap.h>
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#include <perf/core.h>
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#include <perf/event.h>
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#include <stdio.h>
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#include <unistd.h>
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static int libperf_print(enum libperf_print_level level,
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const char *fmt, va_list ap)
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{
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return vfprintf(stderr, fmt, ap);
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}
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int main(int argc, char **argv)
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{
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int count = 100000, err = 0;
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struct perf_evlist *evlist;
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struct perf_evsel *evsel;
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struct perf_thread_map *threads;
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struct perf_counts_values counts;
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struct perf_event_attr attr1 = {
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.type = PERF_TYPE_SOFTWARE,
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.config = PERF_COUNT_SW_CPU_CLOCK,
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.read_format = PERF_FORMAT_TOTAL_TIME_ENABLED|PERF_FORMAT_TOTAL_TIME_RUNNING,
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.disabled = 1,
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};
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struct perf_event_attr attr2 = {
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.type = PERF_TYPE_SOFTWARE,
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.config = PERF_COUNT_SW_TASK_CLOCK,
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.read_format = PERF_FORMAT_TOTAL_TIME_ENABLED|PERF_FORMAT_TOTAL_TIME_RUNNING,
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.disabled = 1,
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};
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libperf_init(libperf_print);
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threads = perf_thread_map__new_dummy();
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if (!threads) {
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fprintf(stderr, "failed to create threads\n");
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return -1;
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}
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perf_thread_map__set_pid(threads, 0, 0);
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evlist = perf_evlist__new();
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if (!evlist) {
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fprintf(stderr, "failed to create evlist\n");
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goto out_threads;
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}
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evsel = perf_evsel__new(&attr1);
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if (!evsel) {
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fprintf(stderr, "failed to create evsel1\n");
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goto out_evlist;
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}
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perf_evlist__add(evlist, evsel);
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evsel = perf_evsel__new(&attr2);
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if (!evsel) {
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fprintf(stderr, "failed to create evsel2\n");
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goto out_evlist;
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}
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perf_evlist__add(evlist, evsel);
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perf_evlist__set_maps(evlist, NULL, threads);
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err = perf_evlist__open(evlist);
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if (err) {
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fprintf(stderr, "failed to open evsel\n");
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goto out_evlist;
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}
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perf_evlist__enable(evlist);
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while (count--);
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perf_evlist__disable(evlist);
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perf_evlist__for_each_evsel(evlist, evsel) {
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perf_evsel__read(evsel, 0, 0, &counts);
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fprintf(stdout, "count %llu, enabled %llu, run %llu\n",
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counts.val, counts.ena, counts.run);
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}
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perf_evlist__close(evlist);
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out_evlist:
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perf_evlist__delete(evlist);
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out_threads:
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perf_thread_map__put(threads);
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return err;
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}
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