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83 lines
2.1 KiB
83 lines
2.1 KiB
#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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