| 1 | #include <linux/perf_event.h>
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| 2 | #include <perf/evlist.h>
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| 3 | #include <perf/evsel.h>
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| 4 | #include <perf/cpumap.h>
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| 5 | #include <perf/threadmap.h>
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| 6 | #include <perf/mmap.h>
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| 7 | #include <perf/core.h>
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| 8 | #include <perf/event.h>
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| 9 | #include <stdio.h>
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| 10 | #include <unistd.h>
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| 11 |
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| 12 | static int libperf_print(enum libperf_print_level level,
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| 13 | const char *fmt, va_list ap)
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| 14 | {
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| 15 | return vfprintf(stderr, fmt, ap);
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| 16 | }
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| 17 |
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| 18 | int main(int argc, char **argv)
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| 19 | {
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| 20 | int count = 100000, err = 0;
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| 21 | struct perf_evlist *evlist;
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| 22 | struct perf_evsel *evsel;
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| 23 | struct perf_thread_map *threads;
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| 24 | struct perf_counts_values counts;
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| 25 |
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| 26 | struct perf_event_attr attr1 = {
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| 27 | .type = PERF_TYPE_SOFTWARE,
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| 28 | .config = PERF_COUNT_SW_CPU_CLOCK,
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| 29 | .read_format = PERF_FORMAT_TOTAL_TIME_ENABLED|PERF_FORMAT_TOTAL_TIME_RUNNING,
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| 30 | .disabled = 1,
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| 31 | };
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| 32 | struct perf_event_attr attr2 = {
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| 33 | .type = PERF_TYPE_SOFTWARE,
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| 34 | .config = PERF_COUNT_SW_TASK_CLOCK,
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| 35 | .read_format = PERF_FORMAT_TOTAL_TIME_ENABLED|PERF_FORMAT_TOTAL_TIME_RUNNING,
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| 36 | .disabled = 1,
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| 37 | };
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| 38 |
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| 39 | libperf_init(libperf_print);
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| 40 | threads = perf_thread_map__new_dummy();
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| 41 | if (!threads) {
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| 42 | fprintf(stderr, "failed to create threads\n");
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| 43 | return -1;
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| 44 | }
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| 45 | perf_thread_map__set_pid(threads, 0, 0);
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| 46 | evlist = perf_evlist__new();
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| 47 | if (!evlist) {
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| 48 | fprintf(stderr, "failed to create evlist\n");
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| 49 | goto out_threads;
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| 50 | }
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| 51 | evsel = perf_evsel__new(&attr1);
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| 52 | if (!evsel) {
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| 53 | fprintf(stderr, "failed to create evsel1\n");
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| 54 | goto out_evlist;
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| 55 | }
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| 56 | perf_evlist__add(evlist, evsel);
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| 57 | evsel = perf_evsel__new(&attr2);
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| 58 | if (!evsel) {
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| 59 | fprintf(stderr, "failed to create evsel2\n");
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| 60 | goto out_evlist;
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| 61 | }
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| 62 | perf_evlist__add(evlist, evsel);
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| 63 | perf_evlist__set_maps(evlist, NULL, threads);
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| 64 | err = perf_evlist__open(evlist);
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| 65 | if (err) {
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| 66 | fprintf(stderr, "failed to open evsel\n");
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| 67 | goto out_evlist;
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| 68 | }
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| 69 | perf_evlist__enable(evlist);
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| 70 | while (count--);
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| 71 | perf_evlist__disable(evlist);
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| 72 | perf_evlist__for_each_evsel(evlist, evsel) {
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| 73 | perf_evsel__read(evsel, 0, 0, &counts);
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| 74 | fprintf(stdout, "count %llu, enabled %llu, run %llu\n",
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| 75 | counts.val, counts.ena, counts.run);
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| 76 | }
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| 77 | perf_evlist__close(evlist);
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| 78 | out_evlist:
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| 79 | perf_evlist__delete(evlist);
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| 80 | out_threads:
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| 81 | perf_thread_map__put(threads);
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| 82 | return err;
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| 83 | }
|