1#include <linux/perf_event.h>
2#include <perf/evlist.h>
3#include <perf/evsel.h>
4#include <perf/cpumap.h>
5#include <perf/threadmap.h>
6#include <perf/mmap.h>
7#include <perf/core.h>
8#include <perf/event.h>
9#include <stdio.h>
10#include <unistd.h>
11
12static int libperf_print(enum libperf_print_level level,
13                         const char *fmt, va_list ap)
14{
15	return vfprintf(stderr, fmt, ap);
16}
17
18int main(int argc, char **argv)
19{
20	int count = 100000, err = 0;
21	struct perf_evlist *evlist;
22	struct perf_evsel *evsel;
23	struct perf_thread_map *threads;
24	struct perf_counts_values counts;
25
26	struct perf_event_attr attr1 = {
27		.type        = PERF_TYPE_SOFTWARE,
28		.config      = PERF_COUNT_SW_CPU_CLOCK,
29		.read_format = PERF_FORMAT_TOTAL_TIME_ENABLED|PERF_FORMAT_TOTAL_TIME_RUNNING,
30		.disabled    = 1,
31	};
32	struct perf_event_attr attr2 = {
33		.type        = PERF_TYPE_SOFTWARE,
34		.config      = PERF_COUNT_SW_TASK_CLOCK,
35		.read_format = PERF_FORMAT_TOTAL_TIME_ENABLED|PERF_FORMAT_TOTAL_TIME_RUNNING,
36		.disabled    = 1,
37	};
38
39	libperf_init(libperf_print);
40	threads = perf_thread_map__new_dummy();
41	if (!threads) {
42		fprintf(stderr, "failed to create threads\n");
43		return -1;
44	}
45	perf_thread_map__set_pid(threads, 0, 0);
46	evlist = perf_evlist__new();
47	if (!evlist) {
48		fprintf(stderr, "failed to create evlist\n");
49		goto out_threads;
50	}
51	evsel = perf_evsel__new(&attr1);
52	if (!evsel) {
53		fprintf(stderr, "failed to create evsel1\n");
54		goto out_evlist;
55	}
56	perf_evlist__add(evlist, evsel);
57	evsel = perf_evsel__new(&attr2);
58	if (!evsel) {
59		fprintf(stderr, "failed to create evsel2\n");
60		goto out_evlist;
61	}
62	perf_evlist__add(evlist, evsel);
63	perf_evlist__set_maps(evlist, NULL, threads);
64	err = perf_evlist__open(evlist);
65	if (err) {
66		fprintf(stderr, "failed to open evsel\n");
67		goto out_evlist;
68	}
69	perf_evlist__enable(evlist);
70	while (count--);
71	perf_evlist__disable(evlist);
72	perf_evlist__for_each_evsel(evlist, evsel) {
73		perf_evsel__read(evsel, 0, 0, &counts);
74		fprintf(stdout, "count %llu, enabled %llu, run %llu\n",
75				counts.val, counts.ena, counts.run);
76	}
77	perf_evlist__close(evlist);
78out_evlist:
79	perf_evlist__delete(evlist);
80out_threads:
81	perf_thread_map__put(threads);
82	return err;
83}
84