1*4882a593Smuzhiyun #include <linux/perf_event.h>
2*4882a593Smuzhiyun #include <perf/evlist.h>
3*4882a593Smuzhiyun #include <perf/evsel.h>
4*4882a593Smuzhiyun #include <perf/cpumap.h>
5*4882a593Smuzhiyun #include <perf/threadmap.h>
6*4882a593Smuzhiyun #include <perf/mmap.h>
7*4882a593Smuzhiyun #include <perf/core.h>
8*4882a593Smuzhiyun #include <perf/event.h>
9*4882a593Smuzhiyun #include <stdio.h>
10*4882a593Smuzhiyun #include <unistd.h>
11*4882a593Smuzhiyun
libperf_print(enum libperf_print_level level,const char * fmt,va_list ap)12*4882a593Smuzhiyun static int libperf_print(enum libperf_print_level level,
13*4882a593Smuzhiyun const char *fmt, va_list ap)
14*4882a593Smuzhiyun {
15*4882a593Smuzhiyun return vfprintf(stderr, fmt, ap);
16*4882a593Smuzhiyun }
17*4882a593Smuzhiyun
main(int argc,char ** argv)18*4882a593Smuzhiyun int main(int argc, char **argv)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun int count = 100000, err = 0;
21*4882a593Smuzhiyun struct perf_evlist *evlist;
22*4882a593Smuzhiyun struct perf_evsel *evsel;
23*4882a593Smuzhiyun struct perf_thread_map *threads;
24*4882a593Smuzhiyun struct perf_counts_values counts;
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun struct perf_event_attr attr1 = {
27*4882a593Smuzhiyun .type = PERF_TYPE_SOFTWARE,
28*4882a593Smuzhiyun .config = PERF_COUNT_SW_CPU_CLOCK,
29*4882a593Smuzhiyun .read_format = PERF_FORMAT_TOTAL_TIME_ENABLED|PERF_FORMAT_TOTAL_TIME_RUNNING,
30*4882a593Smuzhiyun .disabled = 1,
31*4882a593Smuzhiyun };
32*4882a593Smuzhiyun struct perf_event_attr attr2 = {
33*4882a593Smuzhiyun .type = PERF_TYPE_SOFTWARE,
34*4882a593Smuzhiyun .config = PERF_COUNT_SW_TASK_CLOCK,
35*4882a593Smuzhiyun .read_format = PERF_FORMAT_TOTAL_TIME_ENABLED|PERF_FORMAT_TOTAL_TIME_RUNNING,
36*4882a593Smuzhiyun .disabled = 1,
37*4882a593Smuzhiyun };
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun libperf_init(libperf_print);
40*4882a593Smuzhiyun threads = perf_thread_map__new_dummy();
41*4882a593Smuzhiyun if (!threads) {
42*4882a593Smuzhiyun fprintf(stderr, "failed to create threads\n");
43*4882a593Smuzhiyun return -1;
44*4882a593Smuzhiyun }
45*4882a593Smuzhiyun perf_thread_map__set_pid(threads, 0, 0);
46*4882a593Smuzhiyun evlist = perf_evlist__new();
47*4882a593Smuzhiyun if (!evlist) {
48*4882a593Smuzhiyun fprintf(stderr, "failed to create evlist\n");
49*4882a593Smuzhiyun goto out_threads;
50*4882a593Smuzhiyun }
51*4882a593Smuzhiyun evsel = perf_evsel__new(&attr1);
52*4882a593Smuzhiyun if (!evsel) {
53*4882a593Smuzhiyun fprintf(stderr, "failed to create evsel1\n");
54*4882a593Smuzhiyun goto out_evlist;
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun perf_evlist__add(evlist, evsel);
57*4882a593Smuzhiyun evsel = perf_evsel__new(&attr2);
58*4882a593Smuzhiyun if (!evsel) {
59*4882a593Smuzhiyun fprintf(stderr, "failed to create evsel2\n");
60*4882a593Smuzhiyun goto out_evlist;
61*4882a593Smuzhiyun }
62*4882a593Smuzhiyun perf_evlist__add(evlist, evsel);
63*4882a593Smuzhiyun perf_evlist__set_maps(evlist, NULL, threads);
64*4882a593Smuzhiyun err = perf_evlist__open(evlist);
65*4882a593Smuzhiyun if (err) {
66*4882a593Smuzhiyun fprintf(stderr, "failed to open evsel\n");
67*4882a593Smuzhiyun goto out_evlist;
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun perf_evlist__enable(evlist);
70*4882a593Smuzhiyun while (count--);
71*4882a593Smuzhiyun perf_evlist__disable(evlist);
72*4882a593Smuzhiyun perf_evlist__for_each_evsel(evlist, evsel) {
73*4882a593Smuzhiyun perf_evsel__read(evsel, 0, 0, &counts);
74*4882a593Smuzhiyun fprintf(stdout, "count %llu, enabled %llu, run %llu\n",
75*4882a593Smuzhiyun counts.val, counts.ena, counts.run);
76*4882a593Smuzhiyun }
77*4882a593Smuzhiyun perf_evlist__close(evlist);
78*4882a593Smuzhiyun out_evlist:
79*4882a593Smuzhiyun perf_evlist__delete(evlist);
80*4882a593Smuzhiyun out_threads:
81*4882a593Smuzhiyun perf_thread_map__put(threads);
82*4882a593Smuzhiyun return err;
83*4882a593Smuzhiyun }
84