1*76ce0265SMichael Petlan #include <linux/perf_event.h>
2*76ce0265SMichael Petlan #include <perf/evlist.h>
3*76ce0265SMichael Petlan #include <perf/evsel.h>
4*76ce0265SMichael Petlan #include <perf/cpumap.h>
5*76ce0265SMichael Petlan #include <perf/threadmap.h>
6*76ce0265SMichael Petlan #include <perf/mmap.h>
7*76ce0265SMichael Petlan #include <perf/core.h>
8*76ce0265SMichael Petlan #include <perf/event.h>
9*76ce0265SMichael Petlan #include <stdio.h>
10*76ce0265SMichael Petlan #include <unistd.h>
11*76ce0265SMichael Petlan
libperf_print(enum libperf_print_level level,const char * fmt,va_list ap)12*76ce0265SMichael Petlan static int libperf_print(enum libperf_print_level level,
13*76ce0265SMichael Petlan const char *fmt, va_list ap)
14*76ce0265SMichael Petlan {
15*76ce0265SMichael Petlan return vfprintf(stderr, fmt, ap);
16*76ce0265SMichael Petlan }
17*76ce0265SMichael Petlan
main(int argc,char ** argv)18*76ce0265SMichael Petlan int main(int argc, char **argv)
19*76ce0265SMichael Petlan {
20*76ce0265SMichael Petlan int count = 100000, err = 0;
21*76ce0265SMichael Petlan struct perf_evlist *evlist;
22*76ce0265SMichael Petlan struct perf_evsel *evsel;
23*76ce0265SMichael Petlan struct perf_thread_map *threads;
24*76ce0265SMichael Petlan struct perf_counts_values counts;
25*76ce0265SMichael Petlan
26*76ce0265SMichael Petlan struct perf_event_attr attr1 = {
27*76ce0265SMichael Petlan .type = PERF_TYPE_SOFTWARE,
28*76ce0265SMichael Petlan .config = PERF_COUNT_SW_CPU_CLOCK,
29*76ce0265SMichael Petlan .read_format = PERF_FORMAT_TOTAL_TIME_ENABLED|PERF_FORMAT_TOTAL_TIME_RUNNING,
30*76ce0265SMichael Petlan .disabled = 1,
31*76ce0265SMichael Petlan };
32*76ce0265SMichael Petlan struct perf_event_attr attr2 = {
33*76ce0265SMichael Petlan .type = PERF_TYPE_SOFTWARE,
34*76ce0265SMichael Petlan .config = PERF_COUNT_SW_TASK_CLOCK,
35*76ce0265SMichael Petlan .read_format = PERF_FORMAT_TOTAL_TIME_ENABLED|PERF_FORMAT_TOTAL_TIME_RUNNING,
36*76ce0265SMichael Petlan .disabled = 1,
37*76ce0265SMichael Petlan };
38*76ce0265SMichael Petlan
39*76ce0265SMichael Petlan libperf_init(libperf_print);
40*76ce0265SMichael Petlan threads = perf_thread_map__new_dummy();
41*76ce0265SMichael Petlan if (!threads) {
42*76ce0265SMichael Petlan fprintf(stderr, "failed to create threads\n");
43*76ce0265SMichael Petlan return -1;
44*76ce0265SMichael Petlan }
45*76ce0265SMichael Petlan perf_thread_map__set_pid(threads, 0, 0);
46*76ce0265SMichael Petlan evlist = perf_evlist__new();
47*76ce0265SMichael Petlan if (!evlist) {
48*76ce0265SMichael Petlan fprintf(stderr, "failed to create evlist\n");
49*76ce0265SMichael Petlan goto out_threads;
50*76ce0265SMichael Petlan }
51*76ce0265SMichael Petlan evsel = perf_evsel__new(&attr1);
52*76ce0265SMichael Petlan if (!evsel) {
53*76ce0265SMichael Petlan fprintf(stderr, "failed to create evsel1\n");
54*76ce0265SMichael Petlan goto out_evlist;
55*76ce0265SMichael Petlan }
56*76ce0265SMichael Petlan perf_evlist__add(evlist, evsel);
57*76ce0265SMichael Petlan evsel = perf_evsel__new(&attr2);
58*76ce0265SMichael Petlan if (!evsel) {
59*76ce0265SMichael Petlan fprintf(stderr, "failed to create evsel2\n");
60*76ce0265SMichael Petlan goto out_evlist;
61*76ce0265SMichael Petlan }
62*76ce0265SMichael Petlan perf_evlist__add(evlist, evsel);
63*76ce0265SMichael Petlan perf_evlist__set_maps(evlist, NULL, threads);
64*76ce0265SMichael Petlan err = perf_evlist__open(evlist);
65*76ce0265SMichael Petlan if (err) {
66*76ce0265SMichael Petlan fprintf(stderr, "failed to open evsel\n");
67*76ce0265SMichael Petlan goto out_evlist;
68*76ce0265SMichael Petlan }
69*76ce0265SMichael Petlan perf_evlist__enable(evlist);
70*76ce0265SMichael Petlan while (count--);
71*76ce0265SMichael Petlan perf_evlist__disable(evlist);
72*76ce0265SMichael Petlan perf_evlist__for_each_evsel(evlist, evsel) {
73*76ce0265SMichael Petlan perf_evsel__read(evsel, 0, 0, &counts);
74*76ce0265SMichael Petlan fprintf(stdout, "count %llu, enabled %llu, run %llu\n",
75*76ce0265SMichael Petlan counts.val, counts.ena, counts.run);
76*76ce0265SMichael Petlan }
77*76ce0265SMichael Petlan perf_evlist__close(evlist);
78*76ce0265SMichael Petlan out_evlist:
79*76ce0265SMichael Petlan perf_evlist__delete(evlist);
80*76ce0265SMichael Petlan out_threads:
81*76ce0265SMichael Petlan perf_thread_map__put(threads);
82*76ce0265SMichael Petlan return err;
83*76ce0265SMichael Petlan }
84