libperf: Add perf_evsel__enable/disable test

Add simple perf_evsel enable/disable test together with evsel counter
reading interface.

Committer testing:

  # make -C tools/perf/lib tests
  make: Entering directory '/home/acme/git/perf/tools/perf/lib'
    LINK     test-cpumap-a
    LINK     test-threadmap-a
    LINK     test-evlist-a
    LINK     test-evsel-a
    LINK     test-cpumap-so
    LINK     test-threadmap-so
    LINK     test-evlist-so
    LINK     test-evsel-so
  running static:
  - running test-cpumap.c...OK
  - running test-threadmap.c...OK
  - running test-evlist.c...OK
  - running test-evsel.c...OK
  running dynamic:
  - running test-cpumap.c...OK
  - running test-threadmap.c...OK
  - running test-evlist.c...OK
  - running test-evsel.c...OK
  make: Leaving directory '/home/acme/git/perf/tools/perf/lib'
  #

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190721112506.12306-79-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/lib/tests/test-evsel.c b/tools/perf/lib/tests/test-evsel.c
index 2687122..2c648fe 100644 (file)
--- a/tools/perf/lib/tests/test-evsel.c
+++ b/tools/perf/lib/tests/test-evsel.c
@@ -70,12 +70,55 @@ static int test_stat_thread(void)
        return 0;
 }
 
+static int test_stat_thread_enable(void)
+{
+       struct perf_counts_values counts = { .val = 0 };
+       struct perf_thread_map *threads;
+       struct perf_evsel *evsel;
+       struct perf_event_attr attr = {
+               .type     = PERF_TYPE_SOFTWARE,
+               .config   = PERF_COUNT_SW_TASK_CLOCK,
+               .disabled = 1,
+       };
+       int err;
+
+       threads = perf_thread_map__new_dummy();
+       __T("failed to create threads", threads);
+
+       perf_thread_map__set_pid(threads, 0, 0);
+
+       evsel = perf_evsel__new(&attr);
+       __T("failed to create evsel", evsel);
+
+       err = perf_evsel__open(evsel, NULL, threads);
+       __T("failed to open evsel", err == 0);
+
+       perf_evsel__read(evsel, 0, 0, &counts);
+       __T("failed to read value for evsel", counts.val == 0);
+
+       err = perf_evsel__enable(evsel);
+       __T("failed to enable evsel", err == 0);
+
+       perf_evsel__read(evsel, 0, 0, &counts);
+       __T("failed to read value for evsel", counts.val != 0);
+
+       err = perf_evsel__disable(evsel);
+       __T("failed to enable evsel", err == 0);
+
+       perf_evsel__close(evsel);
+       perf_evsel__delete(evsel);
+
+       perf_thread_map__put(threads);
+       return 0;
+}
+
 int main(int argc, char **argv)
 {
        __T_START;
 
        test_stat_cpu();
        test_stat_thread();
+       test_stat_thread_enable();
 
        __T_OK;
        return 0;