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SubjectRe: [PATCH 3/3] perf tools: add 'keep tracking' test
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On Wed,  7 Aug 2013 16:30:31 +0300, Adrian Hunter wrote:
> Add a test for the newly added PERF_COUNT_SW_DUMMY event.
> The test checks that tracking events continue when an
> event is disabled but a dummy software event is not
> disabled.

[SNIP]

> +int test__keep_tracking(void)
> +{
> + struct perf_record_opts opts = {
> + .mmap_pages = UINT_MAX,
> + .user_freq = UINT_MAX,
> + .user_interval = ULLONG_MAX,
> + .freq = 4000,
> + .target = {
> + .uses_mmap = true,
> + },
> + };
> + struct thread_map *threads = NULL;
> + struct cpu_map *cpus = NULL;
> + struct perf_evlist *evlist = NULL;
> + struct perf_evsel *evsel = NULL;
> + int found, err = -1;
> + const char *comm;
> +
> + threads = thread_map__new(-1, getpid(), UINT_MAX);
> + CHECK_NOT_NULL__(threads);
> +
> + cpus = cpu_map__new(NULL);
> + CHECK_NOT_NULL__(cpus);
> +
> + evlist = perf_evlist__new();
> + CHECK_NOT_NULL__(evlist);
> +
> + perf_evlist__set_maps(evlist, cpus, threads);
> +
> + CHECK__(parse_events(evlist, "dummy:u"));
> + CHECK__(parse_events(evlist, "cycles:u"));
> +
> + perf_evlist__config(evlist, &opts);
> +
> + evsel = perf_evlist__first(evlist);
> +
> + evsel->attr.comm = 1;
> + evsel->attr.disabled = 1;
> + evsel->attr.enable_on_exec = 0;
> +
> + CHECK__(perf_evlist__open(evlist));
> +
> + CHECK__(perf_evlist__mmap(evlist, UINT_MAX, false));
> +
> + /*
> + * First, test that a 'comm' event can be found when the event is
> + * enabled.
> + */
> +
> + perf_evlist__enable(evlist);
> +
> + comm = "Test COMM 1";
> + CHECK__(prctl(PR_SET_NAME, (unsigned long)comm, 0, 0, 0));
> +
> + perf_evlist__disable(evlist);
> +
> + found = find_comm(evlist, comm);
> + if (found != 1) {
> + pr_debug("First time, failed to find tracking event.\n");
> + goto out_err;
> + }
> +
> + /*
> + * Secondly, test that a 'comm' event can be found when the event is
> + * disabled with the dummy event still enabled.
> + */
> +
> + perf_evlist__enable(evlist);
> +
> + evsel = perf_evlist__last(evlist);
> +
> + CHECK__(perf_evlist__disable_event(evlist, evsel));
> +
> + comm = "Test COMM 2";
> + CHECK__(prctl(PR_SET_NAME, (unsigned long)comm, 0, 0, 0));
> +
> + perf_evlist__disable(evlist);
> +
> + found = find_comm(evlist, comm);
> + if (found != 1) {
> + pr_debug("Seconf time, failed to find tracking event.\n");
> + goto out_err;
> + }
> +
> + err = 0;
> +
> +out_err:
> + if (evlist) {
> + perf_evlist__disable(evlist);

It seems the both of goto out_err already called perf_evlist__disable().

Thanks,
Namhyung


> + perf_evlist__munmap(evlist);
> + perf_evlist__close(evlist);
> + perf_evlist__delete(evlist);
> + }
> + if (cpus)
> + cpu_map__delete(cpus);
> + if (threads)
> + thread_map__delete(threads);
> +
> + return err;
> +}


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