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SubjectRe: [PATCH 4/7] perf test: Basic mmap use skip
On Mon, May 16, 2022 at 8:43 PM Namhyung Kim <namhyung@kernel.org> wrote:
>
> On Thu, May 12, 2022 at 9:05 PM Ian Rogers <irogers@google.com> wrote:
> >
> > If opening the first event fails for basic mmap it is more likely
> > permission related that a true error. Mark the test as skip in this
> > case and add a skip reason.
> >
> > Signed-off-by: Ian Rogers <irogers@google.com>
> > ---
> > tools/perf/tests/mmap-basic.c | 22 ++++++++++++++++++++--
> > 1 file changed, 20 insertions(+), 2 deletions(-)
> >
> > diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
> > index c3c17600f29c..32f0a63fa157 100644
> > --- a/tools/perf/tests/mmap-basic.c
> > +++ b/tools/perf/tests/mmap-basic.c
> > @@ -31,7 +31,7 @@
> > */
> > static int test__basic_mmap(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
> > {
> > - int err = -1;
> > + int err = TEST_FAIL;
> > union perf_event *event;
> > struct perf_thread_map *threads;
> > struct perf_cpu_map *cpus;
> > @@ -83,6 +83,14 @@ static int test__basic_mmap(struct test_suite *test __maybe_unused, int subtest
> > evsels[i] = evsel__newtp("syscalls", name);
> > if (IS_ERR(evsels[i])) {
> > pr_debug("evsel__new(%s)\n", name);
> > + if (i == 0) {
> > + /*
> > + * Failure to open first event is more likely
> > + * related to permissions so flag the failure as
> > + * a skip.
> > + */
> > + err = TEST_SKIP;
>
> This is not about perf_event_open() but it accesses
> tracefs to get the type number of the trace event.
>
> The evsel__newtp() seems to return the errno in a
> negative number. It'd be better to check if it's
> -EACCES actually.

Thanks, done in v2.

Ian

> Thanks,
> Namhyung
>
>
> > + }
> > goto out_delete_evlist;
> > }
> >
> > @@ -166,4 +174,14 @@ static int test__basic_mmap(struct test_suite *test __maybe_unused, int subtest
> > return err;
> > }
> >
> > -DEFINE_SUITE("Read samples using the mmap interface", basic_mmap);
> > +static struct test_case tests__basic_mmap[] = {
> > + TEST_CASE_REASON("Read samples using the mmap interface",
> > + basic_mmap,
> > + "permissions"),
> > + { .name = NULL, }
> > +};
> > +
> > +struct test_suite suite__basic_mmap = {
> > + .desc = "Read samples using the mmap interface",
> > + .test_cases = tests__basic_mmap,
> > +};
> > --
> > 2.36.0.550.gb090851708-goog
> >

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