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SubjectRe: [PATCH v3]: perf record: enable arbitrary event names thru name= modifier
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Hi,
On 04.06.2018 22:16, Arnaldo Carvalho de Melo wrote:
> Em Mon, Jun 04, 2018 at 06:22:43PM +0300, Alexey Budankov escreveu:
>> On 04.06.2018 17:58, Arnaldo Carvalho de Melo wrote:
>>> Em Mon, Jun 04, 2018 at 05:51:03PM +0300, Alexey Budankov escreveu:
>>>> event names quoted there. If such cases were pointed out then they also
>>>> could be addressed along with the unit/regression testing mentioned above.
>
>>> So lests stick to just the unit/regression testing, can you take a look
>>> at that?
>
>> Sure. Is it enough to run perf record with some quoted event name to make
>> sure it runs successfully?
>
> I mentioned tools/perf/tests/attr/, for checking if the perf_event_attr
> was setup the way you intended, and tools/perf/tests/parse-events.c,
> which probably is what we want here, see, for instance, this cset I've
> added recently to have we testing intel_pt event parsing:
>
> $ git show b3f58c8da64bc63bd0c0a06a4e2cf258a3d20be6
> commit b3f58c8da64bc63bd0c0a06a4e2cf258a3d20be6
> Author: Arnaldo Carvalho de Melo <acme@redhat.com>
> Date: Fri May 11 11:48:54 2018 -0300
>
> perf tests parse-events: Add intel_pt parse test
>
> To avoid regressions such as the one fixed by 4a35a9027f64 ("Revert
> "perf pmu: Fix pmu events parsing rule""), where '-e intel_pt//u' got
> broken, with this new entry in this 'perf tests' subtest, we would have
> caught it before pushing upstream.
>
> Acked-by: Jiri Olsa <jolsa@kernel.org>
> Cc: Adrian Hunter <adrian.hunter@intel.com>
> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> Cc: Andi Kleen <ak@linux.intel.com>
> Cc: David Ahern <dsahern@gmail.com>
> Cc: Jiri Olsa <jolsa@kernel.org>
> Cc: Kan Liang <kan.liang@linux.intel.com>
> Cc: Namhyung Kim <namhyung@kernel.org>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Wang Nan <wangnan0@huawei.com>
> Link: https://lkml.kernel.org/n/tip-kw62fys9bwdgsp722so2ln1l@git.kernel.org
> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
>
> diff --git a/tools/perf/tests/parse-events.c b/tools/perf/tests/parse-events.c
> index 18b06444f230..6829dd416a99 100644
> --- a/tools/perf/tests/parse-events.c
> +++ b/tools/perf/tests/parse-events.c
> @@ -1309,6 +1309,14 @@ static int test__checkevent_config_cache(struct perf_evlist *evlist)
> return 0;
> }
>
> +static int test__intel_pt(struct perf_evlist *evlist)
> +{
> + struct perf_evsel *evsel = perf_evlist__first(evlist);
> +
> + TEST_ASSERT_VAL("wrong name setting", strcmp(evsel->name, "intel_pt//u") == 0);
> + return 0;
> +}
> +
> static int count_tracepoints(void)
> {
> struct dirent *events_ent;
> @@ -1637,6 +1645,11 @@ static struct evlist_test test__events[] = {
> .check = test__checkevent_config_cache,
> .id = 51,
> },
> + {
> + .name = "intel_pt//u",
> + .check = test__intel_pt,
> + .id = 52,
> + },
> };
>
> static struct evlist_test test__events_pmu[] = {
>
> See also this one:
>
> static int
> test__checkevent_breakpoint_len_rw_modifier(struct perf_evlist *evlist)
> {
> struct perf_evsel *evsel = perf_evlist__first(evlist);
>
> TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
> TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
> TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
> TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
>
> return test__checkevent_breakpoint_rw(evlist);
> }
> {
> .name = "mem:0/4:rw:u",
> .check = test__checkevent_breakpoint_len_rw_modifier,
> .id = 44
> },
>
>
> I.e. have as many TEST_ASSERT_VAL as you need, checking how parsing the
> event name ends up setting up the evsel, evlist and perf_event_attr.

Ok, I see. But please expect delay in delivery since I am on vacations till 06/18.

Thanks,
Alexey

>
> - Arnaldo
>

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