Messages in this thread Patch in this message | | | From | Jiri Olsa <> | Subject | [PATCH] perf script: Skip dummy event attr check | Date | Wed, 31 Aug 2022 14:40:41 +0200 |
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Hongtao Yu reported problem when displaying uregs in perf script for system wide perf.data:
# perf script -F uregs | head -10 Samples for 'dummy:HG' event do not have UREGS attribute set. Cannot print 'uregs' field.
The problem is the extra dummy event added for system wide, which does not have proper sample_type setup.
Skipping attr check completely for dummy event as suggested by Namhyung, because it does not have any samples anyway.
Reported-by: Hongtao Yu <hoy@fb.com> Suggested-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Jiri Olsa <jolsa@kernel.org> --- tools/perf/builtin-script.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c index 13580a9c50b8..304d234d8e84 100644 --- a/tools/perf/builtin-script.c +++ b/tools/perf/builtin-script.c @@ -566,6 +566,8 @@ static struct evsel *find_first_output_type(struct evlist *evlist, struct evsel *evsel; evlist__for_each_entry(evlist, evsel) { + if (evsel__is_dummy_event(evsel)) + continue; if (output_type(evsel->core.attr.type) == (int)type) return evsel; } -- 2.37.2
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