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perf tools: Notify user when unrecognized event is specified
Previously no indication was given about what went wrong. Signed-off-by: Marti Raudsepp <marti@juffo.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <03ec9ee96f17cef05424.1256603584@localhost> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -678,6 +678,8 @@ parse_event_symbols(const char **str, struct perf_event_attr *attr)
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if (ret != EVT_FAILED)
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goto modifier;
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fprintf(stderr, "invalid or unsupported event: '%s'\n", *str);
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fprintf(stderr, "Run 'perf list' for a list of valid events\n");
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return EVT_FAILED;
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modifier:
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