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perf intel-pt: Use itrace error flags to suppress some errors

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The itrace "e" option may be followed by flags which affect what errors
will or will not be reported.  Each flag must be preceded by either '+' or '-'.
The flags supported by Intel PT are:

		-o	Suppress overflow errors
		-l	Suppress trace data lost errors
For example, for errors but not overflow or data lost errors:

	--itrace=e-o-l

Suppressing those errors can be useful for testing and debugging because
they are not due to decoding.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/20200710151104.15137-7-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter
2020-07-10 18:10:58 +03:00
committed by Arnaldo Carvalho de Melo
parent cb971438b7
commit 1d846aeb86
2 changed files with 17 additions and 1 deletions
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9
tools/perf/util/intel-pt.c
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@@ -1863,6 +1863,15 @@ static int intel_pt_synth_error(struct intel_pt *pt, int code, int cpu,
char msg[MAX_AUXTRACE_ERROR_MSG];
int err;
if (pt->synth_opts.error_minus_flags) {
if (code == INTEL_PT_ERR_OVR &&
pt->synth_opts.error_minus_flags & AUXTRACE_ERR_FLG_OVERFLOW)
return 0;
if (code == INTEL_PT_ERR_LOST &&
pt->synth_opts.error_minus_flags & AUXTRACE_ERR_FLG_DATA_LOST)
return 0;
}
intel_pt__strerror(code, msg, MAX_AUXTRACE_ERROR_MSG);
auxtrace_synth_error(&event.auxtrace_error, PERF_AUXTRACE_ERROR_ITRACE,