diff options
| -rw-r--r-- | tools/perf/Documentation/perf-intel-pt.txt | 9 | ||||
| -rw-r--r-- | tools/perf/util/intel-pt.c | 9 |
2 files changed, 17 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-intel-pt.txt b/tools/perf/Documentation/perf-intel-pt.txt index f4cd49a7fcdb..20ac592a2641 100644 --- a/tools/perf/Documentation/perf-intel-pt.txt +++ b/tools/perf/Documentation/perf-intel-pt.txt @@ -871,7 +871,14 @@ Developer Manuals. Error events show where the decoder lost the trace. Error events are quite important. Users must know if what they are seeing is a complete -picture or not. +picture or not. The "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 The "d" option will cause the creation of a file "intel_pt.log" containing all decoded packets and instructions. Note that this option slows down the decoder diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c index 9cef46cfcf13..8b860a6f4ea9 100644 --- a/tools/perf/util/intel-pt.c +++ b/tools/perf/util/intel-pt.c @@ -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, |