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Diffstat (limited to 'tools/perf/Documentation/perf-intel-pt.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-intel-pt.txt | 9 |
1 files changed, 8 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 |