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Diffstat (limited to 'tools/perf/Documentation/perf-intel-pt.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-intel-pt.txt | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-intel-pt.txt b/tools/perf/Documentation/perf-intel-pt.txt index d5ddb968bcf4..92464a5d7eaf 100644 --- a/tools/perf/Documentation/perf-intel-pt.txt +++ b/tools/perf/Documentation/perf-intel-pt.txt @@ -989,10 +989,13 @@ must be preceded by either '+' or '-'. The flags support by Intel PT are: -a Suppress logging of perf events +a Log all perf events + +e Output only on decoding errors (size configurable) +o Output to stdout instead of "intel_pt.log" By default, logged perf events are filtered by any specified time ranges, but -flag +a overrides that. +flag +a overrides that. The +e flag can be useful for analyzing errors. By +default, the log size in that case is 16384 bytes, but can be altered by +linkperf:perf-config[1] e.g. perf config itrace.debug-log-buffer-size=30000 In addition, the period of the "instructions" event can be specified. e.g. |