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Diffstat (limited to 'tools/perf/Documentation/perf-record.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-record.txt | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 384c630436f8..69966abf65d1 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -367,6 +367,12 @@ options. 'perf record --dry-run -e' can act as a BPF script compiler if llvm.dump-obj in config file is set to true. +--tail-synthesize:: +Instead of collecting non-sample events (for example, fork, comm, mmap) at +the beginning of record, collect them during finalizing an output file. +The collected non-sample events reflects the status of the system when +record is finished. + --overwrite:: Makes all events use an overwritable ring buffer. An overwritable ring buffer works like a flight recorder: when it gets full, the kernel will @@ -381,6 +387,8 @@ those fitting in the ring buffer at that moment. 'overwrite' attribute can also be set or canceled for an event using config terms. For example: 'cycles/overwrite/' and 'instructions/no-overwrite/'. +Implies --tail-synthesize. + SEE ALSO -------- linkperf:perf-stat[1], linkperf:perf-list[1] |