diff options
Diffstat (limited to 'tools/perf/Documentation/perf-record.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-record.txt | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 4847a793d..9b9d9d086 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -108,6 +108,8 @@ OPTIONS Number of mmap data pages (must be a power of two) or size specification with appended unit character - B/K/M/G. The size is rounded up to have nearest pages power of two value. + Also, by adding a comma, the number of mmap pages for AUX + area tracing can be specified. --group:: Put all events in a single event group. This precedes the --event @@ -145,16 +147,21 @@ OPTIONS -s:: --stat:: - Per thread counts. + Record per-thread event counts. Use it with 'perf report -T' to see + the values. -d:: --data:: - Sample addresses. + Record the sample addresses. -T:: --timestamp:: - Sample timestamps. Use it with 'perf report -D' to see the timestamps, - for instance. + Record the sample timestamps. Use it with 'perf report -D' to see the + timestamps, for instance. + +-P:: +--period:: + Record the sample period. -n:: --no-samples:: @@ -257,6 +264,18 @@ records. See clock_gettime(). In particular CLOCK_MONOTONIC and CLOCK_MONOTONIC_RAW are supported, some events might also allow CLOCK_BOOTTIME, CLOCK_REALTIME and CLOCK_TAI. +-S:: +--snapshot:: +Select AUX area tracing Snapshot Mode. This option is valid only with an +AUX area tracing event. Optionally the number of bytes to capture per +snapshot can be specified. In Snapshot Mode, trace data is captured only when +signal SIGUSR2 is received. + +--proc-map-timeout:: +When processing pre-existing threads /proc/XXX/mmap, it may take a long time, +because the file may be huge. A time out is needed in such cases. +This option sets the time out limit. The default value is 500 ms. + SEE ALSO -------- linkperf:perf-stat[1], linkperf:perf-list[1] |