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| author |   Andi Kleen <ak@linux.intel.com> | 2019-03-14 15:49:55 -0700 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-03-19 11:56:20 -0300 |
| commit | 03724b2e9c45d931eff0f304f2d3363ade65ca89 (patch) | |
| tree | a5036771e339008135c20a5cbbcd9b38744f5726 /tools/perf/Documentation/perf-record.txt | |
| parent | perf list: Filter metrics too (diff) | |
| download | linux-dev-03724b2e9c45d931eff0f304f2d3363ade65ca89.tar.xz linux-dev-03724b2e9c45d931eff0f304f2d3363ade65ca89.zip | |
perf record: Allow to limit number of reported perf.data files
When doing long term recording and waiting for some event to snapshot
on, we often only care about the last minute or so.
The --switch-output command line option supports rotating the perf.data
file when the size exceeds a threshold. But the disk would still be
filled with unnecessary old files.
Add a new option to only keep a number of rotated files, so that the
disk space usage can be limited.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
LPU-Reference: 20190314225002.30108-3-andi@firstfloor.org
Link: https://lkml.kernel.org/n/tip-y5u2lik0ragt4vlktz6qc9ks@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation/perf-record.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-record.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 8f0c2be34848..8fe4dffcadd0 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -495,6 +495,10 @@ overhead. You can still switch them on with: --switch-output --no-no-buildid --no-no-buildid-cache +--switch-max-files=N:: + +When rotating perf.data with --switch-output, only keep N files. + --dry-run:: Parse options then exit. --dry-run can be used to detect errors in cmdline options. |