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| author | Jiri Olsa <jolsa@kernel.org> | 2021-02-08 21:08:55 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-02-11 10:02:54 -0300 |
| commit | 2d6914cd59ffb6716154f81f1c23145747887514 (patch) | |
| tree | 327e6ea1abe1f50807885868792ed5ed458dd022 /tools/perf/Documentation | |
| parent | b325f7be25f8bf8ce12f9a15b200237c1f8bcd42 (diff) | |
perf daemon: Add 'signal' command
Allow the 'perf daemon' to send SIGUSR2 to all running sessions or just
to a specific session.
Example:
# cat ~/.perfconfig
[daemon]
base=/opt/perfdata
[session-cycles]
run = -m 10M -e cycles --overwrite --switch-output -a
[session-sched]
run = -m 20M -e sched:* --overwrite --switch-output -a
Start the daemon:
# perf daemon start
Send signal to all running sessions:
# perf daemon signal
signal 12 sent to session 'cycles [773738]'
signal 12 sent to session 'sched [773739]'
Or to specific one:
# perf daemon signal --session sched
signal 12 sent to session 'sched [773739]'
And verify signals were delivered and perf.data dumped:
# cat /opt/perfdata/session-cycles/output
rounding mmap pages size to 32M (8192 pages)
[ perf record: dump data: Woken up 1 times ]
[ perf record: Dump perf.data.2021010220382490 ]
# car /opt/perfdata/session-sched/output
rounding mmap pages size to 32M (8192 pages)
[ perf record: dump data: Woken up 1 times ]
[ perf record: Dump perf.data.2021010220382489 ]
[ perf record: dump data: Woken up 1 times ]
[ perf record: Dump perf.data.2021010220393745 ]
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20210208200908.1019149-12-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation')
| -rw-r--r-- | tools/perf/Documentation/perf-daemon.txt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-daemon.txt b/tools/perf/Documentation/perf-daemon.txt index af5916d1c3e0..9cd47ec959e9 100644 --- a/tools/perf/Documentation/perf-daemon.txt +++ b/tools/perf/Documentation/perf-daemon.txt @@ -13,6 +13,7 @@ SYNOPSIS 'perf daemon' 'perf daemon' [<options>] 'perf daemon start' [<options>] +'perf daemon signal' [<options>] DESCRIPTION @@ -61,6 +62,14 @@ The start command creates the daemon process. Do not put the process in background. +SIGNAL COMMAND +-------------- +The signal command sends signal to configured sessions. + +--session:: + Send signal to specific session. + + CONFIG FILE ----------- The daemon is configured within standard perf config file by |