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| author | Daniel Bristot de Oliveira <bristot@kernel.org> | 2022-03-02 20:01:33 +0100 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2022-03-15 14:36:49 -0400 |
| commit | 1a754893653f73724d007c2cf95cf6c47d5114c4 (patch) | |
| tree | d533848e053f10fb28b849b7ebcb68e7e1166ace /Documentation/tools | |
| parent | 336c92b26cf9aee6c5d5907ef49b90d2665e9d70 (diff) | |
| download | lwn-1a754893653f73724d007c2cf95cf6c47d5114c4.tar.gz lwn-1a754893653f73724d007c2cf95cf6c47d5114c4.zip | |
rtla: Add --trigger support
Add --trigger option. This option enables a trace event trigger to the
previous -e sys:event argument, allowing some advanced tracing options.
For instance, in a system with CPUs 2:23 isolated, it is possible to get
a stack trace of thread wakeup targeting those CPUs while running
osnoise with the following command line:
# osnoise top -c 2-23 -a 50 -e sched:sched_wakeup --trigger="stacktrace if target_cpu >= 2"
This option is available for all current tools.
Link: https://lkml.kernel.org/r/07d2983d5f71261d4da89dbaf02efcad100ab8ee.1646247211.git.bristot@kernel.org
Cc: Daniel Bristot de Oliveira <bristot@kernel.org>
Cc: Clark Williams <williams@redhat.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'Documentation/tools')
| -rw-r--r-- | Documentation/tools/rtla/common_options.rst | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/tools/rtla/common_options.rst b/Documentation/tools/rtla/common_options.rst index 89d783dc3304..e5870b944334 100644 --- a/Documentation/tools/rtla/common_options.rst +++ b/Documentation/tools/rtla/common_options.rst @@ -18,6 +18,9 @@ Enable an event in the trace (**-t**) session. The argument can be a specific event, e.g., **-e** *sched:sched_switch*, or all events of a system group, e.g., **-e** *sched*. Multiple **-e** are allowed. It is only active when **-t** or **-a** are set. +**--trigger** *<trigger>* + Enable a trace event trigger to the previous **-e** *sys:event*. For further information about event trigger see https://www.kernel.org/doc/html/latest/trace/events.html#event-triggers. + **-P**, **--priority** *o:prio|r:prio|f:prio|d:runtime:period* Set scheduling parameters to the osnoise tracer threads, the format to set the priority are: |