From 1a754893653f73724d007c2cf95cf6c47d5114c4 Mon Sep 17 00:00:00 2001 From: Daniel Bristot de Oliveira Date: Wed, 2 Mar 2022 20:01:33 +0100 Subject: 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 Cc: Clark Williams Cc: Juri Lelli Cc: Jonathan Corbet Signed-off-by: Daniel Bristot de Oliveira Signed-off-by: Steven Rostedt (Google) --- Documentation/tools/rtla/common_options.rst | 3 +++ 1 file changed, 3 insertions(+) (limited to 'Documentation/tools') 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** ** + 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: -- cgit v1.2.3