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| author | Daniel Bristot de Oliveira <bristot@kernel.org> | 2023-06-06 18:12:20 +0200 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2023-06-13 22:35:46 +0200 |
| commit | 2091336b9a8b5a2a59cdd5c468df62a4b562875f (patch) | |
| tree | e236b74a21695d04fcdb8bb929a1fc3633d49c7b /Documentation/tools | |
| parent | rtla/timerlat: Give timerlat auto analysis its own instance (diff) | |
| download | linux-2091336b9a8b5a2a59cdd5c468df62a4b562875f.tar.xz linux-2091336b9a8b5a2a59cdd5c468df62a4b562875f.zip | |
rtla/timerlat_hist: Add auto-analysis support
Add auto-analysis to timerlat hist, including the --no-aa option to
reduce overhead and --dump-task. --aa-only was not added as it is
already on timerlat top.
Link: https://lkml.kernel.org/r/c2693f47ee83e659a7723fed8035f5d2534f528e.1686066600.git.bristot@kernel.org
Cc: William White <chwhite@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Tested-by: Juri Lelli <juri.lelli@redhat.com>
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_timerlat_aa.rst | 7 | ||||
| -rw-r--r-- | Documentation/tools/rtla/rtla-timerlat-hist.rst | 7 | ||||
| -rw-r--r-- | Documentation/tools/rtla/rtla-timerlat-top.rst | 7 |
3 files changed, 12 insertions, 9 deletions
diff --git a/Documentation/tools/rtla/common_timerlat_aa.rst b/Documentation/tools/rtla/common_timerlat_aa.rst index 795b9fbcbc6d..077029e6b289 100644 --- a/Documentation/tools/rtla/common_timerlat_aa.rst +++ b/Documentation/tools/rtla/common_timerlat_aa.rst @@ -5,10 +5,3 @@ **--no-aa** disable auto-analysis, reducing rtla timerlat cpu usage - -**--aa-only** *us* - - Set stop tracing conditions and run without collecting and displaying statistics. - Print the auto-analysis if the system hits the stop tracing condition. This option - is useful to reduce rtla timerlat CPU, enabling the debug without the overhead of - collecting the statistics. diff --git a/Documentation/tools/rtla/rtla-timerlat-hist.rst b/Documentation/tools/rtla/rtla-timerlat-hist.rst index 6bf7f0ca4556..057db78d4095 100644 --- a/Documentation/tools/rtla/rtla-timerlat-hist.rst +++ b/Documentation/tools/rtla/rtla-timerlat-hist.rst @@ -29,15 +29,18 @@ OPTIONS .. include:: common_options.rst +.. include:: common_timerlat_aa.rst + EXAMPLE ======= In the example below, **rtla timerlat hist** is set to run for *10* minutes, in the cpus *0-4*, *skipping zero* only lines. Moreover, **rtla timerlat hist** will change the priority of the *timerlat* threads to run under *SCHED_DEADLINE* priority, with a *10us* runtime every *1ms* period. The -*1ms* period is also passed to the *timerlat* tracer:: +*1ms* period is also passed to the *timerlat* tracer. Auto-analysis is disabled +to reduce overhead :: - [root@alien ~]# timerlat hist -d 10m -c 0-4 -P d:100us:1ms -p 1ms + [root@alien ~]# timerlat hist -d 10m -c 0-4 -P d:100us:1ms -p 1ms --no-aa # RTLA timerlat histogram # Time unit is microseconds (us) # Duration: 0 00:10:00 diff --git a/Documentation/tools/rtla/rtla-timerlat-top.rst b/Documentation/tools/rtla/rtla-timerlat-top.rst index 73799c1150ad..1b7cf4e3eafe 100644 --- a/Documentation/tools/rtla/rtla-timerlat-top.rst +++ b/Documentation/tools/rtla/rtla-timerlat-top.rst @@ -32,6 +32,13 @@ OPTIONS .. include:: common_timerlat_aa.rst +**--aa-only** *us* + + Set stop tracing conditions and run without collecting and displaying statistics. + Print the auto-analysis if the system hits the stop tracing condition. This option + is useful to reduce rtla timerlat CPU, enabling the debug without the overhead of + collecting the statistics. + EXAMPLE ======= |