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diff --git a/Documentation/tools/rtla/rtla-osnoise-hist.rst b/Documentation/tools/rtla/rtla-osnoise-hist.rst new file mode 100644 index 000000000000..f2e79d22c4c4 --- /dev/null +++ b/Documentation/tools/rtla/rtla-osnoise-hist.rst @@ -0,0 +1,66 @@ +=================== +rtla-osnoise-hist +=================== +------------------------------------------------------ +Display a histogram of the osnoise tracer samples +------------------------------------------------------ + +:Manual section: 1 + +SYNOPSIS +======== +**rtla osnoise hist** [*OPTIONS*] + +DESCRIPTION +=========== +.. include:: common_osnoise_description.rst + +The **rtla osnoise hist** tool collects all **osnoise:sample_threshold** +occurrence in a histogram, displaying the results in a user-friendly way. +The tool also allows many configurations of the *osnoise* tracer and the +collection of the tracer output. + +OPTIONS +======= +.. include:: common_osnoise_options.rst + +.. include:: common_hist_options.rst + +.. include:: common_options.rst + +EXAMPLE +======= +In the example below, *osnoise* tracer threads are set to run with real-time +priority *FIFO:1*, on CPUs *0-11*, for *900ms* at each period (*1s* by +default). The reason for reducing the runtime is to avoid starving the +**rtla** tool. The tool is also set to run for *one minute*. The output +histogram is set to group outputs in buckets of *10us* and *25* entries:: + + [root@f34 ~/]# rtla osnoise hist -P F:1 -c 0-11 -r 900000 -d 1M -b 10 -E 25 + # RTLA osnoise histogram + # Time unit is microseconds (us) + # Duration: 0 00:01:00 + Index CPU-000 CPU-001 CPU-002 CPU-003 CPU-004 CPU-005 CPU-006 CPU-007 CPU-008 CPU-009 CPU-010 CPU-011 + 0 42982 46287 51779 53740 52024 44817 49898 36500 50408 50128 49523 52377 + 10 12224 8356 2912 878 2667 10155 4573 18894 4214 4836 5708 2413 + 20 8 5 12 2 13 24 20 41 29 53 39 39 + 30 1 1 0 0 10 3 6 19 15 31 30 38 + 40 0 0 0 0 0 4 2 7 2 3 8 11 + 50 0 0 0 0 0 0 0 0 0 1 1 2 + over: 0 0 0 0 0 0 0 0 0 0 0 0 + count: 55215 54649 54703 54620 54714 55003 54499 55461 54668 55052 55309 54880 + min: 0 0 0 0 0 0 0 0 0 0 0 0 + avg: 0 0 0 0 0 0 0 0 0 0 0 0 + max: 30 30 20 20 30 40 40 40 40 50 50 50 + +SEE ALSO +======== +**rtla-osnoise**\(1), **rtla-osnoise-top**\(1) + +*osnoise* tracer documentation: <https://www.kernel.org/doc/html/latest/trace/osnoise-tracer.html> + +AUTHOR +====== +Written by Daniel Bristot de Oliveira <bristot@kernel.org> + +.. include:: common_appendix.rst |