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