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rtla-osnoise-hist
===================
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Display a histogram of the osnoise tracer samples
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: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