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rtla-osnoise-top
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Display a summary of the operating system noise
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:Manual section: 1
SYNOPSIS
========
**rtla osnoise top** [*OPTIONS*]
DESCRIPTION
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.. include:: common_osnoise_description.rst
**rtla osnoise top** collects the periodic summary from the *osnoise* tracer,
including the counters of the occurrence of the interference source,
displaying the results in a user-friendly format.
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_top_options.rst
.. include:: common_options.rst
EXAMPLE
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In the example below, the **rtla osnoise top** tool is set to run with a
real-time priority *FIFO:1*, on CPUs *0-3*, 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* and to display
a summary of the report at the end of the session::
[root@f34 ~]# rtla osnoise top -P F:1 -c 0-3 -r 900000 -d 1M -q
Operating System Noise
duration: 0 00:01:00 | time is in us
CPU Period Runtime Noise % CPU Aval Max Noise Max Single HW NMI IRQ Softirq Thread
0 #59 53100000 304896 99.42580 6978 56 549 0 53111 1590 13
1 #59 53100000 338339 99.36282 8092 24 399 0 53130 1448 31
2 #59 53100000 290842 99.45227 6582 39 855 0 53110 1406 12
3 #59 53100000 204935 99.61405 6251 33 290 0 53156 1460 12
SEE ALSO
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**rtla-osnoise**\(1), **rtla-osnoise-hist**\(1)
Osnoise tracer documentation: <https://www.kernel.org/doc/html/latest/trace/osnoise-tracer.html>
AUTHOR
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Written by Daniel Bristot de Oliveira <bristot@kernel.org>
.. include:: common_appendix.rst