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Man page for rtla osnoise top mode. Link: https://lkml.kernel.org/r/445aa2173ca152fc2e68719e3c1a2547dd01efd3.1639158831.git.bristot@kernel.org Cc: Tao Zhou <tao.zhou@linux.dev> Cc: Ingo Molnar <mingo@redhat.com> Cc: Tom Zanussi <zanussi@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Clark Williams <williams@redhat.com> Cc: John Kacur <jkacur@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Daniel Bristot de Oliveira <bristot@kernel.org> Cc: linux-rt-users@vger.kernel.org Cc: linux-trace-devel@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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61 lines
2.2 KiB
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===================
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rtla-osnoise-top
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===================
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-----------------------------------------------
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Display a summary of the operating system noise
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-----------------------------------------------
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:Manual section: 1
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SYNOPSIS
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========
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**rtla osnoise top** [*OPTIONS*]
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DESCRIPTION
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===========
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.. include:: common_osnoise_description.rst
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**rtla osnoise top** collects the periodic summary from the *osnoise* tracer,
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including the counters of the occurrence of the interference source,
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displaying the results in a user-friendly format.
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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_top_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, the **rtla osnoise top** tool is set to run with a
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real-time priority *FIFO:1*, on CPUs *0-3*, for *900ms* at each period
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(*1s* by default). The reason for reducing the runtime is to avoid starving
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the rtla tool. The tool is also set to run for *one minute* and to display
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a summary of the report at the end of the session::
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[root@f34 ~]# rtla osnoise top -P F:1 -c 0-3 -r 900000 -d 1M -q
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Operating System Noise
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duration: 0 00:01:00 | time is in us
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CPU Period Runtime Noise % CPU Aval Max Noise Max Single HW NMI IRQ Softirq Thread
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0 #59 53100000 304896 99.42580 6978 56 549 0 53111 1590 13
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1 #59 53100000 338339 99.36282 8092 24 399 0 53130 1448 31
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2 #59 53100000 290842 99.45227 6582 39 855 0 53110 1406 12
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3 #59 53100000 204935 99.61405 6251 33 290 0 53156 1460 12
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SEE ALSO
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========
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**rtla-osnoise**\(1), **rtla-osnoise-hist**\(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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