0001 ===================
0002 rtla-osnoise-top
0003 ===================
0004 -----------------------------------------------
0005 Display a summary of the operating system noise
0006 -----------------------------------------------
0007
0008 :Manual section: 1
0009
0010 SYNOPSIS
0011 ========
0012 **rtla osnoise top** [*OPTIONS*]
0013
0014 DESCRIPTION
0015 ===========
0016 .. include:: common_osnoise_description.rst
0017
0018 **rtla osnoise top** collects the periodic summary from the *osnoise* tracer,
0019 including the counters of the occurrence of the interference source,
0020 displaying the results in a user-friendly format.
0021
0022 The tool also allows many configurations of the *osnoise* tracer and the
0023 collection of the tracer output.
0024
0025 OPTIONS
0026 =======
0027 .. include:: common_osnoise_options.rst
0028
0029 .. include:: common_top_options.rst
0030
0031 .. include:: common_options.rst
0032
0033 EXAMPLE
0034 =======
0035 In the example below, the **rtla osnoise top** tool is set to run with a
0036 real-time priority *FIFO:1*, on CPUs *0-3*, for *900ms* at each period
0037 (*1s* by default). The reason for reducing the runtime is to avoid starving
0038 the rtla tool. The tool is also set to run for *one minute* and to display
0039 a summary of the report at the end of the session::
0040
0041 [root@f34 ~]# rtla osnoise top -P F:1 -c 0-3 -r 900000 -d 1M -q
0042 Operating System Noise
0043 duration: 0 00:01:00 | time is in us
0044 CPU Period Runtime Noise % CPU Aval Max Noise Max Single HW NMI IRQ Softirq Thread
0045 0 #59 53100000 304896 99.42580 6978 56 549 0 53111 1590 13
0046 1 #59 53100000 338339 99.36282 8092 24 399 0 53130 1448 31
0047 2 #59 53100000 290842 99.45227 6582 39 855 0 53110 1406 12
0048 3 #59 53100000 204935 99.61405 6251 33 290 0 53156 1460 12
0049
0050 SEE ALSO
0051 ========
0052
0053 **rtla-osnoise**\(1), **rtla-osnoise-hist**\(1)
0054
0055 Osnoise tracer documentation: <https://www.kernel.org/doc/html/latest/trace/osnoise-tracer.html>
0056
0057 AUTHOR
0058 ======
0059 Written by Daniel Bristot de Oliveira <bristot@kernel.org>
0060
0061 .. include:: common_appendix.rst
