1 =================== 2 rtla-osnoise-top 3 =================== 4 ----------------------------------------------- 5 Display a summary of the operating system noise 6 ----------------------------------------------- 7 8 :Manual section: 1 9 10 SYNOPSIS 11 ======== 12 **rtla osnoise top** [*OPTIONS*] 13 14 DESCRIPTION 15 =========== 16 .. include:: common_osnoise_description.rst 17 18 **rtla osnoise top** collects the periodic summary from the *osnoise* tracer, 19 including the counters of the occurrence of the interference source, 20 displaying the results in a user-friendly format. 21 22 The tool also allows many configurations of the *osnoise* tracer and the 23 collection of the tracer output. 24 25 OPTIONS 26 ======= 27 .. include:: common_osnoise_options.rst 28 29 .. include:: common_top_options.rst 30 31 .. include:: common_options.rst 32 33 EXAMPLE 34 ======= 35 In the example below, the **rtla osnoise top** tool is set to run with a 36 real-time priority *FIFO:1*, on CPUs *0-3*, for *900ms* at each period 37 (*1s* by default). The reason for reducing the runtime is to avoid starving 38 the rtla tool. The tool is also set to run for *one minute* and to display 39 a summary of the report at the end of the session:: 40 41 [root@f34 ~]# rtla osnoise top -P F:1 -c 0-3 -r 900000 -d 1M -q 42 Operating System Noise 43 duration: 0 00:01:00 | time is in us 44 CPU Period Runtime Noise % CPU Aval Max Noise Max Single HW NMI IRQ Softirq Thread 45 0 #59 53100000 304896 99.42580 6978 56 549 0 53111 1590 13 46 1 #59 53100000 338339 99.36282 8092 24 399 0 53130 1448 31 47 2 #59 53100000 290842 99.45227 6582 39 855 0 53110 1406 12 48 3 #59 53100000 204935 99.61405 6251 33 290 0 53156 1460 12 49 50 SEE ALSO 51 ======== 52 53 **rtla-osnoise**\(1), **rtla-osnoise-hist**\(1) 54 55 Osnoise tracer documentation: <https://www.kernel.org/doc/html/latest/trace/osnoise-tracer.html> 56 57 AUTHOR 58 ====== 59 Written by Daniel Bristot de Oliveira <bristot@kernel.org> 60 61 .. include:: common_appendix.rst
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