1=================== 2rtla-osnoise-hist 3=================== 4------------------------------------------------------ 5Display a histogram of the osnoise tracer samples 6------------------------------------------------------ 7 8:Manual section: 1 9 10SYNOPSIS 11======== 12**rtla osnoise hist** [*OPTIONS*] 13 14DESCRIPTION 15=========== 16.. include:: common_osnoise_description.rst 17 18The **rtla osnoise hist** tool collects all **osnoise:sample_threshold** 19occurrence in a histogram, displaying the results in a user-friendly way. 20The tool also allows many configurations of the *osnoise* tracer and the 21collection of the tracer output. 22 23OPTIONS 24======= 25.. include:: common_osnoise_options.rst 26 27.. include:: common_hist_options.rst 28 29.. include:: common_options.rst 30 31EXAMPLE 32======= 33In the example below, *osnoise* tracer threads are set to run with real-time 34priority *FIFO:1*, on CPUs *0-11*, for *900ms* at each period (*1s* by 35default). The reason for reducing the runtime is to avoid starving the 36**rtla** tool. The tool is also set to run for *one minute*. The output 37histogram is set to group outputs in buckets of *10us* and *25* entries:: 38 39 [root@f34 ~/]# rtla osnoise hist -P F:1 -c 0-11 -r 900000 -d 1M -b 10 -E 25 40 # RTLA osnoise histogram 41 # Time unit is microseconds (us) 42 # Duration: 0 00:01:00 43 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 44 0 42982 46287 51779 53740 52024 44817 49898 36500 50408 50128 49523 52377 45 10 12224 8356 2912 878 2667 10155 4573 18894 4214 4836 5708 2413 46 20 8 5 12 2 13 24 20 41 29 53 39 39 47 30 1 1 0 0 10 3 6 19 15 31 30 38 48 40 0 0 0 0 0 4 2 7 2 3 8 11 49 50 0 0 0 0 0 0 0 0 0 1 1 2 50 over: 0 0 0 0 0 0 0 0 0 0 0 0 51 count: 55215 54649 54703 54620 54714 55003 54499 55461 54668 55052 55309 54880 52 min: 0 0 0 0 0 0 0 0 0 0 0 0 53 avg: 0 0 0 0 0 0 0 0 0 0 0 0 54 max: 30 30 20 20 30 40 40 40 40 50 50 50 55 56SEE ALSO 57======== 58**rtla-osnoise**\(1), **rtla-osnoise-top**\(1) 59 60*osnoise* tracer documentation: <https://www.kernel.org/doc/html/latest/trace/osnoise-tracer.html> 61 62AUTHOR 63====== 64Written by Daniel Bristot de Oliveira <bristot@kernel.org> 65 66.. include:: common_appendix.rst 67