| Daniel Bristot de Oliveira | e7041c6 | 2021-12-10 19:11:30 +0100 | [diff] [blame] | 1 | =================== |
| 2 | rtla-osnoise-hist |
| 3 | =================== |
| 4 | ------------------------------------------------------ |
| 5 | Display a histogram of the osnoise tracer samples |
| 6 | ------------------------------------------------------ |
| 7 | |
| 8 | :Manual section: 1 |
| 9 | |
| 10 | SYNOPSIS |
| 11 | ======== |
| 12 | **rtla osnoise hist** [*OPTIONS*] |
| 13 | |
| 14 | DESCRIPTION |
| 15 | =========== |
| 16 | .. include:: common_osnoise_description.rst |
| 17 | |
| 18 | The **rtla osnoise hist** tool collects all **osnoise:sample_threshold** |
| 19 | occurrence in a histogram, displaying the results in a user-friendly way. |
| 20 | The tool also allows many configurations of the *osnoise* tracer and the |
| 21 | collection of the tracer output. |
| 22 | |
| 23 | OPTIONS |
| 24 | ======= |
| 25 | .. include:: common_osnoise_options.rst |
| 26 | |
| 27 | .. include:: common_hist_options.rst |
| 28 | |
| 29 | .. include:: common_options.rst |
| 30 | |
| 31 | EXAMPLE |
| 32 | ======= |
| 33 | In the example below, *osnoise* tracer threads are set to run with real-time |
| 34 | priority *FIFO:1*, on CPUs *0-11*, for *900ms* at each period (*1s* by |
| 35 | default). 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 |
| 37 | histogram 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 | |
| 56 | SEE 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 | |
| 62 | AUTHOR |
| 63 | ====== |
| 64 | Written by Daniel Bristot de Oliveira <bristot@kernel.org> |
| 65 | |
| 66 | .. include:: common_appendix.rst |