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