| =================== |
| rtla-osnoise-top |
| =================== |
| ----------------------------------------------- |
| Display a summary of the operating system noise |
| ----------------------------------------------- |
| |
| :Manual section: 1 |
| |
| SYNOPSIS |
| ======== |
| **rtla osnoise top** [*OPTIONS*] |
| |
| DESCRIPTION |
| =========== |
| .. include:: common_osnoise_description.rst |
| |
| **rtla osnoise top** collects the periodic summary from the *osnoise* tracer, |
| including the counters of the occurrence of the interference source, |
| displaying the results in a user-friendly format. |
| |
| 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_top_options.rst |
| |
| .. include:: common_options.rst |
| |
| EXAMPLE |
| ======= |
| In the example below, the **rtla osnoise top** tool is set to run with a |
| real-time priority *FIFO:1*, on CPUs *0-3*, 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* and to display |
| a summary of the report at the end of the session:: |
| |
| [root@f34 ~]# rtla osnoise top -P F:1 -c 0-3 -r 900000 -d 1M -q |
| Operating System Noise |
| duration: 0 00:01:00 | time is in us |
| CPU Period Runtime Noise % CPU Aval Max Noise Max Single HW NMI IRQ Softirq Thread |
| 0 #59 53100000 304896 99.42580 6978 56 549 0 53111 1590 13 |
| 1 #59 53100000 338339 99.36282 8092 24 399 0 53130 1448 31 |
| 2 #59 53100000 290842 99.45227 6582 39 855 0 53110 1406 12 |
| 3 #59 53100000 204935 99.61405 6251 33 290 0 53156 1460 12 |
| |
| SEE ALSO |
| ======== |
| |
| **rtla-osnoise**\(1), **rtla-osnoise-hist**\(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 |
