| Daniel Bristot de Oliveira | 29380d4 | 2021-12-10 19:11:31 +0100 | [diff] [blame] | 1 | ================ |
| 2 | rtla-timerlat |
| 3 | ================ |
| 4 | ------------------------------------------- |
| 5 | Measures the operating system timer latency |
| 6 | ------------------------------------------- |
| 7 | |
| 8 | :Manual section: 1 |
| 9 | |
| 10 | SYNOPSIS |
| 11 | ======== |
| 12 | **rtla timerlat** [*MODE*] ... |
| 13 | |
| 14 | DESCRIPTION |
| 15 | =========== |
| 16 | |
| 17 | .. include:: common_timerlat_description.rst |
| 18 | |
| 19 | The *timerlat* tracer outputs information in two ways. It periodically |
| 20 | prints the timer latency at the timer *IRQ* handler and the *Thread* handler. |
| 21 | It also provides information for each noise via the **osnoise:** tracepoints. |
| 22 | The **rtla timerlat top** mode displays a summary of the periodic output |
| 23 | from the *timerlat* tracer. The **rtla hist hist** mode displays a histogram |
| 24 | of each tracer event occurrence. For further details, please refer to the |
| 25 | respective man page. |
| 26 | |
| 27 | MODES |
| 28 | ===== |
| 29 | **top** |
| 30 | |
| 31 | Prints the summary from *timerlat* tracer. |
| 32 | |
| 33 | **hist** |
| 34 | |
| 35 | Prints a histogram of timerlat samples. |
| 36 | |
| 37 | If no *MODE* is given, the top mode is called, passing the arguments. |
| 38 | |
| 39 | OPTIONS |
| 40 | ======= |
| 41 | **-h**, **--help** |
| 42 | |
| 43 | Display the help text. |
| 44 | |
| 45 | For other options, see the man page for the corresponding mode. |
| 46 | |
| 47 | SEE ALSO |
| 48 | ======== |
| 49 | **rtla-timerlat-top**\(1), **rtla-timerlat-hist**\(1) |
| 50 | |
| 51 | *timerlat* tracer documentation: <https://www.kernel.org/doc/html/latest/trace/timerlat-tracer.html> |
| 52 | |
| 53 | AUTHOR |
| 54 | ====== |
| 55 | Written by Daniel Bristot de Oliveira <bristot@kernel.org> |
| 56 | |
| 57 | .. include:: common_appendix.rst |