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
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