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- =====================
- rtla-timerlat-hist
- =====================
- ------------------------------------------------
- Histograms of the operating system timer latency
- ------------------------------------------------
- :Manual section: 1
- SYNOPSIS
- ========
- **rtla timerlat hist** [*OPTIONS*] ...
- DESCRIPTION
- ===========
- .. include:: common_timerlat_description.rst
- The **rtla timerlat hist** displays a histogram of each tracer event
- occurrence. This tool uses the periodic information, and the
- **osnoise:** tracepoints are enabled when using the **-T** option.
- OPTIONS
- =======
- .. include:: common_timerlat_options.rst
- .. include:: common_hist_options.rst
- .. include:: common_options.rst
- EXAMPLE
- =======
- In the example below, **rtla timerlat hist** is set to run for *10* minutes,
- in the cpus *0-4*, *skipping zero* only lines. Moreover, **rtla timerlat
- hist** will change the priority of the *timerlat* threads to run under
- *SCHED_DEADLINE* priority, with a *10us* runtime every *1ms* period. The
- *1ms* period is also passed to the *timerlat* tracer::
- [root@alien ~]# timerlat hist -d 10m -c 0-4 -P d:100us:1ms -p 1ms
- # RTLA timerlat histogram
- # Time unit is microseconds (us)
- # Duration: 0 00:10:00
- Index IRQ-000 Thr-000 IRQ-001 Thr-001 IRQ-002 Thr-002 IRQ-003 Thr-003 IRQ-004 Thr-004
- 0 276489 0 206089 0 466018 0 481102 0 205546 0
- 1 318327 35487 388149 30024 94531 48382 83082 71078 388026 55730
- 2 3282 122584 4019 126527 28231 109012 23311 89309 4568 98739
- 3 940 11815 837 9863 6209 16227 6895 17196 910 9780
- 4 444 17287 424 11574 2097 38443 2169 36736 462 13476
- 5 206 43291 255 25581 1223 101908 1304 101137 236 28913
- 6 132 101501 96 64584 635 213774 757 215471 99 73453
- 7 74 169347 65 124758 350 57466 441 53639 69 148573
- 8 53 85183 31 156751 229 9052 306 9026 39 139907
- 9 22 10387 12 42762 161 2554 225 2689 19 26192
- 10 13 1898 8 5770 114 1247 128 1405 13 3772
- 11 9 560 9 924 71 686 76 765 8 713
- 12 4 256 2 360 50 411 64 474 3 278
- 13 2 167 2 172 43 256 53 350 4 180
- 14 1 88 1 116 15 198 42 223 0 115
- 15 2 63 3 94 11 139 20 150 0 58
- 16 2 37 0 56 5 78 10 102 0 39
- 17 0 18 0 28 4 57 8 80 0 15
- 18 0 8 0 17 2 50 6 56 0 12
- 19 0 9 0 5 0 19 0 48 0 18
- 20 0 4 0 8 0 11 2 27 0 4
- 21 0 2 0 3 1 9 1 18 0 6
- 22 0 1 0 3 1 7 0 3 0 5
- 23 0 2 0 4 0 2 0 7 0 2
- 24 0 2 0 2 1 3 0 3 0 5
- 25 0 0 0 1 0 1 0 1 0 3
- 26 0 1 0 0 0 2 0 2 0 0
- 27 0 0 0 3 0 1 0 0 0 1
- 28 0 0 0 3 0 0 0 1 0 0
- 29 0 0 0 2 0 2 0 1 0 3
- 30 0 1 0 0 0 0 0 0 0 0
- 31 0 1 0 0 0 0 0 2 0 2
- 32 0 0 0 1 0 2 0 0 0 0
- 33 0 0 0 2 0 0 0 0 0 1
- 34 0 0 0 0 0 0 0 0 0 2
- 35 0 1 0 1 0 0 0 0 0 1
- 36 0 1 0 0 0 1 0 1 0 0
- 37 0 0 0 1 0 0 0 0 0 0
- 40 0 0 0 0 0 1 0 1 0 0
- 41 0 0 0 0 0 0 0 0 0 1
- 42 0 0 0 0 0 0 0 0 0 1
- 44 0 0 0 0 0 1 0 0 0 0
- 46 0 0 0 0 0 0 0 1 0 0
- 47 0 0 0 0 0 0 0 0 0 1
- 50 0 0 0 0 0 0 0 0 0 1
- 54 0 0 0 1 0 0 0 0 0 0
- 58 0 0 0 1 0 0 0 0 0 0
- over: 0 0 0 0 0 0 0 0 0 0
- count: 600002 600002 600002 600002 600002 600002 600002 600002 600002 600002
- min: 0 1 0 1 0 1 0 1 0 1
- avg: 0 5 0 5 0 4 0 4 0 5
- max: 16 36 15 58 24 44 21 46 13 50
- SEE ALSO
- ========
- **rtla-timerlat**\(1), **rtla-timerlat-top**\(1)
- *timerlat* tracer documentation: <https://www.kernel.org/doc/html/latest/trace/timerlat-tracer.html>
- AUTHOR
- ======
- Written by Daniel Bristot de Oliveira <[email protected]>
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