Based on kernel version 6.8. Page generated on 2024-03-11 21:26 EST.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 | ===================== 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 .. include:: common_timerlat_aa.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 *100us* runtime every *1ms* period. The *1ms* period is also passed to the *timerlat* tracer. Auto-analysis is disabled to reduce overhead :: [root@alien ~]# timerlat hist -d 10m -c 0-4 -P d:100us:1ms -p 1000 --no-aa # 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 <bristot@kernel.org> |