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1=====================2rtla-timerlat-hist3=====================4------------------------------------------------5Histograms of the operating system timer latency6------------------------------------------------7 8:Manual section: 19 10SYNOPSIS11========12**rtla timerlat hist** [*OPTIONS*] ...13 14DESCRIPTION15===========16 17.. include:: common_timerlat_description.rst18 19The **rtla timerlat hist** displays a histogram of each tracer event20occurrence. This tool uses the periodic information, and the21**osnoise:** tracepoints are enabled when using the **-T** option.22 23OPTIONS24=======25 26.. include:: common_timerlat_options.rst27 28.. include:: common_hist_options.rst29 30.. include:: common_options.rst31 32.. include:: common_timerlat_aa.rst33 34EXAMPLE35=======36In the example below, **rtla timerlat hist** is set to run for *10* minutes,37in the cpus *0-4*, *skipping zero* only lines. Moreover, **rtla timerlat38hist** will change the priority of the *timerlat* threads to run under39*SCHED_DEADLINE* priority, with a *100us* runtime every *1ms* period. The40*1ms* period is also passed to the *timerlat* tracer. Auto-analysis is disabled41to reduce overhead ::42 43 [root@alien ~]# timerlat hist -d 10m -c 0-4 -P d:100us:1ms -p 1000 --no-aa44 # RTLA timerlat histogram45 # Time unit is microseconds (us)46 # Duration: 0 00:10:0047 Index IRQ-000 Thr-000 IRQ-001 Thr-001 IRQ-002 Thr-002 IRQ-003 Thr-003 IRQ-004 Thr-00448 0 276489 0 206089 0 466018 0 481102 0 205546 049 1 318327 35487 388149 30024 94531 48382 83082 71078 388026 5573050 2 3282 122584 4019 126527 28231 109012 23311 89309 4568 9873951 3 940 11815 837 9863 6209 16227 6895 17196 910 978052 4 444 17287 424 11574 2097 38443 2169 36736 462 1347653 5 206 43291 255 25581 1223 101908 1304 101137 236 2891354 6 132 101501 96 64584 635 213774 757 215471 99 7345355 7 74 169347 65 124758 350 57466 441 53639 69 14857356 8 53 85183 31 156751 229 9052 306 9026 39 13990757 9 22 10387 12 42762 161 2554 225 2689 19 2619258 10 13 1898 8 5770 114 1247 128 1405 13 377259 11 9 560 9 924 71 686 76 765 8 71360 12 4 256 2 360 50 411 64 474 3 27861 13 2 167 2 172 43 256 53 350 4 18062 14 1 88 1 116 15 198 42 223 0 11563 15 2 63 3 94 11 139 20 150 0 5864 16 2 37 0 56 5 78 10 102 0 3965 17 0 18 0 28 4 57 8 80 0 1566 18 0 8 0 17 2 50 6 56 0 1267 19 0 9 0 5 0 19 0 48 0 1868 20 0 4 0 8 0 11 2 27 0 469 21 0 2 0 3 1 9 1 18 0 670 22 0 1 0 3 1 7 0 3 0 571 23 0 2 0 4 0 2 0 7 0 272 24 0 2 0 2 1 3 0 3 0 573 25 0 0 0 1 0 1 0 1 0 374 26 0 1 0 0 0 2 0 2 0 075 27 0 0 0 3 0 1 0 0 0 176 28 0 0 0 3 0 0 0 1 0 077 29 0 0 0 2 0 2 0 1 0 378 30 0 1 0 0 0 0 0 0 0 079 31 0 1 0 0 0 0 0 2 0 280 32 0 0 0 1 0 2 0 0 0 081 33 0 0 0 2 0 0 0 0 0 182 34 0 0 0 0 0 0 0 0 0 283 35 0 1 0 1 0 0 0 0 0 184 36 0 1 0 0 0 1 0 1 0 085 37 0 0 0 1 0 0 0 0 0 086 40 0 0 0 0 0 1 0 1 0 087 41 0 0 0 0 0 0 0 0 0 188 42 0 0 0 0 0 0 0 0 0 189 44 0 0 0 0 0 1 0 0 0 090 46 0 0 0 0 0 0 0 1 0 091 47 0 0 0 0 0 0 0 0 0 192 50 0 0 0 0 0 0 0 0 0 193 54 0 0 0 1 0 0 0 0 0 094 58 0 0 0 1 0 0 0 0 0 095 over: 0 0 0 0 0 0 0 0 0 096 count: 600002 600002 600002 600002 600002 600002 600002 600002 600002 60000297 min: 0 1 0 1 0 1 0 1 0 198 avg: 0 5 0 5 0 4 0 4 0 599 max: 16 36 15 58 24 44 21 46 13 50100 101SEE ALSO102========103**rtla-timerlat**\(1), **rtla-timerlat-top**\(1)104 105*timerlat* tracer documentation: <https://www.kernel.org/doc/html/latest/trace/timerlat-tracer.html>106 107AUTHOR108======109Written by Daniel Bristot de Oliveira <bristot@kernel.org>110