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2025-11-26 - 05:17

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click here to display the system's profile data or here to proceed to next system.
Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot5s.osadl.org (updated Wed Nov 26, 2025 00:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4890992825,2cyclictest34-21ksoftirqd/322:00:003
488599280,1cyclictest16823-21latency_hist23:59:592
4885992718,2cyclictest313-21systemd-journal21:59:592
488599250,24cyclictest2340-21idleruntime-cro23:30:002
4877992523,1cyclictest24550-21idleruntime-cro20:55:000
488299240,23cyclictest4758-21awk23:35:001
487799240,1cyclictest13130-21turbostat22:45:000
487799240,0cyclictest0-21swapper/020:17:290
4890992321,1cyclictest24548-21cron20:55:003
489099231,21cyclictest14554-21apt-get20:35:003
489099230,22cyclictest20223-21apt-get20:47:293
489099230,22cyclictest16804-21tr00:00:003
489099230,22cyclictest15273-21sh19:29:593
489099230,22cyclictest0-21swapper/300:32:323
4885992321,1cyclictest15737-21apt-get19:32:282
4885992319,0cyclictest2151-21apt-get00:37:292
488599230,23cyclictest0-21swapper/220:57:302
4877992322,0cyclictest20793-21apt-get23:02:280
487799230,22cyclictest24906-21awk19:50:000
487799230,22cyclictest16825-21dump-pmu-power00:00:000
487799230,21cyclictest313-21systemd-journal23:00:010
487799230,1cyclictest313-21systemd-journal21:00:000
4890992222,0cyclictest4948-21apt-get20:17:293
4890992222,0cyclictest0-21swapper/321:52:313
4890992220,1cyclictest24909-21grep19:50:003
4890992220,1cyclictest20350-21sendmail-msp23:00:013
489099220,21cyclictest2091-21latency_hist20:10:003
489099220,21cyclictest0-21swapper/322:40:033
489099220,1cyclictest7862-21cron22:35:003
489099220,1cyclictest31730-21munin-run00:30:013
489099220,1cyclictest16259-21perf21:45:003
4885992220,2cyclictest0-21swapper/219:10:002
4885992220,1cyclictest0-21swapper/221:50:002
488599220,21cyclictest8319-21apt-get22:37:312
488599220,21cyclictest0-21swapper/222:52:302
488599220,21cyclictest0-21swapper/219:17:292
4882992222,0cyclictest0-21swapper/122:47:281
4882992220,1cyclictest13824-21sendmail21:39:591
488299220,0cyclictest0-21swapper/119:42:301
4877992220,1cyclictest8468-21apt-get19:17:290
487799220,21cyclictest31774-21perf21:10:000
487799220,1cyclictest22556-21apt-get00:12:290
4890992121,0cyclictest0-21swapper/323:52:313
4890992120,1cyclictest25341-21apt-get19:52:283
4890992119,2cyclictest6576-21sh21:25:003
4890992119,1cyclictest31791-21grep21:10:003
4890992119,1cyclictest15546-21munin-run22:50:003
489099210,20cyclictest0-21swapper/320:22:283
489099210,1cyclictest20081-21latency_hist19:40:013
489099210,1cyclictest0-21swapper/300:09:593
489099210,0cyclictest0-21swapper/321:37:283
489099210,0cyclictest0-21swapper/320:37:273
4885992121,0cyclictest0-21swapper/223:37:322
4885992120,1cyclictest7762-21apt-get20:22:292
4885992120,1cyclictest26318-21apt-get22:07:322
488599210,20cyclictest12464-21apt-get23:52:302
488599210,20cyclictest0-21swapper/221:40:002
488599210,20cyclictest0-21swapper/221:07:292
488599210,20cyclictest0-21swapper/220:07:292
488599210,20cyclictest0-21swapper/200:02:292
488599210,1cyclictest1768-21dump-pmu-power21:15:012
488599210,0cyclictest0-21swapper/221:42:302
4882992121,0cyclictest30158-21apt-get20:02:301
4882992120,1cyclictest14863-21apt-get23:57:301
4882992119,1cyclictest4948-21apt-get20:17:291
4882992119,1cyclictest19106-21apt-get21:52:311
488299210,21cyclictest0-21swapper/120:57:291
488299210,20cyclictest0-21swapper/100:37:301
488299210,0cyclictest0-21swapper/123:47:301
4877992121,0cyclictest0-21swapper/019:42:290
4877992121,0cyclictest0-21swapper/000:22:290
4877992120,0cyclictest2788-21apt-get23:32:300
487799210,21cyclictest0-21swapper/022:50:000
487799210,21cyclictest0-21swapper/021:32:300
487799210,21cyclictest0-21swapper/020:35:000
487799210,20cyclictest0-21swapper/021:47:290
487799210,20cyclictest0-21swapper/000:32:310
487799210,1cyclictest23466-21awk22:00:000
487799210,0cyclictest0-21swapper/023:52:310
4890992020,0cyclictest0-21swapper/323:22:273
4890992020,0cyclictest0-21swapper/323:02:273
4890992020,0cyclictest0-21swapper/319:10:013
489099200,0cyclictest0-21swapper/323:27:293
489099200,0cyclictest0-21swapper/320:02:303
4885992020,0cyclictest7614-21apt-get23:42:302
4885992020,0cyclictest0-21swapper/223:32:302
4885992020,0cyclictest0-21swapper/222:17:302
4885992020,0cyclictest0-21swapper/221:02:282
4885992020,0cyclictest0-21swapper/220:42:322
4885992020,0cyclictest0-21swapper/220:37:272
4885992020,0cyclictest0-21swapper/200:27:292
4885992018,1cyclictest21071-21munin-run21:55:002
488599200,0cyclictest7040-21apt-get21:27:292
488599200,0cyclictest32165-21apt-get00:32:322
488599200,0cyclictest20160-21apt-get00:07:292
488599200,0cyclictest0-21swapper/220:02:292
488599200,0cyclictest0-21swapper/219:42:302
4882992020,0cyclictest0-21swapper/123:52:311
4882992020,0cyclictest0-21swapper/123:37:321
4882992020,0cyclictest0-21swapper/122:32:291
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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