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2025-12-14 - 03:27

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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.

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 376 highest latencies:
System rack2slot7s.osadl.org (updated Sat Dec 13, 2025 19:55:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2476842995949,7cyclictest2476840-21cyclictest17:28:081
2476841995734,7cyclictest171rcu_preempt18:09:430
2476842994936,8cyclictest3325576-21sh18:11:331
2476843994840,5cyclictest3346835-21sort18:12:242
2476843994840,5cyclictest2783147-21tee17:43:282
2476842994739,5cyclictest3286034-21sh18:10:011
2476841994742,3cyclictest3308125-21sh18:10:540
2476842994636,6cyclictest2783867-21multi.sh17:43:301
2476841994639,5cyclictest1142420-21cups-browsed18:20:010
2476843994536,6cyclictest3276077-21sh18:09:342
2476843994534,8cyclictest3167054-21spawn18:04:182
2476842994436,5cyclictest3369654-21systemd-run18:40:011
2476842994334,6cyclictest3198713-21Run18:04:541
2476841994133,6cyclictest2732539-21sh17:41:220
2476842994031,6cyclictest2787840-21fstime17:56:421
2476841994032,6cyclictest2703478-21munin-run17:40:010
2476843993930,5cyclictest2787840-21fstime17:56:122
2476843993927,9cyclictest2786279-21fstime17:51:232
2476841993932,5cyclictest0-21swapper/017:58:230
2476841993931,6cyclictest1166-21mta-sts-daemon17:49:430
2476842993830,6cyclictest2785987-21execl17:50:031
2476842993830,5cyclictest2786278-21fstime17:51:231
2476842993828,4cyclictest0-21swapper/117:39:411
2476843993526,5cyclictest0-21swapper/217:39:392
2476841993529,3cyclictest2918337-21spawn18:03:170
2476841993425,6cyclictest0-21swapper/018:40:000
2476841993329,2cyclictest0-21swapper/018:25:010
2476843993224,5cyclictest2785989-21execl17:49:572
2476843993224,5cyclictest2479826-21unin-run17:15:012
2476842993224,4cyclictest2482253-21latency17:24:361
2476841993227,3cyclictest2479660-21tail17:14:480
2476841993221,8cyclictest0-21swapper/017:50:110
2476843993126,2cyclictest0-21swapper/217:20:012
2476842993118,5cyclictest3363756-21cron18:20:011
2476843993022,5cyclictest1167-21mta-sts-daemon17:20:122
2476842993024,3cyclictest0-21swapper/117:35:011
2476841993026,2cyclictest0-21swapper/017:24:300
2476843992920,6cyclictest369-21systemd-journal18:20:012
2476842992921,5cyclictest2477377-21fschecks_time17:09:321
2476841992922,4cyclictest2611869-21uniq17:34:320
2476843992822,3cyclictest0-21swapper/217:34:312
2476842992818,8cyclictest3365239-21/usr/sbin/munin18:25:011
2476843992719,5cyclictest1142420-21cups-browsed18:27:532
2476841992719,6cyclictest3366397-21switchtime18:29:460
2476841992718,2cyclictest0-21swapper/017:27:380
2476843992619,4cyclictest2484721-21latency_hist17:30:022
2476843992619,4cyclictest1142420-21cups-browsed18:34:292
2476843992519,3cyclictest0-21swapper/218:40:002
2476843992517,5cyclictest2476846-21systemd-run17:05:012
247684299257,13cyclictest1142420-21cups-browsed17:14:431
2476842992519,3cyclictest0-21swapper/117:20:011
2476842992517,5cyclictest1142420-21cups-browsed18:26:361
2476841992519,4cyclictest2480532-21gltestperf17:19:330
247684499243,12cyclictest0-21swapper/318:03:183
247684499243,10cyclictest0-21swapper/318:06:363
2476843992419,2cyclictest0-21swapper/218:24:392
2476843992314,6cyclictest351ktimers/217:10:022
2476842992318,2cyclictest0-21swapper/117:05:021
2476841992317,3cyclictest0-21swapper/017:05:010
247684499224,12cyclictest0-21swapper/317:56:123
2476842992217,2cyclictest0-21swapper/118:35:011
2476841992213,6cyclictest3367526-21needreboot18:34:370
247684499215,13cyclictest0-21swapper/317:39:433
247684499213,10cyclictest0-21swapper/317:51:093
2476841992116,2cyclictest0-21swapper/017:09:320
247684499178,6cyclictest0-21swapper/317:45:283
247684499172,9cyclictest0-21swapper/318:10:113
247684499172,7cyclictest0-21swapper/317:34:363
247684499171,8cyclictest0-21swapper/317:14:433
247684499171,6cyclictest0-21swapper/318:29:383
247684499162,8cyclictest0-21swapper/318:40:003
247684499162,8cyclictest0-21swapper/317:29:403
247684499162,7cyclictest0-21swapper/317:24:403
247684499162,10cyclictest0-21swapper/317:42:583
247684499160,7cyclictest0-21swapper/318:34:383
247684499151,8cyclictest0-21swapper/317:19:403
247684499142,7cyclictest0-21swapper/318:19:393
247684499141,7cyclictest0-21swapper/317:09:373
247684499136,4cyclictest431ktimers/317:05:013
247684499131,8cyclictest0-21swapper/318:24:393
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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