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2025-12-22 - 05:39

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 100 highest latencies:
System rack2slot7s.osadl.org (updated Sun Dec 21, 2025 19:55:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
739701996937,28cyclictest738391-21kworker/u8:8-xprtiod17:49:451
739701996237,22cyclictest1596109-21multi.sh18:12:071
739700996155,3cyclictest0-21swapper/017:49:470
739702995749,5cyclictest1015504-21sh17:42:272
739701995737,17cyclictest1531260-21sh18:09:281
739702995647,6cyclictest1043155-21execl17:49:452
739701995646,4cyclictest0-21swapper/117:39:491
739701995634,18cyclictest1008977-21sh17:42:111
739701995429,22cyclictest1044632-21fschecks_time17:54:411
739700995444,8cyclictest1500237-21multi.sh18:08:150
739701995323,6cyclictest1084753-21spawn18:03:021
739702995143,5cyclictest1594085-21sh18:12:022
739702995142,5cyclictest1495395-21sh18:08:042
739700995045,3cyclictest0-21swapper/017:39:480
739700994938,8cyclictest976895-21sh17:40:510
739700994842,4cyclictest1606198-21sh18:12:290
739701994719,9cyclictest673-21gmain17:34:031
739700994538,4cyclictest1460077-21sh18:04:460
739702994332,8cyclictest925661-21ls17:35:002
739701994314,7cyclictest1045798-21fstime17:56:181
739702994133,5cyclictest962419-21wc17:40:012
739700994127,11cyclictest925390-21cron17:35:000
739702993931,5cyclictest747497-21latency_hist17:30:022
739700993827,9cyclictest1044232-21fstime17:52:020
739702993729,5cyclictest1044321-21fstime17:54:562
73970199372,31cyclictest744628-21fstime17:24:491
73970099371,33cyclictest1046267-21pipe17:59:440
739702993627,6cyclictest1160942-21spawn18:03:182
739701993618,12cyclictest271ktimers/118:29:421
739701993527,5cyclictest741136-21cron17:10:011
739700993529,2cyclictest0-21swapper/018:40:010
739700993521,8cyclictest0-21swapper/018:19:460
739702993425,5cyclictest1165-21mta-sts-daemon18:34:442
739702993420,10cyclictest1623586-21needreboot18:24:422
73970299340,26cyclictest1046266-21pipe17:59:432
739701993426,5cyclictest742689-21latency_hist17:15:021
739700993427,5cyclictest744313-21sendmail17:20:010
739702993328,2cyclictest0-21swapper/218:20:012
739701993327,3cyclictest0-21swapper/118:40:011
73970299323,25cyclictest3615417-21cups-browsed17:19:452
739702993124,4cyclictest0-21swapper/217:15:012
739702993122,6cyclictest1-21systemd17:25:012
739702993119,10cyclictest1625044-21needreboot18:29:402
73970199310,26cyclictest746818-21pipe17:29:471
739700993125,4cyclictest742606-21grep17:15:010
739700993122,6cyclictest812-21cron17:10:010
73970099312,21cyclictest3615417-21cups-browsed18:24:450
739701993024,3cyclictest0-21swapper/118:20:011
739700993020,7cyclictest744575-21execl17:21:440
739700993018,10cyclictest0-21swapper/018:35:010
739702992921,5cyclictest1627375-21/usr/sbin/munin18:39:442
739701992922,4cyclictest744302-21grep17:20:011
739701992823,3cyclictest0-21swapper/117:05:011
739700992820,2cyclictest0-21swapper/017:28:120
739702992719,5cyclictest563-21avahi-daemon17:09:392
73970099270,3cyclictest171rcu_preempt18:29:430
739701992416,5cyclictest1627017-21unixbench_multi18:34:531
73970199232,16cyclictest1319-21sendmail-mta18:24:461
73970399211,10cyclictest0-21swapper/317:59:463
73970399192,7cyclictest0-21swapper/317:19:453
73970099191,10cyclictest369-21systemd-journal17:05:020
73970399185,8cyclictest0-21swapper/317:49:483
73970399174,9cyclictest0-21swapper/318:00:533
73970399174,7cyclictest0-21swapper/317:40:363
73970399173,9cyclictest0-21swapper/317:50:083
73970399172,9cyclictest0-21swapper/318:09:463
73970399162,8cyclictest0-21swapper/317:34:473
73970399161,9cyclictest0-21swapper/317:39:463
739702991610,4cyclictest739654-21/usr/sbin/munin17:05:012
73970399152,8cyclictest0-21swapper/318:10:073
73970399151,6cyclictest0-21swapper/318:39:453
73970399141,6cyclictest0-21swapper/318:19:433
73970399131,6cyclictest0-21swapper/317:26:453
73970399125,4cyclictest0-21swapper/317:24:503
73970399124,4cyclictest0-21swapper/318:24:443
73970399122,7cyclictest0-21swapper/317:14:453
73970399111,5cyclictest0-21swapper/317:10:023
73970399101,6cyclictest0-21swapper/318:34:463
73970399101,6cyclictest0-21swapper/318:29:513
7397039991,5cyclictest0-21swapper/317:05:023
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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