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2026-08-28 - 18:57

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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.
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 50 highest latencies:
System rack7slot7s.osadl.org (updated Fri Aug 28, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
857828774,9sleep00-21swapper/007:05:500
889128360,18sleep10-21swapper/107:09:531
882028370,9sleep30-21swapper/307:08:573
680128062,16sleep20-21swapper/207:05:122
264142730,1sleep2489-21cron11:40:002
274772500,0sleep20-21swapper/210:22:462
8991992522,2cyclictest16317-21head08:30:181
899199250,23cyclictest0-21swapper/111:44:101
898999250,2cyclictest0-21swapper/010:10:400
899199221,3cyclictest1206-21kworker/1:209:49:011
898999228,7cyclictest15552-21ssh10:55:000
898999220,1cyclictest0-21swapper/010:21:190
899699210,1cyclictest0-21swapper/311:00:133
899699210,0cyclictest0-21swapper/311:37:583
899499210,21cyclictest0-21swapper/211:49:002
899199210,3cyclictest0-21swapper/111:36:181
898999216,7cyclictest23296-21munin-run07:39:590
899699192,2cyclictest141rcu_preempt10:08:203
8996991912,4cyclictest0-21swapper/311:57:083
899199190,2cyclictest0-21swapper/109:13:151
898999190,4cyclictest0-21swapper/012:24:590
898999190,2cyclictest0-21swapper/012:39:490
898999190,2cyclictest0-21swapper/009:28:490
898999190,1cyclictest0-21swapper/011:59:270
898999190,1cyclictest0-21swapper/010:39:380
8996991810,7cyclictest15851-21apache211:22:033
899499180,18cyclictest0-21swapper/210:33:492
899199181,14cyclictest0-21swapper/109:52:471
898999180,1cyclictest0-21swapper/009:17:270
898999180,17cyclictest0-21swapper/009:47:320
8991991716,1cyclictest38150irq/131-snd_hda09:25:561
899199170,16cyclictest0-21swapper/110:12:401
8996991614,1cyclictest8983-21cyclictest09:28:083
8996991611,3cyclictest4198-21grep09:10:253
899699160,0cyclictest0-21swapper/311:46:343
8991991614,2cyclictest25-21ksoftirqd/109:32:551
898999161,9cyclictest0-21swapper/008:50:150
898999160,14cyclictest0-21swapper/011:14:450
898999160,11cyclictest0-21swapper/012:32:510
243222160,0chrt0-21swapper/211:19:132
899699153,7cyclictest29718-21apt-get09:00:143
8996991514,1cyclictest0-21swapper/310:04:553
899699150,2cyclictest0-21swapper/309:49:423
899499150,14cyclictest0-21swapper/211:52:322
899499150,14cyclictest0-21swapper/209:48:062
899199150,10cyclictest0-21swapper/111:17:321
898999153,6cyclictest7754-21munin-run08:15:000
898999152,2cyclictest225-21systemd-journal12:10:010
8989991511,3cyclictest30703-21wc09:00:200
898999150,12cyclictest0-21swapper/012:25:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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