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2026-09-16 - 23:03

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 Wed Sep 16, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
186929573,16sleep00-21swapper/007:05:220
327528472,8sleep30-21swapper/307:07:263
326928471,9sleep20-21swapper/207:07:202
336828265,13sleep10-21swapper/107:08:361
356899280,3cyclictest0-21swapper/209:37:262
356199288,3cyclictest141rcu_preempt09:05:160
356899270,0cyclictest0-21swapper/209:12:202
356199260,26cyclictest0-21swapper/011:02:160
3561992520,1cyclictest13-21ksoftirqd/010:09:310
136092250,0sleep20-21swapper/212:15:022
357199240,23cyclictest0-21swapper/310:07:403
356899240,0cyclictest0-21swapper/210:41:512
356699248,3cyclictest452-21systemd-logind12:03:561
3561992420,3cyclictest13-21ksoftirqd/009:21:500
3561992420,1cyclictest13-21ksoftirqd/011:47:020
356899230,23cyclictest0-21swapper/210:22:322
356899230,23cyclictest0-21swapper/210:22:322
356899230,23cyclictest0-21swapper/210:11:112
356699233,5cyclictest10690-21munin-run07:25:001
3561992319,1cyclictest13-21ksoftirqd/010:28:160
356199230,20cyclictest0-21swapper/010:20:130
356199230,20cyclictest0-21swapper/010:20:130
357199220,22cyclictest21322-21kworker/3:010:18:023
356899220,19cyclictest0-21swapper/210:47:542
356899220,0cyclictest0-21swapper/210:59:272
3561992220,2cyclictest13-21ksoftirqd/009:46:400
3561992217,5cyclictest13-21ksoftirqd/010:55:020
356199220,1cyclictest0-21swapper/009:14:570
356899211,1cyclictest141rcu_preempt09:55:162
356899210,0cyclictest0-21swapper/212:21:572
356699210,1cyclictest0-21swapper/109:35:261
356899200,3cyclictest0-21swapper/210:52:532
356899200,20cyclictest0-21swapper/211:09:392
3561992015,1cyclictest13-21ksoftirqd/010:01:170
356199200,19cyclictest2286-21sh12:26:560
3571991917,1cyclictest39-21ksoftirqd/309:35:323
3568991918,1cyclictest0-21swapper/211:02:162
356899190,2cyclictest0-21swapper/210:33:222
356899190,1cyclictest0-21swapper/212:08:142
356899190,19cyclictest0-21swapper/212:31:472
356199192,3cyclictest141rcu_preempt09:53:440
3561991918,1cyclictest0-21swapper/009:15:460
3571991813,3cyclictest0-21swapper/311:43:083
357199181,17cyclictest27091-21kworker/3:109:43:123
3568991817,1cyclictest0-21swapper/210:19:052
3568991817,1cyclictest0-21swapper/209:32:042
356899180,1cyclictest0-21swapper/211:22:102
356899180,16cyclictest0-21swapper/210:38:282
356699189,2cyclictest28788-21sed11:25:171
356699188,4cyclictest25356-21apache211:52:381
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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