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2026-04-28 - 06:08

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 Tue Apr 28, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3018421200,0sleep20-21swapper/221:54:042
2789828762,9sleep30-21swapper/319:08:373
2784728674,8sleep00-21swapper/019:07:580
2769328560,9sleep20-21swapper/219:05:592
2786327962,13sleep10-21swapper/119:08:111
28101992720,5cyclictest21966-21kworker/3:222:23:333
28091992726,1cyclictest0-21swapper/022:55:460
2810199250,1cyclictest0-21swapper/300:15:553
2809399250,24cyclictest0-21swapper/123:57:401
81212240,0sleep20-21swapper/222:19:402
2810199240,23cyclictest21966-21kworker/3:223:08:433
2810199230,23cyclictest0-21swapper/322:56:213
2810199230,22cyclictest21966-21kworker/3:200:04:533
2809399230,0cyclictest0-21swapper/122:27:131
48012220,0sleep30-21swapper/321:57:553
28096992221,1cyclictest32-21ksoftirqd/223:17:362
285932210,2chrt311rcuc/222:50:262
2810199200,2cyclictest0-21swapper/300:08:073
2810199200,19cyclictest0-21swapper/321:15:163
2809699203,4cyclictest0-21swapper/221:36:272
2809699200,19cyclictest0-21swapper/222:05:582
2809399207,6cyclictest7235-21munin-node00:25:581
28093992015,4cyclictest38150irq/131-snd_hda00:05:331
2809399200,2cyclictest0-21swapper/121:27:541
28101991913,5cyclictest39-21ksoftirqd/323:46:373
2810199190,0cyclictest32220-21ntpq21:35:213
2809699190,19cyclictest0-21swapper/221:20:242
2809699190,16cyclictest0-21swapper/200:05:062
2809399190,2cyclictest0-21swapper/122:55:281
2809399190,1cyclictest0-21swapper/122:23:081
2809399190,19cyclictest0-21swapper/123:22:281
2810199182,3cyclictest13071-21kworker/u8:321:44:043
2809699188,3cyclictest0-21swapper/221:40:182
28096991817,1cyclictest0-21swapper/219:14:092
28093991817,1cyclictest0-21swapper/121:41:551
2809399180,18cyclictest0-21swapper/121:58:101
2809399180,18cyclictest0-21swapper/100:18:511
2809199180,17cyclictest0-21swapper/023:27:280
2809699173,6cyclictest21147-21diskmemload23:00:002
28093991717,0cyclictest0-21swapper/121:19:341
2809399171,13cyclictest0-21swapper/123:45:151
2809399170,16cyclictest0-21swapper/121:50:081
2809199177,5cyclictest0-21swapper/020:05:010
28101991616,0cyclictest0-21swapper/323:56:593
28101991614,2cyclictest39-21ksoftirqd/323:13:223
28101991614,2cyclictest0-21swapper/322:17:123
2810199160,2cyclictest0-21swapper/321:34:243
28096991614,1cyclictest16934-21munin-run22:25:002
28093991612,3cyclictest21147-21diskmemload00:36:271
2809399160,2cyclictest0-21swapper/122:51:401
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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