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2026-05-10 - 10:45

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 Sun May 10, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
265852910,0sleep00-21swapper/023:05:110
117829066,8sleep00-21swapper/019:08:150
109728864,19sleep20-21swapper/219:07:172
121928565,16sleep30-21swapper/319:08:453
126428366,13sleep10-21swapper/119:09:201
321832760,0sleep10-21swapper/122:49:061
179862290,0chrt17987-21sh23:57:323
1416992927,2cyclictest39-21ksoftirqd/323:48:473
141499280,27cyclictest0-21swapper/222:40:392
141499280,27cyclictest0-21swapper/222:40:382
1408992825,2cyclictest13-21ksoftirqd/021:10:000
140899273,3cyclictest141rcu_preempt21:10:260
1408992720,6cyclictest13-21ksoftirqd/021:50:190
141499260,22cyclictest0-21swapper/221:21:302
141499250,25cyclictest0-21swapper/221:36:012
140899253,22cyclictest13-21ksoftirqd/021:18:170
1408992321,2cyclictest13-21ksoftirqd/000:36:330
141699220,0cyclictest0-21swapper/322:09:333
1408992221,1cyclictest13-21ksoftirqd/021:46:480
141499210,21cyclictest0-21swapper/223:05:552
141499210,21cyclictest0-21swapper/222:13:432
141199217,1cyclictest20503-21apt-get21:25:121
140899214,11cyclictest13-21ksoftirqd/000:19:400
140899212,5cyclictest13-21ksoftirqd/000:27:390
140899212,5cyclictest13-21ksoftirqd/000:27:380
140899212,19cyclictest13-21ksoftirqd/023:15:510
1408992120,1cyclictest13-21ksoftirqd/023:12:020
1408992119,2cyclictest13-21ksoftirqd/023:03:260
141699201,0cyclictest0-21swapper/322:31:353
141699200,2cyclictest0-21swapper/321:34:393
140899207,2cyclictest141rcu_preempt22:21:480
140899204,8cyclictest13-21ksoftirqd/022:19:240
140899202,18cyclictest0-21swapper/020:45:140
1408992018,1cyclictest31001-21apt-get22:10:130
141699190,19cyclictest0-21swapper/323:07:303
141699190,18cyclictest0-21swapper/322:45:163
141499191,4cyclictest141rcu_preempt19:45:252
1414991914,1cyclictest32-21ksoftirqd/222:15:222
141499190,19cyclictest0-21swapper/222:54:562
141199192,16cyclictest27047-21diskmemload00:08:351
141199192,15cyclictest27047-21diskmemload23:11:321
1411991918,1cyclictest0-21swapper/119:34:541
141199190,18cyclictest0-21swapper/123:16:051
141199190,14cyclictest0-21swapper/121:39:441
1408991918,1cyclictest13-21ksoftirqd/023:38:580
1408991916,2cyclictest13-21ksoftirqd/023:22:260
1408991913,5cyclictest141rcu_preempt22:54:140
1414991816,1cyclictest31249-21ssh00:25:052
1414991816,1cyclictest31249-21ssh00:25:042
141499180,4cyclictest0-21swapper/223:53:482
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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