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2026-06-27 - 02:29

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #2

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 rack1slot2s.osadl.org (updated Sat Jun 27, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
326126059,0sleep10-21swapper/118:51:141
271440,0ktimersoftd/229116-21perf18:51:212
304450350,0irq/25-eth10-21swapper/318:47:113
2932823521,0sleep00-21swapper/018:46:370
3365991212,0cyclictest0-21swapper/020:51:590
33679970,0cyclictest0-21swapper/222:36:442
35160,0ktimersoftd/30-21swapper/319:21:453
33669966,0cyclictest0-21swapper/120:41:461
33669960,0cyclictest0-21swapper/119:11:441
339960,0migration/38803-21sh23:56:103
339960,0migration/38607-21sh22:54:073
339960,0migration/38192-21sh00:14:563
339960,0migration/317751-21sh21:20:163
29715060,0irq/26-eth0-rx-15490-21taskset00:17:493
29715060,0irq/26-eth0-rx-0-21swapper/323:56:493
149960,0migration/030246-21sh19:31:520
33679955,0cyclictest1553-21diskmemload23:47:502
33679955,0cyclictest0-21swapper/221:00:332
33679954,0cyclictest10531-21ps23:56:462
33679950,0cyclictest1553-21diskmemload23:42:282
33679950,0cyclictest0-21swapper/222:04:252
33679950,0cyclictest0-21swapper/200:11:192
33669955,0cyclictest0-21swapper/123:25:251
33669955,0cyclictest0-21swapper/123:17:221
33669955,0cyclictest0-21swapper/123:14:421
33669955,0cyclictest0-21swapper/122:53:531
33669955,0cyclictest0-21swapper/122:26:551
33669955,0cyclictest0-21swapper/122:22:301
33669955,0cyclictest0-21swapper/100:15:141
33669950,0cyclictest0-21swapper/122:02:291
33669950,0cyclictest0-21swapper/121:53:391
33659955,0cyclictest0-21swapper/021:38:510
33659955,0cyclictest0-21swapper/021:26:140
339950,0migration/38043-21fschecks_count20:31:433
339950,0migration/37823-21munin-node20:06:473
339950,0migration/36347-21hwlatdetect19:41:443
339950,0migration/35098-21fschecks_count19:16:443
339950,0migration/34890-21munin-node19:36:553
339950,0migration/33315-21kthreadcore22:31:463
339950,0migration/332487-21taskset21:46:593
339950,0migration/328117-21kthreadcore23:06:493
339950,0migration/326649-21aten_r1power_po20:21:423
339950,0migration/326318-21cpuspeed_turbos22:26:423
339950,0migration/326282-21gltestperf19:56:443
339950,0migration/326282-21cpuspeed_turbos22:46:423
339950,0migration/324463-21diskmemload23:24:073
339950,0migration/324143-21diskmemload22:42:063
339950,0migration/32239-21fschecks_count22:11:433
339950,0migration/320661-21kthreadcore22:01:473
339950,0migration/317997-21latency_hist21:01:313
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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