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2025-11-03 - 07:17

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 Mon Nov 03, 2025 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
291350850,0irq/25-eth10-21swapper/318:36:483
1491327473,0sleep20-21swapper/218:38:052
1491225251,0sleep10-21swapper/118:38:041
1503323228,0sleep00-21swapper/018:39:320
151819977,0cyclictest13448-21diskmemload23:10:362
339960,0migration/39350-21sh23:59:413
339960,0migration/34488-21sh21:32:503
339960,0migration/33949-21sh20:51:183
339960,0migration/329171-21sh21:49:373
339960,0migration/319841-21sh22:01:273
28415060,0irq/27-eth0-tx-0-21swapper/223:52:012
28415060,0irq/27-eth0-tx-0-21swapper/223:30:532
28415060,0irq/27-eth0-tx-0-21swapper/223:23:422
28415060,0irq/27-eth0-tx-0-21swapper/223:16:102
28415060,0irq/27-eth0-tx-0-21swapper/223:08:042
28415060,0irq/27-eth0-tx-0-21swapper/223:02:042
28415060,0irq/27-eth0-tx-0-21swapper/222:51:262
28415060,0irq/27-eth0-tx-0-21swapper/222:47:212
28415060,0irq/27-eth0-tx-0-21swapper/222:29:482
28415060,0irq/27-eth0-tx-0-21swapper/222:17:452
28415060,0irq/27-eth0-tx-0-21swapper/221:59:012
28415060,0irq/27-eth0-tx-0-21swapper/221:48:272
28415060,0irq/27-eth0-tx-0-21swapper/221:35:472
28415060,0irq/27-eth0-tx-0-21swapper/221:09:212
28415060,0irq/27-eth0-tx-0-21swapper/221:03:012
28415060,0irq/27-eth0-tx-0-21swapper/220:55:552
28415060,0irq/27-eth0-tx-0-21swapper/220:46:492
28415060,0irq/27-eth0-tx-0-21swapper/200:05:512
28405060,0irq/26-eth0-rx-23164-21tr20:45:383
28405060,0irq/26-eth0-rx-21855-21diskstats22:05:323
28405060,0irq/26-eth0-rx-19493-21sh22:21:353
28405060,0irq/26-eth0-rx-15615-21which00:00:433
249960,0watchdog/20-21swapper/223:28:572
249960,0watchdog/20-21swapper/222:30:372
151819960,0cyclictest0-21swapper/223:55:322
151819960,0cyclictest0-21swapper/219:40:362
151729965,0cyclictest10856-21sed19:00:350
149960,0migration/06743-21idleruntime21:15:350
149960,0migration/031839-21latency23:50:370
149960,0migration/012987-21gltestperf23:00:340
35150,0ktimersoftd/30-21swapper/321:11:463
339950,0migration/39140-21kthreadcore21:15:383
339950,0migration/37742-21kthreadcore18:55:393
339950,0migration/36165-21timerwakeupswit20:30:423
339950,0migration/36016-21munin-node22:15:343
339950,0migration/34826-21latency_hist19:45:193
339950,0migration/331346-21kthreadcore23:10:353
339950,0migration/328291-21munin-node21:05:443
339950,0migration/327642-21irqcore23:50:353
339950,0migration/323649-21timerwakeupswit00:05:453
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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