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2026-04-27 - 15:06

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 Apr 27, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
584128685,0sleep10-21swapper/106:55:541
304450530,0irq/25-eth10-21swapper/306:54:473
593023625,0sleep00-21swapper/006:56:570
587023425,0sleep20-21swapper/206:56:152
60329999,0cyclictest0-21swapper/008:57:440
60339960,0cyclictest0-21swapper/111:54:201
60339960,0cyclictest0-21swapper/108:17:341
35160,0ktimersoftd/30-21swapper/311:31:593
339960,0migration/33036-21sh10:36:023
339960,0migration/32855-21sh09:54:053
339960,0migration/32697-21sh09:12:433
339960,0migration/32692-21sh10:56:053
339960,0migration/319780-21sh09:24:403
339960,0migration/317794-21sh11:03:143
339960,0migration/312324-21kthreadcore12:02:313
29715060,0irq/26-eth0-rx-9011-21python11:17:383
29715060,0irq/26-eth0-rx-14332-21tr12:22:323
29715060,0irq/26-eth0-rx-12493-21diskstats10:22:293
29715060,0irq/26-eth0-rx-0-21swapper/309:42:293
149960,0migration/05107-21kthreadcore11:17:330
149960,0migration/02143-21sh10:12:490
149960,0migration/019368-21sh09:23:290
60349955,0cyclictest0-21swapper/211:10:552
60349955,0cyclictest0-21swapper/209:46:052
60349950,0cyclictest0-21swapper/212:13:392
60349950,0cyclictest0-21swapper/211:04:172
60349950,0cyclictest0-21swapper/210:52:372
60349950,0cyclictest0-21swapper/210:31:392
60349950,0cyclictest0-21swapper/209:01:092
60349950,0cyclictest0-21swapper/207:22:282
60339955,0cyclictest0-21swapper/111:44:431
60339955,0cyclictest0-21swapper/110:02:051
60339954,0cyclictest27188-21awk07:12:321
60339950,0cyclictest4263-21diskmemload10:02:521
60339950,0cyclictest0-21swapper/112:00:291
60339950,0cyclictest0-21swapper/110:16:261
60339950,0cyclictest0-21swapper/109:33:051
60329954,0cyclictest19933-21tail08:42:340
339950,0migration/37797-21fschecks_count07:22:303
339950,0migration/34949-21kthreadcore08:32:333
339950,0migration/33662-21munin-node07:17:323
339950,0migration/33489-21hwlatdetect11:57:293
339950,0migration/332392-21kthreadcore11:12:333
339950,0migration/328917-21sh09:32:173
339950,0migration/327784-21taskset09:29:363
339950,0migration/327578-21cpuspeed_turbos11:32:283
339950,0migration/325630-21taskset07:07:493
339950,0migration/323896-21munin-node08:47:283
339950,0migration/323704-21kthreadcore09:07:333
339950,0migration/323323-21kthreadcore12:07:323
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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