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2026-07-10 - 23:27

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 Fri Jul 10, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450670,0irq/25-eth10-21swapper/306:45:203
183725251,0sleep00-21swapper/006:45:320
527723424,0sleep20-21swapper/206:46:142
555323223,0sleep10-21swapper/106:49:291
56919976,0cyclictest13598-21sshd07:40:370
56939960,0cyclictest0-21swapper/208:57:372
56919960,0cyclictest3862-21diskmemload11:23:230
56919960,0cyclictest0-21swapper/011:40:340
339960,0migration/326106-21sh11:20:333
339960,0migration/320511-21sh10:00:063
339960,0migration/319472-21taskset12:00:033
339960,0migration/318438-21sh08:56:053
339960,0migration/312073-21sh09:13:543
339960,0migration/311765-21sh10:13:363
56939955,0cyclictest0-21swapper/212:11:412
56939955,0cyclictest0-21swapper/211:33:422
56939954,0cyclictest3514-21snmpd10:30:222
56939950,0cyclictest0-21swapper/210:40:052
56939950,0cyclictest0-21swapper/210:40:052
56939950,0cyclictest0-21swapper/209:03:462
56929955,0cyclictest0-21swapper/112:05:331
56929950,0cyclictest0-21swapper/109:52:391
56919955,0cyclictest3862-21diskmemload09:28:460
56919955,0cyclictest0-21swapper/011:45:180
56919955,0cyclictest0-21swapper/011:38:120
56919955,0cyclictest0-21swapper/011:13:560
56919955,0cyclictest0-21swapper/010:07:430
56919955,0cyclictest0-21swapper/009:59:400
56919955,0cyclictest0-21swapper/009:41:320
56919955,0cyclictest0-21swapper/009:20:150
56919950,0cyclictest0-21swapper/011:30:480
56919950,0cyclictest0-21swapper/009:31:360
56919950,0cyclictest0-21swapper/009:10:380
56919950,0cyclictest0-21swapper/008:05:410
339950,0migration/39214-21kthreadcore07:15:303
339950,0migration/37760-21kthreadcore09:50:303
339950,0migration/37177-21kthreadcore10:30:303
339950,0migration/34371-21idleruntime12:10:253
339950,0migration/33619-21taskset10:08:253
339950,0migration/33003-21munin-node08:45:353
339950,0migration/329832-21irqrtprio09:05:313
339950,0migration/329811-21kthreadcore11:25:293
339950,0migration/328891-21aten_r1power_po10:25:243
339950,0migration/328509-21sh10:05:023
339950,0migration/326499-21taskset07:28:263
339950,0migration/32464-21sh11:47:373
339950,0migration/322204-21kthreadcore11:00:283
339950,0migration/321856-21idleruntime09:20:273
339950,0migration/320900-21cpu10:20:243
339950,0migration/319350-21runrttasks11:38:593
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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