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2026-08-24 - 02:34

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #6

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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  Intel
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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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack1slot6s.osadl.org (updated Mon Aug 24, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2194991140,6rtkit-daemon0-21swapper/322:54:431
32684991046,19cyclictest0-21swapper/120:53:071
3269021020,5sleep3361ktimersoftd/317:48:133
3269021020,5sleep3361ktimersoftd/317:48:133
2194991020,5rtkit-daemon2193-21rtkit-daemon22:27:442
219499950,6rtkit-daemon0-21swapper/018:34:240
219499940,6rtkit-daemon0-21swapper/018:32:010
219499940,6rtkit-daemon0-21swapper/018:32:010
3268699924,53cyclictest0-21swapper/320:09:223
219499910,6rtkit-daemon2193-21rtkit-daemon19:48:060
3268699894,78cyclictest0-21swapper/320:14:423
3268699894,77cyclictest0-21swapper/321:48:143
3268699894,77cyclictest0-21swapper/321:20:593
3268699894,65cyclictest0-21swapper/320:28:333
3268699884,77cyclictest0-21swapper/322:41:133
3268699884,77cyclictest0-21swapper/322:41:133
3268699884,77cyclictest0-21swapper/321:59:493
3268699884,77cyclictest0-21swapper/321:59:493
3268699884,77cyclictest0-21swapper/319:53:363
3268699884,77cyclictest0-21swapper/319:53:363
3268699884,77cyclictest0-21swapper/318:08:403
3268699884,75cyclictest0-21swapper/319:18:103
3268699884,75cyclictest0-21swapper/319:18:103
3268699884,56cyclictest0-21swapper/323:13:163
3268699883,50cyclictest0-21swapper/321:15:483
3268699883,50cyclictest0-21swapper/321:15:483
3268699875,65cyclictest0-21swapper/322:11:223
3268699874,76cyclictest0-21swapper/321:08:193
32686998713,66cyclictest0-21swapper/321:43:363
3268699864,76cyclictest0-21swapper/318:23:333
3268699864,75cyclictest0-21swapper/322:31:373
3268699864,61cyclictest0-21swapper/322:52:103
3268699864,47cyclictest0-21swapper/322:58:493
3268699863,75cyclictest0-21swapper/322:45:593
219499860,9rtkit-daemon0-21swapper/322:53:283
3268699854,74cyclictest0-21swapper/321:53:343
3268699854,74cyclictest0-21swapper/320:27:383
3268699854,74cyclictest0-21swapper/320:05:443
3268699854,73cyclictest0-21swapper/319:48:573
3268699853,75cyclictest0-21swapper/323:04:553
3268699844,59cyclictest0-21swapper/321:33:303
3268699844,49cyclictest0-21swapper/321:03:343
3268699844,48cyclictest0-21swapper/319:18:213
3268699839,67cyclictest1547-21nscd19:43:083
3268699839,51cyclictest0-21swapper/320:33:383
3268699839,51cyclictest0-21swapper/320:33:383
3268699834,72cyclictest0-21swapper/321:03:053
3268699833,73cyclictest0-21swapper/322:21:573
32686998310,51cyclictest0-21swapper/319:58:363
3268699824,70cyclictest0-21swapper/318:03:473
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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