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2026-06-24 - 10:24

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 Wed Jun 24, 2026 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
90782840,4sleep337-21ksoftirqd/323:17:013
10583997255,10cyclictest27739-21aten_r1power_en22:10:371
1058599715,53cyclictest0-21swapper/323:39:273
1058599714,59cyclictest0-21swapper/320:51:563
10584996838,13cyclictest0-21swapper/221:15:292
10583996838,15cyclictest0-21swapper/122:35:391
10584996739,13cyclictest0-21swapper/220:49:222
1058599666,16cyclictest0-21swapper/323:24:583
10584996638,12cyclictest0-21swapper/221:55:462
1058599654,55cyclictest0-21swapper/320:09:433
1058599652,25cyclictest0-21swapper/322:57:393
10584996534,13cyclictest0-21swapper/222:03:152
10584996435,13cyclictest0-21swapper/222:55:582
10584996434,13cyclictest0-21swapper/223:05:532
10583996444,14cyclictest0-21swapper/121:24:501
1058199643,38cyclictest0-21swapper/022:09:410
1058599635,51cyclictest0-21swapper/319:10:343
1058599634,53cyclictest0-21swapper/300:05:443
1058599634,50cyclictest30726-21date21:25:293
1058599634,35cyclictest0-21swapper/321:55:493
1058599634,15cyclictest0-21swapper/321:37:583
10584996334,13cyclictest0-21swapper/221:53:592
219499620,4rtkit-daemon2193-21rtkit-daemon23:01:043
126392620,11sleep1201ktimersoftd/121:45:591
126392620,11sleep1201ktimersoftd/121:45:591
119782623,52sleep012103-21sed20:56:040
1058599625,15cyclictest0-21swapper/322:16:273
1058599625,14cyclictest0-21swapper/321:49:513
1058599625,14cyclictest0-21swapper/321:49:513
1058599624,52cyclictest0-21swapper/323:46:143
1058599624,52cyclictest0-21swapper/323:46:143
10585996222,35cyclictest0-21swapper/320:57:143
10585996217,23cyclictest6593-21awk20:50:283
10584996236,11cyclictest0-21swapper/222:38:252
10584996235,12cyclictest0-21swapper/221:45:272
10584996235,12cyclictest0-21swapper/221:26:342
10584996233,14cyclictest0-21swapper/222:10:582
10583996238,17cyclictest1766-21ssh21:30:551
251332613,12sleep20-21swapper/222:54:112
1058599615,50cyclictest0-21swapper/323:58:133
1058599615,30cyclictest0-21swapper/322:41:013
1058599615,16cyclictest0-21swapper/323:55:153
1058599615,16cyclictest0-21swapper/321:03:353
1058599614,52cyclictest0-21swapper/322:37:023
1058599614,12cyclictest25642-21users23:41:013
10585996122,15cyclictest0-21swapper/322:24:173
1058499614,49cyclictest0-21swapper/220:30:442
10581996128,14cyclictest0-21swapper/023:40:510
1058599607,29cyclictest0-21swapper/323:30:543
1058599605,49cyclictest0-21swapper/321:18:593
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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