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2026-09-04 - 19:52
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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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack0slot5.osadl.org (updated Fri Sep 04, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32914839956610,0cyclictest0-21swapper/620:12:4212
32915159955633,522cyclictest0-21swapper/1319:33:425
32915159955521,44cyclictest0-21swapper/1320:55:425
32914939955242,29cyclictest0-21swapper/900:27:4215
32914839952920,506cyclictest0-21swapper/623:38:4212
32915069952315,460cyclictest0-21swapper/1120:55:423
329148799516514,2cyclictest3352354-21kworker/7:0+i915-unordered20:17:4213
3291506995127,44cyclictest0-21swapper/1123:05:423
329150699503503,0cyclictest0-21swapper/1120:31:423
329151799500499,1cyclictest0-21swapper/1423:05:426
329151799498491,4cyclictest3341256-21kworker/14:0+i915-unordered20:12:426
32915069949414,479cyclictest0-21swapper/1120:16:423
3291506994937,27cyclictest0-21swapper/1100:27:423
329151799492489,2cyclictest2973222-21kworker/14:1+i915-unordered19:27:426
329151799492489,2cyclictest2973222-21kworker/14:1+i915-unordered19:27:426
32914839949214,58cyclictest0-21swapper/621:15:2712
3291506994890,486cyclictest0-21swapper/1119:27:423
3291506994890,486cyclictest0-21swapper/1119:27:423
32915229948811,59cyclictest0-21swapper/1520:03:267
329150699486486,0cyclictest0-21swapper/1121:05:423
32915069948020,459cyclictest0-21swapper/1120:27:423
329151799478477,1cyclictest3341256-21kworker/14:0+i915-unordered20:06:426
329151799477476,1cyclictest3501238-21kworker/14:2+i915-unordered23:38:426
329147199470469,1cyclictest69750irq/159-i91500:08:429
3291517994690,467cyclictest0-21swapper/1400:08:426
329148799467466,1cyclictest0-21swapper/719:55:4213
32915159946314,29cyclictest0-21swapper/1321:14:255
32914939946314,29cyclictest0-21swapper/923:01:2515
3291506994610,461cyclictest0-21swapper/1120:06:423
32914939946113,29cyclictest0-21swapper/920:40:0415
3291479994610,459cyclictest0-21swapper/500:15:5311
32914749946114,30cyclictest0-21swapper/420:26:0310
32915229945910,30cyclictest0-21swapper/1522:21:257
329151599458453,4cyclictest1818-21snmpd21:38:555
329149099456453,3cyclictest1818-21snmpd00:28:1414
3291522994556,30cyclictest0-21swapper/1523:28:037
3291493994547,29cyclictest0-21swapper/921:36:2615
3291493994545,30cyclictest0-21swapper/919:20:2515
3291493994545,30cyclictest0-21swapper/919:20:2515
3291493994543,448cyclictest0-21swapper/900:17:2415
3291506994536,29cyclictest0-21swapper/1123:20:043
3291493994535,29cyclictest0-21swapper/921:21:2315
329149999452451,1cyclictest0-21swapper/1020:16:422
3291493994523,30cyclictest0-21swapper/919:47:2715
329150699451450,1cyclictest0-21swapper/1123:55:423
3291493994515,28cyclictest0-21swapper/921:55:2415
3291493994514,30cyclictest0-21swapper/923:35:2615
3291493994514,30cyclictest0-21swapper/921:31:2615
3291493994514,28cyclictest0-21swapper/923:07:2415
3291493994513,29cyclictest0-21swapper/922:55:2815
3291483994510,30cyclictest0-21swapper/622:55:0512
329150699450449,1cyclictest0-21swapper/1119:55:423
3291493994504,28cyclictest0-21swapper/923:19:2615
32914939945013,30cyclictest0-21swapper/920:04:3815
3291493994501,30cyclictest0-21swapper/900:09:2415
3291466994500,1cyclictest3303211-21ntpq19:15:048
3291483994491,29cyclictest0-21swapper/621:47:0512
3291483994490,30cyclictest0-21swapper/622:44:2712
3291483994490,30cyclictest0-21swapper/621:30:2412
3291483994490,30cyclictest0-21swapper/600:10:2612
329149999448448,0cyclictest0-21swapper/1020:31:422
3291493994481,30cyclictest0-21swapper/922:03:0315
3291493994470,29cyclictest0-21swapper/921:04:0315
329146699447444,3cyclictest3455993-21kworker/u64:1+events_unbound23:17:428
32915069944616,29cyclictest0-21swapper/1119:12:423
3291493994460,27cyclictest0-21swapper/922:33:0415
32914839944625,420cyclictest0-21swapper/623:29:0512
32914839944624,421cyclictest0-21swapper/623:16:0312
32914669944623,422cyclictest0-21swapper/200:05:258
3291466994460,0cyclictest0-21swapper/220:50:038
329150699445444,1cyclictest0-21swapper/1119:33:423
32914999944524,418cyclictest0-21swapper/1021:00:282
329148399445443,2cyclictest0-21swapper/621:38:5512
32914839944524,418cyclictest0-21swapper/619:26:0412
32914839944524,418cyclictest0-21swapper/619:26:0412
32914839944523,418cyclictest0-21swapper/600:18:0312
32914839944522,422cyclictest0-21swapper/620:50:2612
32914839944522,422cyclictest0-21swapper/600:29:0312
3291517994440,29cyclictest0-21swapper/1422:16:426
329147999444444,0cyclictest0-21swapper/520:27:4211
329147999444441,2cyclictest3372699-21kworker/5:1+i915-unordered20:55:4211
32915179944323,418cyclictest0-21swapper/1421:52:036
3291517994430,30cyclictest0-21swapper/1419:30:426
32915159944325,417cyclictest0-21swapper/1321:05:245
329151199443442,1cyclictest0-21swapper/1222:58:424
32915069944324,418cyclictest0-21swapper/1123:16:263
32914839944323,418cyclictest0-21swapper/619:53:2612
32914839944322,419cyclictest0-21swapper/622:06:2712
32914839944322,419cyclictest0-21swapper/622:06:2712
32914719944320,422cyclictest0-21swapper/319:32:269
32915179944223,416cyclictest0-21swapper/1423:46:426
32915159944224,418cyclictest0-21swapper/1322:37:035
329148799442441,1cyclictest1818-21snmpd21:09:1513
32914879944221,420cyclictest0-21swapper/723:54:3713
32914879944212,30cyclictest0-21swapper/700:29:3713
32914839944221,420cyclictest0-21swapper/622:16:0312
32914839944221,420cyclictest0-21swapper/620:24:2512
32914839944221,419cyclictest0-21swapper/622:48:2612
32914839944221,418cyclictest0-21swapper/622:27:0412
32914839944221,418cyclictest0-21swapper/620:07:0312
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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