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2026-03-20 - 22:30
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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 Mar 20, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
417862099521520,1cyclictest162614-21kworker/9:2+i915-unordered22:56:5515
4178643994960,496cyclictest0-21swapper/1420:53:556
417859199492491,1cyclictest0-21swapper/122:56:551
417859699479478,1cyclictest0-21swapper/221:18:558
417861599458456,2cyclictest239112-21kworker/7:2+i915-unordered00:26:5513
417861099455454,1cyclictest37956-21kworker/6:2+i915-unordered20:53:5512
417859699454424,30cyclictest0-21swapper/221:33:558
41786269945124,30cyclictest0-21swapper/1000:33:552
41786489944825,29cyclictest0-21swapper/1521:04:397
41786489944823,29cyclictest0-21swapper/1523:09:417
41786489944725,29cyclictest0-21swapper/1520:59:397
41786489944622,30cyclictest0-21swapper/1523:41:167
41786489944622,29cyclictest0-21swapper/1521:24:397
41786339944623,422cyclictest0-21swapper/1120:46:413
41786389944317,29cyclictest0-21swapper/1200:34:504
41786489944225,28cyclictest0-21swapper/1522:00:557
41786269944215,29cyclictest0-21swapper/1021:25:182
41786269944116,30cyclictest0-21swapper/1021:50:182
41786029943914,30cyclictest0-21swapper/423:52:1710
41786029943813,30cyclictest0-21swapper/420:05:4010
417863899437436,1cyclictest69750irq/159-i91521:33:554
4178626994359,29cyclictest0-21swapper/1019:40:392
4178626994358,29cyclictest0-21swapper/1021:45:162
417859699435434,1cyclictest0-21swapper/222:32:068
4178626994338,28cyclictest0-21swapper/1020:30:182
417864399432430,1cyclictest76046-21kworker/14:0+i915-unordered21:00:176
4178626994326,30cyclictest0-21swapper/1022:49:392
41786109943213,28cyclictest0-21swapper/619:45:5512
41786109943212,29cyclictest0-21swapper/623:52:5512
4178638994317,423cyclictest133-21ksoftirqd/1223:48:554
41786389943125,29cyclictest54038-21kworker/12:0-mm_percpu_wq20:40:554
4178626994317,29cyclictest0-21swapper/1020:52:172
4178626994316,29cyclictest0-21swapper/1022:05:382
4178626994316,29cyclictest0-21swapper/1019:37:172
41786109943110,29cyclictest0-21swapper/623:45:5512
4178600994318,422cyclictest0-21swapper/300:15:559
417858799431430,1cyclictest0-21swapper/019:20:300
417858799431430,1cyclictest0-21swapper/019:20:300
4178638994306,29cyclictest0-21swapper/1223:44:504
417862699430429,1cyclictest0-21swapper/1022:13:552
417862699430429,1cyclictest0-21swapper/1022:13:552
417861099430430,0cyclictest0-21swapper/619:53:5512
4178626994295,29cyclictest0-21swapper/1019:27:372
4178626994295,29cyclictest0-21swapper/1019:27:372
417860099429428,1cyclictest0-21swapper/300:07:519
4178626994281,29cyclictest0-21swapper/1020:02:402
417860099428428,0cyclictest0-21swapper/319:32:559
417860099428428,0cyclictest0-21swapper/319:32:559
4178638994273,29cyclictest0-21swapper/1221:00:554
4178626994274,29cyclictest0-21swapper/1022:24:402
4178626994274,29cyclictest0-21swapper/1022:24:402
4178626994274,29cyclictest0-21swapper/1020:07:162
4178626994272,28cyclictest0-21swapper/1000:36:382
417861799427426,1cyclictest1818-21snmpd19:20:3014
417861799427426,1cyclictest1818-21snmpd19:20:3014
4178626994260,424cyclictest0-21swapper/1023:10:382
417860299425425,0cyclictest0-21swapper/421:18:5510
4178633994246,29cyclictest0-21swapper/1121:21:553
4178610994246,28cyclictest0-21swapper/600:27:5512
41786069942425,398cyclictest0-21swapper/522:05:1711
417860299423423,0cyclictest0-21swapper/422:13:5510
417860299423423,0cyclictest0-21swapper/422:13:5510
417863399422422,0cyclictest0-21swapper/1122:32:063
41786009942025,394cyclictest0-21swapper/300:13:559
41786069941919,399cyclictest0-21swapper/522:55:1611
41786009941924,394cyclictest0-21swapper/322:26:559
41786109941824,393cyclictest0-21swapper/600:23:5512
4178610994180,29cyclictest0-21swapper/619:25:5512
4178610994180,29cyclictest0-21swapper/619:25:5512
41786069941820,397cyclictest0-21swapper/519:55:1911
41786009941823,394cyclictest0-21swapper/321:23:559
417859199418415,2cyclictest61972-21kworker/1:4+pm20:55:511
417862699417415,1cyclictest46839-21kworker/10:1+i915-unordered21:18:552
41786109941724,392cyclictest0-21swapper/600:17:5512
41786439941622,393cyclictest0-21swapper/1422:09:516
41786439941621,394cyclictest0-21swapper/1423:19:516
41786009941620,395cyclictest0-21swapper/321:28:559
41785969941622,393cyclictest0-21swapper/223:12:558
41785969941618,397cyclictest0-21swapper/220:54:518
41786489941523,392cyclictest0-21swapper/1523:02:557
41786389941522,392cyclictest0-21swapper/1220:58:554
41786109941521,393cyclictest0-21swapper/623:37:5512
417863899414413,1cyclictest69750irq/159-i91521:11:554
417862099414413,1cyclictest0-21swapper/920:55:5115
41786109941419,394cyclictest0-21swapper/619:57:5512
417860099414414,0cyclictest0-21swapper/323:29:089
417860099413413,0cyclictest0-21swapper/322:45:179
41786009941321,391cyclictest0-21swapper/323:34:519
417864899412382,30cyclictest0-21swapper/1500:26:557
41786439941212,396cyclictest0-21swapper/1420:22:556
41786389941218,393cyclictest0-21swapper/1223:13:554
417864399411408,2cyclictest124094-21kworker/14:2+events22:10:186
417864399411408,2cyclictest124094-21kworker/14:2+events22:10:186
41786339941122,388cyclictest0-21swapper/1120:38:553
41786159941117,393cyclictest0-21swapper/700:35:5513
41786009941116,394cyclictest0-21swapper/320:37:559
417863899410409,1cyclictest69750irq/159-i91500:26:554
417861599410407,3cyclictest0-21swapper/721:44:5013
417862699409406,2cyclictest189451-21kworker/u64:2+events_unbound23:41:552
41786269940912,394cyclictest0-21swapper/1021:20:172
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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