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2026-04-10 - 08:15
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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 Apr 10, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31424399549547,1cyclictest572564-21kworker/1:2+i915-unordered00:37:171
31427299548516,31cyclictest0-21swapper/900:37:1715
3142679951716,500cyclictest0-21swapper/723:28:1713
31427299513512,1cyclictest540491-21kworker/9:0+i915-unordered00:11:1715
31424099504503,1cyclictest0-21swapper/023:00:170
31424399483482,1cyclictest0-21swapper/100:11:171
31426999472470,1cyclictest500056-21kworker/8:2+i915-unordered23:00:1714
3142489947115,58cyclictest0-21swapper/223:43:018
3142679946924,29cyclictest0-21swapper/721:56:1713
3142629946917,29cyclictest0-21swapper/620:24:3812
3142589946922,446cyclictest70-21ksoftirqd/519:47:1711
314251994690,468cyclictest0-21swapper/323:52:179
3142519946716,30cyclictest539525-21smart_nvme0n123:44:409
3142629946217,29cyclictest0-21swapper/623:50:0112
3142519946119,30cyclictest0-21swapper/323:17:179
3142629945914,29cyclictest0-21swapper/621:59:0112
3142489945910,30cyclictest0-21swapper/219:20:038
3142629945811,30cyclictest0-21swapper/621:49:3912
3142629945711,30cyclictest0-21swapper/620:38:0212
314251994559,30cyclictest0-21swapper/321:33:389
31425199454396,29cyclictest0-21swapper/321:51:179
314251994520,451cyclictest0-21swapper/300:12:179
31424399452450,2cyclictest0-21swapper/120:13:171
31429599450447,2cyclictest510948-21kworker/u64:7+events_unbound23:20:176
31427299450449,1cyclictest69750irq/159-i91520:13:1715
3142629944823,30cyclictest0-21swapper/600:09:4112
3142629944822,29cyclictest0-21swapper/622:18:4112
3143009944722,30cyclictest0-21swapper/1521:20:027
314269994450,27cyclictest0-21swapper/822:58:3814
31425499445444,1cyclictest0-21swapper/400:37:1710
31425499444443,1cyclictest532158-21kworker/4:2+i915-unordered23:42:1710
3142519944424,419cyclictest0-21swapper/320:26:019
3142929944324,419cyclictest0-21swapper/1321:34:405
314258994430,29cyclictest0-21swapper/523:16:1711
3142699944219,29cyclictest0-21swapper/821:07:0114
3142589944224,417cyclictest0-21swapper/521:22:1711
31425499442440,2cyclictest391569-21kworker/4:1+i915-unordered20:46:1710
31427799441437,3cyclictest1818-21snmpd22:20:502
3142629944117,29cyclictest0-21swapper/621:20:4012
3142859944017,422cyclictest0-21swapper/1100:30:413
3142699944022,417cyclictest0-21swapper/821:18:0014
3142519944021,418cyclictest0-21swapper/323:31:009
3142519944021,418cyclictest0-21swapper/321:48:389
3142859943918,419cyclictest0-21swapper/1119:40:403
3142859943917,420cyclictest0-21swapper/1123:03:023
3142629943915,28cyclictest0-21swapper/623:09:0112
3142629943913,29cyclictest0-21swapper/622:04:0112
3142519943919,420cyclictest0-21swapper/300:29:389
3142629943827,411cyclictest0-21swapper/622:12:1712
3142629943813,29cyclictest0-21swapper/622:06:0212
3142589943819,418cyclictest0-21swapper/523:01:0311
3142519943816,420cyclictest0-21swapper/320:21:399
3142489943813,30cyclictest0-21swapper/221:10:398
3142779943721,415cyclictest0-21swapper/1019:30:172
3142679943720,416cyclictest0-21swapper/700:06:1713
3142629943712,29cyclictest0-21swapper/619:39:0312
3142589943720,416cyclictest0-21swapper/519:57:1711
3142589943720,416cyclictest0-21swapper/519:57:1711
3142519943718,419cyclictest0-21swapper/321:35:019
3142489943721,414cyclictest0-21swapper/200:23:178
3142859943615,419cyclictest0-21swapper/1120:58:023
3142859943615,418cyclictest0-21swapper/1123:47:013
31426999436436,0cyclictest0-21swapper/822:24:1314
3142629943612,28cyclictest0-21swapper/620:41:0212
3142519943617,418cyclictest0-21swapper/322:17:029
3142519943616,419cyclictest0-21swapper/323:13:399
3143009943522,412cyclictest0-21swapper/1520:48:177
3142779943513,418cyclictest0-21swapper/1021:48:012
3142699943516,419cyclictest0-21swapper/800:12:0214
31428799434433,1cyclictest69750irq/159-i91500:37:174
31427799434433,1cyclictest0-21swapper/1019:20:182
3142699943415,418cyclictest0-21swapper/821:13:5914
3142629943410,29cyclictest0-21swapper/620:15:4012
31425899434434,0cyclictest0-21swapper/522:24:1311
31425499434433,1cyclictest0-21swapper/421:57:1710
31424899434433,1cyclictest0-21swapper/220:13:178
3142629943313,417cyclictest0-21swapper/622:35:0012
3142589943317,415cyclictest0-21swapper/520:22:1711
31428799432432,0cyclictest69750irq/159-i91523:42:174
3142779943218,413cyclictest0-21swapper/1021:19:132
3142779943211,420cyclictest0-21swapper/1023:59:392
31426799432430,1cyclictest468002-21kworker/7:2+i915-unordered22:23:1713
314269994317,28cyclictest0-21swapper/820:44:0214
3142629943111,418cyclictest0-21swapper/622:50:5912
3142629943111,418cyclictest0-21swapper/622:50:5912
3142629943111,417cyclictest0-21swapper/623:02:0212
31428799430429,1cyclictest69750irq/159-i91520:46:174
3142699943013,416cyclictest0-21swapper/819:44:4114
3142629943013,415cyclictest0-21swapper/623:41:0012
31425899430428,2cyclictest484138-21kworker/5:2+pm22:49:5311
31425899430428,2cyclictest484138-21kworker/5:2+pm22:49:5311
31425499430427,2cyclictest0-21swapper/422:42:1710
31424099430428,1cyclictest0-21swapper/022:42:170
3142679942914,414cyclictest0-21swapper/721:00:1713
31425199429427,1cyclictest0-21swapper/323:29:129
314269994289,418cyclictest0-21swapper/823:24:0314
31425499428426,2cyclictest536355-21kworker/4:1+i915-unordered23:46:1710
3142519942817,410cyclictest0-21swapper/322:44:139
31424399428426,1cyclictest439899-21kworker/1:0+i915-unordered21:46:031
31424099428425,2cyclictest548271-21kworker/u64:1+events_unbound00:16:030
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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