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2026-04-25 - 00:38
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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 rack0slot2.osadl.org (updated Fri Apr 24, 2026 12:43:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
398682525141,7sleep40-21swapper/407:06:554
3987301994341,2cyclictest515250-21kworker/u16:1+events_unbound12:28:595
4926342410,0sleep7492635-21sh12:18:387
3987301994139,2cyclictest199343-21kworker/u16:4+events_unbound10:39:525
3987301994037,2cyclictest125090-21kworker/u16:2+events_unbound10:04:245
3987301993937,2cyclictest282465-21kworker/u16:3+events_unbound12:04:555
39867182393,31sleep70-21swapper/707:05:227
3987301993836,2cyclictest396485-21kworker/u16:1+events_unbound11:42:285
3987301993836,2cyclictest368311-21kworker/u16:2+events_unbound12:00:395
3987301993836,2cyclictest368311-21kworker/u16:2+events_unbound11:32:075
3987301993834,3cyclictest4039351-21kworker/u16:2+events_unbound08:04:365
3987301993734,2cyclictest138207-21kworker/u16:1+flush-8:010:19:375
3987301993634,2cyclictest8211-21kworker/u16:2+flush-8:009:19:215
3987301993634,2cyclictest517588-21kworker/u16:4+events_unbound12:35:405
3987301993634,2cyclictest4143793-21kworker/u16:1+events_unbound09:38:485
3987301993634,2cyclictest396485-21kworker/u16:1+events_unbound11:57:125
3987301993634,2cyclictest396485-21kworker/u16:1+events_unbound11:57:125
3987301993634,2cyclictest282465-21kworker/u16:3+events_unbound11:28:075
3987301993634,2cyclictest282465-21kworker/u16:3+events_unbound11:00:595
3987301993634,2cyclictest233584-21kworker/u16:1+events_unbound10:34:455
3987301993634,2cyclictest125090-21kworker/u16:2+events_unbound10:04:165
3987301993533,2cyclictest428846-21kworker/u16:0+events_unbound12:21:085
3987301993533,2cyclictest368311-21kworker/u16:2+events_unbound11:52:075
3987301993533,2cyclictest368311-21kworker/u16:2+events_unbound11:52:075
3987301993533,2cyclictest282465-21kworker/u16:3+events_unbound12:33:485
3987301993533,2cyclictest282465-21kworker/u16:3+events_unbound12:33:485
3987301993533,2cyclictest282465-21kworker/u16:3+events_unbound11:48:285
3987301993533,2cyclictest282465-21kworker/u16:3+events_unbound11:37:165
3987301993533,2cyclictest233584-21kworker/u16:1+events_unbound10:56:565
398442723523,7sleep50-21swapper/507:04:475
3987301993432,2cyclictest342895-21kworker/u16:1+events_unbound11:20:435
3987301993432,2cyclictest295651-21kworker/u16:2+events_unbound11:18:445
3987301993432,2cyclictest282465-21kworker/u16:3+events_unbound12:17:295
3987301993432,2cyclictest17831-21kworker/u16:0+events_unbound09:46:515
3987301993432,2cyclictest17831-21kworker/u16:0+events_unbound09:46:515
3987301993432,2cyclictest171916-21kworker/u16:0+events_unbound10:33:045
3987306993328,4cyclictest150165-21latency_hist09:59:217
3987301993331,2cyclictest368311-21kworker/u16:2+events_unbound12:14:085
3987301993331,2cyclictest282465-21kworker/u16:3+flush-8:011:04:525
3987301993331,2cyclictest27823-21kworker/u16:4+events_unbound09:33:165
3987301993230,2cyclictest27823-21kworker/u16:4+events_unbound09:57:125
3987301993230,2cyclictest233584-21kworker/u16:1+events_unbound10:47:575
3987301993230,2cyclictest138207-21kworker/u16:1+flush-8:010:14:565
3987301993129,2cyclictest4143793-21kworker/u16:1+events_unbound09:28:365
3987301993129,2cyclictest17831-21kworker/u16:0+events_unbound09:50:535
3987301993129,2cyclictest171916-21kworker/u16:0+events_unbound10:51:085
3987301993129,2cyclictest150401-21kworker/u16:3+events_unbound10:12:275
3987299993129,2cyclictest282465-21kworker/u16:3+flush-8:010:58:434
4808302300,1chrt480826-21latency_hist12:14:217
3987301993028,2cyclictest4143793-21kworker/u16:1+events_unbound09:23:375
3987301993028,2cyclictest282465-21kworker/u16:3+flush-8:011:10:275
3987301993028,2cyclictest27823-21kworker/u16:4+events_unbound09:11:365
3987301993028,2cyclictest17831-21kworker/u16:0+events_unbound09:40:285
3987301993028,2cyclictest171916-21kworker/u16:0+events_unbound10:25:365
3987299993028,2cyclictest515250-21kworker/u16:1+flush-8:012:29:214
4306492290,1sleep40-21swapper/411:52:144
4306492290,1sleep40-21swapper/411:52:144
398730699280,26cyclictest52174-21latency_hist09:19:227
3987301992826,2cyclictest4039351-21kworker/u16:2+events_unbound08:04:015
3987301992725,2cyclictest4143793-21kworker/u16:1+events_unbound08:38:015
3987301992624,2cyclictest4039351-21kworker/u16:2+events_unbound08:33:455
3987301992624,2cyclictest3987054-21kworker/u16:4+events_unbound07:40:325
3987301992523,2cyclictest4039351-21kworker/u16:2+events_unbound08:14:015
3987306992418,5cyclictest4058145-21latency_hist07:44:227
3987305992422,2cyclictest4143793-21kworker/u16:1+events_unbound09:24:366
3987306992318,4cyclictest635-21systemd-journal11:49:207
3987305992321,2cyclictest4087296-21kworker/u16:0+flush-8:008:09:366
3987301992321,2cyclictest4000933-21kworker/u16:1+events_unbound07:28:005
3987299992320,2cyclictest4077327-21kworker/u16:3+events_unbound08:14:364
398671722313,7sleep60-21swapper/607:05:216
3987306992217,4cyclictest297230-21latency_hist10:59:227
3987299992218,3cyclictest4039351-21kworker/u16:2+flush-8:007:39:404
3987301992119,2cyclictest4077327-21kworker/u16:3+events_unbound08:25:315
3987301992119,2cyclictest4039351-21kworker/u16:2+events_unbound07:49:005
3987301992119,2cyclictest3968334-21kworker/u16:0+flush-8:007:19:325
3987299992119,2cyclictest4029557-21kworker/u16:0+events_unbound07:34:214
3987306992014,5cyclictest4077321-21latency_hist07:54:227
3987301992016,3cyclictest4001453-21diskstats07:14:355
3987301991917,2cyclictest4077327-21kworker/u16:3+events_unbound08:19:395
3987301991917,2cyclictest4077327-21kworker/u16:3+events_unbound08:19:395
3987301991917,2cyclictest4039351-21kworker/u16:2+events_unbound08:15:315
3987301991916,2cyclictest4077327-21kworker/u16:3+events_unbound07:54:325
3987299991916,2cyclictest4143793-21kworker/u16:1+events_unbound09:09:294
3987299991916,2cyclictest4143793-21kworker/u16:1+events_unbound08:54:364
3987305991815,3cyclictest17831-21kworker/u16:0+flush-8:009:40:256
3987301991816,2cyclictest4039351-21kworker/u16:2+events_unbound07:49:475
3987301991816,2cyclictest17831-21kworker/u16:0+events_unbound09:06:315
3987299991816,2cyclictest4039351-21kworker/u16:2+flush-8:008:29:374
3987299991816,2cyclictest282465-21kworker/u16:3+events_unbound12:14:164
3987299991815,2cyclictest4077327-21kworker/u16:3+events_unbound08:24:364
398730699170,15cyclictest1234-21snmpd08:36:527
3987301991714,2cyclictest3987054-21kworker/u16:4+events_unbound07:34:235
3987301991714,2cyclictest3987054-21kworker/u16:4+events_unbound07:34:235
3987299991715,2cyclictest4039351-21kworker/u16:2+events_unbound07:54:364
3987299991715,2cyclictest233584-21kworker/u16:1+flush-8:010:29:594
398730699160,14cyclictest0-21swapper/708:39:457
3987301991614,2cyclictest8211-21kworker/u16:2+flush-8:008:59:425
3987299991614,2cyclictest199343-21kworker/u16:4+flush-8:010:34:394
3987299991613,2cyclictest282465-21kworker/u16:3+flush-8:011:09:274
3987306991510,4cyclictest407387-21basename11:44:207
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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