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2025-12-31 - 10:41
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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 50 highest latencies:
System rack0slot2.osadl.org (updated Wed Dec 31, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
371490627664,8sleep40-21swapper/419:08:224
371469925342,8sleep50-21swapper/519:05:265
371479424636,7sleep60-21swapper/619:06:486
37148712417,30sleep70-21swapper/719:07:537
3715211993732,4cyclictest3951573-21latency_hist21:08:467
3715211993732,4cyclictest3951573-21latency_hist21:08:467
3715211993328,4cyclictest4145638-21latency_hist22:48:457
3715211993328,4cyclictest4145638-21latency_hist22:48:457
3715201993026,3cyclictest3025724-21kworker/u16:0+flush-8:019:44:114
3715201992925,3cyclictest4087059-21kworker/u16:4+flush-8:022:19:034
3715211992520,4cyclictest650-21systemd-journal19:58:417
39804062240,1chrt3980407-21unixbench_singl21:19:167
3715206992421,2cyclictest3696005-21kworker/u16:3+flush-8:019:49:006
3715206992421,2cyclictest3025724-21kworker/u16:0+events_unbound20:33:596
3715201992422,2cyclictest3893567-21kworker/u16:1+flush-8:020:44:224
3715201992321,2cyclictest3025724-21kworker/u16:0+flush-8:020:04:014
3715201992220,2cyclictest48073-21kworker/u16:4+flush-8:023:54:114
3715206992119,2cyclictest3757867-21kworker/u16:1+events_unbound20:14:046
3715211992014,5cyclictest3922452-21latency_hist20:53:467
371520699202,2cyclictest146359-21kworker/u16:3+flush-8:000:38:406
3715206992018,2cyclictest4117012-21kworker/u16:0+flush-8:023:44:166
371520199200,3cyclictest3734866-21grep19:14:054
3715211991913,5cyclictest650-21systemd-journal00:18:457
371521199190,17cyclictest3940147-21tr20:59:087
3715201991917,2cyclictest3985264-21kworker/u16:0+flush-8:021:29:354
3715211991810,7cyclictest3893367-21latency_hist20:38:467
3715206991815,2cyclictest3737627-21kworker/u16:2+events_unbound19:23:596
3715204991815,2cyclictest4117012-21kworker/u16:0+flush-8:023:04:115
371520199180,1cyclictest0-21swapper/423:34:104
371521199173,13cyclictest6045-21gmain23:19:107
3715211991713,3cyclictest3991638-21cat21:29:037
3715211991712,4cyclictest4088661-21cat22:19:017
3715211991710,6cyclictest1267-21snmpd20:47:367
3715206991715,2cyclictest3946392-21kworker/u16:4+flush-8:021:19:086
371520199170,1cyclictest3835222-21kworker/4:120:19:374
371520199170,1cyclictest0-21swapper/423:59:464
371520199170,1cyclictest0-21swapper/423:49:314
371520199170,1cyclictest0-21swapper/423:44:244
371520199170,1cyclictest0-21swapper/423:39:174
371520199170,1cyclictest0-21swapper/423:29:034
371520199170,1cyclictest0-21swapper/423:23:554
371520199170,1cyclictest0-21swapper/423:18:484
371520199170,1cyclictest0-21swapper/423:14:424
371520199170,1cyclictest0-21swapper/423:09:354
371520199170,1cyclictest0-21swapper/423:04:284
371520199170,1cyclictest0-21swapper/422:59:214
371520199170,1cyclictest0-21swapper/422:54:144
371520199170,1cyclictest0-21swapper/422:49:074
371520199170,1cyclictest0-21swapper/422:43:594
371520199170,1cyclictest0-21swapper/422:43:594
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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