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2026-04-10 - 23:09
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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 20 highest latencies:
System rack3slot6.osadl.org (updated Fri Apr 10, 2026 12:44:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
941322110,9sleep09412-21aten2.4-expect07:05:130
1078528730,45sleep10-21swapper/107:08:201
11127997323,45cyclictest26-21ksoftirqd/110:05:271
177782720,6sleep017781-21grep08:55:260
11127996925,9cyclictest26-21ksoftirqd/109:12:441
11122996835,17cyclictest14-21ksoftirqd/007:40:380
11127996747,13cyclictest26-21ksoftirqd/112:10:111
11127996624,8cyclictest26-21ksoftirqd/109:55:381
11127996534,18cyclictest26-21ksoftirqd/112:00:261
1112299657,18cyclictest1377-21apt-get08:10:130
11122996539,21cyclictest243-21systemd-journal11:40:130
11122996534,25cyclictest14-21ksoftirqd/008:40:150
11122996532,27cyclictest14-21ksoftirqd/009:55:260
11122996434,15cyclictest14-21ksoftirqd/007:38:190
11122996434,15cyclictest14-21ksoftirqd/007:38:190
11127996320,38cyclictest0-21swapper/112:25:141
11127996317,41cyclictest0-21swapper/108:35:361
11122996318,38cyclictest32765-21cron09:40:000
11127996234,13cyclictest26-21ksoftirqd/107:39:001
11127996234,13cyclictest26-21ksoftirqd/107:39:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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