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2026-09-14 - 22:08
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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 Mon Sep 14, 2026 12:45:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
152859911912,96cyclictest0-21swapper/011:25:110
152859911273,29cyclictest14-21ksoftirqd/008:15:130
152859911210,89cyclictest0-21swapper/009:05:120
152859911013,86cyclictest0-21swapper/010:20:220
152859910871,26cyclictest0-21swapper/009:15:140
15289991068,28cyclictest2335-21kworker/1:110:00:121
3171921010,6chrt31720-21grep12:25:010
152859910112,24cyclictest0-21swapper/011:05:140
152859910112,24cyclictest0-21swapper/011:05:140
152899910063,24cyclictest26-21ksoftirqd/110:10:111
152859910052,36cyclictest14-21ksoftirqd/012:15:140
152859910050,36cyclictest14-21ksoftirqd/011:50:110
15289999966,21cyclictest26-21ksoftirqd/111:35:141
1479229916,38sleep00-21swapper/007:06:410
15289999838,48cyclictest26-21ksoftirqd/109:30:141
15285999842,42cyclictest14-21ksoftirqd/012:30:250
56172970,6chrt5616-21/usr/sbin/munin11:10:171
15289999662,23cyclictest26-21ksoftirqd/107:30:121
15285999645,32cyclictest14-21ksoftirqd/012:10:230
15289999558,25cyclictest0-21swapper/111:40:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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