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2026-05-06 - 09:09
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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 rackfslot7.osadl.org (updated Wed May 06, 2026 00:46:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2691649991170,1cyclictest0-21swapper/700:10:117
2691645999538,38cyclictest2691641-21cyclictest00:01:143
2691645999436,39cyclictest2733060-21base6420:25:013
2691645998810,39cyclictest2816935-21idleruntime22:55:153
269164599791,2cyclictest0-21swapper/300:10:113
2691645997537,19cyclictest2824219-21munin-run23:10:003
2691645997537,19cyclictest2824219-21munin-run23:10:003
2691645997537,19cyclictest2714699-21if_err_eno519:50:173
2691645997516,39cyclictest2805459-21expr22:35:143
2691645997436,19cyclictest2832856-21cpu23:25:123
2691645997314,39cyclictest2703058-21aten2.4_rfpower19:30:143
2691645997031,39cyclictest0-21swapper/322:26:163
2691645996930,39cyclictest27410852sleep320:38:053
2691645996930,39cyclictest0-21swapper/321:19:473
2691645996810,39cyclictest2738559-21latency_hist20:35:023
2691645996629,19cyclictest2840560-21munin-run23:40:003
2691645996527,19cyclictest2871378-21munin-run00:35:003
269164599645,39cyclictest2730509-21kworker/u32:2+events_unbound20:25:033
2691645996425,39cyclictest0-21swapper/321:24:333
269164599602,39cyclictest2741960-21kworker/u32:4+events_unbound20:50:163
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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