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2025-09-18 - 16:03
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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 10 highest latencies:
System rackeslot6.osadl.org (updated Thu Sep 18, 2025 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
357670899143126,12cyclictest3631584-21latency_hist10:00:011
35767089911094,12cyclictest601706-21systemd-journal09:05:011
35767089910795,9cyclictest3655740-21latency_hist11:15:001
35767059910577,25cyclictest3662116-21latency_hist11:35:000
35767089910494,8cyclictest3595993-21/usr/sbin/munin08:10:241
3576708999973,15cyclictest3633699-21apt-get10:05:151
3576705999888,7cyclictest3679939-21kworker/u8:0+flush-179:012:35:260
3576708999784,11cyclictest3655995-21apt-get11:15:131
3576708999684,9cyclictest3647823-21kworker/u8:3+flush-179:011:05:161
3576708999078,10cyclictest3620691-21apt-get09:25:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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