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2025-12-11 - 19:59
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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 Thu Dec 11, 2025 12:46:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4163432997315,39cyclictest788-21systemd-logind11:00:014
4163432997011,39cyclictest0-21swapper/411:40:214
4163431997011,59cyclictest0-21swapper/310:55:163
4163432996929,39cyclictest0-21swapper/411:18:234
4163432996828,39cyclictest56512-21/usr/sbin/munin09:40:254
416343299678,40cyclictest127863-21/usr/sbin/munin11:50:014
4163432996727,39cyclictest0-21swapper/407:30:274
4163432996626,39cyclictest0-21swapper/407:47:274
416343299658,38cyclictest362-21jbd2/sda2-811:00:394
416343299657,38cyclictest4193013-21kworker/u32:6+events_unbound08:20:114
4163432996525,39cyclictest0-21swapper/408:07:474
4163432996426,19cyclictest90295-21mailstats10:40:234
416343299634,39cyclictest4183705-21kworker/u32:5+flush-8:008:13:434
4163432996324,19cyclictest6050ktimers/407:39:254
4163432996323,39cyclictest3389514-21systemd-journal08:27:234
4163432996123,19cyclictest120987-21ntpq11:35:254
4163432996021,38cyclictest0-21swapper/408:17:174
4163432996021,19cyclictest0-21swapper/412:30:414
4163432995938,20cyclictest137157-21cstates12:05:174
4163432995920,19cyclictest0-21swapper/409:00:094
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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