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2026-05-11 - 19:27
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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 rackeslot6.osadl.org (updated Mon May 11, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
320781899111101,7cyclictest3227168-21latency_hist08:10:020
3207818999484,7cyclictest1213033-21systemd-journal09:55:000
3207818999182,6cyclictest3230357-21latency_hist08:20:000
3207823999081,7cyclictest3285266-21latency_hist11:10:011
3207823998578,5cyclictest3252940-21kworker/u8:3+flush-179:009:45:131
3207823998573,9cyclictest1213033-21systemd-journal08:20:001
3207823998475,7cyclictest3301190-21apt-get11:58:361
3207823998374,7cyclictest3215995-21latency_hist07:35:011
3207823998074,5cyclictest3227406-21kworker/u8:1+flush-179:008:45:001
3207823997969,8cyclictest3272507-21/usr/sbin/munin10:30:251
3207823997872,5cyclictest3302817-21kworker/u8:1+flush-179:012:19:551
3207818997869,7cyclictest3219472-21apt-get07:45:120
3207818997869,6cyclictest3240147-21kworker/u8:0+flush-179:009:00:160
3207823997569,4cyclictest3242295-21kworker/u8:1+flush-179:009:05:161
3207823997564,9cyclictest3283421-21latency_hist11:05:011
3207823997466,6cyclictest3212569-21apt-get07:25:001
3207823997464,8cyclictest1213033-21systemd-journal07:40:011
3207823997360,11cyclictest3240147-21kworker/u8:0+flush-179:008:55:171
3207823997265,4cyclictest3294800-21kworker/u8:2+flush-179:011:45:161
3207818997264,6cyclictest3278620-21kworker/u8:1+flush-179:010:55:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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