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2025-12-03 - 20:54
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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 Wed Dec 03, 2025 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
322714199118105,11cyclictest3301292-21latency_hist11:00:011
32271419910095,4cyclictest3306351-21kworker/u8:3+events_unbound11:30:251
32271419910088,4cyclictest3254660-21kworker/u8:3+events_unbound09:15:241
3227141999891,5cyclictest3306351-21kworker/u8:3+events_unbound11:25:231
3227140999786,8cyclictest3240047-21latency_hist07:50:000
3227140999786,8cyclictest3240047-21latency_hist07:50:000
3227141999388,3cyclictest3254660-21kworker/u8:3+events_unbound09:05:231
3227141999287,4cyclictest3287200-21kworker/u8:1+events_unbound10:15:251
3227141999085,4cyclictest3251435-21kworker/u8:1+events_unbound08:30:241
3227140998978,8cyclictest3242129-21/usr/sbin/munin07:55:230
3227140998878,8cyclictest3296762-21/usr/sbin/munin10:45:240
3227141998581,3cyclictest3306351-21kworker/u8:3+events_unbound11:45:231
3227141998480,3cyclictest3254660-21kworker/u8:3+events_unbound08:35:251
3227141998375,3cyclictest3306351-21kworker/u8:3+events_unbound11:40:241
3227141998273,3cyclictest3269530-21kworker/u8:1+events_unbound10:05:261
3227140998275,5cyclictest1-21systemd10:19:590
3227141998171,7cyclictest3330446-21latency_hist12:30:021
3227140998073,5cyclictest3298346-21/usr/sbin/munin10:50:220
3227140997767,7cyclictest3262588-21latency_hist09:00:010
3227141997672,3cyclictest3269530-21kworker/u8:1+events_unbound10:00:251
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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