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2026-03-30 - 21:29
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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 Mon Mar 30, 2026 12:46:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2386309999638,39cyclictest790-21in:imuxsock10:10:013
2386309999636,39cyclictest2430321-21chrt08:29:223
2386309999618,59cyclictest2510319-21aten2.4-expect10:55:133
2386309999214,59cyclictest2560328-21df_inode12:25:153
238630999868,59cyclictest1-21systemd08:35:013
238630999835,59cyclictest2469027-21kworker/u32:4+events_unbound09:45:213
2386309997979,0cyclictest319-21ice-ptp-0000:f4:00.009:38:363
2386309997878,0cyclictest319-21ice-ptp-0000:f4:00.008:43:093
2386309997738,20cyclictest2531462-21sed11:30:203
2386309997676,0cyclictest319-21ice-ptp-0000:f4:00.008:20:453
238630999760,57cyclictest2506700-21grep10:45:233
2386309996969,0cyclictest2425059-21systemctl08:20:013
2386309996830,19cyclictest511ktimers/310:16:093
2386309996627,39cyclictest0-21swapper/307:53:483
2386309996324,39cyclictest0-21swapper/311:27:453
238630999624,39cyclictest2535036-21munin-run11:40:013
238630999624,39cyclictest2535036-21munin-run11:40:003
2386309996223,39cyclictest0-21swapper/311:12:573
238630999613,39cyclictest2420695-21meminfo08:10:183
2386309995618,19cyclictest2500596-21ntpq10:35:213
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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