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2026-05-28 - 05:18
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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 May 28, 2026 00:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
320600599867,39cyclictest3208902-21systemd-run19:15:023
3206005997878,0cyclictest0-21swapper/322:15:163
3206005997618,39cyclictest3275258-21munin-run21:15:023
3206005997314,40cyclictest3219719-21taskset19:34:053
3206005997314,39cyclictest0-21swapper/320:16:043
3206005997232,39cyclictest0-21swapper/321:38:123
3206005997232,19cyclictest0-21swapper/320:32:113
3206005997112,59cyclictest3278743-21/usr/sbin/munin21:20:143
3206005996727,38cyclictest3338463-21unin-run23:10:013
3206005996627,38cyclictest3216447-21timerandwakeup19:25:223
3206005996526,39cyclictest0-21swapper/322:59:173
3206005996525,39cyclictest52-21ksoftirqd/300:15:153
320600599635,39cyclictest3317291-21kworker/u32:1+events_unbound23:10:093
320600499624,19cyclictest0-21swapper/222:05:162
3206005996021,39cyclictest3324113-21runrttasks22:42:543
320600599590,58cyclictest3241533-21taskset20:13:543
3206005995820,19cyclictest3385793-21df00:35:133
3206005995739,18cyclictest511ktimers/323:48:223
3206005995716,20cyclictest874-21mta-sts-daemon22:28:443
3206005995636,19cyclictest3261684-21df_inode20:50:133
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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