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2026-05-28 - 13:15
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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 10 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
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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