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2026-05-24 - 08:11
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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 Sun May 24, 2026 00:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2987321998930,58cyclictest3111318-21cut22:50:174
2987321998830,39cyclictest3054049-21cut21:10:014
2987321997233,39cyclictest0-21swapper/419:15:054
2987321997214,39cyclictest3090317-21munin-run22:15:014
2987321997133,38cyclictest0-21swapper/423:33:294
2987321997133,38cyclictest0-21swapper/422:16:414
2987321997111,59cyclictest0-21swapper/422:38:334
2987321997012,39cyclictest3148873-21taskset23:55:374
2987321996911,19cyclictest3122156-21cpuspeed_turbos23:10:134
298732199667,40cyclictest3030886-21ld20:25:194
2987321996628,19cyclictest3108182-21diskstats22:45:174
298732199633,60cyclictest3026933-21/usr/sbin/munin20:20:224
298732199624,39cyclictest3055674-21grep21:10:184
298732199621,4cyclictest0-21swapper/422:20:174
298732199613,39cyclictest3062398-21apt-key21:25:014
298732199612,20cyclictest2987150-21kworker/u32:0+flush-8:020:13:364
2987321996041,19cyclictest1-21systemd22:10:004
298732199602,39cyclictest3099117-21cut22:30:124
2987321996022,38cyclictest781-21mta-sts-daemon00:01:144
2987321995739,0cyclictest0-21swapper/420:42:334
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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