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2026-05-04 - 01:26
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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 rack3slot6.osadl.org (updated Sun May 03, 2026 12:45:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
332122750,14sleep13315-21cyclictest07:10:011
1383621000,7chrt13837-21aten2.4_r3power10:40:171
3324999341,32cyclictest8212-21/usr/sbin/munin11:55:360
3324998349,15cyclictest14-21ksoftirqd/008:29:200
3324998252,16cyclictest503-21snmpd12:39:410
3324997733,39cyclictest14-21ksoftirqd/011:47:350
3324997634,15cyclictest14-21ksoftirqd/007:20:010
294427616,51sleep00-21swapper/007:07:570
3324997442,27cyclictest21939-21telnet08:00:150
3324997442,27cyclictest21939-21telnet08:00:150
3324997134,31cyclictest14-21ksoftirqd/010:30:100
3324997029,16cyclictest14-21ksoftirqd/010:00:010
3328996930,15cyclictest26-21ksoftirqd/111:15:011
332499687,21cyclictest16638-21apt-get07:45:140
3324996836,26cyclictest14-21ksoftirqd/007:20:420
3324996830,15cyclictest14-21ksoftirqd/011:20:000
3324996828,36cyclictest14-21ksoftirqd/012:04:400
3324996828,36cyclictest14-21ksoftirqd/012:04:400
3328996646,16cyclictest26-21ksoftirqd/109:14:291
3328996641,9cyclictest26-21ksoftirqd/111:15:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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