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2025-07-15 - 22:35
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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 Tue Jul 15, 2025 12:45:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
235912990,5chrt23590-21/usr/sbin/munin11:50:220
2009128726,48sleep10-21swapper/107:05:321
1903528338,28sleep00-21swapper/007:05:170
20713998144,24cyclictest26-21ksoftirqd/112:15:141
20713997842,24cyclictest26-21ksoftirqd/110:20:141
20713997740,24cyclictest26-21ksoftirqd/112:35:131
20713997740,24cyclictest26-21ksoftirqd/112:35:131
20713997641,23cyclictest26-21ksoftirqd/110:10:141
20713997540,23cyclictest26-21ksoftirqd/108:10:131
20713997441,10cyclictest26-21ksoftirqd/107:20:151
20708997314,52cyclictest0-21swapper/008:15:120
20708997314,52cyclictest0-21swapper/008:15:120
20713997141,11cyclictest26-21ksoftirqd/107:15:181
20713997141,10cyclictest26-21ksoftirqd/109:45:141
20713996830,15cyclictest26-21ksoftirqd/110:45:331
20713996829,15cyclictest26-21ksoftirqd/111:20:001
20713996738,11cyclictest26-21ksoftirqd/109:05:141
20713996738,11cyclictest26-21ksoftirqd/109:05:141
20713996737,10cyclictest26-21ksoftirqd/110:40:161
20708996631,24cyclictest4529-21apt-get09:25:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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