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2026-05-28 - 16:17
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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 rackbslot7.osadl.org (updated Thu May 28, 2026 12:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7643991153,72cyclictest18290-21taskset10:50:343
7637991153,90cyclictest18226-21apt-get10:50:342
7643991103,94cyclictest3957-21chrt11:20:293
7637991103,81cyclictest16792-21apt-get09:55:322
76379910811,51cyclictest3926-21apt-get11:20:342
7637991078,46cyclictest12523-21/usr/sbin/munin08:51:422
7637991074,52cyclictest27045-21tail10:10:512
738021076,16sleep00-21swapper/006:58:590
76379910649,16cyclictest14646-21switchtime09:51:292
7637991042,78cyclictest10664-21apt-get08:45:382
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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