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2026-07-23 - 10:38
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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
Characteristics of the 20 highest latencies:
System rackdslot4.osadl.org (updated Thu Jul 23, 2026 00:45:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
51442205171,23sleep10-21swapper/119:07:391
50192202168,22sleep00-21swapper/019:06:030
51452201168,22sleep20-21swapper/219:07:412
50222201166,23sleep30-21swapper/319:06:053
2643621430,4sleep1562599cyclictest19:50:191
1385918464,11phc2sys0-21swapper/319:10:013
1385918464,11phc2sys0-21swapper/319:10:013
89502800,2sleep10-21swapper/122:39:051
5624996813,12cyclictest4778-21cut23:35:160
5624996510,15cyclictest10639-21cpu19:20:120
5624996314,11cyclictest17937-21/usr/sbin/munin19:35:200
5624996311,17cyclictest25408-21/usr/sbin/munin00:20:150
5624996311,17cyclictest25408-21/usr/sbin/munin00:20:150
5624996212,11cyclictest1187-21taskset23:25:490
5624996210,18cyclictest27925-21dpkg21:00:110
5624996114,8cyclictest17403-21/usr/sbin/munin22:55:180
5624996112,11cyclictest13557-21cat21:35:180
5625996021,7cyclictest25-21ksoftirqd/119:45:181
5624996014,11cyclictest20517-21/usr/sbin/munin19:40:130
5624996013,10cyclictest4317-21ps22:20:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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