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2026-05-24 - 11:18
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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 rackdslot3.osadl.org (updated Sun May 24, 2026 00:45:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
286232229164,21sleep30-21swapper/319:06:343
286062201168,22sleep10-21swapper/119:06:201
286052201167,22sleep00-21swapper/019:06:180
286372200167,22sleep20-21swapper/219:06:442
2889729071,10sleep00-21swapper/019:10:000
157052670,1sleep115706-21/usr/sbin/munin23:10:141
29188996516,4cyclictest9-21ksoftirqd/022:04:590
14072560,3sleep31406-21tune2fs22:40:153
8892550,4sleep1241ktimersoftd/121:30:211
139391550,1ptp4l401ktimersoftd/322:11:313
29189995417,10cyclictest25-21ksoftirqd/122:40:141
29189995322,3cyclictest121rcu_preempt20:35:131
139391530,1ptp4l401ktimersoftd/323:08:103
29191995247,3cyclictest4326-21idleruntime-cro21:39:593
2919199522,47cyclictest18718-21basename00:25:003
29189995219,7cyclictest25-21ksoftirqd/122:20:261
114342520,2sleep00-21swapper/020:45:190
114342520,2sleep00-21swapper/020:45:180
29189995112,4cyclictest25-21ksoftirqd/100:37:291
29189995016,7cyclictest25-21ksoftirqd/123:50:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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