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2026-07-22 - 12:02
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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 Wed Jul 22, 2026 00:45:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
118002205172,22sleep10-21swapper/119:07:271
138591203169,23phc2sys0-21swapper/319:09:043
117072203170,22sleep00-21swapper/019:06:170
118012200168,21sleep20-21swapper/219:07:282
138491670,1ptp4l401ktimersoftd/323:27:123
138491670,1ptp4l401ktimersoftd/323:00:313
138491600,1ptp4l401ktimersoftd/300:10:203
138491600,1ptp4l401ktimersoftd/300:10:203
12288995620,10cyclictest25-21ksoftirqd/121:35:011
163722550,2sleep30-21swapper/322:30:283
12288995424,4cyclictest25-21ksoftirqd/100:05:181
12288995418,8cyclictest25-21ksoftirqd/119:50:001
138491530,1ptp4l391rcuc/321:17:223
138491520,1ptp4l401ktimersoftd/322:41:413
12288995217,7cyclictest25-21ksoftirqd/121:00:001
132042510,3sleep09-21ksoftirqd/000:35:170
1228999511,17cyclictest2315-21gnome-shell19:55:252
12288995023,7cyclictest25-21ksoftirqd/121:55:211
12288995022,7cyclictest25-21ksoftirqd/120:19:591
12288995021,7cyclictest25-21ksoftirqd/123:35:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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