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2026-05-24 - 01:08
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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 Sat May 23, 2026 12:45:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2849722600,9sleep10-21swapper/107:08:221
1454422290,4sleep00-21swapper/007:09:550
2869922230,9sleep20-21swapper/207:05:292
895822070,6sleep38978-21sh07:09:443
1385918262,11phc2sys0-21swapper/307:10:003
186542760,2sleep10-21swapper/107:10:031
226722670,3sleep022675-21sort07:10:530
138491640,1ptp4l401ktimersoftd/310:15:483
244452580,5sleep124447-21unixbench_multi12:25:261
17588995623,11cyclictest33-21ksoftirqd/208:40:132
17588995226,9cyclictest33-21ksoftirqd/209:50:272
138491520,1ptp4l401ktimersoftd/310:27:343
53912510,6sleep11758799cyclictest07:30:001
17588995126,9cyclictest33-21ksoftirqd/210:45:252
114402510,3sleep211442-21proc_pri08:45:222
316302500,4sleep331632-21unixbench_multi09:25:273
1758899502,4cyclictest24111-21apt-get07:10:132
17588995014,7cyclictest33-21ksoftirqd/207:50:292
1758899496,6cyclictest33-21ksoftirqd/210:05:132
1758899495,8cyclictest33-21ksoftirqd/207:30:132
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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