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2026-03-11 - 22:25
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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 Wed Mar 11, 2026 12:45:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139491231163,23phc2sys0-21swapper/307:06:303
287462203169,23sleep00-21swapper/007:08:560
287792201168,22sleep10-21swapper/107:09:221
287482201168,22sleep20-21swapper/207:08:582
2912399689,12cyclictest10857-21cut07:40:002
29123996610,11cyclictest17716-21fschecks_count11:15:172
2912399657,16cyclictest28257-21/usr/sbin/munin09:20:222
279772650,2sleep20-21swapper/208:15:012
2912399607,11cyclictest25633-21date08:10:012
2912399598,11cyclictest22195-21wc11:25:132
2912399595,12cyclictest18274-21irqrtprio09:00:192
2912399588,17cyclictest5373-21systemctl11:55:222
2912399586,17cyclictest0-21swapper/211:53:452
2912399586,17cyclictest0-21swapper/211:53:452
2912399586,12cyclictest14852-21mailstats12:15:232
2912399578,10cyclictest25889-21systemctl09:15:242
2912399577,11cyclictest1744-21cpuspeed_turbos09:35:112
2912399566,11cyclictest30448-21ptp4l07:10:242
2912399558,10cyclictest9247-21which12:05:152
2912399557,9cyclictest30725-21grep11:40:262
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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