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2026-03-30 - 19:06
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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 Mon Mar 30, 2026 12:45:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
138591201168,22phc2sys0-21swapper/307:09:553
113372200166,22sleep20-21swapper/207:09:092
113402199165,22sleep00-21swapper/007:09:110
111612197161,24sleep10-21swapper/107:06:501
1384911020,1ptp4l2433-21irqstats10:05:193
56092710,1sleep10-21swapper/111:15:261
237552620,4sleep125-21ksoftirqd/109:45:001
237552620,4sleep125-21ksoftirqd/109:45:001
138491580,1ptp4l401ktimersoftd/307:10:213
138491570,1ptp4l401ktimersoftd/311:01:203
138491520,1ptp4l401ktimersoftd/311:46:083
138491480,1ptp4l401ktimersoftd/307:16:183
138491430,0ptp4l401ktimersoftd/309:00:293
11702994338,3cyclictest31798-21fschecks_count10:00:143
50798410,4rtkit-daemon6689-21apt-get12:25:133
11699994136,2cyclictest9-21ksoftirqd/010:20:000
138491400,0ptp4l401ktimersoftd/308:40:153
11702994034,4cyclictest41-21ksoftirqd/312:00:003
11701994033,4cyclictest11301-21cron10:25:002
11699994035,3cyclictest9-21ksoftirqd/012:30:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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