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2026-03-28 - 04:36
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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 rackdslot2.osadl.org (updated Sat Mar 28, 2026 00:45:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139591225158,22phc2sys0-21swapper/319:05:513
238442207175,21sleep10-21swapper/119:09:221
236282206173,22sleep20-21swapper/219:06:342
238232205172,22sleep00-21swapper/019:09:040
305662770,3sleep00-21swapper/020:30:150
2418899685,60cyclictest32307-21kworker/2:119:40:262
139291650,1ptp4l401ktimersoftd/319:44:443
24188996229,10cyclictest33-21ksoftirqd/223:50:172
139291590,8ptp4l401ktimersoftd/300:04:243
301992580,6sleep12418799cyclictest21:35:231
24188995823,9cyclictest33-21ksoftirqd/219:15:282
229182580,1sleep222922-21irqrtprio23:35:192
325852570,4sleep032590-21missed_timers19:25:200
139291550,0ptp4l401ktimersoftd/322:12:493
84422540,2sleep00-21swapper/020:50:220
2418899541,51cyclictest20130-21kworker/2:020:10:262
172672540,3sleep117269-21needreboot00:30:231
2418899534,45cyclictest217-21systemd-journal22:40:012
2418899515,5cyclictest33-21ksoftirqd/220:35:222
139291500,1ptp4l401ktimersoftd/322:21:043
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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