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2026-04-06 - 19:57
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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 50 highest latencies:
System rackdslot1.osadl.org (updated Mon Apr 06, 2026 12:45:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
728721430,7sleep32110399cyclictest11:15:203
134491750,28ptp4l19716-21meminfo07:05:210
134491640,26ptp4l31837-21if_enp1s009:50:160
134491630,4ptp4l1886-21df11:05:130
134491630,4ptp4l1886-21df11:05:130
134491610,4ptp4l0-21swapper/209:40:242
21101996032,6cyclictest25-21ksoftirqd/110:20:001
134491600,18ptp4l30907-21iostat07:30:170
21101995929,3cyclictest25-21ksoftirqd/112:29:111
134491590,4ptp4l0-21swapper/308:15:183
74812580,4sleep00-21swapper/012:25:220
21101995829,4cyclictest25-21ksoftirqd/112:20:141
21101995827,4cyclictest25-21ksoftirqd/107:12:511
21101995825,5cyclictest25-21ksoftirqd/107:20:211
21101995824,8cyclictest25-21ksoftirqd/110:25:001
134491580,4ptp4l0-21swapper/208:13:412
134491580,3ptp4l22130-21apt-get09:30:113
134491580,3ptp4l22130-21apt-get09:30:113
21101995728,4cyclictest25-21ksoftirqd/111:22:321
134491570,5ptp4l0-21swapper/007:10:180
134491570,3ptp4l0-21swapper/310:15:563
292182560,3sleep20-21swapper/209:45:132
21101995625,4cyclictest25-21ksoftirqd/108:28:211
21101995623,7cyclictest25-21ksoftirqd/112:05:141
21101995623,7cyclictest25-21ksoftirqd/112:05:131
21101995623,3cyclictest25-21ksoftirqd/109:26:381
21101995622,4cyclictest25-21ksoftirqd/108:13:081
21101995616,7cyclictest25-21ksoftirqd/111:05:241
21101995616,7cyclictest25-21ksoftirqd/111:05:241
134491560,17ptp4l17061-21apt-get09:20:040
21101995526,4cyclictest25-21ksoftirqd/109:34:201
21101995526,4cyclictest25-21ksoftirqd/109:34:201
21101995525,9cyclictest25-21ksoftirqd/110:00:191
21101995523,5cyclictest25-21ksoftirqd/110:00:001
21101995522,6cyclictest25-21ksoftirqd/108:05:141
21101995521,4cyclictest25-21ksoftirqd/108:40:001
21101995521,4cyclictest25-21ksoftirqd/107:30:001
134491550,4ptp4l0-21swapper/207:26:312
134491550,3ptp4l0-21swapper/008:15:160
21101995429,7cyclictest25-21ksoftirqd/110:59:501
21101995427,6cyclictest25-21ksoftirqd/111:55:451
21101995427,6cyclictest25-21ksoftirqd/109:09:411
21101995426,7cyclictest25-21ksoftirqd/110:06:451
21101995425,8cyclictest25-21ksoftirqd/108:15:131
21101995422,4cyclictest25-21ksoftirqd/110:40:001
21101995421,10cyclictest25-21ksoftirqd/109:40:241
134491540,4ptp4l0-21swapper/309:35:163
134491540,4ptp4l0-21swapper/210:55:242
134491540,4ptp4l0-21swapper/110:50:071
134491540,4ptp4l0-21swapper/009:00:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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