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2026-09-12 - 00:14
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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 Fri Sep 11, 2026 12:45:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
67222680,7sleep11694999cyclictest09:05:211
34732680,7sleep21695099cyclictest09:00:122
134691660,36getstats41-21ksoftirqd/311:10:323
134491660,4ptp4l3846-21hddtemp_smartct10:10:201
11902640,1sleep01193-21grep10:05:140
16951996328,6cyclictest41-21ksoftirqd/312:10:213
1695199632,24cyclictest0-21swapper/310:27:583
16951996227,7cyclictest41-21ksoftirqd/307:30:263
1695199622,22cyclictest0-21swapper/308:44:593
16951996133,9cyclictest41-21ksoftirqd/308:25:143
16951996127,3cyclictest41-21ksoftirqd/310:55:013
16951996125,10cyclictest41-21ksoftirqd/311:50:583
110822610,7sleep01694899cyclictest08:05:220
16951996030,6cyclictest41-21ksoftirqd/312:30:003
16951996027,7cyclictest41-21ksoftirqd/308:15:133
16951996026,8cyclictest41-21ksoftirqd/311:45:133
134491600,4ptp4l16715-21apt-get08:20:051
16951995921,7cyclictest41-21ksoftirqd/312:00:243
16951995921,7cyclictest41-21ksoftirqd/312:00:233
16951995918,4cyclictest41-21ksoftirqd/308:00:123
1694899595,7cyclictest134491ptp4l09:15:260
134491590,9ptp4l15702-21/usr/sbin/munin07:05:211
16951995829,8cyclictest41-21ksoftirqd/308:55:173
16951995829,7cyclictest41-21ksoftirqd/309:30:233
16951995829,6cyclictest41-21ksoftirqd/311:00:283
16951995822,4cyclictest41-21ksoftirqd/312:05:253
16950995826,30cyclictest33-21ksoftirqd/210:25:172
16951995729,7cyclictest41-21ksoftirqd/311:55:133
16951995728,7cyclictest41-21ksoftirqd/307:50:253
16951995727,3cyclictest41-21ksoftirqd/310:35:203
16951995726,8cyclictest41-21ksoftirqd/311:30:273
16951995726,7cyclictest41-21ksoftirqd/308:08:233
16951995726,4cyclictest41-21ksoftirqd/312:20:043
16951995725,10cyclictest41-21ksoftirqd/310:30:143
16951995720,9cyclictest41-21ksoftirqd/312:30:203
134491570,4ptp4l0-21swapper/311:20:293
134491570,4ptp4l0-21swapper/108:40:231
134491570,3ptp4l1777-21grep07:45:201
134491570,3ptp4l0-21swapper/108:45:131
134491570,3ptp4l0-21swapper/011:55:250
16951995639,3cyclictest41-21ksoftirqd/307:48:223
16951995631,6cyclictest41-21ksoftirqd/309:44:083
16951995630,7cyclictest41-21ksoftirqd/309:23:393
16951995626,3cyclictest41-21ksoftirqd/308:20:203
16951995623,9cyclictest41-21ksoftirqd/310:15:143
16951995622,8cyclictest41-21ksoftirqd/309:50:303
16951995614,6cyclictest41-21ksoftirqd/310:22:283
16951995528,6cyclictest41-21ksoftirqd/312:38:483
16951995528,6cyclictest41-21ksoftirqd/309:55:133
16951995527,6cyclictest41-21ksoftirqd/308:10:183
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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