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2026-04-21 - 08:12
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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 100 highest latencies:
System rackdslot1.osadl.org (updated Tue Apr 21, 2026 00:45:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491730,6ptp4l6544-21/usr/sbin/munin19:05:141
8893996534,3cyclictest25-21ksoftirqd/120:25:181
8893996232,7cyclictest25-21ksoftirqd/123:50:001
8452610,4sleep30-21swapper/321:10:163
8893996029,3cyclictest25-21ksoftirqd/121:40:001
8895995926,3cyclictest41-21ksoftirqd/321:20:013
8893995929,8cyclictest25-21ksoftirqd/123:25:271
8893995926,3cyclictest25-21ksoftirqd/119:50:061
8893995926,3cyclictest25-21ksoftirqd/119:50:061
134491590,4ptp4l0-21swapper/222:44:252
8895995825,3cyclictest41-21ksoftirqd/319:55:003
8895995825,3cyclictest41-21ksoftirqd/319:55:003
8893995830,8cyclictest25-21ksoftirqd/121:10:181
8893995826,4cyclictest25-21ksoftirqd/123:13:051
8893995824,6cyclictest25-21ksoftirqd/100:11:101
8893995824,3cyclictest25-21ksoftirqd/122:08:141
8893995729,7cyclictest25-21ksoftirqd/122:31:011
8893995727,4cyclictest25-21ksoftirqd/122:50:011
8893995727,3cyclictest25-21ksoftirqd/123:00:201
8893995726,4cyclictest25-21ksoftirqd/122:25:301
8893995723,8cyclictest25-21ksoftirqd/121:55:131
8893995723,3cyclictest25-21ksoftirqd/100:33:371
134491570,4ptp4l0-21swapper/120:10:221
8893995628,10cyclictest25-21ksoftirqd/100:35:171
8893995623,4cyclictest25-21ksoftirqd/120:57:051
134491560,4ptp4l30853-1kworker/2:2H00:20:222
134491560,4ptp4l0-21swapper/319:59:333
134491560,4ptp4l0-21swapper/122:21:001
134491560,4ptp4l0-21swapper/121:50:131
134491560,3ptp4l0-21swapper/200:15:212
8893995528,6cyclictest25-21ksoftirqd/119:11:271
8893995525,3cyclictest25-21ksoftirqd/120:17:421
8893995522,3cyclictest25-21ksoftirqd/120:36:551
8895995424,3cyclictest41-21ksoftirqd/320:05:013
8895995422,4cyclictest41-21ksoftirqd/300:21:353
8893995426,6cyclictest25-21ksoftirqd/119:28:031
8893995425,6cyclictest25-21ksoftirqd/123:30:281
8893995419,7cyclictest25-21ksoftirqd/120:45:191
134491540,4ptp4l0-21swapper/223:21:542
134491540,4ptp4l0-21swapper/219:29:412
134491540,3ptp4l889299cyclictest21:00:150
8895995323,4cyclictest41-21ksoftirqd/323:23:063
8895995321,4cyclictest41-21ksoftirqd/300:11:323
8895995320,4cyclictest41-21ksoftirqd/322:24:493
8895995320,10cyclictest41-21ksoftirqd/320:25:423
8895995319,4cyclictest41-21ksoftirqd/322:38:373
8895995319,10cyclictest41-21ksoftirqd/319:25:013
8895995319,10cyclictest41-21ksoftirqd/319:25:013
8893995328,7cyclictest25-21ksoftirqd/123:06:511
8893995327,6cyclictest25-21ksoftirqd/121:20:271
134491530,4ptp4l0-21swapper/223:33:062
134491530,4ptp4l0-21swapper/222:08:002
134491530,4ptp4l0-21swapper/200:31:302
8895995224,7cyclictest41-21ksoftirqd/319:15:153
8895995221,4cyclictest41-21ksoftirqd/320:47:333
889399524,6cyclictest25-21ksoftirqd/121:15:201
8893995225,6cyclictest25-21ksoftirqd/119:58:201
8893995222,3cyclictest25-21ksoftirqd/119:30:211
134491520,4ptp4l0-21swapper/223:38:382
8895995124,4cyclictest41-21ksoftirqd/319:36:513
8895995122,3cyclictest41-21ksoftirqd/323:25:233
8895995120,4cyclictest41-21ksoftirqd/320:52:303
8895995117,7cyclictest41-21ksoftirqd/322:35:003
8893995126,7cyclictest25-21ksoftirqd/119:45:111
8893995126,6cyclictest25-21ksoftirqd/122:38:381
8893995125,6cyclictest25-21ksoftirqd/122:55:121
8893995124,3cyclictest25-21ksoftirqd/121:25:281
8893995118,7cyclictest25-21ksoftirqd/121:05:201
8893995117,8cyclictest25-21ksoftirqd/100:05:221
134491510,4ptp4l0-21swapper/219:37:562
134491510,4ptp4l0-21swapper/120:54:161
134491510,4ptp4l0-21swapper/120:33:431
889599508,7cyclictest41-21ksoftirqd/320:35:253
8895995021,9cyclictest41-21ksoftirqd/323:50:223
8895995019,7cyclictest41-21ksoftirqd/323:00:013
8895995019,4cyclictest41-21ksoftirqd/323:40:023
8895995018,8cyclictest41-21ksoftirqd/322:52:193
889399505,2cyclictest25-21ksoftirqd/122:15:221
889399503,3cyclictest25-21ksoftirqd/119:35:161
8893995023,6cyclictest25-21ksoftirqd/123:20:431
8893995022,4cyclictest25-21ksoftirqd/123:40:001
8893995017,8cyclictest25-21ksoftirqd/123:50:281
8893995015,7cyclictest25-21ksoftirqd/122:10:251
8893995012,8cyclictest25-21ksoftirqd/122:40:281
134491500,4ptp4l0-21swapper/220:00:492
134491500,3ptp4l10827-21latency21:30:211
134491500,10ptp4l6559-21dpkg19:05:120
889599492,2cyclictest121rcu_preempt22:48:593
8895994922,6cyclictest41-21ksoftirqd/320:10:253
8895994920,4cyclictest41-21ksoftirqd/321:26:443
8895994917,8cyclictest41-21ksoftirqd/323:45:123
8895994916,8cyclictest41-21ksoftirqd/300:00:303
889599491,3cyclictest121rcu_preempt22:18:593
889599491,3cyclictest121rcu_preempt21:21:593
8895994912,7cyclictest41-21ksoftirqd/319:15:003
889399494,3cyclictest25-21ksoftirqd/119:40:251
8893994923,3cyclictest25-21ksoftirqd/121:40:231
8893994918,7cyclictest25-21ksoftirqd/123:55:171
8893994918,7cyclictest25-21ksoftirqd/122:00:221
134491490,4ptp4l0-21swapper/321:52:233
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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