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2025-09-16 - 07:01
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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 Tue Sep 16, 2025 00:45:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
445621710,5sleep01655799cyclictest22:10:220
3005421280,3sleep01655799cyclictest20:45:290
2847191630,19ptp4l23605-21latency_hist20:35:002
194412620,4sleep10-21swapper/121:35:011
16562996230,8cyclictest41-21ksoftirqd/300:35:003
2847191610,4ptp4l0-21swapper/300:05:003
2847191610,4ptp4l0-21swapper/222:00:252
2847191600,4ptp4l0-21swapper/322:39:303
2847191600,4ptp4l0-21swapper/121:15:021
16562996026,10cyclictest41-21ksoftirqd/323:41:353
2847191590,4ptp4l0-21swapper/322:50:033
2847191590,4ptp4l0-21swapper/223:20:142
2847191590,4ptp4l0-21swapper/219:20:212
16562995929,8cyclictest41-21ksoftirqd/319:15:283
16559995917,6cyclictest25-21ksoftirqd/122:07:131
2847191580,4ptp4l0-21swapper/219:46:392
16562995823,7cyclictest41-21ksoftirqd/320:30:013
16562995726,6cyclictest41-21ksoftirqd/323:45:153
2847191560,5ptp4l0-21swapper/220:19:342
2847191560,3ptp4l0-21swapper/120:45:191
16562995624,7cyclictest41-21ksoftirqd/321:35:213
16562995624,5cyclictest41-21ksoftirqd/320:20:143
16562995624,5cyclictest41-21ksoftirqd/300:20:223
16562995623,8cyclictest41-21ksoftirqd/321:15:213
16562995623,7cyclictest41-21ksoftirqd/300:15:593
16559995625,9cyclictest25-21ksoftirqd/121:25:011
2847191550,3ptp4l0-21swapper/223:34:342
2847191550,3ptp4l0-21swapper/223:10:232
16562995526,9cyclictest41-21ksoftirqd/319:25:153
16562995526,8cyclictest41-21ksoftirqd/321:30:263
16562995523,9cyclictest41-21ksoftirqd/319:40:253
16562995523,8cyclictest41-21ksoftirqd/320:10:203
16562995521,7cyclictest41-21ksoftirqd/319:50:193
16559995519,4cyclictest25-21ksoftirqd/121:40:251
2847191540,4ptp4l0-21swapper/200:26:062
2847191540,4ptp4l0-21swapper/119:09:161
2847191540,3ptp4l0-21swapper/123:41:261
2847191540,3ptp4l0-21swapper/119:40:121
16559995420,6cyclictest25-21ksoftirqd/123:35:151
2847191530,4ptp4l0-21swapper/000:22:080
2847191530,4ptp4l0-21swapper/000:14:060
2847191530,3ptp4l0-21swapper/022:34:220
16562995324,9cyclictest41-21ksoftirqd/322:10:203
16562995322,6cyclictest41-21ksoftirqd/300:25:293
16562995322,4cyclictest41-21ksoftirqd/300:00:153
16562995320,8cyclictest41-21ksoftirqd/323:00:263
16562995320,8cyclictest41-21ksoftirqd/323:00:263
16562995318,4cyclictest41-21ksoftirqd/320:15:143
16559995318,7cyclictest25-21ksoftirqd/100:30:241
2847191520,4ptp4l0-21swapper/123:50:481
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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