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2025-12-14 - 07:56
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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 Sun Dec 14, 2025 00:45:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491680,5ptp4l18913-21threads00:10:352
134491660,34ptp4l9-21ksoftirqd/023:15:310
684926559,4sleep00-21swapper/019:09:230
134491650,4ptp4l0-21swapper/220:15:252
134491650,4ptp4l0-21swapper/023:40:230
28172620,4sleep12818-21latency_hist21:20:011
134491600,3ptp4l0-21swapper/123:35:001
134491590,3ptp4l0-21swapper/120:44:291
134491580,4ptp4l0-21swapper/221:44:222
134491580,4ptp4l0-21swapper/122:00:341
134491580,3ptp4l0-21swapper/319:16:523
134491580,3ptp4l0-21swapper/300:30:503
134491580,3ptp4l0-21swapper/122:37:101
134491580,3ptp4l0-21swapper/121:20:321
134491580,15ptp4l0-21swapper/319:56:193
134491570,3ptp4l0-21swapper/000:35:370
61702560,4sleep20-21swapper/219:05:272
134491550,4ptp4l0-21swapper/321:50:063
134491550,3ptp4l0-21swapper/000:07:290
718999547,6cyclictest0-21swapper/123:49:061
718999547,6cyclictest0-21swapper/121:43:111
718999544,7cyclictest25-21ksoftirqd/100:25:311
144992540,3sleep20-21swapper/221:45:012
134491540,5ptp4l0-21swapper/222:27:402
134491540,4ptp4l0-21swapper/223:44:352
134491540,3ptp4l0-21swapper/023:48:390
718999536,10cyclictest0-21swapper/122:30:561
134491530,4ptp4l0-21swapper/220:00:382
134491530,3ptp4l0-21swapper/321:55:053
134491530,3ptp4l0-21swapper/120:20:251
718999528,6cyclictest0-21swapper/123:21:261
718999527,6cyclictest0-21swapper/100:15:591
718999520,11cyclictest11743-21chrt21:38:421
134491520,4ptp4l0-21swapper/320:43:583
134491520,4ptp4l0-21swapper/222:50:522
134491520,4ptp4l0-21swapper/220:20:512
134491520,4ptp4l0-21swapper/220:10:232
134491520,3ptp4l3314-21apt-get22:30:222
718999516,8cyclictest0-21swapper/123:29:171
718999514,6cyclictest0-21swapper/120:35:221
718999514,6cyclictest0-21swapper/120:35:221
134491510,5ptp4l0-21swapper/319:09:023
134491510,4ptp4l0-21swapper/321:30:023
134491510,4ptp4l0-21swapper/223:07:292
134491510,4ptp4l0-21swapper/222:41:062
134491510,4ptp4l0-21swapper/222:37:142
134491510,4ptp4l0-21swapper/220:26:152
134491510,4ptp4l0-21swapper/219:36:222
134491510,3ptp4l0-21swapper/322:45:423
134491510,3ptp4l0-21swapper/322:02:403
134491510,11ptp4l0-21swapper/219:52:012
718999507,6cyclictest0-21swapper/122:52:381
718999506,8cyclictest0-21swapper/119:15:071
718999506,6cyclictest0-21swapper/121:10:091
718999502,6cyclictest25-21ksoftirqd/100:20:341
134491500,4ptp4l0-21swapper/320:59:513
134491500,4ptp4l0-21swapper/223:31:562
134491500,4ptp4l0-21swapper/223:01:092
134491500,4ptp4l0-21swapper/221:38:292
134491500,4ptp4l0-21swapper/221:12:532
134491500,4ptp4l0-21swapper/122:55:511
134491500,4ptp4l0-21swapper/121:03:431
134491500,4ptp4l0-21swapper/023:23:420
134491500,3ptp4l0-21swapper/019:50:350
718999493,6cyclictest25-21ksoftirqd/122:45:261
718999493,6cyclictest25-21ksoftirqd/121:25:231
7189994912,6cyclictest10113-21hddtemp_smartct20:25:231
718999490,12cyclictest19203-21taskset00:11:031
134491490,8ptp4l5800-21ls19:05:221
134491490,4ptp4l0-21swapper/222:46:292
134491490,4ptp4l0-21swapper/122:27:031
134491490,4ptp4l0-21swapper/022:27:390
718999482,6cyclictest25-21ksoftirqd/119:45:271
718999482,6cyclictest25-21ksoftirqd/119:45:271
134491480,4ptp4l718899cyclictest22:00:000
134491480,4ptp4l0-21swapper/322:40:383
134491480,4ptp4l0-21swapper/219:43:342
134491480,4ptp4l0-21swapper/123:41:401
134491480,3ptp4l0-21swapper/020:41:080
718999476,11cyclictest0-21swapper/121:48:071
718999474,6cyclictest0-21swapper/120:45:341
718999472,6cyclictest25-21ksoftirqd/122:05:351
134491470,5ptp4l0-21swapper/023:34:130
134491470,4ptp4l0-21swapper/321:01:003
134491470,4ptp4l0-21swapper/120:53:121
134491470,4ptp4l0-21swapper/020:18:100
134491470,3ptp4l0-21swapper/319:27:033
134491470,3ptp4l0-21swapper/319:23:523
134491470,3ptp4l0-21swapper/123:51:411
134491470,3ptp4l0-21swapper/100:30:051
134491470,3ptp4l0-21swapper/000:23:140
134491470,2ptp4l121rcu_preempt20:50:323
718999463,5cyclictest0-21swapper/120:10:301
718999460,7cyclictest25-21ksoftirqd/123:16:501
718999460,7cyclictest25-21ksoftirqd/121:53:261
134491460,15ptp4l9-21ksoftirqd/022:14:050
718999457,7cyclictest0-21swapper/122:23:171
718999451,6cyclictest25-21ksoftirqd/123:10:371
718999450,8cyclictest25-21ksoftirqd/119:30:311
718999450,6cyclictest25-21ksoftirqd/119:10:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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