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2026-04-28 - 19:50
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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 28, 2026 12:45:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3269721600,3sleep12181599cyclictest09:50:181
813421590,4sleep32181799cyclictest10:05:283
179212770,1sleep317922-21/usr/sbin/munin08:10:153
21816996734,4cyclictest33-21ksoftirqd/207:30:192
21816996733,6cyclictest33-21ksoftirqd/210:10:002
21815996732,6cyclictest25-21ksoftirqd/111:30:001
21816996630,8cyclictest33-21ksoftirqd/210:35:162
21816996531,7cyclictest33-21ksoftirqd/211:50:242
134491650,15ptp4l0-21swapper/007:45:190
21816996330,9cyclictest33-21ksoftirqd/211:25:272
21816996328,6cyclictest33-21ksoftirqd/209:55:252
21815996328,8cyclictest25-21ksoftirqd/110:38:431
21816996232,6cyclictest33-21ksoftirqd/208:40:182
21816996231,9cyclictest33-21ksoftirqd/210:30:282
21816996230,5cyclictest33-21ksoftirqd/211:55:142
21816996225,5cyclictest33-21ksoftirqd/207:20:132
21815996229,7cyclictest25-21ksoftirqd/108:10:251
21815996229,6cyclictest25-21ksoftirqd/111:50:181
21816996131,8cyclictest33-21ksoftirqd/207:35:262
21816996131,5cyclictest33-21ksoftirqd/212:20:152
21816996130,4cyclictest33-21ksoftirqd/209:46:132
21816996128,4cyclictest33-21ksoftirqd/210:49:352
21816996126,7cyclictest33-21ksoftirqd/211:22:212
21816996032,6cyclictest33-21ksoftirqd/208:20:252
21816996031,6cyclictest33-21ksoftirqd/208:10:142
21816996029,9cyclictest33-21ksoftirqd/208:15:142
21816996028,4cyclictest33-21ksoftirqd/207:15:002
21816996027,5cyclictest33-21ksoftirqd/209:10:262
21816996024,6cyclictest33-21ksoftirqd/207:17:052
21815996028,7cyclictest25-21ksoftirqd/110:15:161
134491600,3ptp4l0-21swapper/111:40:211
21816995933,8cyclictest33-21ksoftirqd/207:25:212
21816995928,9cyclictest33-21ksoftirqd/211:30:162
21816995928,8cyclictest33-21ksoftirqd/211:00:012
21816995928,8cyclictest33-21ksoftirqd/211:00:002
21816995925,7cyclictest33-21ksoftirqd/212:25:142
21816995925,7cyclictest33-21ksoftirqd/212:10:232
21816995925,5cyclictest33-21ksoftirqd/209:05:282
21815995928,5cyclictest25-21ksoftirqd/111:10:131
21816995829,9cyclictest33-21ksoftirqd/211:05:182
21816995829,10cyclictest33-21ksoftirqd/209:35:132
21816995827,5cyclictest33-21ksoftirqd/207:40:212
21816995823,3cyclictest33-21ksoftirqd/208:38:222
21815995828,8cyclictest25-21ksoftirqd/111:45:131
134491580,4ptp4l0-21swapper/011:29:030
134491580,3ptp4l0-21swapper/008:17:480
21816995730,4cyclictest33-21ksoftirqd/212:15:142
21816995729,8cyclictest33-21ksoftirqd/209:40:202
134491570,3ptp4l0-21swapper/107:20:151
21816995629,9cyclictest33-21ksoftirqd/212:35:172
21816995628,4cyclictest33-21ksoftirqd/207:50:282
21816995627,9cyclictest33-21ksoftirqd/212:30:172
21816995627,8cyclictest33-21ksoftirqd/211:40:002
21816995624,5cyclictest33-21ksoftirqd/209:00:202
21816995620,4cyclictest33-21ksoftirqd/210:23:412
21815995627,8cyclictest25-21ksoftirqd/110:10:261
21815995621,7cyclictest25-21ksoftirqd/107:10:191
134491560,3ptp4l0-21swapper/112:24:471
134491560,3ptp4l0-21swapper/108:50:231
21816995526,10cyclictest33-21ksoftirqd/212:05:192
21816995523,8cyclictest33-21ksoftirqd/208:25:212
21815995521,6cyclictest25-21ksoftirqd/108:15:131
21815995520,6cyclictest25-21ksoftirqd/110:44:481
134491550,4ptp4l0-21swapper/012:04:290
134491550,4ptp4l0-21swapper/009:45:260
134491550,3ptp4l0-21swapper/110:20:171
134491550,3ptp4l0-21swapper/010:45:140
2181699546,6cyclictest33-21ksoftirqd/209:50:282
134491540,3ptp4l41-21ksoftirqd/311:05:233
2181599536,10cyclictest25-21ksoftirqd/111:30:271
2181599535,8cyclictest25-21ksoftirqd/109:20:241
2181599533,6cyclictest25-21ksoftirqd/109:00:191
2181599533,5cyclictest241ktimersoftd/107:55:261
21815995322,7cyclictest25-21ksoftirqd/111:20:171
21815995322,7cyclictest25-21ksoftirqd/107:25:131
21815995320,7cyclictest25-21ksoftirqd/108:25:241
21815995318,7cyclictest25-21ksoftirqd/108:00:291
21815995318,7cyclictest25-21ksoftirqd/108:00:291
134491530,5ptp4l0-21swapper/010:28:110
134491530,4ptp4l0-21swapper/109:38:561
2181699528,5cyclictest21732-21phc2sys-jitter09:25:232
2181599525,8cyclictest25-21ksoftirqd/110:25:151
2181599524,8cyclictest25-21ksoftirqd/110:50:191
21815995216,8cyclictest25-21ksoftirqd/112:34:121
134491520,5ptp4l0-21swapper/007:07:370
134491520,18ptp4l9-21ksoftirqd/011:19:110
2181699515,5cyclictest28928-21latency_hist08:35:012
2181699514,5cyclictest33-21ksoftirqd/211:40:162
2181699514,10cyclictest33-21ksoftirqd/210:50:142
2181699512,5cyclictest33-21ksoftirqd/209:15:242
2181699512,11cyclictest0-21swapper/208:50:172
2181599515,5cyclictest25-21ksoftirqd/111:05:281
21815995122,4cyclictest25-21ksoftirqd/112:35:151
2181599511,5cyclictest25-21ksoftirqd/112:00:221
2181599510,6cyclictest17939-21wc09:20:001
2181699505,10cyclictest33-21ksoftirqd/209:30:292
2181699503,8cyclictest33-21ksoftirqd/211:50:012
2181699503,7cyclictest0-21swapper/208:45:202
2181699502,6cyclictest0-21swapper/210:15:122
2181699502,6cyclictest0-21swapper/207:55:182
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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