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2026-04-22 - 20:07
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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 Wed Apr 22, 2026 12:45:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491670,4ptp4l10776-21cat12:20:193
134491620,4ptp4l26851-21ntp_states11:45:212
134491620,4ptp4l0-21swapper/212:23:032
134491600,5ptp4l0-21swapper/211:20:132
134491600,4ptp4l11402-21apt-get11:15:021
27364995930,7cyclictest25-21ksoftirqd/111:49:371
134491590,3ptp4l0-21swapper/011:15:020
27364995827,4cyclictest25-21ksoftirqd/110:19:551
134491580,3ptp4l0-21swapper/009:57:200
27364995725,4cyclictest25-21ksoftirqd/112:06:071
134491570,4ptp4l0-21swapper/107:06:591
134491570,3ptp4l0-21swapper/308:03:193
27364995626,6cyclictest25-21ksoftirqd/111:09:371
27364995626,4cyclictest25-21ksoftirqd/109:50:151
134491560,17ptp4l0-21swapper/007:50:470
27364995526,7cyclictest25-21ksoftirqd/109:55:191
27364995526,3cyclictest25-21ksoftirqd/110:44:101
27364995526,3cyclictest25-21ksoftirqd/110:44:101
27364995524,4cyclictest25-21ksoftirqd/110:48:391
134491550,3ptp4l0-21swapper/311:50:173
27364995429,6cyclictest25-21ksoftirqd/112:00:591
27364995426,6cyclictest25-21ksoftirqd/107:31:061
27364995423,3cyclictest25-21ksoftirqd/109:50:001
27364995418,7cyclictest25-21ksoftirqd/109:25:191
134491540,3ptp4l0-21swapper/110:58:171
27364995326,7cyclictest25-21ksoftirqd/110:38:321
27364995324,3cyclictest25-21ksoftirqd/111:34:001
27364995322,4cyclictest25-21ksoftirqd/110:23:361
27364995320,3cyclictest25-21ksoftirqd/109:30:561
27364995319,4cyclictest25-21ksoftirqd/108:15:201
27364995316,4cyclictest25-21ksoftirqd/108:55:261
134491530,4ptp4l0-21swapper/012:06:060
134491530,3ptp4l0-21swapper/108:43:541
134491530,3ptp4l0-21swapper/107:28:151
27364995221,8cyclictest25-21ksoftirqd/107:45:131
27364995221,7cyclictest25-21ksoftirqd/108:25:191
27364995217,7cyclictest25-21ksoftirqd/108:05:211
27364995217,6cyclictest25-21ksoftirqd/109:00:241
27364995216,4cyclictest25-21ksoftirqd/110:30:001
134491520,4ptp4l0-21swapper/011:03:160
134491520,4ptp4l0-21swapper/010:27:020
134491520,4ptp4l0-21swapper/008:33:480
134491520,3ptp4l0-21swapper/110:05:071
134491520,3ptp4l0-21swapper/010:30:130
27364995125,7cyclictest25-21ksoftirqd/111:57:591
27364995122,7cyclictest25-21ksoftirqd/112:35:221
134491510,8ptp4l25590-21iostat07:05:150
134491510,4ptp4l14238-21apt-get11:20:123
134491510,4ptp4l0-21swapper/210:07:552
134491510,4ptp4l0-21swapper/107:23:131
27364995037,3cyclictest25-21ksoftirqd/112:30:001
27364995024,6cyclictest25-21ksoftirqd/109:19:161
27364995016,7cyclictest25-21ksoftirqd/110:30:151
27364995012,8cyclictest25-21ksoftirqd/108:00:141
134491500,4ptp4l0-21swapper/207:08:252
134491500,4ptp4l0-21swapper/011:06:140
134491500,4ptp4l0-21swapper/008:52:170
134491500,3ptp4l0-21swapper/008:09:510
27364994920,6cyclictest25-21ksoftirqd/112:30:271
27364994919,4cyclictest25-21ksoftirqd/107:55:171
27364994918,4cyclictest25-21ksoftirqd/109:40:171
27364994918,2cyclictest25-21ksoftirqd/109:13:441
27364994916,3cyclictest25-21ksoftirqd/111:22:331
134491490,4ptp4l0-21swapper/209:38:132
134491490,4ptp4l0-21swapper/109:39:321
134491490,4ptp4l0-21swapper/107:42:521
134491490,4ptp4l0-21swapper/007:38:250
27364994820,7cyclictest25-21ksoftirqd/112:15:181
27364994816,2cyclictest25-21ksoftirqd/110:12:421
27364994815,3cyclictest25-21ksoftirqd/109:05:211
27364994814,4cyclictest25-21ksoftirqd/107:50:131
134491480,4ptp4l0-21swapper/312:11:383
134491480,4ptp4l0-21swapper/012:37:220
134491480,4ptp4l0-21swapper/009:53:380
134491480,3ptp4l0-21swapper/111:02:251
134491480,3ptp4l0-21swapper/107:37:151
134491480,3ptp4l0-21swapper/007:42:090
27364994716,4cyclictest25-21ksoftirqd/107:15:271
134491470,4ptp4l0-21swapper/209:27:152
134491470,4ptp4l0-21swapper/109:22:201
134491470,4ptp4l0-21swapper/008:29:530
134491470,3ptp4l0-21swapper/111:25:031
134491470,3ptp4l0-21swapper/009:40:510
27364994615,9cyclictest25-21ksoftirqd/111:15:011
2736499457,6cyclictest25-21ksoftirqd/111:40:211
2736499455,6cyclictest25-21ksoftirqd/107:10:221
27364994534,3cyclictest25-21ksoftirqd/108:50:011
134491450,4ptp4l32165-21apt-get08:30:143
134491450,4ptp4l0-21swapper/209:34:182
134491450,4ptp4l0-21swapper/110:04:011
134491450,4ptp4l0-21swapper/108:12:341
134491450,10ptp4l0-21swapper/209:00:212
27364994439,3cyclictest25-21ksoftirqd/112:25:001
27364994438,3cyclictest25-21ksoftirqd/110:50:271
2736499442,3cyclictest121rcu_preempt08:35:011
27364994412,6cyclictest25-21ksoftirqd/112:15:011
134491440,9ptp4l0-21swapper/010:22:450
134491440,6ptp4l0-21swapper/207:50:192
134491440,4ptp4l2609-21apt-get12:05:112
134491440,4ptp4l0-21swapper/307:08:273
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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