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2026-08-15 - 22:57
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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 Sat Aug 15, 2026 12:45:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
175632760,4sleep217567-21irqrtprio08:35:192
134491730,5ptp4l0-21swapper/110:26:341
134491670,4ptp4l17489-21iostat09:45:182
924299651,61cyclictest8477-21kworker/1:207:55:081
924499607,11cyclictest0-21swapper/310:02:253
9244996052,6cyclictest6501-21phc2sys10:30:243
924499603,6cyclictest401ktimersoftd/310:30:003
9243995930,3cyclictest33-21ksoftirqd/210:48:502
924299591,55cyclictest27441-21kworker/1:010:46:291
924499587,7cyclictest0-21swapper/310:20:163
9243995823,4cyclictest33-21ksoftirqd/207:50:212
924299582,54cyclictest8477-21kworker/1:207:54:081
24792580,6sleep0924199cyclictest11:30:210
134491580,3ptp4l0-21swapper/312:05:033
924499574,6cyclictest0-21swapper/308:50:213
9243995726,3cyclictest33-21ksoftirqd/210:19:392
9243995725,4cyclictest33-21ksoftirqd/211:15:162
134491570,3ptp4l0-21swapper/209:35:052
134491570,3ptp4l0-21swapper/010:10:160
924499566,6cyclictest0-21swapper/308:45:233
9243995622,3cyclictest33-21ksoftirqd/208:00:012
9243995621,4cyclictest33-21ksoftirqd/210:35:162
134491560,3ptp4l0-21swapper/112:19:231
924499555,6cyclictest0-21swapper/309:20:213
924499553,6cyclictest6015-21cat11:40:013
924499550,3cyclictest134491ptp4l07:50:153
134491550,4ptp4l0-21swapper/010:53:590
924499544,6cyclictest0-21swapper/310:10:253
924499543,6cyclictest0-21swapper/309:35:173
924499542,6cyclictest6879-21latency_hist08:15:003
924499542,37cyclictest0-21swapper/307:29:533
9243995423,5cyclictest33-21ksoftirqd/211:50:142
134491540,4ptp4l0-21swapper/211:47:322
134491540,4ptp4l0-21swapper/211:39:322
134491540,4ptp4l0-21swapper/008:28:140
134491540,3ptp4l0-21swapper/208:10:272
134491540,3ptp4l0-21swapper/110:40:131
134491540,3ptp4l0-21swapper/011:50:240
924499537,7cyclictest0-21swapper/309:59:083
924499537,6cyclictest0-21swapper/308:29:553
924499534,6cyclictest0-21swapper/307:20:213
924499533,6cyclictest11580-21cut11:50:203
924499532,30cyclictest0-21swapper/307:12:143
924499531,6cyclictest5097-21latency_hist09:20:003
9243995325,3cyclictest33-21ksoftirqd/208:50:002
9243995323,3cyclictest33-21ksoftirqd/210:55:002
9243995323,3cyclictest33-21ksoftirqd/207:10:182
9243995319,10cyclictest33-21ksoftirqd/210:00:182
134491530,4ptp4l0-21swapper/207:27:112
134491530,4ptp4l0-21swapper/207:18:272
924499527,8cyclictest0-21swapper/312:21:343
924499527,6cyclictest0-21swapper/307:41:433
924499525,11cyclictest0-21swapper/312:25:143
924499522,35cyclictest0-21swapper/309:14:593
924499522,35cyclictest0-21swapper/307:19:583
924499521,7cyclictest401ktimersoftd/311:40:203
924499521,6cyclictest41-21ksoftirqd/311:15:273
924499521,6cyclictest1540-21cpuspeed_turbos11:30:143
924499520,6cyclictest19194-21sendmail-msp11:00:003
9243995222,4cyclictest33-21ksoftirqd/210:20:302
134491520,5ptp4l0-21swapper/212:09:382
924499517,6cyclictest0-21swapper/312:19:093
924499512,6cyclictest41-21ksoftirqd/308:35:153
924499512,24cyclictest0-21swapper/308:55:233
924499510,5cyclictest0-21swapper/311:25:013
924499510,5cyclictest0-21swapper/311:25:013
9243995127,7cyclictest33-21ksoftirqd/207:21:022
9243995122,3cyclictest33-21ksoftirqd/210:44:242
9243995121,4cyclictest33-21ksoftirqd/207:45:002
9243995118,4cyclictest33-21ksoftirqd/212:30:002
134491510,5ptp4l0-21swapper/007:05:210
134491510,5ptp4l0-21swapper/007:05:210
134491510,4ptp4l0-21swapper/209:56:092
134491510,4ptp4l0-21swapper/209:34:542
134491510,2ptp4l0-21swapper/009:41:200
134491510,11ptp4l0-21swapper/010:02:210
924499507,6cyclictest0-21swapper/309:40:593
924499507,6cyclictest0-21swapper/307:37:423
924499506,7cyclictest0-21swapper/312:00:033
924499505,11cyclictest0-21swapper/312:34:243
924499503,5cyclictest20412-21mailstats08:40:263
924499502,5cyclictest0-21swapper/308:20:213
924499501,7cyclictest41-21ksoftirqd/311:45:223
924499501,6cyclictest8477-21cut10:35:193
9243995021,4cyclictest33-21ksoftirqd/208:55:152
134491500,4ptp4l0-21swapper/212:00:302
134491500,11ptp4l0-21swapper/009:31:020
924499497,6cyclictest0-21swapper/309:02:033
924499496,7cyclictest0-21swapper/308:16:233
924499496,6cyclictest0-21swapper/308:06:233
924499494,6cyclictest20288-21sed11:00:193
924499492,7cyclictest41-21ksoftirqd/307:30:003
924499492,6cyclictest27584-21sed10:05:273
924499492,11cyclictest22091-21cat12:15:003
924499491,6cyclictest41-21ksoftirqd/310:40:153
9243994937,3cyclictest33-21ksoftirqd/212:15:182
9243994918,4cyclictest33-21ksoftirqd/207:35:282
9243994917,4cyclictest33-21ksoftirqd/211:25:002
9243994917,4cyclictest33-21ksoftirqd/211:25:002
134491490,6ptp4l0-21swapper/207:09:512
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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