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2026-05-01 - 15:52
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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 Fri May 01, 2026 12:45:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
129021730,6sleep01292-21unixbench_singl07:05:260
778821620,3sleep0199899cyclictest10:50:160
2373821440,4sleep2200099cyclictest07:55:192
134491750,39ptp4l41-21ksoftirqd/309:20:163
134491700,5ptp4l0-21swapper/211:15:122
168982670,5sleep30-21swapper/307:40:193
134491640,4ptp4l7256-21iostat07:20:150
134491640,18ptp4l8929-21apt-get08:35:122
134491630,4ptp4l0-21swapper/211:45:272
2001996232,10cyclictest41-21ksoftirqd/312:10:263
2001996230,4cyclictest41-21ksoftirqd/311:15:173
134491620,4ptp4l0-21swapper/207:50:002
134491600,4ptp4l0-21swapper/009:06:050
134491600,4ptp4l0-21swapper/008:30:210
134491600,18ptp4l0-21swapper/211:02:422
134491600,11ptp4l1545-21taskset07:08:082
134491590,4ptp4l0-21swapper/008:05:230
202152580,3sleep00-21swapper/010:05:260
134491580,4ptp4l0-21swapper/208:55:212
200199575,6cyclictest0-21swapper/309:34:273
200199574,7cyclictest0-21swapper/308:40:273
134491570,3ptp4l0-21swapper/210:30:212
134491560,4ptp4l0-21swapper/112:00:201
134491560,3ptp4l0-21swapper/311:53:423
134491560,3ptp4l0-21swapper/207:10:552
200199554,7cyclictest0-21swapper/307:25:163
200199553,6cyclictest0-21swapper/310:05:173
200199553,28cyclictest0-21swapper/309:01:193
200199552,34cyclictest0-21swapper/307:37:053
134491550,3ptp4l0-21swapper/311:40:313
134491550,3ptp4l0-21swapper/210:10:192
134491540,4ptp4l0-21swapper/207:54:562
200199534,6cyclictest0-21swapper/312:25:173
200199534,5cyclictest0-21swapper/311:39:283
200199532,6cyclictest0-21swapper/309:50:213
200199532,33cyclictest0-21swapper/310:25:423
200199532,33cyclictest0-21swapper/308:02:133
200199532,32cyclictest0-21swapper/307:32:003
134491530,4ptp4l0-21swapper/209:11:592
134491530,3ptp4l0-21swapper/209:49:422
200199525,7cyclictest0-21swapper/308:13:523
200199525,6cyclictest0-21swapper/309:49:263
200199524,6cyclictest0-21swapper/311:32:133
200199523,8cyclictest0-21swapper/308:50:233
200199522,32cyclictest0-21swapper/308:29:013
200199522,32cyclictest0-21swapper/308:29:013
200199522,31cyclictest0-21swapper/309:41:173
200199522,31cyclictest0-21swapper/308:06:143
200199521,8cyclictest41-21ksoftirqd/308:40:003
134491520,5ptp4l0-21swapper/208:03:292
134491520,4ptp4l0-21swapper/007:40:100
134491520,3ptp4l0-21swapper/209:15:242
134491520,3ptp4l0-21swapper/208:07:072
134491520,14ptp4l1835-21sed07:10:013
200199515,7cyclictest0-21swapper/311:57:523
200199515,6cyclictest0-21swapper/309:17:023
200199514,6cyclictest0-21swapper/312:36:083
200199514,6cyclictest0-21swapper/312:05:123
200199513,6cyclictest0-21swapper/310:15:273
200199512,33cyclictest0-21swapper/310:03:243
200199512,30cyclictest0-21swapper/309:57:183
134491510,5ptp4l0-21swapper/008:19:310
134491510,4ptp4l0-21swapper/011:47:000
134491510,3ptp4l0-21swapper/211:10:002
134491510,12ptp4l0-21swapper/207:31:352
134491510,11ptp4l0-21swapper/208:27:572
134491510,11ptp4l0-21swapper/208:27:572
200199503,6cyclictest0-21swapper/312:19:303
200199502,7cyclictest0-21swapper/307:55:213
200199502,6cyclictest0-21swapper/309:05:223
200199502,30cyclictest0-21swapper/308:46:133
200199500,8cyclictest134491ptp4l08:20:273
134491500,4ptp4l0-21swapper/210:58:112
134491500,4ptp4l0-21swapper/208:23:132
134491500,4ptp4l0-21swapper/010:23:550
134491500,3ptp4l0-21swapper/212:05:052
200199498,7cyclictest0-21swapper/310:45:253
200199494,6cyclictest0-21swapper/307:13:173
200199493,7cyclictest41-21ksoftirqd/311:25:123
200199493,7cyclictest41-21ksoftirqd/311:25:113
200199493,6cyclictest0-21swapper/311:10:153
200199493,11cyclictest0-21swapper/309:10:253
200199492,6cyclictest0-21swapper/311:05:173
134491490,3ptp4l0-21swapper/208:45:202
200199486,6cyclictest0-21swapper/312:00:463
200199485,2cyclictest41-21ksoftirqd/311:21:383
200199482,5cyclictest5531-21strings09:35:213
134491480,3ptp4l0-21swapper/111:38:011
200199475,6cyclictest0-21swapper/310:59:173
200199474,6cyclictest0-21swapper/312:20:383
200199474,6cyclictest0-21swapper/308:19:413
200199471,6cyclictest41-21ksoftirqd/310:50:143
134491470,4ptp4l0-21swapper/212:11:442
134491470,4ptp4l0-21swapper/211:54:152
134491470,3ptp4l0-21swapper/212:39:562
134491470,3ptp4l0-21swapper/211:32:152
134491470,3ptp4l0-21swapper/210:09:192
200199464,8cyclictest41-21ksoftirqd/307:52:413
200199464,6cyclictest0-21swapper/310:12:103
200199463,7cyclictest0-21swapper/309:26:563
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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