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2026-08-14 - 12:32
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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 Aug 14, 2026 00:45:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2838421370,3sleep01729599cyclictest21:50:310
134491750,3ptp4l0-21swapper/019:20:170
17296997131,4cyclictest25-21ksoftirqd/122:10:171
17296996727,8cyclictest25-21ksoftirqd/121:45:291
1729899666,15cyclictest30198-21/usr/sbin/munin00:15:163
1729899666,10cyclictest20727-21sed21:35:203
1729899666,10cyclictest20727-21sed21:35:203
17296996528,7cyclictest25-21ksoftirqd/100:15:211
1729899649,10cyclictest26672-21latency_hist20:40:003
17298996410,10cyclictest17336-21sed20:20:003
134491640,5ptp4l0-21swapper/020:50:120
17298996310,9cyclictest29438-21cat23:05:003
1729899626,10cyclictest0-21swapper/319:10:193
1729899625,11cyclictest9117-21cut20:00:193
17296996229,7cyclictest25-21ksoftirqd/119:40:141
134491620,18ptp4l0-21swapper/019:55:250
134491620,18ptp4l0-21swapper/019:55:250
3102610,4sleep20-21swapper/220:50:242
1729899614,11cyclictest3040-21cut00:25:213
134491600,4ptp4l0-21swapper/023:32:530
134491600,2ptp4l18767-21kworker/2:122:49:342
1729899599,10cyclictest16635-21sed23:45:213
1729899596,11cyclictest8205-21sed00:35:273
1729899595,12cyclictest29224-21tail00:10:273
1729899595,11cyclictest31280-21latency_hist20:50:003
1729899594,9cyclictest448-21dbus-daemon22:25:263
17296995923,9cyclictest25-21ksoftirqd/119:45:271
134491590,4ptp4l0-21swapper/222:00:232
134491590,4ptp4l0-21swapper/221:53:532
1729899588,9cyclictest8278-21latency_hist21:10:003
1729899586,11cyclictest0-21swapper/321:45:213
1729899585,10cyclictest0-21swapper/322:55:003
134491580,4ptp4l0-21swapper/121:05:221
134491580,3ptp4l0-21swapper/322:35:273
134491580,3ptp4l0-21swapper/319:21:323
1729899579,10cyclictest27420-21awk00:10:003
1729899575,9cyclictest0-21swapper/321:20:303
1729899575,10cyclictest0-21swapper/322:30:273
1729899574,11cyclictest27039-21if_enp4s019:30:183
1729899574,11cyclictest0-21swapper/321:10:253
17296995722,7cyclictest25-21ksoftirqd/119:35:251
134491570,3ptp4l0-21swapper/200:10:122
134491570,3ptp4l0-21swapper/022:26:590
1729899568,6cyclictest134491ptp4l21:30:303
1729899563,11cyclictest31135-21/usr/sbin/munin19:40:273
1729699564,3cyclictest121rcu_preempt21:20:001
17296995624,10cyclictest25-21ksoftirqd/122:15:131
134491560,5ptp4l0-21swapper/219:06:472
134491560,4ptp4l0-21swapper/219:42:542
134491560,3ptp4l0-21swapper/222:40:252
134491560,3ptp4l0-21swapper/222:40:242
134491560,16ptp4l0-21swapper/223:46:582
1729899559,10cyclictest9534-21sed22:20:203
1729899555,10cyclictest30508-21sed23:05:203
1729899553,10cyclictest14263-21switchtime20:10:253
1729699552,6cyclictest13411-21cat20:10:171
134491550,5ptp4l0-21swapper/222:05:132
134491550,5ptp4l0-21swapper/019:40:130
134491550,4ptp4l0-21swapper/221:32:072
134491550,4ptp4l0-21swapper/023:49:340
134491550,3ptp4l0-21swapper/221:39:492
134491550,3ptp4l0-21swapper/221:39:492
1729899547,6cyclictest0-21swapper/320:58:543
1729899547,10cyclictest6418-21cat23:25:013
17296995425,7cyclictest25-21ksoftirqd/123:39:151
17296995422,7cyclictest25-21ksoftirqd/121:35:151
17296995422,7cyclictest25-21ksoftirqd/121:35:151
17296995422,6cyclictest25-21ksoftirqd/119:50:251
17296995421,8cyclictest25-21ksoftirqd/121:55:291
17296995421,7cyclictest25-21ksoftirqd/119:55:171
17296995421,7cyclictest25-21ksoftirqd/119:55:171
134491540,4ptp4l0-21swapper/219:21:392
1729899537,5cyclictest0-21swapper/320:40:453
1729899536,10cyclictest0-21swapper/300:20:143
1729699533,5cyclictest25-21ksoftirqd/119:15:181
17296995319,7cyclictest25-21ksoftirqd/122:36:371
134491530,4ptp4l0-21swapper/219:28:252
134491530,12ptp4l0-21swapper/019:35:170
1729899527,5cyclictest0-21swapper/320:23:203
1729899526,10cyclictest0-21swapper/321:58:243
1729899523,10cyclictest31920-21cat22:00:173
1729699527,7cyclictest10654-21cron22:25:001
1729699524,7cyclictest25-21ksoftirqd/123:10:001
1729699523,8cyclictest25-21ksoftirqd/120:45:271
1729699523,7cyclictest25-21ksoftirqd/121:45:011
1729699522,6cyclictest25-21ksoftirqd/123:25:261
1729699522,6cyclictest25-21ksoftirqd/120:50:211
17296995225,9cyclictest25-21ksoftirqd/100:30:151
1729699521,6cyclictest241ktimersoftd/121:35:001
1729699520,16cyclictest25-21ksoftirqd/123:45:251
1729899518,15cyclictest11031-21/usr/sbin/munin23:35:253
1729899517,5cyclictest0-21swapper/323:52:203
1729899516,6cyclictest0-21swapper/322:05:143
1729899515,9cyclictest0-21swapper/320:50:183
1729699514,9cyclictest25-21ksoftirqd/120:35:001
1729699512,12cyclictest0-21swapper/119:30:151
1729699510,5cyclictest25-21ksoftirqd/100:05:251
134491510,4ptp4l0-21swapper/200:23:502
134491510,4ptp4l0-21swapper/123:20:141
134491510,4ptp4l0-21swapper/000:09:340
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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