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2026-06-26 - 21:04
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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 Jun 26, 2026 12:45:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21664997033,4cyclictest9-21ksoftirqd/007:40:000
2166599692,55cyclictest20675-21cut10:35:181
21665996815,49cyclictest6264-21/usr/sbin/munin08:55:161
21665996615,48cyclictest30640-21seq07:29:531
21665996513,11cyclictest12373-21chrt10:16:431
21665996513,11cyclictest12373-21chrt10:16:431
2166599647,11cyclictest25078-21ntpq07:15:261
21665996411,9cyclictest4068-21sed07:40:191
2166599639,12cyclictest17278-21df_abs08:10:141
2166599638,10cyclictest0-21swapper/108:05:141
2166599629,11cyclictest10335-21df_abs07:55:151
2166599628,20cyclictest0-21swapper/111:55:171
2166599628,11cyclictest10414-21timerwakeupswit12:30:261
2166599627,12cyclictest30933-21awk10:55:261
2166599622,12cyclictest13218-21cut08:00:181
21665996212,11cyclictest1188-21taskset12:12:141
21665996212,10cyclictest31374-21chrt12:08:051
21665996211,11cyclictest22150-21chrt10:40:021
2166599619,11cyclictest6975-21ls07:45:271
2166599617,10cyclictest3128-21timerwakeupswit11:05:261
2166599617,10cyclictest1812-21sed07:35:201
2166599613,17cyclictest0-21swapper/109:00:121
2166599613,17cyclictest0-21swapper/109:00:121
21665996112,9cyclictest14372-21ps11:30:251
21665996112,11cyclictest3265-21chrt09:58:011
21664996127,5cyclictest9-21ksoftirqd/009:20:000
21664996126,3cyclictest9-21ksoftirqd/012:19:590
55892600,5sleep20-21swapper/212:20:252
2166599608,9cyclictest20696-21missed_timers09:25:211
2166599608,11cyclictest9987-21timerandwakeup11:20:271
2166599607,9cyclictest4979-21expr10:00:251
2166599607,11cyclictest1122-21date09:55:011
2166599606,11cyclictest8968-21cut10:10:171
2166599605,10cyclictest0-21swapper/111:35:221
2166599598,12cyclictest26901-21cut08:30:191
2166599598,10cyclictest0-21swapper/110:50:211
2166599597,11cyclictest4027-21cpuspeed_turbos11:10:131
2166599595,9cyclictest29815-21cat09:45:191
2166599595,9cyclictest0-21swapper/108:40:251
2166599595,17cyclictest0-21swapper/111:45:171
2166599595,11cyclictest6770-21irqrtprio11:15:181
134491590,3ptp4l0-21swapper/012:05:220
2166599589,8cyclictest4437-21ntp_states08:50:241
2166599588,11cyclictest11513-21grep12:35:151
2166599586,11cyclictest0-21swapper/107:55:001
2166599586,11cyclictest0-21swapper/107:55:001
2166599583,16cyclictest0-21swapper/111:00:161
21664995829,4cyclictest9-21ksoftirqd/011:05:210
21664995828,4cyclictest9-21ksoftirqd/011:55:000
2166599579,16cyclictest6232-21df_abs10:05:121
2166599576,10cyclictest27639-21cat12:00:161
21664995733,3cyclictest9-21ksoftirqd/009:35:110
21664995725,4cyclictest9-21ksoftirqd/008:15:000
21664995724,9cyclictest9-21ksoftirqd/009:05:170
21664995724,9cyclictest9-21ksoftirqd/009:05:170
21664995722,4cyclictest9-21ksoftirqd/009:05:000
21664995722,4cyclictest9-21ksoftirqd/009:05:000
134491570,4ptp4l0-21swapper/310:10:243
134491570,3ptp4l11152-21/usr/sbin/munin12:35:223
134491570,3ptp4l0-21swapper/109:37:321
21665995612,10cyclictest18840-21ssh09:20:251
134491560,4ptp4l0-21swapper/209:37:532
134491560,4ptp4l0-21swapper/009:12:350
134491560,3ptp4l0-21swapper/208:31:002
134491560,3ptp4l0-21swapper/008:20:240
134491560,3ptp4l0-21swapper/008:20:240
33952550,3sleep23398-21unixbench_singl12:15:272
21664995525,5cyclictest9-21ksoftirqd/009:45:130
21664995524,4cyclictest9-21ksoftirqd/007:50:000
21664995520,6cyclictest9-21ksoftirqd/011:20:010
21664995519,5cyclictest9-21ksoftirqd/007:15:000
134491550,4ptp4l0-21swapper/107:05:191
134491550,4ptp4l0-21swapper/107:05:191
134491550,4ptp4l0-21swapper/011:34:150
134491550,3ptp4l0-21swapper/107:30:221
134491550,13ptp4l0-21swapper/210:36:552
21664995420,5cyclictest9-21ksoftirqd/007:15:320
134491540,4ptp4l0-21swapper/211:24:512
134491540,4ptp4l0-21swapper/009:58:120
134491540,4ptp4l0-21swapper/009:44:490
134491540,4ptp4l0-21swapper/009:32:230
134491540,3ptp4l0-21swapper/007:59:040
2166599539,41cyclictest24856-21sort08:25:201
2166599537,11cyclictest12895-21/usr/sbin/munin10:20:181
2166599534,11cyclictest6331-21latency_hist12:25:001
21664995325,7cyclictest9-21ksoftirqd/012:00:240
21664995324,7cyclictest9-21ksoftirqd/010:55:240
21664995322,5cyclictest9-21ksoftirqd/008:25:140
21664995322,5cyclictest9-21ksoftirqd/007:40:270
21664995320,5cyclictest9-21ksoftirqd/010:00:140
134491530,4ptp4l0-21swapper/312:17:033
134491530,4ptp4l0-21swapper/310:19:183
134491530,4ptp4l0-21swapper/310:19:183
134491530,4ptp4l0-21swapper/208:25:432
21665995212,36cyclictest11271-21ls11:25:151
21664995222,3cyclictest9-21ksoftirqd/011:45:240
21664995221,4cyclictest9-21ksoftirqd/008:30:160
21664995218,6cyclictest9-21ksoftirqd/009:25:200
134491520,9ptp4l19333-21apt-get07:05:143
134491520,9ptp4l19333-21apt-get07:05:143
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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