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2026-08-21 - 13:56
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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 21, 2026 00:45:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134491650,6ptp4l25-21ksoftirqd/119:26:591
10052996432,6cyclictest33-21ksoftirqd/223:15:242
10052996333,5cyclictest33-21ksoftirqd/222:50:222
10052996326,3cyclictest33-21ksoftirqd/220:44:132
10052996232,5cyclictest33-21ksoftirqd/222:10:142
10052996232,5cyclictest33-21ksoftirqd/222:10:142
10052996231,6cyclictest33-21ksoftirqd/222:55:162
1005299622,16cyclictest0-21swapper/219:42:582
185512610,5sleep018557-21timerwakeupswit19:25:280
10052996131,5cyclictest33-21ksoftirqd/220:25:142
134491600,5ptp4l0-21swapper/019:07:260
10052996031,3cyclictest33-21ksoftirqd/221:00:242
10052996030,4cyclictest33-21ksoftirqd/221:09:502
10052996028,4cyclictest33-21ksoftirqd/220:45:412
10052995931,6cyclictest33-21ksoftirqd/200:40:002
10052995928,4cyclictest33-21ksoftirqd/221:19:532
10052995927,3cyclictest33-21ksoftirqd/200:09:512
10052995925,6cyclictest33-21ksoftirqd/221:55:132
10052995828,8cyclictest33-21ksoftirqd/222:18:472
10052995828,7cyclictest33-21ksoftirqd/219:15:292
10052995824,10cyclictest33-21ksoftirqd/221:10:152
10052995823,5cyclictest33-21ksoftirqd/222:35:132
134491570,3ptp4l0-21swapper/123:30:141
134491570,3ptp4l0-21swapper/023:09:590
134491570,3ptp4l0-21swapper/021:10:220
10052995728,3cyclictest33-21ksoftirqd/219:10:192
10052995727,3cyclictest33-21ksoftirqd/223:55:292
10052995723,4cyclictest33-21ksoftirqd/221:30:282
10052995723,3cyclictest33-21ksoftirqd/221:40:262
10052995722,4cyclictest33-21ksoftirqd/200:34:502
10052995720,8cyclictest33-21ksoftirqd/219:20:442
10052995719,8cyclictest33-21ksoftirqd/220:18:282
10052995718,8cyclictest33-21ksoftirqd/223:43:002
134491560,3ptp4l0-21swapper/322:35:253
134491560,3ptp4l0-21swapper/022:37:010
10052995627,3cyclictest33-21ksoftirqd/222:20:202
10052995624,6cyclictest33-21ksoftirqd/221:50:242
10052995621,4cyclictest33-21ksoftirqd/223:09:512
10052995616,8cyclictest33-21ksoftirqd/200:11:522
134491550,3ptp4l0-21swapper/223:26:292
134491550,3ptp4l0-21swapper/121:30:201
134491550,3ptp4l0-21swapper/022:00:160
10052995530,6cyclictest33-21ksoftirqd/219:45:132
10052995528,6cyclictest33-21ksoftirqd/219:35:242
10052995527,7cyclictest33-21ksoftirqd/222:45:002
10052995526,3cyclictest33-21ksoftirqd/222:45:282
10052995519,8cyclictest33-21ksoftirqd/223:48:012
10052995519,8cyclictest33-21ksoftirqd/222:00:162
10052995518,7cyclictest33-21ksoftirqd/222:28:102
10052995518,6cyclictest33-21ksoftirqd/223:10:102
134491540,5ptp4l0-21swapper/322:20:033
10052995421,10cyclictest33-21ksoftirqd/222:30:232
10052995419,5cyclictest33-21ksoftirqd/223:50:102
10052995416,6cyclictest33-21ksoftirqd/200:15:272
134491530,3ptp4l0-21swapper/123:15:261
134491530,3ptp4l0-21swapper/100:30:301
134491530,11ptp4l0-21swapper/120:59:331
134491530,10ptp4l7715-21apt-get19:05:122
10052995334,17cyclictest33-21ksoftirqd/200:05:012
10052995314,8cyclictest33-21ksoftirqd/200:25:442
134491520,4ptp4l0-21swapper/021:22:370
134491510,4ptp4l0-21swapper/223:33:072
134491510,4ptp4l0-21swapper/220:08:422
134491510,3ptp4l0-21swapper/021:35:190
10052995128,6cyclictest33-21ksoftirqd/220:30:162
10052995123,7cyclictest33-21ksoftirqd/221:45:202
10052995114,8cyclictest33-21ksoftirqd/221:21:062
134491500,4ptp4l0-21swapper/219:54:252
134491500,4ptp4l0-21swapper/219:25:292
134491500,4ptp4l0-21swapper/023:30:310
134491500,4ptp4l0-21swapper/019:49:030
134491500,4ptp4l0-21swapper/000:11:360
134491500,14ptp4l25-21ksoftirqd/123:48:031
134491500,12ptp4l0-21swapper/119:24:251
1005299505,2cyclictest33-21ksoftirqd/220:23:472
1005299504,5cyclictest33-21ksoftirqd/200:22:532
10052995020,5cyclictest33-21ksoftirqd/223:00:252
10052995012,7cyclictest33-21ksoftirqd/223:22:182
134491490,9ptp4l0-21swapper/120:09:581
134491490,4ptp4l0-21swapper/321:48:013
134491490,4ptp4l0-21swapper/121:45:231
134491490,4ptp4l0-21swapper/022:21:150
134491490,16ptp4l25-21ksoftirqd/122:14:581
134491490,16ptp4l25-21ksoftirqd/122:14:581
1005299496,2cyclictest33-21ksoftirqd/223:38:232
1005299494,3cyclictest33-21ksoftirqd/220:00:282
10052994939,3cyclictest33-21ksoftirqd/219:55:222
134491480,4ptp4l0-21swapper/221:39:112
134491480,4ptp4l0-21swapper/020:18:560
134491480,3ptp4l0-21swapper/000:23:110
134491480,10ptp4l8284-21iostat19:05:193
134491480,10ptp4l0-21swapper/123:06:541
10052994838,3cyclictest33-21ksoftirqd/220:36:432
10052994837,4cyclictest33-21ksoftirqd/220:58:572
10052994831,4cyclictest33-21ksoftirqd/222:10:002
10052994817,7cyclictest33-21ksoftirqd/221:25:282
134491470,4ptp4l1005399cyclictest20:10:203
134491470,4ptp4l0-21swapper/323:41:173
134491470,4ptp4l0-21swapper/123:00:171
134491470,4ptp4l0-21swapper/119:10:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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