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2025-07-01 - 04:08
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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 50 highest latencies:
System rackdslot1.osadl.org (updated Mon Jun 30, 2025 12:45:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
184552620,3sleep018459-21timerandwakeup07:25:270
2847191610,3ptp4l0-21swapper/308:05:253
2847191600,3ptp4l0-21swapper/008:40:210
10004996029,3cyclictest33-21ksoftirqd/207:40:002
285882590,4sleep20-21swapper/207:50:172
2847191590,4ptp4l0-21swapper/307:27:373
2847191590,17ptp4l0-21swapper/107:41:411
2847191580,4ptp4l0-21swapper/011:35:240
2847191580,4ptp4l0-21swapper/011:35:240
2847191580,3ptp4l0-21swapper/211:20:222
2847191580,3ptp4l0-21swapper/209:35:022
2847191570,3ptp4l19960-21ls09:50:011
2847191570,3ptp4l0-21swapper/011:25:220
2847191560,4ptp4l0-21swapper/109:59:271
2847191560,4ptp4l0-21swapper/108:50:171
2847191560,3ptp4l0-21swapper/311:45:173
10004995625,5cyclictest33-21ksoftirqd/211:46:112
2847191550,3ptp4l0-21swapper/007:32:350
177172550,4sleep20-21swapper/208:35:192
10004995530,7cyclictest33-21ksoftirqd/207:15:232
10004995524,5cyclictest33-21ksoftirqd/207:55:272
10004995518,7cyclictest33-21ksoftirqd/209:20:302
2847191540,5ptp4l0-21swapper/012:15:200
2847191540,5ptp4l0-21swapper/007:09:550
2847191540,4ptp4l0-21swapper/212:25:582
2847191540,4ptp4l0-21swapper/211:01:582
2847191540,4ptp4l0-21swapper/111:35:291
2847191540,4ptp4l0-21swapper/111:35:291
2847191540,4ptp4l0-21swapper/010:39:140
2847191540,3ptp4l0-21swapper/107:35:121
2847191540,3ptp4l0-21swapper/010:18:390
10004995425,4cyclictest33-21ksoftirqd/211:12:022
10004995425,4cyclictest33-21ksoftirqd/210:24:332
10004995424,4cyclictest33-21ksoftirqd/210:55:242
1000399541,51cyclictest0-21swapper/109:34:401
2847191530,4ptp4l0-21swapper/211:56:002
2847191530,4ptp4l0-21swapper/210:18:462
2847191530,4ptp4l0-21swapper/007:48:590
2847191530,3ptp4l0-21swapper/008:48:090
2847191530,11ptp4l0-21swapper/310:59:373
196842530,5sleep30-21swapper/312:05:333
10004995325,4cyclictest33-21ksoftirqd/211:41:472
10004995324,5cyclictest33-21ksoftirqd/210:00:392
2847191520,4ptp4l0-21swapper/310:14:363
2847191520,4ptp4l0-21swapper/308:22:213
2847191520,4ptp4l0-21swapper/212:38:372
2847191520,4ptp4l0-21swapper/212:38:372
2847191520,4ptp4l0-21swapper/211:06:342
2847191520,4ptp4l0-21swapper/210:06:212
2847191520,4ptp4l0-21swapper/209:55:162
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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