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2026-05-17 - 15:55
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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 Sun May 17, 2026 12:45:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
260332820,4sleep20-21swapper/208:35:172
18398997034,5cyclictest9-21ksoftirqd/012:35:000
18398996424,6cyclictest9-21ksoftirqd/011:35:220
18398996324,4cyclictest9-21ksoftirqd/009:25:240
134491610,4ptp4l0-21swapper/311:23:523
18398996028,3cyclictest9-21ksoftirqd/007:30:120
18398996024,6cyclictest9-21ksoftirqd/008:20:140
134491600,5ptp4l0-21swapper/109:10:161
18398995833,7cyclictest9-21ksoftirqd/012:09:590
18398995830,6cyclictest9-21ksoftirqd/007:10:150
18398995827,4cyclictest9-21ksoftirqd/010:25:000
18398995826,8cyclictest9-21ksoftirqd/009:35:010
18398995825,5cyclictest9-21ksoftirqd/009:10:240
18398995822,4cyclictest9-21ksoftirqd/010:00:290
134491580,4ptp4l0-21swapper/311:16:093
134491580,4ptp4l0-21swapper/108:15:181
1839999571,54cyclictest21764-21kworker/1:111:30:281
1839899579,3cyclictest9-21ksoftirqd/009:00:260
18398995726,4cyclictest9-21ksoftirqd/011:15:170
18398995723,6cyclictest9-21ksoftirqd/012:15:010
18398995722,4cyclictest9-21ksoftirqd/012:35:160
18398995722,3cyclictest9-21ksoftirqd/011:30:020
18398995721,5cyclictest9-21ksoftirqd/007:50:240
134491570,4ptp4l0-21swapper/307:55:173
134491570,4ptp4l0-21swapper/012:20:270
134491570,3ptp4l0-21swapper/009:24:390
134491570,20ptp4l0-21swapper/211:52:572
18398995626,4cyclictest9-21ksoftirqd/009:20:000
18398995626,3cyclictest9-21ksoftirqd/010:45:240
18398995619,5cyclictest9-21ksoftirqd/011:30:010
134491560,8ptp4l17684-21grep07:05:280
134491560,4ptp4l25654-21apt-get09:45:123
134491560,3ptp4l0-21swapper/108:50:251
134491560,3ptp4l0-21swapper/107:35:311
134491560,3ptp4l0-21swapper/008:50:240
1839899555,5cyclictest18382-21cat08:20:000
18398995522,5cyclictest9-21ksoftirqd/009:55:000
18398995518,4cyclictest9-21ksoftirqd/012:15:170
134491550,4ptp4l0-21swapper/308:20:113
134491550,4ptp4l0-21swapper/011:59:150
134491550,4ptp4l0-21swapper/008:14:450
134491550,3ptp4l0-21swapper/109:35:001
204622540,5sleep30-21swapper/309:30:583
1839899548,3cyclictest9-21ksoftirqd/011:45:220
1839899545,4cyclictest13852-21turbostat.cron10:30:000
18398995421,5cyclictest9-21ksoftirqd/007:20:140
134491540,4ptp4l212-21systemd-journal09:55:003
134491540,4ptp4l0-21swapper/307:46:213
134491540,3ptp4l0-21swapper/310:25:253
134491540,3ptp4l0-21swapper/208:30:282
134491540,3ptp4l0-21swapper/207:21:562
134491540,16ptp4l0-21swapper/209:10:512
134491540,13ptp4l0-21swapper/208:26:422
134491540,12ptp4l0-21swapper/210:55:532
248972530,5sleep30-21swapper/309:40:283
1839899536,3cyclictest9-21ksoftirqd/009:55:220
1839899535,4cyclictest23088-21cron09:40:010
18398995328,3cyclictest9-21ksoftirqd/010:40:270
18398995311,2cyclictest3074-21cpuspeed_turbos12:25:140
134491530,4ptp4l0-21swapper/312:34:083
134491530,4ptp4l0-21swapper/311:09:533
134491530,3ptp4l0-21swapper/211:45:322
134491530,3ptp4l0-21swapper/107:11:141
1839899528,3cyclictest21052-21cut08:25:140
1839899527,3cyclictest9-21ksoftirqd/008:35:260
1839899522,5cyclictest25272-21cat08:35:000
18398995218,5cyclictest9-21ksoftirqd/009:05:250
1839899521,7cyclictest9-21ksoftirqd/011:40:190
134491520,4ptp4l2768-21cstates10:05:130
134491520,4ptp4l0-21swapper/311:02:143
134491520,16ptp4l0-21swapper/208:46:142
1839899515,4cyclictest25480-21grep09:45:010
18398995124,5cyclictest9-21ksoftirqd/007:45:160
134491510,9ptp4l16065-21apt-get07:05:132
134491510,7ptp4l0-21swapper/209:41:532
1839899505,5cyclictest0-21swapper/011:05:250
1839899503,3cyclictest0-21swapper/010:50:220
1839899502,3cyclictest0-21swapper/010:30:170
18398995023,5cyclictest9-21ksoftirqd/011:00:210
1839899501,6cyclictest9-21ksoftirqd/010:15:240
18398995010,7cyclictest9-21ksoftirqd/011:20:170
134491500,5ptp4l0-21swapper/107:06:231
134491500,4ptp4l0-21swapper/309:06:343
134491500,4ptp4l0-21swapper/308:58:573
134491500,4ptp4l0-21swapper/207:14:002
134491500,3ptp4l0-21swapper/210:02:362
134491500,10ptp4l5193-21hddtemp_smartct07:50:153
121122500,5sleep20-21swapper/211:35:012
1839899498,6cyclictest9-21ksoftirqd/007:35:120
1839899497,3cyclictest9-21ksoftirqd/008:55:270
1839899495,7cyclictest9-21ksoftirqd/007:30:000
134491490,4ptp4l0-21swapper/209:47:522
134491490,4ptp4l0-21swapper/207:18:062
134491490,4ptp4l0-21swapper/111:22:451
1839899485,3cyclictest19639-21irqrtprio11:50:180
134491480,9ptp4l0-21swapper/211:30:562
134491480,9ptp4l0-21swapper/210:52:132
134491480,4ptp4l0-21swapper/109:00:351
134491480,3ptp4l0-21swapper/111:14:441
134491480,3ptp4l0-21swapper/107:47:431
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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