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2026-08-19 - 22:48
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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 Wed Aug 19, 2026 12:45:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3043721550,5sleep31734499cyclictest08:45:273
17343997513,60cyclictest0-21swapper/208:55:282
134491700,23ptp4l21975-21/usr/sbin/munin07:20:263
17344996812,54cyclictest0-21swapper/311:12:293
134491660,5ptp4l0-21swapper/107:45:281
1734499651,62cyclictest0-21swapper/309:56:493
17343996430,3cyclictest33-21ksoftirqd/209:20:182
17343996329,4cyclictest33-21ksoftirqd/210:50:002
17344996215,45cyclictest0-21swapper/311:19:293
17343995926,4cyclictest33-21ksoftirqd/207:18:002
17343995825,4cyclictest33-21ksoftirqd/210:34:592
17343995725,4cyclictest33-21ksoftirqd/212:18:032
134491570,3ptp4l0-21swapper/211:15:002
17343995623,5cyclictest33-21ksoftirqd/212:00:202
17343995623,4cyclictest33-21ksoftirqd/210:21:032
17343995620,4cyclictest33-21ksoftirqd/210:01:482
134491560,4ptp4l0-21swapper/310:35:013
134491560,3ptp4l0-21swapper/310:45:463
134491560,3ptp4l0-21swapper/007:15:340
17343995527,8cyclictest33-21ksoftirqd/211:55:192
17343995522,4cyclictest33-21ksoftirqd/211:54:582
17343995521,4cyclictest33-21ksoftirqd/207:59:452
17343995520,3cyclictest33-21ksoftirqd/210:16:522
17343995519,4cyclictest33-21ksoftirqd/210:06:582
1734199550,7cyclictest556-21cron10:10:000
134491550,5ptp4l0-21swapper/307:08:443
134491550,5ptp4l0-21swapper/307:08:443
134491550,14ptp4l0-21swapper/307:35:183
134491550,10ptp4l0-21swapper/111:08:061
17343995423,3cyclictest33-21ksoftirqd/209:26:412
17343995422,5cyclictest33-21ksoftirqd/208:30:132
17343995421,5cyclictest33-21ksoftirqd/208:10:192
17343995420,6cyclictest33-21ksoftirqd/210:40:192
1734199547,3cyclictest9-21ksoftirqd/010:30:190
1734199540,7cyclictest101ktimersoftd/012:30:270
134491540,3ptp4l0-21swapper/011:30:190
17343995324,3cyclictest33-21ksoftirqd/209:09:162
17343995320,4cyclictest33-21ksoftirqd/209:16:082
17343995319,4cyclictest33-21ksoftirqd/210:52:512
1734199530,7cyclictest101ktimersoftd/010:25:000
1734199530,5cyclictest14764-21apt-get08:15:000
134491530,5ptp4l27329-21ps08:40:183
134491530,4ptp4l0-21swapper/208:00:362
134491530,4ptp4l0-21swapper/207:46:002
134491530,4ptp4l0-21swapper/107:29:511
17343995221,6cyclictest33-21ksoftirqd/211:00:252
17343995220,4cyclictest33-21ksoftirqd/212:21:492
17343995220,4cyclictest33-21ksoftirqd/209:56:032
17343995219,5cyclictest33-21ksoftirqd/212:35:212
17343995218,6cyclictest33-21ksoftirqd/209:01:442
17343995218,4cyclictest33-21ksoftirqd/208:28:142
17343995212,1cyclictest0-21swapper/212:08:502
1734199523,6cyclictest101ktimersoftd/010:35:130
1734199522,6cyclictest0-21swapper/010:55:230
134491520,4ptp4l0-21swapper/107:52:421
17343995122,6cyclictest33-21ksoftirqd/207:25:222
17343995120,4cyclictest33-21ksoftirqd/208:40:482
17343995119,7cyclictest33-21ksoftirqd/210:29:592
17343995119,6cyclictest33-21ksoftirqd/210:10:132
17343995119,6cyclictest33-21ksoftirqd/207:30:252
17343995118,4cyclictest33-21ksoftirqd/208:24:532
17343995117,5cyclictest33-21ksoftirqd/209:12:222
1734199513,6cyclictest9-21ksoftirqd/011:00:260
1734199512,5cyclictest0-21swapper/007:30:220
1734199511,6cyclictest9-21ksoftirqd/011:10:270
1734199511,5cyclictest0-21swapper/011:05:260
1734199510,8cyclictest101ktimersoftd/010:20:000
1734199510,6cyclictest162742chrt09:25:220
134491510,4ptp4l0-21swapper/307:49:573
134491510,4ptp4l0-21swapper/110:28:391
1734399509,9cyclictest33-21ksoftirqd/207:40:342
17343995022,7cyclictest33-21ksoftirqd/207:10:232
17343995021,6cyclictest33-21ksoftirqd/208:50:182
17343995019,4cyclictest33-21ksoftirqd/211:36:582
17343995015,6cyclictest33-21ksoftirqd/210:35:182
17343995015,4cyclictest33-21ksoftirqd/211:25:152
17343995014,4cyclictest33-21ksoftirqd/207:50:352
17343995013,7cyclictest33-21ksoftirqd/207:35:242
1734199500,8cyclictest9-21ksoftirqd/009:05:280
1734199500,7cyclictest28325-21head09:50:250
1734199500,6cyclictest101ktimersoftd/010:10:180
1734199500,47cyclictest101ktimersoftd/012:15:170
134491500,5ptp4l0-21swapper/207:08:362
134491500,5ptp4l0-21swapper/207:08:362
134491500,4ptp4l0-21swapper/110:57:001
134491500,4ptp4l0-21swapper/110:22:101
134491500,4ptp4l0-21swapper/109:30:161
134491500,4ptp4l0-21swapper/109:02:581
134491500,3ptp4l0-21swapper/307:40:323
1734499492,45cyclictest0-21swapper/311:50:083
17343994919,3cyclictest33-21ksoftirqd/212:25:182
17343994918,7cyclictest33-21ksoftirqd/211:30:222
17343994918,5cyclictest33-21ksoftirqd/208:35:132
17343994918,3cyclictest33-21ksoftirqd/211:45:272
17343994917,3cyclictest33-21ksoftirqd/211:22:292
17343994916,6cyclictest33-21ksoftirqd/212:32:452
17343994916,4cyclictest33-21ksoftirqd/209:53:302
17343994915,6cyclictest33-21ksoftirqd/210:55:292
17343994915,4cyclictest33-21ksoftirqd/208:47:222
1734199494,5cyclictest9-21ksoftirqd/012:10:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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