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2026-03-20 - 15:06
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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 rackdslot4.osadl.org (updated Fri Mar 20, 2026 00:45:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
212752207173,22sleep10-21swapper/119:05:561
138591204170,23phc2sys0-21swapper/319:07:293
212472200166,22sleep00-21swapper/019:05:340
212442200167,22sleep20-21swapper/219:05:312
1385918262,11phc2sys0-21swapper/319:10:003
2159628162,10sleep00-21swapper/019:10:000
56622600,3sleep00-21swapper/021:50:180
2189099571,23cyclictest32473-21if_enp4s019:30:153
21889995415,37cyclictest0-21swapper/223:35:242
138491540,1ptp4l391rcuc/321:28:003
297212520,1sleep00-21swapper/022:40:120
2189099523,27cyclictest0-21swapper/322:24:393
299502510,1sleep10-21swapper/119:25:161
2189099510,25cyclictest27594-21sed20:25:193
50798500,15rtkit-daemon22036-21chrt23:29:390
2189099480,29cyclictest22976-21missed_timers20:15:213
138491450,0ptp4l401ktimersoftd/322:59:503
21890994438,4cyclictest4084-21cron20:45:013
2189099421,23cyclictest17059-21ls21:10:143
138491420,0ptp4l401ktimersoftd/323:46:463
21890994135,4cyclictest11449-21cron21:00:003
21889994123,3cyclictest33-21ksoftirqd/221:45:102
138491410,1ptp4l1303-21runrttasks23:34:563
138491410,0ptp4l401ktimersoftd/323:18:033
21889994035,3cyclictest33-21ksoftirqd/220:10:002
2188899401,37cyclictest0-21swapper/122:42:231
138491400,0ptp4l401ktimersoftd/323:24:463
21890993914,21cyclictest10026-21sed22:00:133
2189099391,34cyclictest22001-21apt-get21:20:123
21889993933,4cyclictest33-21ksoftirqd/221:22:032
2188899390,37cyclictest0-21swapper/122:21:331
21890993813,22cyclictest15541-21ls00:20:133
21888993810,27cyclictest0-21swapper/121:06:131
21890993731,4cyclictest41-21ksoftirqd/319:44:163
21890993715,19cyclictest2800-21expr23:55:143
21890993715,19cyclictest27253-21expr21:30:133
21889993731,4cyclictest33-21ksoftirqd/219:22:192
21889993728,5cyclictest33-21ksoftirqd/221:35:112
21889993712,23cyclictest0-21swapper/220:24:542
2188999370,16cyclictest0-21swapper/221:06:242
21888993732,3cyclictest25-21ksoftirqd/122:50:101
21888993731,4cyclictest25-21ksoftirqd/123:36:221
21888993731,4cyclictest25-21ksoftirqd/123:30:121
21887993731,4cyclictest9-21ksoftirqd/022:13:360
21890993630,4cyclictest41-21ksoftirqd/322:07:583
21890993630,4cyclictest41-21ksoftirqd/320:49:113
21890993630,4cyclictest41-21ksoftirqd/319:55:433
21890993630,4cyclictest41-21ksoftirqd/300:08:253
21890993630,4cyclictest41-21ksoftirqd/300:08:253
21890993613,20cyclictest30252-21ls21:35:163
2189099360,34cyclictest0-21swapper/300:40:003
2189099360,18cyclictest0-21swapper/323:35:203
21889993631,3cyclictest33-21ksoftirqd/220:19:252
21889993630,4cyclictest33-21ksoftirqd/222:02:032
21889993630,4cyclictest33-21ksoftirqd/221:57:382
21889993630,4cyclictest33-21ksoftirqd/221:16:262
21889993630,4cyclictest33-21ksoftirqd/219:31:512
21889993630,4cyclictest33-21ksoftirqd/219:10:502
21889993629,5cyclictest33-21ksoftirqd/219:35:362
2188999360,34cyclictest0-21swapper/222:40:242
2188999360,2cyclictest0-21swapper/200:38:442
21888993630,4cyclictest25-21ksoftirqd/123:50:351
21888993630,4cyclictest25-21ksoftirqd/122:45:351
21888993630,4cyclictest25-21ksoftirqd/121:27:361
21888993630,4cyclictest25-21ksoftirqd/120:27:021
21888993630,4cyclictest25-21ksoftirqd/119:37:171
21888993630,4cyclictest25-21ksoftirqd/119:32:551
21888993629,5cyclictest25-21ksoftirqd/123:48:451
21887993630,4cyclictest9-21ksoftirqd/021:58:200
21887993630,3cyclictest19604-21cron23:25:010
21890993529,4cyclictest41-21ksoftirqd/323:05:293
21890993529,4cyclictest41-21ksoftirqd/321:45:363
21890993528,4cyclictest41-21ksoftirqd/322:27:123
21890993513,19cyclictest19284-21/usr/sbin/munin21:15:223
2189099350,32cyclictest26770-1kworker/3:2H22:50:013
21889993530,3cyclictest33-21ksoftirqd/200:17:592
21889993529,4cyclictest33-21ksoftirqd/223:31:132
21889993529,4cyclictest33-21ksoftirqd/223:17:442
21889993529,4cyclictest33-21ksoftirqd/222:45:452
21889993528,5cyclictest33-21ksoftirqd/220:46:292
21888993530,3cyclictest25-21ksoftirqd/122:30:111
21888993530,3cyclictest25-21ksoftirqd/120:54:451
21888993529,4cyclictest25-21ksoftirqd/123:08:051
21888993529,4cyclictest25-21ksoftirqd/123:02:461
21888993529,4cyclictest25-21ksoftirqd/121:23:121
21888993529,4cyclictest25-21ksoftirqd/119:55:371
21888993529,4cyclictest25-21ksoftirqd/119:53:361
21888993529,4cyclictest25-21ksoftirqd/119:43:431
21888993529,4cyclictest25-21ksoftirqd/100:11:321
21887993530,3cyclictest4471-21cron21:49:590
21887993529,4cyclictest9-21ksoftirqd/019:52:560
21887993528,4cyclictest9-21ksoftirqd/000:00:240
2189099349,22cyclictest10653-21processes19:50:213
21890993428,4cyclictest41-21ksoftirqd/321:59:473
21890993417,15cyclictest41-21ksoftirqd/323:28:583
21890993413,18cyclictest7319-21/usr/sbin/munin23:00:223
21889993429,3cyclictest33-21ksoftirqd/222:14:112
21889993429,3cyclictest33-21ksoftirqd/220:35:132
21889993428,4cyclictest33-21ksoftirqd/223:48:462
21889993428,4cyclictest33-21ksoftirqd/222:33:242
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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