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2026-04-15 - 08:16
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack3slot6.osadl.org (updated Wed Apr 15, 2026 00:44:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24638999120,42cyclictest29862-21aten2.4-expect22:25:170
2315929137,40sleep122889-21/usr/sbin/munin19:05:171
24638998712,67cyclictest0-21swapper/022:15:250
2463899863,49cyclictest243-21systemd-journal23:40:000
239502840,6sleep023952-21grep19:05:290
24645998227,17cyclictest18866-21apt-get21:55:121
24645998226,19cyclictest576-21cron22:35:001
2463899826,14cyclictest22183-21cron22:05:000
24638998214,17cyclictest0-21swapper/000:25:140
24645998024,17cyclictest6393-21tail21:20:161
24645997730,19cyclictest26-21ksoftirqd/123:28:121
24638997711,30cyclictest6271-21taskset21:20:140
24638997616,18cyclictest0-21swapper/023:30:120
24638997554,13cyclictest0-21swapper/021:55:130
24645997432,16cyclictest26-21ksoftirqd/122:00:451
24645997322,18cyclictest10577-21ls00:35:001
24638997134,21cyclictest14-21ksoftirqd/023:05:280
24645997034,8cyclictest26-21ksoftirqd/123:53:381
24638997033,22cyclictest14-21ksoftirqd/021:40:270
24638996836,28cyclictest14-21ksoftirqd/022:10:130
2463899676,21cyclictest30930-21apt-get00:00:130
24645996436,10cyclictest26-21ksoftirqd/121:50:221
24645996418,10cyclictest22999-21telnet20:35:181
2463899646,19cyclictest25656-21apt-get23:45:130
24638996310,44cyclictest16581-21apt-get23:20:120
2464599625,52cyclictest0-21swapper/122:50:301
24645996223,15cyclictest26-21ksoftirqd/123:45:001
24645996215,41cyclictest0-21swapper/122:15:321
24638996238,18cyclictest14-21ksoftirqd/021:25:160
24638996234,21cyclictest14-21ksoftirqd/000:30:280
24638996233,19cyclictest14-21ksoftirqd/021:35:130
24645996136,14cyclictest26-21ksoftirqd/119:15:181
24645996023,33cyclictest0-21swapper/123:19:061
24638996037,17cyclictest14-21ksoftirqd/000:20:160
24645995936,17cyclictest26-21ksoftirqd/120:42:451
24645995935,18cyclictest26-21ksoftirqd/122:35:351
24638995933,21cyclictest14-21ksoftirqd/022:50:280
24638995931,22cyclictest14-21ksoftirqd/020:50:290
24638995931,21cyclictest14-21ksoftirqd/022:20:280
24638995931,15cyclictest0-21swapper/022:30:130
24638995918,36cyclictest2664-21aten2.4-expect22:40:170
2464599587,37cyclictest0-21swapper/119:30:551
24645995835,18cyclictest26-21ksoftirqd/119:25:121
2463899586,47cyclictest0-21swapper/021:05:130
2463899584,15cyclictest796-21munin-run21:04:590
24638995841,12cyclictest22869-21apt-get20:35:140
24638995836,18cyclictest14-21ksoftirqd/021:30:180
24638995834,18cyclictest14-21ksoftirqd/019:35:290
2464599577,37cyclictest0-21swapper/123:05:351
2464599575,30cyclictest0-21swapper/122:05:321
24645995731,20cyclictest457-21dbus-daemon20:25:001
2463899574,14cyclictest25371-21uname19:10:260
24638995734,18cyclictest14-21ksoftirqd/023:40:260
24638995734,18cyclictest14-21ksoftirqd/023:10:170
24638995731,20cyclictest14-21ksoftirqd/019:30:280
24638995720,32cyclictest27458-21telnet23:50:140
24645995641,9cyclictest26-21ksoftirqd/100:20:011
24645995631,11cyclictest2588-21latency_hist21:10:011
24645995617,17cyclictest26-21ksoftirqd/120:00:001
2463899564,16cyclictest6217-21latency_hist21:20:020
24638995634,18cyclictest14-21ksoftirqd/020:00:160
2464599559,42cyclictest0-21swapper/120:32:001
2464599558,11cyclictest0-21swapper/100:05:241
2464599557,11cyclictest0-21swapper/120:15:301
24645995533,17cyclictest26-21ksoftirqd/119:50:221
24645995515,17cyclictest31970-21unixbench_multi00:00:361
24638995527,15cyclictest0-21swapper/022:35:130
24638995526,16cyclictest0-21swapper/000:05:150
24638995517,32cyclictest14-21ksoftirqd/020:40:170
24645995438,10cyclictest0-21swapper/122:28:121
24645995431,18cyclictest26-21ksoftirqd/123:00:261
24645995429,20cyclictest6568-21seq19:49:191
24645995429,20cyclictest6568-21seq19:49:191
24645995414,14cyclictest26-21ksoftirqd/123:30:171
24645995412,17cyclictest30510-21cut20:55:271
2463899544,24cyclictest1-21systemd21:48:110
24638995430,19cyclictest14-21ksoftirqd/020:25:140
24638995427,21cyclictest14-21ksoftirqd/019:55:260
24638995425,16cyclictest0-21swapper/000:10:130
24638995420,29cyclictest243-21systemd-journal20:06:020
24638995411,38cyclictest0-21swapper/019:45:220
24638995411,38cyclictest0-21swapper/019:45:220
2464599536,42cyclictest0-21swapper/121:40:111
2464599535,9cyclictest0-21swapper/121:29:341
24645995322,11cyclictest32031-21kworker/1:219:40:221
24645995319,16cyclictest26-21ksoftirqd/100:10:531
24645995318,15cyclictest26-21ksoftirqd/123:59:421
24645995317,19cyclictest26-21ksoftirqd/100:38:331
24645995317,15cyclictest26-21ksoftirqd/100:26:571
24645995311,37cyclictest0-21swapper/120:26:011
2463899536,42cyclictest0-21swapper/021:50:430
2463899535,43cyclictest0-21swapper/000:35:340
2463899534,44cyclictest0-21swapper/022:08:270
24638995338,10cyclictest0-21swapper/019:50:120
24638995336,11cyclictest14-21ksoftirqd/022:50:000
2463899533,22cyclictest2763-21/usr/sbin/munin21:10:120
24638995324,15cyclictest0-21swapper/020:30:110
24638995315,31cyclictest0-21swapper/019:40:140
2464599526,41cyclictest0-21swapper/100:20:371
2464599525,10cyclictest0-21swapper/123:35:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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