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2026-04-21 - 22:08
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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 rackdslot4.osadl.org (updated Tue Apr 21, 2026 12:46:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
211542231164,23sleep30-21swapper/307:09:133
211542231164,23sleep30-21swapper/307:09:123
209962203170,22sleep10-21swapper/107:07:111
209962203170,22sleep10-21swapper/107:07:101
211042201167,22sleep00-21swapper/007:08:330
211042201167,22sleep00-21swapper/007:08:330
210542200166,23sleep20-21swapper/207:07:552
210542200166,23sleep20-21swapper/207:07:552
1845021390,6sleep32151799cyclictest09:10:283
50798940,76rtkit-daemon0-21swapper/007:10:000
2151599670,23cyclictest7232-21sed08:50:141
2151599660,23cyclictest26411-21sed09:30:001
2151599640,22cyclictest5485-21tr10:55:261
138491600,1ptp4l401ktimersoftd/311:44:013
138491590,1ptp4l401ktimersoftd/311:45:203
2151599571,23cyclictest15609-21mailstats10:10:231
2151599571,23cyclictest15609-21mailstats10:10:231
138491560,1ptp4l401ktimersoftd/310:48:003
320372550,2sleep10-21swapper/111:50:201
320372550,2sleep10-21swapper/111:50:201
176012550,3sleep20-21swapper/212:25:232
21515995412,21cyclictest1479-21apt10:50:121
272242510,3sleep02151499cyclictest08:25:150
21515995145,3cyclictest18893-21sh09:15:001
21517994641,3cyclictest223-21systemd-journal09:20:003
2151499467,36cyclictest31608-21cpu07:30:120
50798450,10rtkit-daemon0-21swapper/010:52:160
138491440,1ptp4l26479-21apt-get07:20:113
138491430,0ptp4l401ktimersoftd/311:29:573
21516994120,3cyclictest33-21ksoftirqd/208:46:072
2151599390,17cyclictest26221-21egrep11:40:121
21514993933,3cyclictest29140-21/usr/sbin/munin07:25:110
21517993833,3cyclictest21654-21cron08:15:003
21516993832,4cyclictest33-21ksoftirqd/211:27:542
21515993833,3cyclictest31125-21cron10:45:001
50798370,2rtkit-daemon0-21swapper/009:26:540
21517993732,3cyclictest41-21ksoftirqd/309:35:003
21517993731,4cyclictest41-21ksoftirqd/312:11:083
21517993731,4cyclictest41-21ksoftirqd/311:13:103
21517993731,4cyclictest41-21ksoftirqd/310:18:353
21517993731,4cyclictest41-21ksoftirqd/308:09:333
21517993731,4cyclictest41-21ksoftirqd/308:09:333
21516993731,4cyclictest33-21ksoftirqd/210:50:312
21516993731,4cyclictest33-21ksoftirqd/209:23:062
21515993731,4cyclictest25-21ksoftirqd/109:49:421
138491370,1ptp4l401ktimersoftd/312:28:153
50798360,3rtkit-daemon2947-21ls07:35:210
50798360,3rtkit-daemon2947-21ls07:35:210
21516993630,4cyclictest33-21ksoftirqd/211:45:112
21516993630,4cyclictest33-21ksoftirqd/210:34:352
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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