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2026-04-21 - 03:07
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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 rackcslot4.osadl.org (updated Tue Apr 21, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29612462264186,29sleep00-21swapper/019:09:190
29611722249183,51sleep10-21swapper/119:08:311
30140572730,3sleep13014060-21grep21:15:221
29635622700,5sleep02963559-21apt-config19:15:020
31470212590,4sleep03147019-21seq00:25:110
30520302510,4sleep00-21swapper/022:08:210
31156972450,2sleep00-21swapper/023:36:410
30164462450,2sleep00-21swapper/021:19:270
29959792450,3sleep10-21swapper/120:35:151
179699440,11rtkit-daemon0-21swapper/100:39:271
179699410,3rtkit-daemon0-21swapper/021:31:330
2961429993935,2cyclictest0-21swapper/122:25:221
179699390,5rtkit-daemon2985811-21cron20:10:001
179699390,5rtkit-daemon2985811-21cron20:09:591
31390872380,4sleep10-21swapper/100:10:171
179699380,3rtkit-daemon0-21swapper/022:33:111
31349702310,2sleep10-21swapper/100:04:171
30889482310,3sleep03088951-21fschecks_time23:00:180
179699310,4rtkit-daemon1795-21rtkit-daemon21:47:080
30528192290,5sleep13052772-21python322:10:011
30879892280,2sleep13087996-21ssh22:59:191
2961429992810,11cyclictest3053395-21apt-get22:10:151
296142999276,2cyclictest141rcu_preempt23:56:201
296142999271,5cyclictest3009298-21diskmemload23:40:061
296142699272,20cyclictest2993846-21/usr/sbin/munin20:30:300
296142699270,4cyclictest3099483-21cut23:15:010
296142999266,18cyclictest3099418-21apt-key23:15:011
2961429992622,2cyclictest3106266-21ssh23:24:241
296142999261,6cyclictest2965022-21irqstats19:15:181
2961429992612,8cyclictest3054809-1kworker/u9:123:45:121
296142999261,22cyclictest3092428-40apt-check23:05:191
2961426992613,7cyclictest66950irq/132-enp2s023:25:140
2961426992612,9cyclictest3015388-1kworker/u9:121:20:130
179699260,5rtkit-daemon3149952-21cron00:30:001
296142999259,9cyclictest3071052-21apt-get22:35:161
296142999255,2cyclictest141rcu_preempt22:45:191
296142999251,4cyclictest3035712-21ssh21:45:231
2961429992510,9cyclictest2986019-21apt-get20:10:141
2961429992510,13cyclictest26-21ksoftirqd/122:20:111
296142999250,5cyclictest3103179-21dump-pmu-power23:20:001
296142999250,23cyclictest2994178-21fschecks_time20:30:191
296142699253,16cyclictest3027881-21apt-get21:35:130
296142699252,4cyclictest141rcu_preempt21:55:000
296142699251,4cyclictest3041465-21apt-get21:55:030
2961426992510,10cyclictest2970385-21apt-get19:30:120
179699250,4rtkit-daemon0-21swapper/020:29:190
296142999244,16cyclictest0-21swapper/123:00:211
296142999241,21cyclictest3114194-21fschecks_time23:35:171
296142999240,7cyclictest3041610-21apt-config21:55:011
296142699246,3cyclictest141rcu_preempt23:15:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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