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2026-03-28 - 16:31
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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 20 highest latencies:
System rack3slot6.osadl.org (updated Sat Mar 28, 2026 12:44:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2739028139,30sleep10-21swapper/107:05:371
2776527719,49sleep00-21swapper/007:09:060
27983997553,15cyclictest4883-21apt-get07:35:120
270532700,4chrt151rcu_preempt10:05:341
2798399686,21cyclictest12136-21apt-get10:55:150
27983996843,16cyclictest26108-21apt-get10:05:100
27983996616,16cyclictest30163-21sort07:15:070
2798399655,50cyclictest13842-21apt-get09:30:120
27987996429,9cyclictest26-21ksoftirqd/107:37:281
27983996439,17cyclictest2765-21apt-get10:30:130
2798399634,20cyclictest6623-21apt-get10:40:140
27987996239,8cyclictest26-21ksoftirqd/111:55:181
27983996237,19cyclictest14-21ksoftirqd/010:40:000
27983996221,37cyclictest14-21ksoftirqd/007:49:450
27983996219,14cyclictest14-21ksoftirqd/009:38:130
27987996137,9cyclictest26-21ksoftirqd/110:10:221
27987996128,24cyclictest4508-21apt-get10:35:131
2798399616,16cyclictest0-21swapper/011:45:130
27983996125,30cyclictest19132-21/usr/sbin/munin09:45:260
27987996042,11cyclictest26-21ksoftirqd/112:15:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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