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2026-05-17 - 16:06
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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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack3slot6.osadl.org (updated Sun May 17, 2026 12:44:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31444991007,84cyclictest6602-21apt-get07:30:110
2998829828,59sleep10-21swapper/107:05:191
44932940,5chrt4494-21/usr/sbin/munin11:55:311
31444999236,42cyclictest19009-21chrt08:05:130
3144499916,74cyclictest27771-21apt-get08:30:130
2969528933,40sleep00-21swapper/007:05:080
3144499877,68cyclictest31325-21apt-get08:40:120
31444998714,64cyclictest0-21swapper/010:55:140
31444998714,58cyclictest0-21swapper/010:10:150
3144499863,19cyclictest11408-21grep07:40:380
31444998631,41cyclictest14-21ksoftirqd/008:25:150
31444998629,45cyclictest14-21ksoftirqd/009:50:130
31444998615,60cyclictest0-21swapper/012:20:130
31444998614,58cyclictest0-21swapper/011:35:110
31444998614,57cyclictest0-21swapper/008:20:120
3144499856,69cyclictest9519-21apt-get10:40:140
3144499856,64cyclictest11452-21apt-get09:15:160
3144499856,63cyclictest20795-21apt-get08:10:150
31444998522,50cyclictest0-21swapper/008:55:120
31444998515,56cyclictest0-21swapper/011:00:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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