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2026-04-05 - 13:46
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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 Apr 05, 2026 12:45:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
120572950,4chrt36-21kcompactd009:00:211
182942940,5sleep10-21swapper/112:20:211
426899917,74cyclictest8235-21apt-get08:50:140
4268999113,71cyclictest0-21swapper/009:05:250
4268998528,51cyclictest243-21systemd-journal12:14:140
406728427,46sleep10-21swapper/107:09:221
426899832,75cyclictest31691-21taskset08:24:500
4274998251,17cyclictest16755-21apt-get10:45:131
426899827,68cyclictest25822-21apt-get11:10:230
426899816,40cyclictest0-21swapper/007:40:160
4268998114,55cyclictest0-21swapper/010:30:140
4268998113,58cyclictest0-21swapper/010:45:130
426899807,65cyclictest4759-21apt-get08:40:130
426899805,66cyclictest9149-21apt-get11:55:120
426899805,65cyclictest2943-21apt-get08:35:150
426899805,65cyclictest2943-21apt-get08:35:150
4268998024,48cyclictest7416-21apt-get11:50:130
4274997950,14cyclictest19369-21apt-get09:20:121
426899797,62cyclictest6214-21apt-get10:15:120
4268997915,51cyclictest0-21swapper/010:00:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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