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2026-01-07 - 22:31
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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
Characteristics of the 20 highest latencies:
System rackcslot6.osadl.org (updated Wed Jan 07, 2026 12:46:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
193928499386385,1cyclictest1936100-21kworker/7:107:10:017
1939270993810,380cyclictest0-21swapper/511:30:025
1939270993810,380cyclictest0-21swapper/511:10:015
1939270993810,380cyclictest0-21swapper/508:34:025
193927099380379,1cyclictest2069408-21kworker/5:111:04:025
193927099380379,1cyclictest1961123-21kworker/5:108:12:015
193927099380378,1cyclictest1961123-21kworker/5:107:47:015
1939270993800,1cyclictest0-21swapper/508:20:015
193927099379378,1cyclictest2069408-21kworker/5:111:53:015
193927099379378,1cyclictest2069408-21kworker/5:111:46:015
193927099379378,1cyclictest1961123-21kworker/5:108:27:025
193927099379378,1cyclictest1904172-21kworker/5:007:44:015
193927099379378,1cyclictest0-21swapper/508:04:015
193927099379377,1cyclictest1961123-21kworker/5:108:16:015
193927099379377,1cyclictest1961123-21kworker/5:107:57:015
193927099378377,1cyclictest2069408-21kworker/5:111:09:025
193927099378377,1cyclictest2036328-21kworker/5:010:12:015
193927099378377,1cyclictest1961123-21kworker/5:108:51:025
193927099378377,1cyclictest0-21swapper/512:11:025
193927099378377,1cyclictest0-21swapper/511:26:025
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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