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2025-12-15 - 23:52
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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 rack8slot4.osadl.org (updated Mon Dec 15, 2025 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18952782239181,19sleep60-21swapper/607:05:126
18955342224167,19sleep70-21swapper/707:08:497
18956052221188,21sleep30-21swapper/307:09:503
18952852219164,17sleep20-21swapper/207:05:152
18954312217186,20sleep00-21swapper/007:07:230
18953242217188,19sleep50-21swapper/507:05:515
18953942216162,18sleep10-21swapper/107:06:511
18955042215187,18sleep40-21swapper/407:08:224
189584699502,24cyclictest0-21swapper/207:59:582
1895861993327,5cyclictest1-21systemd08:35:017
189585599320,31cyclictest0-21swapper/512:18:175
189585599320,31cyclictest0-21swapper/510:00:025
189585299323,29cyclictest581rcuc/408:00:014
189585099320,3cyclictest1961863-21dump-pmu-power09:10:013
189585099320,3cyclictest1961863-21dump-pmu-power09:10:013
189584699321,30cyclictest369-21systemd-journal07:20:012
1895861993127,3cyclictest0-21swapper/708:58:157
1895859993127,3cyclictest2054203-21sh12:00:006
189585099310,29cyclictest1973539-21apt-get09:33:153
189584699310,30cyclictest1942998-21sh08:35:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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