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2025-12-07 - 04:40
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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 Sun Dec 07, 2025 00:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17775042222188,22sleep40-21swapper/419:05:174
17795772221169,17sleep10-21swapper/119:07:151
17775272220190,19sleep70-21swapper/719:05:377
17795452219189,19sleep50-21swapper/519:06:475
17797112216182,19sleep00-21swapper/019:09:070
17797472213183,19sleep60-21swapper/619:09:376
17795992213179,20sleep30-21swapper/319:07:333
17795132211184,17sleep20-21swapper/219:06:202
178013099340,29cyclictest1889932-21sh22:30:000
178015099320,30cyclictest0-21swapper/519:35:005
178013799320,30cyclictest1906344-21sh23:00:002
178015599310,30cyclictest3820478-21systemd-journal21:45:006
1780150993128,2cyclictest1958318-21taskset00:35:545
1780130993127,3cyclictest1784228-21apt-get19:15:540
178013099310,29cyclictest1947060-21latency_hist00:15:000
1780160993027,2cyclictest1925959-21apt-get23:35:567
1780155993028,1cyclictest1824964-21apt-get20:30:576
178015099300,29cyclictest3820478-21systemd-journal23:05:005
1780137993028,1cyclictest1816609-21apt-get20:15:562
178013799300,2cyclictest1824964-21apt-get20:30:572
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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