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2025-11-26 - 03:30
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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 Wed Nov 26, 2025 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27780672239178,20sleep70-21swapper/719:07:137
27782462228170,19sleep30-21swapper/319:09:423
27759802225168,18sleep50-21swapper/519:05:025
27782132221188,21sleep00-21swapper/019:09:150
27780482220186,21sleep60-21swapper/619:06:566
27782082216189,17sleep40-21swapper/419:09:114
27760242214186,18sleep20-21swapper/219:05:402
27782542206174,20sleep10-21swapper/119:09:481
277845499340,2cyclictest782-21dbus-daemon20:45:011
277845499340,1cyclictest2876816-21turbostat.cron22:10:001
2778470993126,4cyclictest430086-21in:imuxsock20:45:017
277845999310,30cyclictest28096842chrt20:05:553
277845699310,30cyclictest2895946-21cron22:45:002
277845499310,28cyclictest0-21swapper/119:25:011
277845499310,28cyclictest0-21swapper/119:25:011
2778453993127,3cyclictest2825350-21sh20:35:000
277847099300,29cyclictest2888342-21apt-get22:30:557
277847099300,29cyclictest2858440-21apt-get21:35:597
2778465993027,2cyclictest3820478-21systemd-journal00:15:005
2778463993028,1cyclictest2825839-21apt-get20:35:574
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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