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2025-12-03 - 18:14
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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 rackeslot5.osadl.org (updated Wed Dec 03, 2025 00:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2680599376,17cyclictest151rcu_preempt20:07:003
2680499310,2cyclictest303-21systemd-journal00:10:012
2680599301,1cyclictest9741-21basename23:10:003
2680599300,29cyclictest31439-21sendmail-msp19:20:013
26802993028,1cyclictest14758-21cron23:20:010
2680299300,29cyclictest5378-21apt-get23:00:140
2680299300,29cyclictest18010-21chrt20:00:130
2680599290,28cyclictest22979-21munin-run21:20:003
2680499290,28cyclictest6306-21munin-run20:45:002
2680499290,28cyclictest2734-21cron22:55:002
2680399290,28cyclictest609-21dbus-daemon20:30:011
2680399290,1cyclictest9768-21munin-run23:10:011
26802992928,0cyclictest4239-21apt-get20:40:120
26802992927,1cyclictest11895-21munin-run22:05:010
2680299290,28cyclictest24370-21apt-get23:40:130
26805992826,1cyclictest29098-21cron19:15:013
2680599280,28cyclictest0-21swapper/323:15:013
2680599280,28cyclictest0-21swapper/323:00:143
2680599280,27cyclictest0-21swapper/322:05:103
2680599280,27cyclictest0-21swapper/321:05:133
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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