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2025-10-19 - 20:27
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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 50 highest latencies:
System rackeslot8.osadl.org (updated Sun Oct 19, 2025 12:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
205221321190,1sleep20-21swapper/210:10:002
18322632350,3sleep01780341-21kworker/0:2+events07:30:140
1805139992926,2cyclictest1942933-21cron09:00:012
1805135992522,2cyclictest1899956-21ls08:25:001
1805133992514,1cyclictest191rcu_preempt10:35:210
19634302240,5chrt1825403-21kworker/u8:2+xprtiod09:15:002
1805133992420,3cyclictest2068160-21idleruntime-cro10:20:010
1805133992420,2cyclictest500-21avahi-daemon09:45:010
1805139992320,2cyclictest2011866-21munin-run09:45:012
180513599230,3cyclictest2156786-21apt11:15:001
1805144992219,1cyclictest0-21swapper/311:45:003
1805144992219,1cyclictest0-21swapper/307:25:013
1805135992219,2cyclictest2027165-21kworker/u8:0-rpciod10:30:011
1805135992219,2cyclictest1987619-21dump-pmu-power09:30:001
1805133992219,2cyclictest761-21cups-browsed11:25:010
1805144992118,1cyclictest0-21swapper/311:25:003
1805144992118,1cyclictest0-21swapper/308:40:013
1805144992118,1cyclictest0-21swapper/307:35:013
1805139992118,2cyclictest1971728-21latency_hist09:20:012
1805135992117,2cyclictest0-21swapper/109:20:001
1805133992114,2cyclictest191rcu_preempt10:30:230
1805144992017,1cyclictest0-21swapper/311:04:413
1805144992016,1cyclictest0-21swapper/312:05:003
1805135992017,2cyclictest3004-21cron07:25:011
1805135992017,2cyclictest0-21swapper/111:45:011
180513399209,6cyclictest0-21swapper/011:55:250
1805133992017,2cyclictest501-21dbus-daemon09:15:010
1805133992016,3cyclictest1906085-21cron08:30:000
180513399200,7cyclictest0-21swapper/008:40:120
180513399200,7cyclictest0-21swapper/008:40:110
1805144991916,1cyclictest0-21swapper/309:20:013
1805144991916,1cyclictest0-21swapper/309:05:003
1805139991916,2cyclictest2092362-21turbostat.cron10:35:002
1805139991916,2cyclictest0-21swapper/210:15:002
1805139991915,3cyclictest1948627-21unixbench-2d09:00:282
1805139991915,2cyclictest0-21swapper/210:40:012
180513599194,2cyclictest191rcu_preempt09:40:011
1805135991916,2cyclictest2213771-21sh11:49:591
1805135991916,2cyclictest1881284-21systemd-run08:10:011
180513399199,6cyclictest1955254-21diskmemload10:55:170
180513399194,5cyclictest16-21ksoftirqd/012:02:410
180513399192,4cyclictest16-21ksoftirqd/008:55:000
1805133991916,2cyclictest2164601-21latency_hist11:20:010
1805133991916,2cyclictest1862754-21turbostat07:54:590
1805133991915,2cyclictest0-21swapper/011:45:010
1805133991913,2cyclictest191rcu_preempt10:25:180
1805133991912,1cyclictest191rcu_preempt11:34:580
1805133991912,1cyclictest191rcu_preempt10:00:150
180513399190,7cyclictest16-21ksoftirqd/011:35:170
1805144991815,1cyclictest0-21swapper/310:05:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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