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2025-09-10 - 08:16
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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
Characteristics of the 20 highest latencies:
System rackeslot2.osadl.org (updated Wed Sep 10, 2025 00:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
192002521990,2sleep30-21swapper/322:04:413
209229221520,2sleep1127412-1atop23:40:021
20215832770,2sleep30-21swapper/323:00:003
18877202330,1sleep00-21swapper/021:44:460
1679732993020,6cyclictest1666-21polkitd21:15:010
18939172290,2sleep20-21swapper/221:49:412
1679734992421,1cyclictest0-21swapper/200:05:012
1679732992421,2cyclictest2021541-21cat23:00:000
17923482230,1sleep20-21swapper/220:44:372
1679733992219,2cyclictest1845971-21/usr/sbin/munin21:20:021
167973299220,15cyclictest1686305-21uname19:15:010
797898210,4rtkit-daemon1685807-21munin-node19:20:271
1679734992118,1cyclictest0-21swapper/219:15:012
1679733992119,1cyclictest1837015-21munin-plugin-st21:15:011
1679733992112,4cyclictest0-21swapper/123:30:021
167973299217,4cyclictest1977829-21kworker/u16:2-rpciod23:42:220
1679732992118,2cyclictest2030434-21gpgconf23:05:000
1679732992118,2cyclictest1810056-21latency_hist20:55:010
1679732992118,2cyclictest1803874-21/usr/sbin/munin20:50:020
1679732992118,2cyclictest1731053-21systemd19:50:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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