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2026-07-19 - 08:48
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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 Sun Jul 19, 2026 00:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
188151021150,1sleep00-21swapper/022:01:180
184811321090,2sleep30-21swapper/321:41:093
16621902950,3sleep30-21swapper/319:16:073
19636632700,1sleep11963662-21ssh22:57:511
18207632320,2sleep30-21swapper/321:21:133
1653531992822,2cyclictest17750irq/127-ahci[0000:00:17.0]19:20:010
1653532992616,3cyclictest1904207-21runrttasks22:17:231
1653532992515,3cyclictest1933715-21runrttasks22:37:141
18878132240,2sleep20-21swapper/222:06:132
1653532992417,2cyclictest69250irq/121-eno100:40:001
1653532992415,3cyclictest1307-21mta-sts-daemon23:36:121
1653531992314,5cyclictest1999800-21timerwakeupswit23:21:220
1157598230,3rtkit-daemon676-21mta-sts-daemon21:49:561
1653532992219,2cyclictest664-21dbus-daemon21:10:021
1653532992211,3cyclictest2043806-21grep23:51:181
1653531992220,1cyclictest0-21swapper/000:16:050
1653531992219,2cyclictest1653529-21cyclictest21:40:020
1653531992213,5cyclictest2091677-21irqrtprio00:26:120
1653531992213,3cyclictest1984875-21/usr/sbin/munin23:11:170
1653531992213,2cyclictest684-21systemd-logind19:10:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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