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2026-07-19 - 07:43
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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 50 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
1653531992212,5cyclictest0-21swapper/022:56:150
3240591210,1phc2sys0-21swapper/322:25:033
3240591210,1phc2sys0-21swapper/322:25:033
165353299219,7cyclictest0-21swapper/122:31:191
1653532992119,1cyclictest2097259-21dump-pmu-power00:30:001
1653532992118,2cyclictest2016278-21systemd-run23:35:021
1653532992118,2cyclictest1823794-21grep21:25:011
1653532992117,2cyclictest0-21swapper/123:15:011
1653532992111,3cyclictest1885665-21kthreadcore22:06:121
1653531992118,2cyclictest1660014-21systemd-run19:15:020
1653533992017,1cyclictest0-21swapper/222:20:012
1653532992017,2cyclictest1912607-21systemd-run22:25:021
1653532992017,2cyclictest1912607-21systemd-run22:25:021
1653532992017,2cyclictest0-21swapper/100:20:001
165353199209,7cyclictest2101193-21kthreadcore00:31:130
165353199209,6cyclictest0-21swapper/023:05:020
165353199209,6cyclictest0-21swapper/000:06:190
165353199208,6cyclictest11574-21rtkit-daemon22:09:350
165353199206,8cyclictest1793445-21kthreadcore21:01:140
165353199206,7cyclictest1817127-21head21:21:060
165353199206,6cyclictest1809094-21kworker/u16:2+xprtiod22:25:480
165353199204,5cyclictest1771725-21aten2.4-expect20:46:050
165353199204,4cyclictest2044145-21switchtime23:51:210
1653531992016,1cyclictest491rcuog/222:10:070
1653533991916,2cyclictest0-21swapper/219:15:022
1653533991916,1cyclictest0-21swapper/223:10:012
165353299197,4cyclictest0-21swapper/122:54:241
1653532991917,1cyclictest1949917-21/usr/sbin/munin22:50:021
1653532991916,2cyclictest1871961-21kthreadcore21:56:151
1653532991916,1cyclictest0-21swapper/100:10:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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