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2025-12-30 - 13:21
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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 rackeslot6.osadl.org (updated Tue Dec 30, 2025 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
332335499114104,7cyclictest3417140-40logrotate00:00:010
33233549910698,5cyclictest3391154-21latency_hist22:40:010
3323358999283,7cyclictest3410778-21latency_hist23:40:021
3323354998679,5cyclictest3413947-21kworker/u8:1+events_unbound23:50:000
3323358998478,5cyclictest3378387-21kworker/u8:1+flush-179:022:10:001
3323358998377,5cyclictest3321764-21kworker/u8:2+flush-179:019:40:001
3323358998175,5cyclictest3381030-21kworker/u8:2+flush-179:022:35:001
3323358997869,7cyclictest3347910-21latency_hist20:25:011
3323354997870,6cyclictest3334928-21apt-get19:45:000
3323358997671,3cyclictest3321764-21kworker/u8:2+events_unbound19:50:011
3323354997667,6cyclictest3376824-21latency_hist21:55:010
3323358997568,5cyclictest3321696-21kworker/u8:1+flush-179:019:20:001
3323358997469,3cyclictest3415534-21kworker/u8:2+events_unbound23:55:211
3323358997465,6cyclictest3362218-21kworker/u8:3+flush-179:021:50:211
3323354997462,10cyclictest266-21systemd-journal21:25:000
3323358997369,3cyclictest3381030-21kworker/u8:2+flush-179:022:10:261
3323358997263,7cyclictest3338581-21/usr/sbin/munin19:55:231
3323354997263,7cyclictest3383431-21/usr/sbin/munin22:15:220
3323354997262,8cyclictest3422216-21/usr/sbin/munin00:15:260
3323358997164,5cyclictest3372879-21kworker/u8:2+flush-179:021:45:001
3323358997162,7cyclictest3398829-21kworker/u8:0+flush-179:000:20:001
3323358997061,6cyclictest3370197-21latency_hist21:35:011
3323358996863,4cyclictest3351061-21kworker/u8:2+flush-179:020:50:241
3323358996863,4cyclictest3349474-21kworker/u8:0+flush-179:020:30:221
3323358996862,5cyclictest3381030-21kworker/u8:2+flush-179:022:39:551
3323358996860,6cyclictest3406000-21kworker/u8:1+flush-179:023:25:191
3323354996862,4cyclictest3396763-21kworker/u8:1+events_unbound23:00:010
3323354996862,4cyclictest3321764-21kworker/u8:2+flush-179:019:10:230
3323354996763,3cyclictest1-21systemd00:25:000
3323354996757,8cyclictest3351323-21/usr/sbin/munin20:35:240
3323358996659,5cyclictest3341785-21kworker/u8:1+flush-179:020:15:161
3323358996560,4cyclictest3413947-21kworker/u8:1+events_unbound00:00:251
3323358996556,7cyclictest3343363-21/usr/sbin/munin20:10:241
3323354996559,5cyclictest3383171-21kworker/u8:0+events_unbound22:30:000
3323354996555,7cyclictest3399383-21latency_hist23:05:010
3323358996460,2cyclictest714-21Xorg22:21:591
3323358996459,4cyclictest3398829-21kworker/u8:0+events_unbound23:25:001
3323354996455,7cyclictest3325066-21/usr/sbin/munin19:15:250
3323354996455,6cyclictest3383191-21latency_hist22:15:010
3323358996358,3cyclictest3420422-21kworker/u8:2+flush-179:000:25:211
3323358996256,5cyclictest3341785-21kworker/u8:1+flush-179:021:00:001
3323358996255,5cyclictest3398829-21kworker/u8:0+events_unbound00:40:001
3323358996249,4cyclictest3351061-21kworker/u8:2+events_unbound20:45:011
3323354996256,4cyclictest3336247-21kworker/u8:1+flush-179:019:55:220
3323358996156,4cyclictest3398829-21kworker/u8:0+flush-179:023:30:251
3323358996154,6cyclictest3351061-21kworker/u8:2+flush-179:021:05:001
3323358996153,6cyclictest3395927-21latency_hist22:55:011
3323354996156,3cyclictest3415534-21kworker/u8:2+flush-179:023:55:010
3323358996055,4cyclictest3375493-21kworker/u8:0+flush-179:021:59:561
3323358996055,4cyclictest3375493-21kworker/u8:0+flush-179:021:59:561
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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