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2026-01-02 - 10:23
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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 Fri Jan 02, 2026 00:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
336678599109101,5cyclictest3473712-21latency_hist00:40:010
33667909910898,7cyclictest3460568-40logrotate00:00:011
33667909910898,7cyclictest3460568-40logrotate00:00:001
3366790999989,7cyclictest3421850-21latency_hist22:00:011
3366785998068,10cyclictest3418918-21apt-get21:50:110
3366785997666,7cyclictest3406997-21latency_hist21:15:010
3366785997466,6cyclictest3465407-21apt-get00:11:300
3366790997265,5cyclictest3366695-21kworker/u8:1+flush-179:019:20:211
3366790997265,5cyclictest3366695-21kworker/u8:1+flush-179:019:20:211
3366790997161,7cyclictest3472093-21latency_hist00:35:011
3366790997161,7cyclictest3472093-21latency_hist00:35:001
3366790996861,5cyclictest3373053-21latency_hist19:30:001
3366785996857,9cyclictest3404081-21apt-get21:05:130
3366790996751,13cyclictest3393462-21kworker/u8:0+flush-179:021:10:261
3366790996659,5cyclictest3393462-21kworker/u8:0+flush-179:021:05:001
3366785996660,4cyclictest3410708-21apt-get21:25:130
3366785996660,4cyclictest3410708-21apt-get21:25:130
3366785996634,22cyclictest510-21rs:main0
3366785996634,22cyclictest510-21rs:main0
3366785996555,7cyclictest3451025-21latency_hist23:30:010
3366785996456,6cyclictest3452866-21apt-get23:35:130
3366785996152,6cyclictest3415478-21latency_hist21:40:010
3366790995949,8cyclictest3413627-21latency_hist21:35:001
336679099590,56cyclictest0-21swapper/123:48:591
3366785995850,6cyclictest3376264-21apt-get19:40:010
336679099571,4cyclictest0-21swapper/120:00:121
3366790995546,7cyclictest3463809-21kworker/u8:1+flush-179:000:10:001
3366790995546,7cyclictest3463809-21kworker/u8:1+flush-179:000:10:001
3366785995547,6cyclictest3351141-21kworker/u8:2+flush-179:019:25:010
3366785995547,6cyclictest3351141-21kworker/u8:2+flush-179:019:25:010
3366785995546,7cyclictest3441719-21/usr/sbin/munin23:00:240
3366791995450,2cyclictest0-21swapper/219:15:592
3366790995448,4cyclictest3351141-21kworker/u8:2+flush-179:019:50:241
336679099541,48cyclictest3389496-21apt-get20:20:121
3366785995448,4cyclictest484-21dbus-daemon00:03:590
3366785995443,8cyclictest266-21systemd-journal20:30:290
336679099532,8cyclictest3434852-21apt-get22:40:131
3366785995349,2cyclictest714-21Xorg20:20:590
3366790995227,22cyclictest3462232-21latency_hist00:05:011
336678599521,49cyclictest714-21Xorg20:29:580
336678599520,47cyclictest0-21swapper/022:40:130
3366790995146,4cyclictest3366695-21kworker/u8:1+events_unbound19:15:251
3366790995131,18cyclictest714-21Xorg20:50:591
3366785995146,4cyclictest3421821-21kworker/u8:2+flush-179:022:35:260
3366790995041,7cyclictest3463809-21kworker/u8:1+flush-179:000:10:151
336679099500,47cyclictest0-21swapper/119:40:121
3366785995044,4cyclictest3463862-21kworker/u8:2+flush-179:000:20:020
3366785995043,5cyclictest3386036-21kworker/u8:0+flush-179:020:15:000
3366785995041,7cyclictest3384461-21latency_hist20:05:010
3366790994942,5cyclictest3443069-21latency_hist23:05:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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