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2026-04-10 - 04:06
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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 Apr 10, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4057601999277,12cyclictest266-21systemd-journal20:50:010
4057602999178,10cyclictest4150894-40mandb00:00:011
4057601999078,10cyclictest4150894-40mandb00:00:010
4057602998879,6cyclictest4146078-21kworker/u8:0+flush-179:023:45:221
4057602998478,3cyclictest4077411-21kworker/u8:0+flush-179:020:25:011
4057601998475,7cyclictest4062509-21/usr/sbin/munin19:25:220
4057607998174,5cyclictest4067050-21turbostat19:40:003
4057602998074,4cyclictest4107427-21kworker/u8:2+flush-179:022:15:261
4057601998067,10cyclictest266-21systemd-journal20:15:010
4057602997466,6cyclictest4157256-21kworker/u8:0+flush-179:000:35:141
4057601997366,5cyclictest4086720-21latency_hist20:40:010
4057601997364,7cyclictest266-21systemd-journal21:10:000
4057601997359,10cyclictest266-21systemd-journal21:35:120
4057602997264,6cyclictest4141318-21latency_hist23:30:011
4057601997262,7cyclictest4149520-21kworker/u8:2+events_unbound00:20:010
4057602997062,6cyclictest4134933-21kworker/u8:1+flush-179:000:15:231
4057602996863,4cyclictest4077411-21kworker/u8:0+flush-179:020:25:211
4057602996855,10cyclictest4070984-21cat19:50:021
4057601996863,3cyclictest4062305-21kworker/u8:3+flush-179:019:35:010
4057601996861,5cyclictest4110578-21apt-get21:55:000
4057601996847,19cyclictest4141575-21apt-get23:30:100
4057601996847,19cyclictest4107648-21apt-get21:45:130
4057601996759,6cyclictest4062258-21kworker/u8:2+flush-179:020:05:200
4057601996757,7cyclictest4098066-21kworker/u8:1+flush-179:021:15:230
4057601996756,9cyclictest4147938-21apt-get23:50:130
4057601996660,4cyclictest4134933-21kworker/u8:1+flush-179:023:40:240
4057601996659,5cyclictest4098066-21kworker/u8:1+flush-179:021:20:250
4057602996558,4cyclictest4117223-21kworker/u8:3+flush-179:022:25:231
4057602996459,4cyclictest4134933-21kworker/u8:1+flush-179:023:30:151
4057602996458,4cyclictest4094670-21kworker/u8:0+flush-179:021:20:151
4057602996457,5cyclictest4075569-21latency_hist20:05:011
4057601996457,5cyclictest4054439-21kworker/u8:0+flush-179:019:15:220
4057602996347,14cyclictest4125456-21kworker/u8:1+flush-179:022:45:261
4057601996355,6cyclictest4085089-21kworker/u8:1+flush-179:020:55:250
4057602996252,8cyclictest4098086-21apt-get21:15:121
4057602996152,6cyclictest4114254-21kworker/u8:1+flush-179:022:05:151
4057601996153,6cyclictest4091503-21kworker/u8:2+flush-179:021:30:260
4057601996153,6cyclictest4091503-21kworker/u8:2+flush-179:021:30:260
4057601996152,6cyclictest4068688-21latency_hist19:45:010
4057605996057,2cyclictest0-21swapper/220:34:592
4057602996048,9cyclictest266-21systemd-journal00:04:001
4057601996053,5cyclictest4131817-21kworker/u8:2+flush-179:023:05:160
4057602995954,4cyclictest4135593-21kworker/u8:3+flush-179:023:20:001
4057602995952,5cyclictest4107427-21kworker/u8:2+events_unbound22:20:021
4057602995951,6cyclictest4104200-21latency_hist21:35:001
4057602995951,6cyclictest4104200-21latency_hist21:35:001
4057601995957,1cyclictest0-21swapper/022:52:590
4057602995847,8cyclictest266-21systemd-journal23:55:011
4057602995753,3cyclictest4089309-21kworker/u8:3+flush-179:021:00:221
4057601995750,6cyclictest4128625-21kworker/u8:0+flush-179:023:20:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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