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2025-11-23 - 14:49
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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 Sun Nov 23, 2025 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3156536999083,5cyclictest3190200-21kworker/u8:3+events_unbound21:00:000
3156536998978,8cyclictest3242176-21latency_hist23:35:010
3156540998881,5cyclictest3193618-21kworker/u8:0+flush-179:021:25:251
3156540998680,4cyclictest3230775-21latency_hist23:00:001
3156540998573,9cyclictest3224666-21/usr/sbin/munin22:40:241
3156536998478,4cyclictest3213059-21kworker/u8:3+events_unbound23:10:000
3156536998376,4cyclictest3180363-21kworker/u8:1+flush-179:020:25:280
3156536998174,5cyclictest3154994-21kworker/u8:1+events_unbound20:05:000
3156536998174,5cyclictest3154994-21kworker/u8:1+events_unbound20:05:000
3156536998171,7cyclictest3203209-21latency_hist21:35:000
3156540998073,5cyclictest3206390-21kworker/u8:0+flush-179:022:05:001
3156536997767,7cyclictest3175591-21latency_hist20:10:010
3156536997363,8cyclictest3156452-21latency_hist19:10:020
3156536997165,4cyclictest3193618-21kworker/u8:0+flush-179:021:05:230
3156540997060,7cyclictest3261862-21latency_hist00:35:001
3156536997063,5cyclictest3216210-21apt-get22:14:590
3156536996964,4cyclictest3175574-21kworker/u8:2+flush-179:021:10:160
3156536996962,5cyclictest3213003-21kworker/u8:2+events_unbound22:25:010
3156536996959,8cyclictest3164688-21/usr/sbin/munin19:35:310
3156536996754,10cyclictest271-21systemd-journal00:40:000
3156536996656,7cyclictest3154994-21kworker/u8:1+flush-179:019:55:010
3156536996653,9cyclictest3198127-21apt-get21:19:590
3156540996455,7cyclictest3178766-21latency_hist20:20:001
3156536996456,6cyclictest3193618-21kworker/u8:0+flush-179:021:25:490
3156536996356,4cyclictest3222802-21kworker/u8:1+flush-179:022:45:160
3156536996254,5cyclictest3187032-21kworker/u8:1+flush-179:020:50:240
3156536996254,5cyclictest3187032-21kworker/u8:1+flush-179:020:50:240
3156536996252,7cyclictest3226015-21latency_hist22:45:020
3156540996153,6cyclictest3232635-21apt-get23:05:111
3156540996049,8cyclictest3239004-21latency_hist23:25:001
3156540996042,17cyclictest3245414-21kworker/u8:1+flush-179:000:20:001
3156540995953,4cyclictest3222802-21kworker/u8:1+flush-179:023:30:241
3156536995952,5cyclictest3206390-21kworker/u8:0+events_unbound21:50:010
3156536995948,8cyclictest3216709-21apt-get22:15:130
3156540995853,3cyclictest3222802-21kworker/u8:1+flush-179:023:10:261
3156536995853,4cyclictest3245414-21kworker/u8:1+flush-179:000:00:230
3156540995748,7cyclictest3255228-21latency_hist00:15:011
3156540995748,6cyclictest3232425-21kworker/u8:2+events_unbound23:15:251
3156540995647,6cyclictest3193360-21latency_hist21:05:011
3156536995650,5cyclictest3154994-21kworker/u8:1+flush-179:019:20:220
3156540995551,3cyclictest723-21Xorg19:54:591
3156540995547,6cyclictest3240589-21latency_hist23:30:011
3156536995547,6cyclictest3222866-21kworker/u8:2+flush-179:022:35:260
3156540995450,2cyclictest3250576-21apt-config00:00:021
3156536995441,10cyclictest3250130-21latency_hist00:00:020
3156540995349,3cyclictest3153433-21kworker/u8:3+flush-179:019:30:261
3156540995348,4cyclictest3213059-21kworker/u8:3+events_unbound22:50:201
3156540995345,6cyclictest271-21systemd-journal20:26:421
3156540995236,14cyclictest3232425-21kworker/u8:2+flush-179:023:45:131
3156536995246,5cyclictest3242217-21kworker/u8:0+events_unbound23:35:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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