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2026-05-13 - 08:43
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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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackeslot6.osadl.org (updated Wed May 13, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31901129910796,8cyclictest3297013-21latency_hist00:40:011
31901129910392,8cyclictest3195081-21latency_hist19:25:011
31901129910195,4cyclictest3282334-21kworker/u8:0+flush-179:000:00:281
31901129910192,7cyclictest3290632-21latency_hist00:20:011
31901129910083,13cyclictest3283977-40mandb00:00:011
3190109999884,11cyclictest3253200-21latency_hist22:25:010
3190112999788,6cyclictest3214155-21kworker/u8:0+events_unbound20:25:241
3190109999585,7cyclictest3236769-21apt-get21:35:030
3190112999384,6cyclictest3238610-21latency_hist21:40:011
3190112999278,10cyclictest3251340-21latency_hist22:20:021
3190112999085,4cyclictest3190054-21kworker/u8:3+events_unbound19:45:231
3190112998883,4cyclictest3246611-21kworker/u8:1+events_unbound22:05:241
3190112998782,4cyclictest3222424-21kworker/u8:4+events_unbound21:05:231
3190112998576,6cyclictest3246576-21latency_hist22:05:001
3190112998452,4cyclictest3282334-21kworker/u8:0+events_unbound00:05:131
3190109998376,5cyclictest3234752-21kworker/u8:2+flush-179:021:55:240
3190112998277,4cyclictest3248698-21kworker/u8:0+events_unbound22:10:241
3190112998275,5cyclictest3249786-21kworker/u8:2+events_unbound22:50:241
3190112998274,6cyclictest3275987-21latency_hist23:35:011
3190112998274,6cyclictest3275987-21latency_hist23:35:011
3190112998177,3cyclictest3190054-21kworker/u8:3+flush-179:019:25:261
3190112998175,4cyclictest3264570-21kworker/u8:0+events_unbound23:00:181
3190112998171,7cyclictest3219199-21latency_hist20:40:011
3190109998172,6cyclictest3219457-21/usr/sbin/munin20:40:250
3190112997974,4cyclictest3227212-21kworker/u8:1+flush-179:021:40:131
3190112997870,6cyclictest3240243-21kworker/u8:0+events_unbound21:45:201
3190112997870,5cyclictest3274390-21kworker/u8:1+events_unbound23:50:141
3190112997869,6cyclictest3241831-21kworker/u8:3+events_unbound21:50:211
3190112997765,10cyclictest3221058-21apt-get20:45:111
3190109997769,5cyclictest3204661-21kworker/u8:1+flush-179:020:10:260
3190112997671,3cyclictest3222424-21kworker/u8:4+events_unbound21:20:181
3190112997570,4cyclictest3204661-21kworker/u8:1+flush-179:020:10:221
3190112997466,6cyclictest3261408-21latency_hist22:50:011
3190109997461,9cyclictest3283926-21kworker/u8:2+flush-179:000:15:160
3190112997367,4cyclictest3233044-21kworker/u8:0+events_unbound21:25:171
3190109997365,5cyclictest3222424-21kworker/u8:4+events_unbound21:05:010
3190112997267,4cyclictest3272801-21kworker/u8:0+flush-179:023:40:241
3190109997252,18cyclictest3258477-21/usr/sbin/munin22:40:230
3190112997166,4cyclictest3241831-21kworker/u8:3+events_unbound22:30:241
3190112997166,4cyclictest3184008-21kworker/u8:2+flush-179:019:15:241
3190112997165,4cyclictest3217591-21kworker/u8:3+flush-179:020:55:201
3190109997159,9cyclictest510-21rs:main0
3190112997060,7cyclictest3255045-21latency_hist22:30:011
3190109997061,6cyclictest3274390-21kworker/u8:1+flush-179:000:00:010
3190109997061,6cyclictest3212588-21latency_hist20:20:010
3190112996964,4cyclictest3222424-21kworker/u8:4+flush-179:021:10:151
3190112996964,4cyclictest3190054-21kworker/u8:3+flush-179:019:35:151
3190112996962,6cyclictest3249786-21kworker/u8:2+events_unbound22:20:021
3190112996961,6cyclictest3217611-21latency_hist20:35:011
3190109996960,7cyclictest3201447-21latency_hist19:45:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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