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2025-11-24 - 17:47
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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 Mon Nov 24, 2025 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3181900999988,8cyclictest3278856-21latency_hist12:10:021
3181900999982,15cyclictest3234262-21kworker/u8:1+flush-179:010:00:261
3181896999282,6cyclictest3202219-21kworker/u8:2+flush-179:009:05:240
3181900998679,5cyclictest3228518-21kworker/u8:4+flush-179:010:30:251
3181900998678,6cyclictest3283635-21latency_hist12:25:001
3181900998676,7cyclictest3199831-21/usr/sbin/munin08:05:241
3181896998665,19cyclictest3217082-21latency_hist09:00:010
4670791800,21ptp4l61690irq/136-eno1-TxRx-007:05:103
4670791800,21ptp4l61690irq/136-eno1-TxRx-007:05:093
3181896997867,9cyclictest3202219-21kworker/u8:2+flush-179:008:40:010
3181900997769,6cyclictest3236408-21kworker/u8:0+flush-179:010:25:261
3181900997361,9cyclictest271-21systemd-journal11:30:211
3181900997361,9cyclictest271-21systemd-journal11:30:201
3181896997262,7cyclictest3184988-21latency_hist07:20:020
3181896997059,9cyclictest3273815-21latency_hist11:55:010
3181896997049,19cyclictest271-21systemd-journal07:59:190
3181896996964,2cyclictest723-21Xorg09:01:000
3181900996863,3cyclictest3287212-21gpgv12:35:011
3181896996857,8cyclictest3260824-21latency_hist11:15:000
3181900996757,7cyclictest3257654-21latency_hist11:05:021
3181900996660,4cyclictest3212357-21kworker/u8:3+flush-179:008:50:001
3181900996658,6cyclictest3252907-21kworker/u8:3+events_unbound11:30:001
3181896996456,6cyclictest3282083-21kworker/u8:2+flush-179:012:25:240
3181900996354,6cyclictest3212357-21kworker/u8:3+events_unbound09:00:031
3181901996259,2cyclictest0-21swapper/209:01:002
3181900996256,3cyclictest723-21Xorg12:31:591
3181900996252,8cyclictest271-21systemd-journal07:30:001
3181905996158,2cyclictest0-21swapper/312:31:593
3181900996155,4cyclictest3249715-21kworker/u8:2+flush-179:010:50:001
3181900996154,5cyclictest3191354-21kworker/u8:1+flush-179:007:40:161
3181900996053,5cyclictest3202219-21kworker/u8:2+flush-179:008:20:231
3181896996050,7cyclictest3256054-21latency_hist11:00:010
3181900995953,4cyclictest3234262-21kworker/u8:1+flush-179:009:55:221
3181900995952,5cyclictest3212357-21kworker/u8:3+events_unbound08:55:291
3181896995948,8cyclictest3288677-21latency_hist12:40:010
3181900995849,7cyclictest3204354-21latency_hist08:20:011
3181896995853,4cyclictest3202219-21kworker/u8:2+flush-179:008:40:250
3181896995850,5cyclictest3188201-21kworker/u8:3+flush-179:007:35:260
3181900995752,4cyclictest3191354-21kworker/u8:1+flush-179:007:55:251
3181896995752,4cyclictest3197970-21kworker/u8:0+events_unbound08:14:560
3181900995648,5cyclictest3181828-21kworker/u8:3+events_unbound07:10:161
3181900995647,7cyclictest3223706-21latency_hist09:20:001
3181896995650,4cyclictest3204329-21kworker/u8:1+flush-179:008:20:000
3181896995550,4cyclictest3202219-21kworker/u8:2+flush-179:008:20:250
3181900995448,4cyclictest3195071-21apt-get07:50:121
3181900995447,6cyclictest3164564-21kworker/u8:0+flush-179:007:30:251
3181900995447,5cyclictest3188201-21kworker/u8:3+events_unbound07:40:011
3181896995449,4cyclictest3252907-21kworker/u8:3+flush-179:012:10:250
3181896995447,5cyclictest3202219-21kworker/u8:2+events_unbound08:30:250
3181896995445,7cyclictest3282048-21latency_hist12:20:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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