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2026-03-28 - 21:19
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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 Sat Mar 28, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3233085999384,7cyclictest3234616-21latency_hist07:15:020
3233086999183,6cyclictest3328574-21latency_hist12:05:011
3233085998979,7cyclictest3267065-21latency_hist08:55:000
3233086998471,10cyclictest3320091-21latency_hist11:40:011
3233086998274,6cyclictest3241285-21kworker/u8:1+events_unbound08:20:241
3233086998175,4cyclictest3299116-21kworker/u8:0+events_unbound10:35:001
3233086998066,11cyclictest3305546-21kworker/u8:3+events_unbound11:05:011
3233085997971,6cyclictest3244540-21latency_hist07:45:010
3233086997869,7cyclictest3294120-21latency_hist10:20:011
3233085997567,6cyclictest3336525-21latency_hist12:30:000
3233085997466,6cyclictest3320090-21apt-get11:40:040
3233086997065,4cyclictest3313466-21apt-get11:20:011
3233085996950,16cyclictest3276624-21latency_hist09:25:010
3233085996651,13cyclictest3295971-21apt-get10:25:110
3233086996458,4cyclictest3247754-21kworker/u8:3+events_unbound08:10:251
3233086996457,5cyclictest3271631-21kworker/u8:3+flush-179:009:10:001
3233086996455,7cyclictest3234604-21kworker/u8:0+flush-179:007:20:011
3233085996460,2cyclictest714-21Xorg07:39:590
3233086996354,6cyclictest3325617-21kworker/u8:0+flush-179:011:55:201
3233086996354,6cyclictest3325617-21kworker/u8:0+flush-179:011:55:191
3233086996353,7cyclictest266-21systemd-journal07:50:231
3233086996257,4cyclictest3310526-21kworker/u8:0+flush-179:011:30:241
3233086996156,4cyclictest3325617-21kworker/u8:0+flush-179:012:20:251
3233086996156,4cyclictest3325617-21kworker/u8:0+flush-179:012:20:251
3233086996153,6cyclictest3271631-21kworker/u8:3+flush-179:009:10:211
3233086995951,6cyclictest3310526-21kworker/u8:0+flush-179:011:20:251
3233086995851,5cyclictest3320111-21kworker/u8:1+flush-179:011:45:241
3233086995549,4cyclictest3336781-21apt-get12:30:121
3233086995548,5cyclictest3287317-21kworker/u8:2+flush-179:010:00:001
3233086995547,6cyclictest3241285-21kworker/u8:1+events_unbound08:00:181
3233086995545,7cyclictest3279799-21latency_hist09:35:011
3233086995448,4cyclictest3260690-21kworker/u8:0+flush-179:009:00:221
3233086995445,5cyclictest3318111-21kworker/u8:3+flush-179:011:40:051
3233086995347,4cyclictest3214259-21kworker/u8:1+flush-179:007:10:141
3233086995343,8cyclictest3280054-21apt-get09:35:101
3233086995335,17cyclictest3295951-21kworker/u8:1+flush-179:010:50:011
3233085995345,5cyclictest3310526-21kworker/u8:0+events_unbound11:30:000
3233085995343,8cyclictest3291192-21apt-get10:10:110
3233085995339,12cyclictest3250942-21systemd-run08:05:010
3233086995246,4cyclictest3271631-21kworker/u8:3+flush-179:010:05:151
3233086995244,6cyclictest3231538-21kworker/u8:3+events_unbound07:30:001
3233086995146,4cyclictest3310526-21kworker/u8:0+flush-179:011:14:551
3233086995145,4cyclictest3330411-21kworker/u8:1+flush-179:012:15:011
3233086995144,5cyclictest3214259-21kworker/u8:1+events_unbound07:25:011
3233086995138,10cyclictest266-21systemd-journal09:25:001
3233086995044,4cyclictest3284830-21kworker/u8:0+flush-179:009:50:141
3233085995046,3cyclictest3239892-21kworker/u8:0+flush-179:007:30:170
323308599500,49cyclictest0-21swapper/008:30:000
323308599500,49cyclictest0-21swapper/008:29:590
323308599500,46cyclictest0-21swapper/008:45:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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