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2023-12-11 - 23:53
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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 20 highest latencies:
System rackeslot6 (updated Mon Dec 11, 2023 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
34482769913093,34cyclictest3507849-21latency_hist10:15:010
34482789910597,6cyclictest3486651-21latency_hist09:10:011
344827899105100,4cyclictest3528100-21kworker/u8:2+flush-179:012:15:351
34482789910092,6cyclictest3493279-21latency_hist09:30:011
3448276999885,10cyclictest2158010-21systemd-journal11:25:010
3448276999490,3cyclictest3461175-21kworker/u8:2+flush-179:009:10:360
3448276999490,3cyclictest3461175-21kworker/u8:2+flush-179:009:10:360
3448278999284,6cyclictest3517424-21apt-get10:45:011
3448276999284,6cyclictest3429190-21kworker/u8:1+flush-179:007:20:350
3448278998980,7cyclictest3490104-21latency_hist09:20:011
3448276998776,9cyclictest3469143-21apt-get08:15:220
3448278998575,7cyclictest3484808-21latency_hist09:05:021
3448278998277,3cyclictest3454532-21kworker/u8:0+events_unbound07:50:251
3448276998269,10cyclictest3543400-21apt-get12:04:590
3448276998071,7cyclictest2158010-21systemd-journal10:45:340
3448276997867,9cyclictest3464386-21apt-get08:00:240
3448276997766,9cyclictest3538861-21apt-get11:50:200
3448276997672,3cyclictest3470527-21kworker/u8:3+events_unbound08:29:560
3448278997367,4cyclictest3478430-21kworker/u8:3+flush-179:008:50:391
3448276997360,10cyclictest3453221-21apt-get07:25:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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