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2026-06-08 - 13:31
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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 Jun 08, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
336511799133116,13cyclictest3458953-40mandb00:00:010
45770911320,14ptp4l61490irq/134-eno1-TxRx-019:07:593
336511999128117,8cyclictest3440933-21kworker/u8:2+flush-179:023:35:001
336511799118107,8cyclictest1213033-21systemd-journal19:50:010
336511799114103,8cyclictest3395533-21latency_hist20:45:020
336511799106100,4cyclictest3414892-21kworker/u8:1+events_unbound21:45:000
33651179910393,7cyclictest3408272-21latency_hist21:25:010
33651179910191,8cyclictest3390748-21latency_hist20:30:010
33651179910191,7cyclictest3381195-21latency_hist20:00:010
3365117999689,5cyclictest3373209-21kworker/u8:3+flush-179:020:20:240
3365117999286,4cyclictest3373209-21kworker/u8:3+flush-179:020:05:250
3365117999080,7cyclictest3460582-21latency_hist00:05:010
3365119998782,3cyclictest3373226-21latency_hist19:35:001
3365119998374,6cyclictest3447505-21kworker/u8:0+flush-179:023:40:011
3365117998375,5cyclictest3447505-21kworker/u8:0+events_unbound23:30:000
3365117998374,6cyclictest3371382-21latency_hist19:30:010
3365119998264,12cyclictest3458989-21cups-browsed00:00:011
3365117998273,7cyclictest3440898-21latency_hist23:05:000
3365117998273,6cyclictest3389420-21kworker/u8:1+flush-179:021:10:220
3365119998072,5cyclictest3376421-21latency_hist19:45:011
3365117998073,5cyclictest3413267-21kworker/u8:0+flush-179:022:15:160
3365117998072,6cyclictest3397097-21kworker/u8:2+events_unbound21:09:590
3365119997869,7cyclictest3440063-21kworker/u8:1+flush-179:023:15:011
3365117997872,4cyclictest3360440-21kworker/u8:2+flush-179:019:10:120
3365117997871,5cyclictest3434313-21kworker/u8:3+flush-179:023:00:000
3365117997670,5cyclictest3436094-21kworker/u8:0+flush-179:022:55:000
3365117997468,4cyclictest3424704-21latency_hist22:15:000
3365117997466,6cyclictest1213033-21systemd-journal23:55:010
3365119997363,7cyclictest1213033-21systemd-journal19:15:001
3365117997365,6cyclictest3389420-21kworker/u8:1+flush-179:020:55:160
3365119997263,6cyclictest3373209-21kworker/u8:3+flush-179:020:10:001
3365119997262,8cyclictest1213033-21systemd-journal19:40:001
3365119997262,7cyclictest3398705-21latency_hist20:55:011
3365119997162,7cyclictest3434313-21kworker/u8:3+flush-179:022:50:261
3365119997162,6cyclictest3368205-21latency_hist19:20:011
3365117997163,5cyclictest3431058-21kworker/u8:2+flush-179:022:40:230
3365117997065,4cyclictest3452807-21kworker/u8:3+events_unbound00:25:010
3365119996965,3cyclictest3413267-21kworker/u8:0+events_unbound22:05:011
3365119996958,9cyclictest3431058-21kworker/u8:2+flush-179:022:40:011
3365117996961,6cyclictest3392303-21kworker/u8:2+flush-179:020:35:170
3365117996861,5cyclictest3405311-21kworker/u8:2+flush-179:021:30:210
3365117996763,3cyclictest1213033-21systemd-journal20:50:000
3365117996759,6cyclictest3452807-21kworker/u8:3+events_unbound23:40:250
3365119996656,8cyclictest3391004-21apt-get20:30:121
3365117996657,7cyclictest3440933-21kworker/u8:2+events_unbound23:20:260
3365117996656,8cyclictest1213033-21systemd-journal23:40:000
3365117996558,4cyclictest1-21systemd00:40:000
3365117996557,6cyclictest3413267-21kworker/u8:0+events_unbound22:00:140
3365117996552,9cyclictest510-21rs:main0
3365119996454,8cyclictest3445693-21latency_hist23:20:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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