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2026-05-04 - 05:12
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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 May 04, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
345248999120115,4cyclictest3539493-21kworker/u8:3+events_unbound00:04:011
34524899910793,10cyclictest3457181-21latency_hist19:25:011
34524899910091,6cyclictest3533100-21latency_hist23:20:011
3452489999981,16cyclictest3518739-21kworker/u8:0+events_unbound22:45:261
3452485999991,6cyclictest3550658-21latency_hist00:15:020
3452489999586,7cyclictest3450909-21kworker/u8:3+flush-179:019:50:001
3452489999182,7cyclictest3536279-21latency_hist23:30:011
3452489999182,7cyclictest3536279-21latency_hist23:30:011
3452489998883,4cyclictest3499385-21kworker/u8:2+events_unbound21:50:241
3452485998678,6cyclictest3470176-21latency_hist20:05:010
3452485998677,6cyclictest3557294-21latency_hist00:35:010
3452489998581,3cyclictest3462257-21kworker/u8:0+events_unbound19:55:251
3452485998576,6cyclictest1-21systemd22:40:000
3452489998378,4cyclictest3450909-21kworker/u8:3+events_unbound19:35:261
3452489998378,4cyclictest3450909-21kworker/u8:3+events_unbound19:35:251
3452489998276,4cyclictest3438148-21kworker/u8:0+events_unbound19:30:141
3452489998176,4cyclictest3518739-21kworker/u8:0+events_unbound23:30:221
3452489998072,5cyclictest3512387-21apt-get22:15:111
3452489998070,4cyclictest3507367-21kworker/u8:3+events_unbound22:20:181
3452485998070,7cyclictest3518739-21kworker/u8:0+flush-179:022:40:150
3452489997975,3cyclictest3534727-21kworker/u8:1+events_unbound00:10:211
3452489997774,2cyclictest3489830-21kworker/u8:1+events_unbound21:20:131
3452489997773,3cyclictest3493019-21kworker/u8:0+events_unbound21:15:231
3452489997767,4cyclictest3470155-21kworker/u8:2+events_unbound20:20:201
3452489997671,4cyclictest3512165-21kworker/u8:1+events_unbound22:30:251
3452485997565,6cyclictest3512165-21kworker/u8:1+flush-179:022:20:210
3452489997466,3cyclictest3490091-21kworker/u8:2+events_unbound21:05:201
3452489997461,10cyclictest764075-21cups-browsed00:00:001
3452485997464,7cyclictest3553854-21latency_hist00:25:000
3452489997369,3cyclictest3518739-21kworker/u8:0+events_unbound23:35:171
3452489997368,4cyclictest3549107-21kworker/u8:2+events_unbound00:16:231
3452489997267,4cyclictest3499385-21kworker/u8:2+flush-179:022:04:561
3452485997264,5cyclictest3468571-21latency_hist20:00:010
3452489997167,3cyclictest3470155-21kworker/u8:2+events_unbound20:05:211
3452485997161,7cyclictest3518762-21latency_hist22:35:010
3452485997063,4cyclictest3470155-21kworker/u8:2+flush-179:020:40:230
3452485997062,5cyclictest3501243-21kworker/u8:1+flush-179:021:59:590
3452489996964,4cyclictest3501243-21kworker/u8:1+events_unbound21:59:561
3452489996964,4cyclictest3499385-21kworker/u8:2+flush-179:021:49:551
3452489996964,4cyclictest3485309-21kworker/u8:0+flush-179:021:00:251
3452489996864,3cyclictest3524182-21kworker/u8:2+flush-179:023:09:551
3452489996859,7cyclictest3483464-21/usr/sbin/munin20:45:231
3452485996852,12cyclictest3545867-40mandb00:00:000
3452489996763,3cyclictest3545890-21kworker/u8:0+flush-179:000:09:551
3452489996762,3cyclictest714-21Xorg21:28:591
3452489996757,7cyclictest3528324-21latency_hist23:05:001
3452485996756,9cyclictest3501246-21/usr/sbin/munin21:40:240
3452485996756,9cyclictest3501246-21/usr/sbin/munin21:40:240
3452489996662,3cyclictest3496215-21kworker/u8:0+flush-179:022:05:261
3452489996661,4cyclictest3450909-21kworker/u8:3+flush-179:019:19:551
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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