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2025-11-26 - 05:38
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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 (updated Wed Nov 26, 2025 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
319657199106102,3cyclictest3281386-21kworker/u8:0+events_unbound00:04:011
31965719910085,12cyclictest3258278-21latency_hist22:20:001
3196565999787,7cyclictest3250060-21latency_hist21:55:010
3196571999285,6cyclictest3266500-21kworker/u8:2+events_unbound23:00:011
3196571999285,6cyclictest3266500-21kworker/u8:2+events_unbound23:00:001
3196571998783,3cyclictest3183812-21kworker/u8:1+flush-179:019:20:241
3196571998680,5cyclictest3251625-21kworker/u8:2+flush-179:022:05:261
3196571998679,5cyclictest3228839-21kworker/u8:0+flush-179:021:20:011
3196565998475,7cyclictest3290921-40mandb00:00:010
3196571998368,14cyclictest3214043-21kworker/u8:2+flush-179:020:40:001
3196571998276,5cyclictest3251625-21kworker/u8:2+events_unbound22:20:021
3196565998272,8cyclictest3215592-21latency_hist20:10:010
3196571998168,4cyclictest3207618-21kworker/u8:1+events_unbound20:20:141
3196565998066,12cyclictest3254844-21apt-get22:10:000
3196571997975,3cyclictest3214043-21kworker/u8:2+flush-179:020:10:271
3196571997873,4cyclictest3266500-21kworker/u8:2+flush-179:023:15:261
3196571997772,4cyclictest3281386-21kworker/u8:0+events_unbound00:05:241
3196571997772,4cyclictest3259011-21kworker/u8:0+flush-179:022:30:211
3196571997570,4cyclictest3241573-21kworker/u8:3+flush-179:021:30:271
3196571997468,5cyclictest3214043-21kworker/u8:2+flush-179:020:55:011
3196571997363,7cyclictest3281386-21kworker/u8:0+events_unbound23:40:191
3196571997362,8cyclictest3248473-21latency_hist21:50:011
3196565997363,7cyclictest3221130-21/usr/sbin/munin20:25:240
3196571997267,4cyclictest3197535-21kworker/u8:0+events_unbound19:35:251
3196571997258,4cyclictest3214043-21kworker/u8:2+events_unbound20:45:151
3196565997262,7cyclictest3212407-21latency_hist20:00:020
3196573997136,33cyclictest0-21swapper/221:50:592
3196571997166,4cyclictest3283989-21kworker/u8:3+events_unbound23:35:241
3196571997164,5cyclictest3214043-21kworker/u8:2+events_unbound20:25:221
3196571997061,3cyclictest3197535-21kworker/u8:0+events_unbound19:30:261
3196571996964,4cyclictest3197535-21kworker/u8:0+flush-179:019:55:241
3196571996856,9cyclictest3290921-40mandb00:00:001
3196565996857,8cyclictest3264913-21latency_hist22:40:010
3196571996762,4cyclictest3260176-21kworker/u8:3+events_unbound23:20:231
3196571996762,4cyclictest3260176-21kworker/u8:3+events_unbound23:20:221
3196571996757,4cyclictest3255337-21kworker/u8:1+events_unbound22:10:271
3196565996657,6cyclictest3214043-21kworker/u8:2+events_unbound20:20:000
3196571996561,3cyclictest3243671-21kworker/u8:0+flush-179:022:00:241
3196571996556,7cyclictest3271790-21/usr/sbin/munin23:00:241
3196571996556,3cyclictest3197535-21kworker/u8:0+events_unbound19:15:221
3196571996460,3cyclictest3228839-21kworker/u8:0+flush-179:021:10:221
3196571996460,3cyclictest3214043-21kworker/u8:2+flush-179:021:05:201
3196571996459,4cyclictest3207875-21kworker/u8:2+events_unbound19:45:241
3196571996458,5cyclictest3281386-21kworker/u8:0+flush-179:000:14:561
3196571996458,5cyclictest3281386-21kworker/u8:0+flush-179:000:14:551
3196574996359,2cyclictest0-21swapper/323:43:593
3196571996359,3cyclictest3225636-21kworker/u8:0+flush-179:020:40:131
3196571996359,3cyclictest3221435-21kworker/u8:0+events_unbound20:30:251
3196571996358,4cyclictest3260176-21kworker/u8:3+flush-179:023:10:231
3196571996257,4cyclictest3228839-21kworker/u8:0+flush-179:021:04:551
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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