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2025-12-04 - 04:01
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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 Thu Dec 04, 2025 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
44225499147131,12cyclictest536622-40mandb00:00:011
4422509910396,5cyclictest519079-21kworker/u8:0+events_unbound23:20:000
4422509910190,9cyclictest511185-21gpgv22:40:010
442250999785,9cyclictest484664-21latency_hist21:20:010
442250999487,5cyclictest455278-21kworker/u8:1+events_unbound19:55:000
442256999359,32cyclictest0-21swapper/219:25:592
442250999385,6cyclictest446988-21kworker/u8:3+flush-179:019:30:320
442261999056,33cyclictest0-21swapper/319:25:593
442254998984,4cyclictest505839-21kworker/u8:3+events_unbound22:30:241
442254998982,5cyclictest515937-21kworker/u8:2+flush-179:023:00:011
442254998980,7cyclictest440809-21kworker/u8:0+flush-179:020:10:011
442254998881,5cyclictest446988-21kworker/u8:3+events_unbound19:25:401
442254998476,6cyclictest515937-21kworker/u8:2+flush-179:023:05:011
442250998472,9cyclictest271-21systemd-journal19:19:330
442250998472,9cyclictest271-21systemd-journal19:19:330
442254998377,4cyclictest515937-21kworker/u8:2+flush-179:000:40:001
442254998376,5cyclictest496069-21kworker/u8:2+events_unbound22:05:011
442254998376,5cyclictest496069-21kworker/u8:2+events_unbound22:05:001
442250998376,6cyclictest446988-21kworker/u8:3+flush-179:019:40:000
442254998276,4cyclictest460307-21kworker/u8:3+flush-179:020:35:241
442254998276,4cyclictest460307-21kworker/u8:3+flush-179:020:35:011
442254998275,5cyclictest505839-21kworker/u8:3+events_unbound22:30:011
442254998275,5cyclictest505839-21kworker/u8:3+events_unbound22:30:001
442254997974,4cyclictest525719-21kworker/u8:0+events_unbound23:55:011
442254997967,5cyclictest426872-21kworker/u8:2+events_unbound19:15:251
442254997967,5cyclictest426872-21kworker/u8:2+events_unbound19:15:251
442254997870,6cyclictest455278-21kworker/u8:1+flush-179:020:25:001
442254997771,4cyclictest505839-21kworker/u8:3+events_unbound22:35:241
442250997772,4cyclictest460307-21kworker/u8:3+events_unbound21:40:000
442254997671,4cyclictest488322-21kworker/u8:1+events_unbound21:35:241
442254997667,7cyclictest271-21systemd-journal21:00:001
442250997669,5cyclictest525719-21kworker/u8:0+events_unbound23:45:240
442250997668,6cyclictest460307-21kworker/u8:3+events_unbound21:10:210
442250997666,8cyclictest503999-21latency_hist22:20:020
442250997666,7cyclictest505852-21latency_hist22:25:020
442254997569,4cyclictest460307-21kworker/u8:3+events_unbound20:20:001
442250997569,4cyclictest515937-21kworker/u8:2+events_unbound00:10:180
442250997470,3cyclictest479653-21kworker/u8:2+events_unbound21:05:260
442250997468,4cyclictest515937-21kworker/u8:2+events_unbound23:00:000
442250997365,5cyclictest525719-21kworker/u8:0+flush-179:023:40:230
442250997365,5cyclictest525719-21kworker/u8:0+flush-179:023:40:220
44225099731,68cyclictest478067-21unin-run21:00:010
442254997266,4cyclictest486227-21kworker/u8:0+flush-179:021:25:211
442254997165,4cyclictest519079-21kworker/u8:0+flush-179:023:15:221
442254997164,4cyclictest496012-21kworker/u8:1+events_unbound21:55:141
442250997161,8cyclictest486477-21/usr/sbin/munin21:25:260
442254997064,4cyclictest520716-21kworker/u8:3+events_unbound23:20:261
442254997061,6cyclictest426872-21kworker/u8:2+flush-179:019:20:211
442250997062,6cyclictest510952-21kworker/u8:0+flush-179:022:50:000
442250997062,5cyclictest515937-21kworker/u8:2+events_unbound23:35:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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