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2025-11-28 - 05:35
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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 Fri Nov 28, 2025 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4040559910893,11cyclictest271-21systemd-journal00:00:000
404059999486,6cyclictest451976-21apt-get21:40:001
404055999268,21cyclictest497592-21/usr/sbin/munin00:00:260
404059999181,7cyclictest492294-21latency_hist23:45:021
404055998982,5cyclictest437669-21kworker/u8:3+events_unbound21:00:010
404059998872,14cyclictest468388-21kworker/u8:3+flush-179:023:20:261
404055998572,10cyclictest271-21systemd-journal20:20:000
404055998372,8cyclictest416941-21latency_hist19:50:000
404059998276,4cyclictest421759-21kworker/u8:2+flush-179:020:40:251
404060997945,32cyclictest0-21swapper/200:27:592
404059997968,8cyclictest474777-21latency_hist22:50:011
404059997265,6cyclictest416976-21kworker/u8:1+flush-179:020:00:001
404059997058,9cyclictest431267-21latency_hist20:35:011
404059997054,13cyclictest420547-21kworker/u8:0+flush-179:020:05:211
404059996860,6cyclictest500559-21kworker/u8:0+flush-179:000:10:211
404055996860,5cyclictest418528-21latency_hist19:55:010
404055996857,8cyclictest434462-21latency_hist20:45:010
40405599680,66cyclictest1-21systemd00:40:010
404059996762,4cyclictest468388-21kworker/u8:3+flush-179:022:54:561
404059996660,4cyclictest421759-21kworker/u8:2+flush-179:021:05:251
404055996656,7cyclictest468388-21kworker/u8:3+flush-179:022:35:240
404059996559,4cyclictest487559-21kworker/u8:3+events_unbound00:20:251
404059996559,4cyclictest437669-21kworker/u8:3+events_unbound21:20:151
404055996554,8cyclictest271-21systemd-journal20:35:000
404059996457,6cyclictest437669-21kworker/u8:3+flush-179:021:20:001
404059996358,4cyclictest490742-21kworker/u8:0+flush-179:023:54:551
404059996356,5cyclictest389719-21kworker/u8:2+flush-179:019:15:211
404059996353,7cyclictest460455-21latency_hist22:05:011
404059996353,6cyclictest465896-21kworker/u8:0+flush-179:022:30:161
404060996231,2cyclictest0-21swapper/222:02:592
404059996256,4cyclictest468387-21kworker/u8:1+events_unbound22:55:201
404059996256,4cyclictest407807-21kworker/u8:0+flush-179:019:20:261
404059996248,9cyclictest271-21systemd-journal21:45:011
404055996257,4cyclictest487559-21kworker/u8:3+flush-179:000:05:240
404059996156,4cyclictest487559-21kworker/u8:3+flush-179:000:15:261
404059996155,5cyclictest485848-21kworker/u8:2+events_unbound23:30:221
404055996154,5cyclictest420547-21kworker/u8:0+flush-179:020:25:180
404055996151,7cyclictest473193-21latency_hist22:45:010
404059996049,9cyclictest467076-21apt-get22:25:121
404059996049,8cyclictest497353-40mandb00:00:001
404055996053,4cyclictest484321-21latency_hist23:20:020
404059995953,4cyclictest479537-21kworker/u8:1+flush-179:023:05:231
404055995950,6cyclictest411903-21latency_hist19:35:010
404059995853,4cyclictest496765-21kworker/u8:1+flush-179:000:00:361
404059995851,5cyclictest389719-21kworker/u8:2+events_unbound19:15:011
404059995849,6cyclictest494138-21latency_hist23:50:021
404059995848,7cyclictest450374-21latency_hist21:35:011
404059995752,4cyclictest456978-21kworker/u8:1+flush-179:022:10:221
404059995750,5cyclictest437669-21kworker/u8:3+events_unbound21:10:261
404059995649,4cyclictest473183-21kworker/u8:0+events_unbound23:00:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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