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2026-04-21 - 05:25
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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 Tue Apr 21, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9534309910698,5cyclictest1012125-21kworker/u8:1+flush-179:022:30:011
9534279910698,6cyclictest1048033-21kworker/u8:1+flush-179:000:00:010
9534279910396,5cyclictest974506-21latency_hist20:15:000
953430999988,8cyclictest1213033-21systemd-journal00:04:011
953427999880,14cyclictest967912-21http19:55:000
953430999285,5cyclictest961505-21kworker/u8:3+events_unbound19:45:011
953430998678,6cyclictest1046383-21latency_hist23:55:011
953427998672,11cyclictest1213033-21systemd-journal21:35:010
953427998575,8cyclictest1056002-21latency_hist00:25:000
953430998372,8cyclictest992514-21/usr/sbin/munin21:10:221
953430998071,6cyclictest987234-21latency_hist20:55:021
953430998070,7cyclictest1213033-21systemd-journal22:10:011
953430997970,7cyclictest1060778-21latency_hist00:40:021
953427997870,5cyclictest964950-21kworker/u8:1+flush-179:020:30:260
953427997870,5cyclictest964950-21kworker/u8:1+flush-179:020:30:260
953427997767,7cyclictest1026978-21latency_hist22:55:000
953427997668,6cyclictest976121-21latency_hist20:20:010
953430997566,7cyclictest953275-21latency_hist19:10:011
953430997565,7cyclictest1013519-21kworker/u8:2+flush-179:023:20:011
953430997562,10cyclictest1015331-21apt-get22:20:001
953430997562,10cyclictest1015331-21apt-get22:20:001
953430997265,5cyclictest990735-21kworker/u8:1+flush-179:021:20:261
953427997263,7cyclictest1008446-21latency_hist22:00:010
953430997161,8cyclictest960190-21apt-get19:30:121
953427997165,4cyclictest1035449-21/usr/sbin/munin23:20:240
953430997059,8cyclictest1213033-21systemd-journal20:36:031
953430996560,4cyclictest1024616-21kworker/u8:1+flush-179:022:59:551
953430996557,6cyclictest1213033-21systemd-journal23:32:061
953430996557,6cyclictest1013519-21kworker/u8:2+flush-179:000:00:001
953430996457,5cyclictest964950-21kworker/u8:1+flush-179:020:00:211
953427996456,6cyclictest997091-21kworker/u8:3+events_unbound21:45:000
953430996354,7cyclictest985683-21kworker/u8:0+flush-179:020:55:161
953430996354,7cyclictest958338-21kworker/u8:0+flush-179:019:25:001
953430996353,8cyclictest984323-21apt-get20:45:111
953427996354,7cyclictest1038622-21/usr/sbin/munin23:30:240
953430996254,6cyclictest1013519-21kworker/u8:2+flush-179:022:40:261
953430995848,8cyclictest1017441-21apt-get22:25:131
953430995750,5cyclictest1010019-21kworker/u8:0+flush-179:022:20:171
953430995647,7cyclictest955431-21diskstats19:15:151
953430995643,10cyclictest1213033-21systemd-journal23:47:051
953427995647,7cyclictest1041833-21apt-get23:40:110
953427995647,6cyclictest1006848-21latency_hist21:55:010
953432995553,1cyclictest0-21swapper/219:24:592
953430995549,4cyclictest1051221-21latency_hist00:10:011
953430995548,5cyclictest958603-21apt-get19:25:121
953430995546,7cyclictest967880-21latency_hist19:55:011
953427995547,6cyclictest1038381-21latency_hist23:30:000
953427995543,9cyclictest976071-21kworker/u8:3+flush-179:020:35:230
953430995448,4cyclictest1041546-21kworker/u8:1+flush-179:023:44:561
953430995445,7cyclictest1003430-21apt-get21:45:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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