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2026-05-05 - 00:32
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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 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6320499910194,5cyclictest675267-21kworker/u8:0+events_unbound09:55:001
632049999992,5cyclictest687686-21kworker/u8:0+flush-179:010:00:221
632049998981,6cyclictest732119-21latency_hist12:20:001
632049998778,7cyclictest660950-21latency_hist08:40:011
632049998778,6cyclictest654586-21latency_hist08:20:011
632049998274,5cyclictest3666621-21kworker/u8:3+flush-179:007:45:221
632049998172,6cyclictest727210-21kworker/u8:2+events_unbound12:05:241
632049998070,7cyclictest650912-21journal-offline08:05:231
632049997662,11cyclictest680054-21latency_hist09:40:001
632048997669,5cyclictest676910-21kworker/u8:1+flush-179:009:55:230
632049997260,8cyclictest693036-21kworker/u8:1+flush-179:010:35:211
632049997260,8cyclictest693036-21kworker/u8:1+flush-179:010:35:211
632049997063,5cyclictest714258-21kworker/u8:4+flush-179:011:59:551
632049997062,5cyclictest668955-21kworker/u8:1+flush-179:009:05:211
632048997063,5cyclictest3666621-21kworker/u8:3+flush-179:007:55:210
632049996963,4cyclictest733736-21kworker/u8:1+flush-179:012:30:171
632049996963,4cyclictest714258-21kworker/u8:4+flush-179:011:50:171
632048996760,5cyclictest693036-21kworker/u8:1+flush-179:010:20:260
632048996758,6cyclictest689870-21latency_hist10:10:010
632049996658,6cyclictest1213033-21systemd-journal10:58:221
632051996534,1cyclictest0-21swapper/309:25:003
632049996556,6cyclictest714258-21kworker/u8:4+flush-179:011:35:221
632048996554,8cyclictest1213033-21systemd-journal08:10:220
632048996454,8cyclictest730760-21apt-get12:15:120
632049996258,3cyclictest687686-21kworker/u8:0+flush-179:010:05:261
632048996253,7cyclictest714258-21kworker/u8:4+flush-179:011:25:010
632048996251,9cyclictest649566-21apt-get08:05:000
632049996154,5cyclictest693036-21kworker/u8:1+events_unbound10:40:151
632049996154,5cyclictest654568-21kworker/u8:1+flush-179:008:30:211
632049996146,11cyclictest510-21rs:main1
632049996055,4cyclictest709475-21kworker/u8:2+flush-179:011:10:251
632048996053,6cyclictest676910-21kworker/u8:1+flush-179:009:40:000
632049995954,3cyclictest701057-21kworker/u8:2+flush-179:010:50:161
632049995952,5cyclictest733701-21latency_hist12:25:011
632048995949,7cyclictest683501-21latency_hist09:50:020
632049995850,5cyclictest693036-21kworker/u8:1+events_unbound10:45:241
632049995850,5cyclictest680080-21apt-get09:40:031
632049995848,7cyclictest672070-21kworker/u8:2+events_unbound09:25:141
632049995848,6cyclictest683510-21kworker/u8:3+flush-179:010:25:161
632049995654,1cyclictest0-21swapper/109:58:581
632049995639,15cyclictest709475-21kworker/u8:2+flush-179:011:20:201
632048995651,4cyclictest689853-21kworker/u8:1+flush-179:010:11:230
632048995649,5cyclictest669463-21diskstats09:05:150
632048995646,8cyclictest649694-21kworker/u8:2+flush-179:008:55:010
63204899561,53cyclictest484-21dbus-daemon11:58:230
632049995549,4cyclictest729581-21kworker/u8:0+flush-179:012:35:171
632048995545,8cyclictest665979-21apt-get08:55:110
632048995512,41cyclictest0-21swapper/008:05:010
632049995451,2cyclictest629925-21kworker/u8:1+events_unbound07:10:181
632049995449,4cyclictest693036-21kworker/u8:1+flush-179:010:19:561
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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