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2026-04-02 - 15:34
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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 Apr 02, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21364799111106,4cyclictest211977-21kworker/u8:1+events_unbound07:20:441
21364799110100,7cyclictest243327-21latency_hist09:05:021
21364799110100,7cyclictest243327-21latency_hist09:05:011
213647999989,7cyclictest300868-21latency_hist12:05:011
213647999283,7cyclictest266-21systemd-journal09:39:591
213643999083,5cyclictest241728-21latency_hist09:00:010
213643998878,8cyclictest211977-21kworker/u8:1+flush-179:009:25:010
213643998876,8cyclictest291310-21latency_hist11:35:000
213643998476,5cyclictest306519-21kworker/u8:3+events_unbound12:30:230
213647998277,4cyclictest259259-21kworker/u8:1+events_unbound10:20:201
213643998173,6cyclictest297671-21latency_hist11:55:000
213643998075,3cyclictest215415-21kworker/u8:2+flush-179:007:25:200
213643998074,4cyclictest275443-21kworker/u8:1+events_unbound12:15:210
213647997974,4cyclictest278616-21kworker/u8:3+events_unbound10:55:201
213643997968,9cyclictest270384-21apt-get10:30:000
213643997870,6cyclictest292904-21latency_hist11:40:010
213647997766,8cyclictest217329-21latency_hist07:30:011
213643997667,7cyclictest267189-21latency_hist10:20:000
213647997570,4cyclictest211977-21kworker/u8:1+events_unbound08:31:011
213647997469,4cyclictest259259-21kworker/u8:1+events_unbound10:25:231
213647997469,3cyclictest286596-21kworker/u8:3+events_unbound11:30:021
213647997467,6cyclictest297707-21kworker/u8:0+events_unbound12:20:241
213647997466,6cyclictest223712-21apt-get08:05:071
213643997468,4cyclictest211977-21kworker/u8:1+events_unbound07:15:190
213647997365,6cyclictest288138-21latency_hist11:25:021
213647997268,3cyclictest217311-21kworker/u8:0+events_unbound07:35:211
213647997267,4cyclictest231980-21kworker/u8:3+events_unbound09:28:011
213643997266,4cyclictest275443-21kworker/u8:1+flush-179:011:20:210
213643997264,6cyclictest304035-21latency_hist12:15:010
213647997160,9cyclictest265845-21apt-get10:15:121
213643997163,6cyclictest244912-21latency_hist09:10:010
213647997060,8cyclictest227141-21apt-get08:15:101
213643997059,9cyclictest219996-21apt-get07:45:080
213647996964,4cyclictest306519-21kworker/u8:3+events_unbound12:30:151
213647996960,7cyclictest229009-21apt-get08:20:111
213643996962,5cyclictest276992-21latency_hist10:50:000
21364399690,66cyclictest0-21swapper/009:27:590
213647996864,3cyclictest252849-21kworker/u8:2+events_unbound09:45:251
213647996863,4cyclictest294539-21kworker/u8:3+events_unbound11:46:001
213647996863,4cyclictest281809-21kworker/u8:0+events_unbound11:15:021
213643996862,5cyclictest259259-21kworker/u8:1+flush-179:010:20:150
213647996761,4cyclictest225297-21apt-get08:10:111
213647996757,8cyclictest296345-21apt-get11:50:111
213643996761,4cyclictest231980-21kworker/u8:3+flush-179:008:30:220
213643996755,9cyclictest266-21systemd-journal12:00:010
213647996661,4cyclictest297707-21kworker/u8:0+events_unbound12:05:191
213647996658,6cyclictest304070-21kworker/u8:2+flush-179:012:39:551
213647996657,6cyclictest252866-21latency_hist09:35:011
213643996658,6cyclictest223182-21latency_hist08:00:000
213647996561,3cyclictest281809-21kworker/u8:0+events_unbound11:10:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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