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2026-03-22 - 18:06
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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 Sun Mar 22, 2026 12:44:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
339717499117109,6cyclictest3408641-21kworker/u8:1+events_unbound07:45:011
33971749911496,16cyclictest3491939-21kworker/u8:0+events_unbound12:25:011
33971749911197,10cyclictest3434220-21latency_hist09:05:021
339717499110102,6cyclictest3491939-21kworker/u8:0+flush-179:012:20:011
33971749910799,6cyclictest3402149-21kworker/u8:3+events_unbound07:40:011
33971749910391,9cyclictest3444020-21latency_hist09:35:011
33971749910295,5cyclictest3491939-21kworker/u8:0+flush-179:012:00:001
33971749910289,10cyclictest3447727-21latency_hist09:45:011
33971749910289,10cyclictest3447727-21latency_hist09:45:011
33971749910190,7cyclictest3412597-21kworker/u8:0+events_unbound08:20:001
3397174999993,4cyclictest3471061-21kworker/u8:3+flush-179:011:10:251
3397172999888,7cyclictest3469441-21latency_hist10:50:010
3397174999789,6cyclictest3456857-21kworker/u8:1+flush-179:010:20:241
3397172999685,8cyclictest3402114-21latency_hist07:25:010
3397174999386,4cyclictest3483466-21kworker/u8:2+flush-179:011:30:241
3397172999383,8cyclictest3426507-21/usr/sbin/munin08:40:220
3397174999184,4cyclictest3439493-21/usr/sbin/munin09:20:221
3397174999082,6cyclictest3440821-21kworker/u8:1+flush-179:009:40:001
3397174998680,4cyclictest3495392-21kworker/u8:2+events_unbound12:30:001
3397172998480,3cyclictest3394020-21kworker/u8:2+events_unbound07:45:250
3397174998376,5cyclictest3462797-21kworker/u8:0+events_unbound11:30:011
3397174998073,5cyclictest3394020-21kworker/u8:2+flush-179:008:00:011
3397174998071,7cyclictest266-21systemd-journal11:05:001
3397174997973,5cyclictest3468093-21kworker/u8:1+flush-179:010:55:011
3397174997872,4cyclictest3423109-21kworker/u8:2+flush-179:008:55:241
3397174997872,4cyclictest3423109-21kworker/u8:2+flush-179:008:55:241
3397174997870,5cyclictest3423109-21kworker/u8:2+flush-179:008:35:251
3397174997771,4cyclictest3394020-21kworker/u8:2+flush-179:007:20:031
3397172997771,4cyclictest3454349-21latency_hist10:05:010
3397172997767,8cyclictest3484254-21/usr/sbin/munin11:35:230
3397174997670,4cyclictest3483997-21kworker/u8:3+flush-179:011:40:011
3397174997669,4cyclictest3471061-21kworker/u8:3+flush-179:010:55:201
3397174997669,4cyclictest3471061-21kworker/u8:3+flush-179:010:55:191
3397174997568,5cyclictest3491939-21kworker/u8:0+flush-179:012:00:211
3397174997567,5cyclictest3477421-21kworker/u8:1+flush-179:011:40:201
3397172997571,3cyclictest3471061-21kworker/u8:3+events_unbound11:14:550
3397174997470,3cyclictest3412597-21kworker/u8:0+flush-179:008:20:241
3397174997467,6cyclictest3394020-21kworker/u8:2+events_unbound08:05:001
3397174997466,5cyclictest3445946-21kworker/u8:2+flush-179:010:05:191
3397172997341,1cyclictest0-21swapper/012:05:580
3397174997267,4cyclictest3443997-21kworker/u8:0+events_unbound10:10:021
3397174997257,5cyclictest3419940-21kworker/u8:3+flush-179:009:20:001
3397172997266,5cyclictest3461208-21kworker/u8:2+events_unbound10:40:200
3397172997166,4cyclictest3419940-21kworker/u8:3+events_unbound09:19:380
3397172997066,3cyclictest3468093-21kworker/u8:1+events_unbound10:55:000
3397172997060,7cyclictest3400254-21latency_hist07:20:010
3397172997058,9cyclictest3408641-21kworker/u8:1+flush-179:007:55:000
3397172996965,3cyclictest3471061-21kworker/u8:3+events_unbound11:00:000
3397172996965,3cyclictest3471061-21kworker/u8:3+events_unbound10:59:590
3397174996861,4cyclictest3445946-21kworker/u8:2+flush-179:010:00:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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