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2026-05-11 - 19:03
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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 11, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
320781899111101,7cyclictest3227168-21latency_hist08:10:020
3207818999484,7cyclictest1213033-21systemd-journal09:55:000
3207818999182,6cyclictest3230357-21latency_hist08:20:000
3207823999081,7cyclictest3285266-21latency_hist11:10:011
3207823998578,5cyclictest3252940-21kworker/u8:3+flush-179:009:45:131
3207823998573,9cyclictest1213033-21systemd-journal08:20:001
3207823998475,7cyclictest3301190-21apt-get11:58:361
3207823998374,7cyclictest3215995-21latency_hist07:35:011
3207823998074,5cyclictest3227406-21kworker/u8:1+flush-179:008:45:001
3207823997969,8cyclictest3272507-21/usr/sbin/munin10:30:251
3207823997872,5cyclictest3302817-21kworker/u8:1+flush-179:012:19:551
3207818997869,7cyclictest3219472-21apt-get07:45:120
3207818997869,6cyclictest3240147-21kworker/u8:0+flush-179:009:00:160
3207823997569,4cyclictest3242295-21kworker/u8:1+flush-179:009:05:161
3207823997564,9cyclictest3283421-21latency_hist11:05:011
3207823997466,6cyclictest3212569-21apt-get07:25:001
3207823997464,8cyclictest1213033-21systemd-journal07:40:011
3207823997360,11cyclictest3240147-21kworker/u8:0+flush-179:008:55:171
3207823997265,4cyclictest3294800-21kworker/u8:2+flush-179:011:45:161
3207818997264,6cyclictest3278620-21kworker/u8:1+flush-179:010:55:010
3207818997263,6cyclictest1213033-21systemd-journal10:20:010
3207823997165,4cyclictest3248155-21kworker/u8:0+events_unbound09:25:141
3207823997058,10cyclictest3252940-21kworker/u8:3+events_unbound10:20:001
3207823996963,2cyclictest0-21swapper/112:14:591
3207818996961,6cyclictest3295376-21diskstats11:40:170
3207818996958,9cyclictest3302817-21kworker/u8:1+flush-179:012:15:000
3207818996860,4cyclictest3299628-21kworker/u8:3+flush-179:011:55:210
3207823996758,7cyclictest3251324-21latency_hist09:25:011
3207818996759,5cyclictest3194857-21kworker/u8:2+flush-179:007:20:230
3207823996660,4cyclictest3228799-21kworker/u8:3+flush-179:008:45:231
3207818996658,5cyclictest3299574-21kworker/u8:0+flush-179:012:00:230
3207818996657,6cyclictest3214406-21latency_hist07:30:010
3207823996459,3cyclictest3235369-21kworker/u8:0+flush-179:008:35:211
3207818996454,7cyclictest3302817-21kworker/u8:1+flush-179:012:15:220
3207823996360,2cyclictest0-21swapper/109:02:001
3207823996357,5cyclictest3257669-21kworker/u8:0+flush-179:009:50:181
3207823996349,10cyclictest3221036-21kworker/u8:2+flush-179:008:00:131
3207818996357,4cyclictest3282068-21kworker/u8:3+flush-179:011:15:180
3207818996351,10cyclictest3214665-21apt-get07:30:120
3207824996258,3cyclictest0-21swapper/212:27:592
3207823996255,5cyclictest3217594-21kworker/u8:0+flush-179:007:55:191
3207818996255,5cyclictest3302817-21kworker/u8:1+flush-179:012:25:000
3207818996255,5cyclictest3252940-21kworker/u8:3+flush-179:010:20:230
3207818996254,6cyclictest3257669-21kworker/u8:0+flush-179:009:50:000
3207823996155,4cyclictest3285522-21apt-get11:10:121
3207823996155,4cyclictest3228799-21kworker/u8:3+flush-179:008:20:161
3207823996152,7cyclictest510-21rs:main1
3207818996153,6cyclictest3291894-21kworker/u8:0+flush-179:011:35:230
3207828996058,1cyclictest0-21swapper/312:27:593
320782899591,52cyclictest67-21kworker/3:1+events11:09:563
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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