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2026-04-16 - 22:35
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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 16, 2026 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9938949910191,7cyclictest1004985-21latency_hist07:45:000
993899999080,7cyclictest1056965-21latency_hist10:25:011
993899998675,9cyclictest1024088-21latency_hist08:45:011
993894998474,8cyclictest1099645-21latency_hist12:35:010
993899998359,22cyclictest1055369-21latency_hist10:20:011
993899998172,6cyclictest1042114-21latency_hist09:40:021
993899997868,8cyclictest1032301-21latency_hist09:10:011
993899997769,5cyclictest1040516-21latency_hist09:35:011
993899997768,6cyclictest1065178-21latency_hist10:50:011
993899997768,6cyclictest1065178-21latency_hist10:50:011
993894997766,9cyclictest266-21systemd-journal10:30:210
993894997667,7cyclictest995635-21/usr/sbin/munin07:15:240
993899997366,5cyclictest1011350-21latency_hist08:05:011
993894997361,9cyclictest1089847-21apt-get12:05:000
993894997164,5cyclictest1045556-21latency_hist09:50:010
993899997060,8cyclictest266-21systemd-journal11:55:011
993894996861,5cyclictest1076304-21kworker/u8:2+flush-179:012:20:200
993894996456,5cyclictest1-21systemd08:04:590
993899996255,5cyclictest1001767-21latency_hist07:35:011
993894996152,7cyclictest1035715-21kworker/u8:0+events_unbound09:40:230
993899995948,9cyclictest1011609-21apt-get08:05:121
993894995951,6cyclictest1076304-21kworker/u8:2+flush-179:011:30:010
993894995943,13cyclictest997265-21apt-get07:20:100
993905995852,4cyclictest1055367-21turbostat10:20:013
993899995849,8cyclictest981194-21kworker/u8:1+flush-179:007:15:011
993899995849,8cyclictest981194-21kworker/u8:1+flush-179:007:15:011
993899995849,7cyclictest1019564-21apt-get08:30:121
993899995848,8cyclictest1001813-21kworker/u8:3+flush-179:008:20:011
993899995748,7cyclictest1048987-21/usr/sbin/munin10:00:221
993894995749,6cyclictest1083214-21latency_hist11:45:010
993899995634,20cyclictest1076587-21latency_hist11:25:011
993894995649,5cyclictest1094874-21latency_hist12:20:020
993894995649,5cyclictest1094874-21latency_hist12:20:020
993894995546,8cyclictest1035715-21kworker/u8:0+flush-179:009:30:150
993903995451,2cyclictest0-21swapper/210:20:002
993903995423,2cyclictest0-21swapper/212:02:002
993894995447,5cyclictest1051977-21kworker/u8:2+flush-179:010:15:160
993899995346,5cyclictest1098312-21apt-get12:30:111
993894995247,4cyclictest1062040-21kworker/u8:3+flush-179:011:00:260
993899995142,7cyclictest1071800-21apt-get11:10:111
993894995145,4cyclictest1062040-21kworker/u8:3+flush-179:011:05:260
993894995141,8cyclictest1076304-21kworker/u8:2+flush-179:011:35:230
993899995040,8cyclictest1076304-21kworker/u8:2+flush-179:012:00:011
993899995033,16cyclictest1004981-21cron07:45:001
993894995040,8cyclictest981194-21kworker/u8:1+flush-179:007:50:220
993894995040,8cyclictest1079771-21apt-get11:35:010
993894995040,8cyclictest1034383-21/usr/sbin/munin09:15:230
993899994943,5cyclictest1043724-21apt-get09:45:001
993899994943,4cyclictest1093528-21apt-get12:15:111
993899994943,4cyclictest1093528-21apt-get12:15:101
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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