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2026-04-30 - 17:53
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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 30, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
213278299143115,24cyclictest1213033-21systemd-journal10:44:221
213277999116106,8cyclictest510-21rs:main0
2132782999979,4cyclictest2166946-21kworker/u8:2+flush-179:010:17:191
2132779999588,4cyclictest2134464-21latency_hist07:15:010
2132782999282,7cyclictest2191034-21latency_hist10:15:011
2132779999061,23cyclictest492-21polkitd10:44:220
2132782998676,7cyclictest2237201-21latency_hist12:35:001
2132782998578,5cyclictest2166946-21kworker/u8:2+flush-179:009:50:011
2132779998577,6cyclictest2203701-21latency_hist10:50:010
2132782998478,4cyclictest2210682-21kworker/u8:3+flush-179:011:20:141
2132782998376,5cyclictest2219691-21latency_hist11:40:011
2132782998275,4cyclictest2169161-21kworker/u8:1+events_unbound09:40:241
2132782998073,5cyclictest1213033-21systemd-journal10:05:381
2132782998072,6cyclictest2210134-21latency_hist11:10:011
2132782997872,4cyclictest2152292-21kworker/u8:3+flush-179:008:10:141
2132779997866,9cyclictest1213033-21systemd-journal08:36:420
2132782997570,4cyclictest2169161-21kworker/u8:1+flush-179:009:50:161
2132782997568,4cyclictest2214963-21kworker/u8:1+flush-179:011:55:201
2132782997468,4cyclictest2136041-21kworker/u8:1+events_unbound07:55:131
2132779997468,4cyclictest2169161-21kworker/u8:1+flush-179:009:45:200
2132782997366,4cyclictest2169161-21kworker/u8:1+flush-179:009:20:241
2132782997266,4cyclictest2186271-21latency_hist10:00:001
2132782997266,4cyclictest2169161-21kworker/u8:1+flush-179:009:35:211
2132782997166,4cyclictest2229276-21kworker/u8:3+flush-179:012:24:461
2132782997166,4cyclictest2198860-21/usr/sbin/munin10:35:221
2132782997166,4cyclictest2169161-21kworker/u8:1+events_unbound09:09:591
2132782997166,4cyclictest2115433-21kworker/u8:2+flush-179:007:20:211
213277999700,67cyclictest714-21Xorg11:49:000
2132782996964,3cyclictest2205300-21kworker/u8:3+flush-179:010:55:221
2132779996959,8cyclictest2208803-21apt-get11:05:110
2132782996857,9cyclictest2195446-21apt-get10:25:121
2132779996857,8cyclictest2167148-21/usr/sbin/munin09:00:240
2132782996762,4cyclictest2210682-21kworker/u8:3+flush-179:011:30:001
2132782996758,6cyclictest2213313-21latency_hist11:20:011
2132782996755,9cyclictest1213033-21systemd-journal10:35:001
2132779996761,4cyclictest2193860-21apt-get10:20:090
2132779996757,8cyclictest2164502-21kworker/u8:0+flush-179:009:00:010
2132779996754,10cyclictest2183334-21apt-get09:50:110
2132782996660,4cyclictest2147513-21kworker/u8:2+flush-179:008:15:161
2132782996560,4cyclictest2136041-21kworker/u8:1+flush-179:007:30:221
2132782996559,4cyclictest2132778-21kworker/u8:3+flush-179:007:15:151
2132782996558,4cyclictest2214963-21kworker/u8:1+flush-179:011:45:211
2132779996556,7cyclictest2136041-21kworker/u8:1+flush-179:007:45:150
2132779996556,7cyclictest2136041-21kworker/u8:1+flush-179:007:45:150
2132779996554,9cyclictest2137917-21apt-get07:25:120
2132787996460,2cyclictest0-21swapper/211:34:592
2132782996455,7cyclictest2162124-21apt-get08:40:101
2132789996356,5cyclictest2206963-21turbostat11:00:003
2132779996354,7cyclictest2147513-21kworker/u8:2+events_unbound08:19:590
2132779996354,6cyclictest2214963-21kworker/u8:1+events_unbound11:50:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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