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2026-04-01 - 05:25
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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 Wed Apr 01, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3041439910588,15cyclictest346242-21apt-get21:20:120
304146999990,7cyclictest397965-40mandb00:00:011
304143999384,6cyclictest378568-21latency_hist23:00:020
304143999086,2cyclictest363773-21kworker/u8:3+events_unbound22:20:030
304146998576,6cyclictest394748-21latency_hist23:50:011
304143998272,7cyclictest383360-21apt-get23:15:000
304143998071,7cyclictest388620-21/usr/sbin/munin23:30:230
304146997972,4cyclictest369074-21kworker/u8:3+flush-179:022:45:201
304143997969,8cyclictest325285-21latency_hist20:15:010
304143997872,4cyclictest384669-21kworker/u8:2+events_unbound23:15:240
304143997867,9cyclictest400105-21apt-get00:10:070
304143997468,4cyclictest304062-21kworker/u8:2+flush-179:019:15:000
304143997365,6cyclictest362399-21apt-get22:10:110
304146997262,7cyclictest266-21systemd-journal23:32:051
304143997263,7cyclictest266-21systemd-journal20:25:010
304146997163,6cyclictest374470-21kworker/u8:0+flush-179:023:10:001
304146997063,4cyclictest324715-21kworker/u8:3+events_unbound20:50:241
304146996961,5cyclictest389955-21kworker/u8:3+flush-179:023:35:201
304146996959,7cyclictest358748-21kworker/u8:0+flush-179:022:05:221
304143996962,5cyclictest389955-21kworker/u8:3+flush-179:000:00:010
304146996862,4cyclictest365834-21kworker/u8:0+flush-179:022:24:561
304146996859,6cyclictest310948-21/usr/sbin/munin19:30:241
304143996859,7cyclictest385467-21apt-get23:20:120
30414399680,2cyclictest714-21Xorg19:22:590
304146996660,4cyclictest304062-21kworker/u8:2+events_unbound19:15:251
304146996658,5cyclictest307523-21kworker/u8:1+flush-179:019:35:221
304146996656,7cyclictest405387-21/usr/sbin/munin00:25:251
304146996456,6cyclictest350744-21latency_hist21:35:011
304146996358,3cyclictest369029-21latency_hist22:30:001
304143996357,4cyclictest330321-21apt-get20:30:110
304143996355,6cyclictest266-21systemd-journal00:20:000
304146996259,2cyclictest0-21swapper/120:10:581
304143996257,3cyclictest369074-21kworker/u8:3+flush-179:022:40:210
304146996153,7cyclictest333293-21kworker/u8:1+events_unbound21:55:001
304146996151,7cyclictest374470-21kworker/u8:0+events_unbound22:50:221
304146996148,7cyclictest374470-21kworker/u8:0+events_unbound23:10:151
304143996155,4cyclictest393420-21apt-get23:45:100
304143996154,4cyclictest369074-21kworker/u8:3+flush-179:022:45:160
304143996152,7cyclictest266-21systemd-journal19:50:000
304146995952,5cyclictest385203-21latency_hist23:20:011
304143995955,3cyclictest378542-21kworker/u8:1+flush-179:023:00:200
304143995953,4cyclictest317055-21kworker/u8:1+events_unbound20:00:230
304143995952,5cyclictest324715-21kworker/u8:3+flush-179:020:50:200
304143995952,5cyclictest266-21systemd-journal00:04:000
304143995851,5cyclictest409935-21latency_hist00:40:010
304143995849,6cyclictest361814-21kworker/u8:1+events_unbound22:15:120
304146995747,8cyclictest358968-21apt-get22:00:121
304146995744,10cyclictest309083-21apt-get19:23:571
304146995650,5cyclictest345945-21kworker/u8:2+flush-179:021:25:001
304146995648,6cyclictest361814-21kworker/u8:1+events_unbound22:10:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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