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2026-05-14 - 00:32
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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 May 13, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
37263599117107,8cyclictest422681-21latency_hist09:45:010
372635999989,8cyclictest429060-21apt-get10:05:030
372639999381,9cyclictest375972-21/usr/sbin/munin07:20:231
372635999282,7cyclictest439358-21latency_hist10:35:000
372639998680,4cyclictest1213033-21systemd-journal07:50:001
372639998677,6cyclictest460289-21kworker/u8:0+events_unbound11:40:001
372635998475,7cyclictest466685-21latency_hist12:00:020
372635998372,9cyclictest406249-21apt-get08:54:590
372635997969,8cyclictest372777-21/usr/sbin/munin07:10:240
372639997769,5cyclictest451014-21apt-get11:10:131
372635997771,4cyclictest385330-21kworker/u8:2+flush-179:007:50:010
372635997667,7cyclictest1213033-21systemd-journal11:00:000
372639997569,5cyclictest359050-21kworker/u8:2+flush-179:007:30:001
372635997567,6cyclictest382105-21latency_hist07:40:010
372635997362,9cyclictest432732-21apt-get10:15:100
372639997264,5cyclictest444135-21latency_hist10:50:011
372639997060,8cyclictest449429-21apt-get11:05:111
372639996853,14cyclictest448893-21kworker/u8:2+flush-179:011:25:211
372635996859,6cyclictest1213033-21systemd-journal07:24:430
372635996858,8cyclictest436166-21/usr/sbin/munin10:25:230
37264299670,65cyclictest0-21swapper/311:42:003
372639996758,7cyclictest395112-21apt-get08:20:121
372639996758,7cyclictest1213033-21systemd-journal08:15:011
372635996761,4cyclictest409947-21latency_hist09:05:020
372639996558,5cyclictest403065-21latency_hist08:45:011
372635996352,8cyclictest1213033-21systemd-journal08:33:430
372635996152,7cyclictest1213033-21systemd-journal12:20:000
372639996025,26cyclictest0-21swapper/109:00:011
372635996049,9cyclictest447584-21apt-get11:00:130
372639995951,6cyclictest413117-21latency_hist09:15:011
372639995851,5cyclictest453988-21kworker/u8:1+flush-179:011:40:151
372639995847,9cyclictest414981-21apt-get09:20:101
372635995852,5cyclictest439616-21apt-get10:35:100
372639995750,6cyclictest391636-21kworker/u8:0+flush-179:008:20:001
372639995749,6cyclictest374380-21apt-get07:15:111
372635995746,9cyclictest455793-21apt-get11:25:110
372639995645,9cyclictest403321-21apt-get08:45:111
372639995645,9cyclictest403321-21apt-get08:45:101
372635995650,4cyclictest448923-21apt-get11:05:040
372639995547,6cyclictest468319-21kworker/u8:1+events_unbound12:10:001
372639995547,6cyclictest1213033-21systemd-journal10:30:021
372639995535,18cyclictest1213033-21systemd-journal07:54:321
372635995547,7cyclictest375770-21kworker/u8:1+events_unbound08:05:240
372635995547,6cyclictest1213033-21systemd-journal12:40:000
372635995545,8cyclictest1213033-21systemd-journal11:24:560
372639995445,7cyclictest432453-21kworker/u8:1+flush-179:010:35:151
37263999540,51cyclictest714-21Xorg07:40:591
372635995447,5cyclictest432453-21kworker/u8:1+flush-179:010:40:060
372635995446,6cyclictest422664-21kworker/u8:3+flush-179:009:55:140
372635995446,6cyclictest422664-21kworker/u8:3+flush-179:009:55:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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