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2026-03-14 - 21:39
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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 Sat Mar 14, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21762949910491,10cyclictest266-21systemd-journal09:40:001
2176294999488,4cyclictest2203004-21latency_hist08:30:001
2176294999387,4cyclictest2269751-21kworker/u8:0+flush-179:012:00:011
2176294999385,5cyclictest2184819-21kworker/u8:0+flush-179:007:45:011
2176294999182,6cyclictest2240118-21latency_hist10:25:011
2176292998974,8cyclictest2213313-21/usr/sbin/munin09:00:220
2176292998883,3cyclictest2184819-21kworker/u8:0+flush-179:007:40:000
2176292998171,7cyclictest2222611-21latency_hist09:30:010
2176292997871,5cyclictest2222647-21kworker/u8:0+flush-179:009:35:240
2176292997869,7cyclictest266-21systemd-journal08:40:010
2176292997869,7cyclictest2173137-21kworker/u8:2+flush-179:007:30:010
2176294997462,9cyclictest2224199-21latency_hist09:35:011
2176292997266,5cyclictest2269751-21kworker/u8:0+flush-179:012:05:010
2176292997060,8cyclictest2190219-21apt-get07:50:110
2176294996856,9cyclictest266-21systemd-journal09:15:011
2176294996762,3cyclictest714-21Xorg12:16:001
2176294996662,3cyclictest2173137-21kworker/u8:2+events_unbound09:00:371
2176294996658,6cyclictest2238535-21latency_hist10:20:011
2176292996558,5cyclictest2243274-21kworker/u8:1+flush-179:010:40:140
2176292996258,2cyclictest0-21swapper/008:17:590
2176294996155,4cyclictest2206458-21latency_hist08:40:011
2176294996151,8cyclictest2253363-21apt-get11:05:121
2176292996055,3cyclictest2211504-21kworker/u8:3+events_unbound09:10:240
2176292996050,8cyclictest2264507-21apt-get11:40:120
2176292995948,9cyclictest2209626-21latency_hist08:50:010
4577091560,12ptp4l441ktimers/307:09:553
2176294995650,2cyclictest714-21Xorg08:18:001
2176294995648,6cyclictest2227629-21/usr/sbin/munin09:45:161
2176296995552,2cyclictest0-21swapper/212:15:592
2176294995547,6cyclictest2281997-21latency_hist12:35:011
2176292995550,4cyclictest2235384-21kworker/u8:3+events_unbound10:55:000
2176299995452,1cyclictest0-21swapper/312:16:003
2176294995445,6cyclictest2179549-21latency_hist07:20:001
2176292995451,2cyclictest0-21swapper/011:49:000
2176292995446,6cyclictest2222647-21kworker/u8:0+events_unbound10:05:000
2176294995346,6cyclictest2162073-21kworker/u8:1+flush-179:007:30:191
2176292995348,3cyclictest2257935-21kworker/u8:1+flush-179:011:25:260
2176294995242,8cyclictest266-21systemd-journal11:40:011
2176294995242,8cyclictest266-21systemd-journal11:40:011
2176294995242,8cyclictest2191562-21apt-get07:54:201
2176294995241,9cyclictest2176911-21diskstats07:10:141
2176294995142,7cyclictest2196896-21apt-get08:10:111
2176292995144,5cyclictest2214918-21apt-get09:05:120
2176292995142,7cyclictest2211504-21kworker/u8:3+flush-179:009:30:160
2176292995040,8cyclictest266-21systemd-journal12:09:590
2176294994844,2cyclictest2201457-21systemd-run08:25:011
2176294994840,6cyclictest2191841-21/usr/sbin/munin07:55:181
2176294994840,6cyclictest2191841-21/usr/sbin/munin07:55:171
2176292994840,6cyclictest2226060-21apt-get09:40:110
2176294994740,5cyclictest266-21systemd-journal10:05:421
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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