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2026-01-05 - 03:51
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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 Sun Jan 04, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2066794999080,7cyclictest2163337-21latency_hist12:10:001
2066794998378,4cyclictest2106502-21kworker/u8:0+flush-179:010:40:001
2066794998275,5cyclictest2061884-21kworker/u8:2+flush-179:008:20:001
2066794998069,8cyclictest2166770-21/usr/sbin/munin12:20:231
2066791997971,6cyclictest2156967-21latency_hist11:50:010
2066794997873,3cyclictest2168656-21kworker/u8:3+flush-179:012:30:261
2066794997467,5cyclictest2072160-21kworker/u8:0+flush-179:007:35:001
2066794997362,7cyclictest2116635-21kworker/u8:2+flush-179:009:50:191
2066791996857,8cyclictest2140999-21apt-get11:00:130
2066794996757,7cyclictest2164923-21latency_hist12:15:001
2066791996656,8cyclictest2099320-21/usr/sbin/munin08:50:240
2066791996547,16cyclictest2165466-21diskstats12:15:190
2066791996338,14cyclictest2066670-21latency_hist07:10:020
2066794996154,5cyclictest2132754-21kworker/u8:3+flush-179:010:45:231
2066794996153,6cyclictest2097237-21latency_hist08:45:001
2066791996158,2cyclictest0-21swapper/007:19:590
2066794996057,2cyclictest0-21swapper/110:55:591
2066791996033,17cyclictest2107041-21turbostat09:19:550
2066794995955,2cyclictest714-21Xorg11:34:581
2066794995952,5cyclictest2061884-21kworker/u8:2+events_unbound08:35:231
2066794995952,5cyclictest2061884-21kworker/u8:2+events_unbound08:35:231
2066794995951,6cyclictest2145483-21kworker/u8:0+flush-179:011:20:231
2066794995850,6cyclictest2172892-21latency_hist12:40:021
2066794995847,8cyclictest2121387-21latency_hist10:00:021
2066794995748,7cyclictest2081281-21/usr/sbin/munin07:55:291
2066791995750,6cyclictest2092173-21kworker/u8:1+flush-179:008:35:000
2066791995747,8cyclictest2089279-21apt-get08:20:130
2066795995653,2cyclictest0-21swapper/207:11:002
2066794995650,4cyclictest2097273-21kworker/u8:3+flush-179:008:55:251
2066794995649,5cyclictest2106502-21kworker/u8:0+flush-179:009:20:221
2066791995650,4cyclictest2158590-21kworker/u8:3+events_unbound12:00:170
2066791995650,4cyclictest2086849-21kworker/u8:0+flush-179:008:15:260
2066794995550,4cyclictest2106502-21kworker/u8:0+flush-179:010:25:231
2066794995543,11cyclictest2107069-21kworker/u8:2+flush-179:009:20:001
2066791995539,14cyclictest2106502-21kworker/u8:0+flush-179:010:15:260
2066791995445,7cyclictest2154000-21apt-get11:40:120
2066794995344,6cyclictest2098822-21latency_hist08:50:011
2066800995249,2cyclictest0-21swapper/308:44:593
2066795995249,2cyclictest0-21swapper/211:30:592
2066794995146,4cyclictest2061884-21kworker/u8:2+flush-179:007:10:241
206679199512,47cyclictest2129348-21turbostat10:29:560
2066794995045,4cyclictest2106502-21kworker/u8:0+events_unbound09:40:001
2066794995042,5cyclictest2136500-21kworker/u8:2+flush-179:010:50:221
2066794995041,7cyclictest2097273-21kworker/u8:3+events_unbound09:09:591
2066794994942,5cyclictest2077872-21latency_hist07:45:011
2066791994939,8cyclictest2123224-21apt-get10:05:120
2066794994837,8cyclictest2128004-21apt-get10:20:131
4577091470,13ptp4l441ktimers/307:10:013
2066794994741,5cyclictest2061884-21kworker/u8:2+flush-179:007:20:001
2066794994741,4cyclictest2061884-21kworker/u8:2+events_unbound07:20:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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