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2026-09-15 - 01:01
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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 Mon Sep 14, 2026 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
212399599144131,10cyclictest2210127-21kworker/u8:3+flush-179:011:45:000
212399699124113,7cyclictest2221271-21kworker/u8:3+flush-179:012:15:001
212399599117107,8cyclictest2205375-21latency_hist11:20:010
212399599117105,9cyclictest2156071-21latency_hist08:50:010
21239969911694,20cyclictest1213033-21systemd-journal09:10:001
212399599115109,4cyclictest2127114-21kworker/u8:0+flush-179:007:19:590
212399699114104,7cyclictest2206970-21latency_hist11:25:011
212399599114104,7cyclictest2177767-21/usr/sbin/munin09:55:250
212399599114100,11cyclictest2185507-21latency_hist10:20:020
21239969911284,24cyclictest2166385-21kworker/u8:2+flush-179:009:50:201
21239959911198,10cyclictest2202731-21diskstats11:10:140
212399599111105,4cyclictest2135179-21kworker/u8:3+flush-179:007:55:170
2123995991101,103cyclictest1-21systemd10:50:010
21239969910996,10cyclictest2140161-21apt-get08:00:121
212399599109103,4cyclictest2210127-21kworker/u8:3+flush-179:011:55:250
212399599109103,4cyclictest2210127-21kworker/u8:3+flush-179:011:55:250
21239969910798,6cyclictest2188972-21kworker/u8:3+flush-179:010:45:201
21239959910698,5cyclictest2210127-21kworker/u8:3+flush-179:011:35:230
21239969910595,7cyclictest2164518-21kworker/u8:1+flush-179:009:20:151
21239959910595,8cyclictest2221271-21kworker/u8:3+flush-179:012:30:200
21239959910496,5cyclictest2144708-21kworker/u8:2+flush-179:008:35:220
21239969910394,6cyclictest2144664-21latency_hist08:15:001
21239959910296,4cyclictest2208075-21kworker/u8:0+events_unbound12:10:010
21239959910294,5cyclictest2135179-21kworker/u8:3+events_unbound08:00:140
21239969910089,8cyclictest2183896-21latency_hist10:15:011
21239959910093,4cyclictest2144708-21kworker/u8:2+flush-179:008:15:220
2123996999887,8cyclictest2162699-21apt-get09:10:001
2123996999787,8cyclictest2133799-21apt-get07:40:111
2124000999588,5cyclictest2230839-21turbostat12:40:003
2123995999586,7cyclictest2127114-21kworker/u8:0+flush-179:007:30:200
2123995999488,4cyclictest2172556-21kworker/u8:0+flush-179:009:40:260
2123995999487,6cyclictest2205424-21kworker/u8:1+flush-179:011:30:200
2123995999486,6cyclictest2164518-21kworker/u8:1+flush-179:009:15:150
2123995999386,5cyclictest2229225-21kworker/u8:0+events_unbound12:40:010
2123995999285,5cyclictest2195289-21kworker/u8:2+flush-179:011:05:210
2123996999177,12cyclictest1213033-21systemd-journal09:35:001
2123996999082,5cyclictest2167715-21kworker/u8:3+flush-179:009:35:261
2123996999067,20cyclictest1213033-21systemd-journal10:29:561
2123995999082,5cyclictest2151012-21kworker/u8:1+flush-179:008:55:240
2123995999082,5cyclictest2151012-21kworker/u8:1+flush-179:008:55:240
2123996998979,8cyclictest2197878-21kworker/u8:0+flush-179:011:05:001
2123996998977,10cyclictest2174123-21kworker/u8:1+events_unbound10:00:011
2123995998982,5cyclictest2159775-21apt-get09:00:120
2123996998883,3cyclictest1489062-21kworker/u8:4+flush-179:007:15:171
2123995998878,8cyclictest2172515-21latency_hist09:40:010
2123996998776,8cyclictest2208075-21kworker/u8:0+flush-179:012:05:151
2123995998681,3cyclictest2188972-21kworker/u8:3+flush-179:010:35:250
2123995998678,5cyclictest2188972-21kworker/u8:3+flush-179:010:50:160
2123996998578,4cyclictest2177327-21kworker/u8:3+flush-179:010:05:201
2123996998574,8cyclictest2218369-21apt-get12:00:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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