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2026-06-21 - 17:22
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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 Jun 21, 2026 12:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
214036499133125,5cyclictest2168282-21kworker/u8:2+events_unbound08:35:001
214036499126115,9cyclictest1213033-21systemd-journal11:00:001
214036499120111,6cyclictest2232479-21latency_hist11:55:011
214036499118112,4cyclictest2215531-21kworker/u8:1+events_unbound11:10:011
214036499115109,4cyclictest2203054-21kworker/u8:0+events_unbound10:55:011
214036499115109,4cyclictest2203054-21kworker/u8:0+events_unbound10:55:011
214036499115108,5cyclictest2203054-21kworker/u8:0+events_unbound11:15:001
21403629911396,12cyclictest1213033-21systemd-journal09:25:220
214036499112103,7cyclictest2145265-21kworker/u8:2+events_unbound07:35:011
214036499108100,6cyclictest2177847-21kworker/u8:1+flush-179:009:25:001
21403649910796,4cyclictest2145265-21kworker/u8:2+events_unbound07:40:221
21403649910788,5cyclictest2152399-21kworker/u8:3+events_unbound08:05:001
21403649910599,4cyclictest2141491-21kworker/u8:3+flush-179:007:25:011
21403649910592,5cyclictest2235709-21kworker/u8:2+events_unbound12:25:241
21403649910499,4cyclictest2136587-21kworker/u8:1+events_unbound07:10:241
21403649910497,4cyclictest2177847-21kworker/u8:1+events_unbound09:10:231
21403649910489,12cyclictest1213033-21systemd-journal10:29:591
21403649910386,6cyclictest2136587-21kworker/u8:1+flush-179:007:20:011
21403649910195,4cyclictest2203054-21kworker/u8:0+events_unbound11:00:241
21403649910194,5cyclictest2168286-21kworker/u8:3+events_unbound08:55:011
21403649910189,3cyclictest2136587-21kworker/u8:1+flush-179:008:40:261
21403629910193,6cyclictest2145265-21kworker/u8:2+flush-179:007:40:250
21403649910093,5cyclictest2216624-21kworker/u8:3+flush-179:012:35:251
21403649910088,4cyclictest2152399-21kworker/u8:3+flush-179:007:45:221
2140364999994,3cyclictest2216624-21kworker/u8:3+events_unbound11:35:241
2140364999993,5cyclictest2215531-21kworker/u8:1+flush-179:011:20:221
2140362999888,8cyclictest2152378-21/usr/sbin/munin07:45:210
2140362999882,7cyclictest2177847-21kworker/u8:1+flush-179:009:15:010
2140364999791,4cyclictest2136587-21kworker/u8:1+flush-179:008:35:241
2140362999688,6cyclictest2145265-21kworker/u8:2+flush-179:007:35:220
2140364999589,5cyclictest2235709-21kworker/u8:2+events_unbound12:10:011
2140364999589,4cyclictest2216624-21kworker/u8:3+events_unbound11:35:011
2140362999587,6cyclictest2152399-21kworker/u8:3+flush-179:007:50:240
2140364999487,5cyclictest2161911-21kworker/u8:0+flush-179:008:15:201
2140364999486,5cyclictest2207022-21latency_hist10:35:011
2140364999484,8cyclictest2168286-21kworker/u8:3+flush-179:009:05:001
2140364999386,6cyclictest2181021-21kworker/u8:0+flush-179:009:30:241
2140364999383,7cyclictest2216624-21kworker/u8:3+flush-179:011:40:131
2140364999286,4cyclictest2232461-21kworker/u8:0+events_unbound12:00:231
2140364999286,4cyclictest2185219-21kworker/u8:2+flush-179:009:45:221
2140362999282,8cyclictest2165383-21apt-get08:25:110
2140364999184,5cyclictest2216624-21kworker/u8:3+events_unbound12:20:141
2140362999186,4cyclictest2203054-21kworker/u8:0+flush-179:011:05:010
2140364999085,4cyclictest2185219-21kworker/u8:2+flush-179:009:40:211
2140362999082,6cyclictest2203842-21apt-get10:25:100
2140362999079,9cyclictest2240442-21apt-get12:19:590
2140364998983,4cyclictest2203054-21kworker/u8:0+flush-179:010:40:221
2140364998882,3cyclictest2188191-21kworker/u8:1+events_unbound09:50:241
2140364998881,5cyclictest2198571-21kworker/u8:1+events_unbound10:15:001
2140364998778,6cyclictest2193758-21kworker/u8:0+flush-179:009:55:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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