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2026-01-07 - 16:15
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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 Jan 07, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2104262999589,4cyclictest2171615-21latency_hist10:40:010
2104264999487,6cyclictest2155672-21kworker/u8:0+events_unbound09:55:241
2104262999279,9cyclictest2161380-21kworker/u8:3+flush-179:010:25:220
2104264999080,7cyclictest2187792-21latency_hist11:30:011
2104264998984,4cyclictest2155672-21kworker/u8:0+events_unbound09:50:251
2104262998983,4cyclictest2168464-21kworker/u8:2+events_unbound10:50:010
2104264998676,8cyclictest2173211-21latency_hist10:45:011
2104264998479,4cyclictest2121457-21kworker/u8:1+flush-179:008:10:231
2104264998275,5cyclictest2112387-21kworker/u8:3+flush-179:007:35:251
2104264998075,4cyclictest2137635-21kworker/u8:1+events_unbound08:50:231
2104264997964,13cyclictest2161380-21kworker/u8:3+flush-179:010:10:151
2104264997873,3cyclictest2163637-21kworker/u8:0+events_unbound10:15:201
2104264997873,3cyclictest2163637-21kworker/u8:0+events_unbound10:15:201
2104264997871,5cyclictest2135587-21kworker/u8:0+events_unbound08:55:271
2104264997771,4cyclictest2189416-21kworker/u8:3+events_unbound11:45:251
2104264997765,9cyclictest266-21systemd-journal09:20:001
2104262997770,4cyclictest2135587-21kworker/u8:0+flush-179:008:45:160
2104264997668,6cyclictest2125217-21kworker/u8:2+events_unbound08:40:201
2104264997668,6cyclictest2107445-21kworker/u8:2+events_unbound07:20:031
2104264997667,7cyclictest2160710-21/usr/sbin/munin10:05:261
2104264997661,5cyclictest2178293-21kworker/u8:3+events_unbound11:15:191
2104264997570,4cyclictest2178293-21kworker/u8:3+events_unbound11:20:241
2104264997570,4cyclictest2121457-21kworker/u8:1+events_unbound08:00:241
2104264997566,7cyclictest2201603-21kworker/u8:3+flush-179:012:40:001
2104264997465,7cyclictest2149559-21/usr/sbin/munin09:30:221
2104264997366,5cyclictest2154082-21kworker/u8:1+events_unbound10:20:201
2104264997264,5cyclictest2187770-21kworker/u8:2+events_unbound11:30:141
2104264997166,4cyclictest2122034-21kworker/u8:3+flush-179:008:05:191
2104264997164,4cyclictest2125217-21kworker/u8:2+events_unbound08:35:211
2104264997163,6cyclictest2136579-21latency_hist08:50:001
2104264997162,6cyclictest2168416-21kworker/u8:0+events_unbound10:50:151
2104264997065,4cyclictest2195155-21kworker/u8:0+flush-179:012:00:211
2104264996964,4cyclictest2144571-21kworker/u8:3+flush-179:009:20:221
2104262996963,4cyclictest2147715-21kworker/u8:0+flush-179:009:35:250
2104262996859,7cyclictest2162058-21latency_hist10:10:010
2104264996762,4cyclictest2197312-21kworker/u8:1+flush-179:012:10:011
2104262996759,6cyclictest266-21systemd-journal08:20:000
2104264996558,5cyclictest2176618-21kworker/u8:1+events_unbound11:05:141
2104262996559,4cyclictest2198991-21kworker/u8:2+events_unbound12:10:130
2104262996555,7cyclictest2122000-21latency_hist08:05:010
2104264996458,4cyclictest2106354-21kworker/u8:0+flush-179:008:20:181
2104262996455,6cyclictest2198991-21kworker/u8:2+events_unbound12:35:240
210426299640,62cyclictest2191029-21munin-run11:40:010
2104262996357,4cyclictest2187770-21kworker/u8:2+flush-179:011:30:220
2104264996257,4cyclictest2127445-21kworker/u8:1+events_unbound08:25:191
2104264996256,4cyclictest2106354-21kworker/u8:0+flush-179:007:55:211
2104264996255,6cyclictest2168464-21kworker/u8:2+events_unbound10:55:171
2104262996255,5cyclictest2178287-21kworker/u8:0+flush-179:011:25:210
2104264996156,4cyclictest2195155-21kworker/u8:0+events_unbound12:15:161
2104264996153,6cyclictest2206936-21kworker/u8:1+events_unbound12:30:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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