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2025-12-12 - 16:54
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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
Characteristics of the 50 highest latencies:
System rackbslot1.osadl.org (updated Fri Dec 12, 2025 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9008532212184,19sleep20-21swapper/207:06:532
9009872202179,13sleep30-21swapper/307:08:353
9009012201172,19sleep00-21swapper/007:07:310
9008162190166,14sleep10-21swapper/107:06:281
901305997660,3cyclictest1061115-21CacheThread_Blo09:45:022
901308996965,3cyclictest1201120-21kworker/u8:2+flush-179:012:26:573
901302996750,5cyclictest1093178-21ntpq10:15:150
901308996649,14cyclictest247563-13Compositor11:45:003
901308996649,14cyclictest247563-13Compositor11:45:003
901302996460,3cyclictest1170452-21kworker/u8:5+flush-179:011:48:310
901308996358,3cyclictest1122767-21kworker/u8:2+events_unbound10:51:553
901305996359,3cyclictest1220974-21latency_hist12:35:012
901304996056,3cyclictest1132403-21kworker/u8:3+flush-179:012:31:001
901302996056,3cyclictest900773-21kworker/u8:0+flush-179:008:20:100
901308995956,2cyclictest999423-21snmp_ryswitch2.08:45:013
901308995956,2cyclictest900773-21kworker/u8:0+flush-179:008:35:103
901308995955,3cyclictest905287-21kworker/u8:4+events_unbound08:05:203
901308995955,3cyclictest1107342-21kworker/u8:1+flush-179:010:30:133
901308995753,3cyclictest1081112-21kworker/u8:5+flush-179:010:10:323
901308995752,3cyclictest1151980-21kworker/u8:1+flush-179:011:45:233
901305995754,2cyclictest900773-21kworker/u8:0+flush-179:009:15:312
901302995753,3cyclictest1050292-21kworker/u8:0+flush-179:009:45:130
901308995652,3cyclictest1050292-21kworker/u8:0+events_unbound10:20:223
901308995550,4cyclictest988653-21kworker/u8:3+flush-179:009:35:123
901305995551,3cyclictest1204607-21latency_hist12:15:002
901304995551,3cyclictest993995-21munin-update08:40:351
901302995550,4cyclictest1107342-21kworker/u8:1+events_unbound10:33:440
901302995538,15cyclictest247557-21chrome11:45:010
901302995538,15cyclictest247557-21chrome11:45:010
90130299550,54cyclictest3125728-13Compositor07:10:100
901308995450,3cyclictest1151980-21kworker/u8:1+flush-179:011:20:243
901308995450,3cyclictest1066568-21kworker/u8:1+flush-179:009:50:113
901308995449,4cyclictest1132403-21kworker/u8:3+flush-179:011:09:073
901302995450,3cyclictest1045198-21kworker/u8:4+flush-179:010:29:400
901302995449,4cyclictest978578-21kworker/u8:1+flush-179:008:35:270
9124232530,1chrt912382-21munin-update07:20:003
901308995349,3cyclictest1122878-21latency_hist10:45:023
901308995348,4cyclictest1132403-21kworker/u8:3+events_unbound10:56:353
901302995349,3cyclictest1091454-21kworker/u8:2+flush-179:010:20:190
901308995249,2cyclictest905287-21kworker/u8:4+events_unbound07:35:303
901308995249,2cyclictest1151980-21kworker/u8:1+events_unbound12:00:093
901308995247,4cyclictest1151980-21kworker/u8:1+flush-179:011:50:093
901305995248,3cyclictest1045198-21kworker/u8:4+flush-179:010:45:182
901302995247,3cyclictest1122767-21kworker/u8:2+events_unbound10:49:540
901302995246,4cyclictest1201120-21kworker/u8:2+flush-179:012:12:470
901302995245,3cyclictest978578-21kworker/u8:1+flush-179:008:45:200
901308995147,3cyclictest978578-21kworker/u8:1+flush-179:009:25:363
901308995147,3cyclictest247557-21chrome10:45:023
901302995147,2cyclictest1045198-21kworker/u8:4+flush-179:009:50:260
901302995145,5cyclictest1045198-21kworker/u8:4+flush-179:010:10:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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