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2025-12-14 - 11:28
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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 Sat Dec 13, 2025 12:44:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22923352202178,14sleep10-21swapper/107:08:261
22922792198174,14sleep30-21swapper/307:07:443
22921562197167,14sleep20-21swapper/207:06:102
22921702194170,14sleep00-21swapper/007:06:220
2292661991371,122cyclictest2391173-21chrome08:45:010
2292661997961,15cyclictest2329480-21chrome07:45:010
2292670997772,3cyclictest2597233-21kworker/u8:0+events_unbound12:15:112
2292675996360,2cyclictest2253325-21kworker/u8:2+flush-179:007:15:343
2292675996158,2cyclictest2308437-21kworker/u8:1+events_unbound07:35:343
2292675996057,2cyclictest2467145-21kworker/u8:2+events_unbound11:10:353
2292675996057,2cyclictest2467145-21kworker/u8:2+events_unbound11:10:343
2292670995943,3cyclictest3125709-13VizCompositorTh08:45:012
2292675995852,4cyclictest2391168-21CacheThread_Blo08:45:013
2292675995753,3cyclictest2488307-21kworker/u8:1+flush-179:010:20:363
2292675995752,3cyclictest2545367-21kworker/u8:1+events_unbound11:25:293
2292675995752,2cyclictest2308437-21kworker/u8:1+flush-179:008:50:143
2292670995753,3cyclictest2308437-21kworker/u8:1+events_unbound08:50:192
2292665995752,4cyclictest247516-21Chrome_ChildIOT11:20:351
2292661995751,4cyclictest2380666-21latency_hist08:35:020
2292675995653,2cyclictest2612637-21kworker/u8:2+flush-179:012:25:113
2292675995653,2cyclictest2308437-21kworker/u8:1+flush-179:008:00:193
2292675995650,3cyclictest2359481-21kworker/u8:2+flush-179:008:25:193
2292670995652,3cyclictest2581798-21latency_hist11:50:002
2292670995652,3cyclictest2426694-21munin-update09:20:332
2292661995651,3cyclictest2433293-21apt-get09:25:140
2292675995549,4cyclictest3125687-21ThreadPoolForeg07:40:153
2292670995552,2cyclictest2313582-21kworker/u8:2+flush-179:007:47:292
2292670995540,14cyclictest2467145-21kworker/u8:2+flush-179:010:40:292
2292675995451,2cyclictest2494131-21kworker/u8:0+flush-179:010:30:203
2292675995448,3cyclictest2359481-21kworker/u8:2+events_unbound08:30:303
2292675995443,11cyclictest2467145-21kworker/u8:2+flush-179:011:00:303
2292670995450,3cyclictest2253325-21kworker/u8:2+events_unbound07:17:032
2292665995450,3cyclictest2308437-21kworker/u8:1+flush-179:009:45:341
2292665995448,4cyclictest2283663-21kworker/u8:4+flush-179:007:10:271
2292661995451,2cyclictest2467145-21kworker/u8:2+flush-179:010:55:000
2292661995450,3cyclictest2415715-21pvproduced09:05:330
2292675995248,3cyclictest2308437-21kworker/u8:1+events_unbound09:15:303
2292670995249,2cyclictest2488307-21kworker/u8:1+flush-179:010:25:322
2292665995246,4cyclictest2478526-21/usr/share/muni10:10:121
23193762510,1chrt2319373-21apache_accesses07:35:051
2292675995148,2cyclictest2545367-21kworker/u8:1+flush-179:012:00:323
2292675995147,3cyclictest2545367-21kworker/u8:1+events_unbound12:05:203
2292675995147,3cyclictest2380277-21kworker/u8:3+flush-179:009:02:393
2292675995145,2cyclictest2613364-21kworker/u8:4+events_unbound12:30:203
2292670995148,2cyclictest2303483-21kworker/u8:0+events_unbound07:40:232
2292665995147,3cyclictest2467145-21kworker/u8:2+events_unbound11:00:251
2292665995147,2cyclictest2359481-21kworker/u8:2+flush-179:008:35:281
2292665995145,5cyclictest2297865-21/usr/share/muni07:15:111
2292675995046,3cyclictest2550680-21kworker/u8:0+flush-179:011:20:003
2292675995045,3cyclictest2545367-21kworker/u8:1+flush-179:011:30:153
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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