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2025-12-08 - 02:33
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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 Sun Dec 07, 2025 12:45:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18399272211168,32sleep30-21swapper/307:05:453
18399622209185,14sleep20-21swapper/207:06:082
18402342197172,14sleep10-21swapper/107:09:091
18401522193165,18sleep00-21swapper/007:08:040
212099221580,1sleep13125725-21ThreadPoolForeg11:40:041
1840506997875,2cyclictest1847589-21kworker/u8:4+events_unbound08:05:352
1840506997333,39cyclictest1939435-21snmp_wlanswitch08:45:012
1840506996864,3cyclictest1847589-21kworker/u8:4+events_unbound09:05:362
1840509996157,2cyclictest2126066-21snmp_ryswitch2.11:45:023
1840506996056,3cyclictest1782473-21kworker/u8:0+events_unbound07:25:312
184049899594,11cyclictest247560-21ThreadPoolForeg07:45:010
1840506995854,3cyclictest1971935-21kworker/u8:6+flush-179:009:20:292
1840506995853,3cyclictest1985004-21kworker/u8:1+events_unbound10:15:292
1840506995853,3cyclictest1985004-21kworker/u8:1+events_unbound10:15:292
1840506995853,3cyclictest1971935-21kworker/u8:6+events_unbound09:40:132
1840498995851,6cyclictest247561-21ThreadPoolForeg12:05:390
1840506995752,3cyclictest1845371-21kworker/u8:3+flush-179:007:30:162
1840506995735,21cyclictest3125724-21ThreadPoolForeg10:34:302
1840506995652,3cyclictest1949290-21kworker/u8:1+flush-179:008:55:152
1840506995652,2cyclictest2119819-21kworker/u8:4+flush-179:011:45:192
1840498995650,4cyclictest2161301-21kworker/u8:2+flush-179:012:20:300
1840498995650,4cyclictest2161301-21kworker/u8:2+flush-179:012:20:300
1840506995551,3cyclictest2092490-21kworker/u8:5+flush-179:011:15:102
1840506995551,3cyclictest2073979-21kworker/u8:0+events_unbound11:05:132
1840506995551,3cyclictest2063085-21kworker/u8:4+flush-179:010:45:262
1840506995550,3cyclictest1949474-21kworker/u8:3+events_unbound09:01:042
1840506995538,16cyclictest2098763-21kworker/u8:1+flush-179:011:25:412
1840503995549,5cyclictest3125688-21Chrome_ChildIOT07:50:251
1840503995549,5cyclictest3125688-21Chrome_ChildIOT07:50:251
1840506995449,4cyclictest2099480-21/usr/share/muni11:20:022
1840506995449,4cyclictest2073979-21kworker/u8:0+events_unbound12:00:422
1840509995349,3cyclictest2098763-21kworker/u8:1+flush-179:011:25:103
1840509995347,5cyclictest3125725-21ThreadPoolForeg08:28:303
1840506995350,2cyclictest2146411-21kworker/u8:1+flush-179:012:10:342
1840506995350,2cyclictest2109367-21kworker/u8:3+flush-179:011:40:222
1840506995349,3cyclictest2161301-21kworker/u8:2+flush-179:012:20:392
1840506995349,3cyclictest2161301-21kworker/u8:2+flush-179:012:20:392
1840506995346,5cyclictest247560-21ThreadPoolForeg09:15:132
1840506995248,3cyclictest1923148-21kworker/u8:2+flush-179:008:25:382
1840503995240,11cyclictest247560-21ThreadPoolForeg09:25:181
184049899521,49cyclictest3125630-13chrome11:19:590
1840509995147,3cyclictest1959397-31munin-html09:01:193
1840506995148,2cyclictest1847589-21kworker/u8:4+events_unbound08:15:362
1840506995146,3cyclictest2062585-21kworker/u8:2+flush-179:011:30:222
1840506995136,2cyclictest2167535-21kworker/2:2+pm12:30:052
1840509995046,3cyclictest1867174-21/usr/share/muni07:35:043
1840506995046,3cyclictest1847589-21kworker/u8:4+flush-179:007:50:142
1840506995046,3cyclictest1847589-21kworker/u8:4+flush-179:007:50:142
1840506995045,4cyclictest2177692-21/usr/share/muni12:35:092
1840506995045,3cyclictest2052029-21kworker/u8:3+events_unbound10:55:152
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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