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2025-12-12 - 04:46
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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 Thu Dec 11, 2025 12:44:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
36093842216186,19sleep30-21swapper/307:07:303
36093812192159,24sleep00-21swapper/007:07:270
36093632192167,14sleep20-21swapper/207:07:132
36093522185161,14sleep10-21swapper/107:07:041
3609793997357,14cyclictest3816775-21kworker/u8:1+flush-179:010:31:502
3609790996865,2cyclictest3895786-21ThreadPoolForeg11:45:010
3609794996357,5cyclictest247560-21ThreadPoolForeg09:10:343
3609793996359,3cyclictest3651421-21kworker/u8:2+flush-179:008:30:012
3609793996256,4cyclictest3724489-21kworker/u8:3+flush-179:009:10:102
3609793996256,4cyclictest3677366-21kworker/u8:0+events_unbound08:20:292
3609794996155,5cyclictest3125725-21ThreadPoolForeg10:40:013
3609793996156,3cyclictest3708438-21kworker/u8:2+flush-179:010:05:202
3609793996055,4cyclictest3942601-21kworker/u8:0+flush-179:012:40:002
3609793995954,4cyclictest3873935-21kworker/u8:1+flush-179:011:25:402
3609793995954,4cyclictest3833924-21kworker/u8:5+events_unbound10:55:012
37240712580,1sleep20-21swapper/208:55:392
3609793995853,3cyclictest3567397-21kworker/u8:0+events_unbound07:50:192
3609793995852,4cyclictest3709113-21chrome08:45:012
3609793995851,5cyclictest3760346-21kworker/u8:1+flush-179:010:15:312
3609790995852,4cyclictest3708061-21munin-limits08:40:350
3609794995753,3cyclictest3873935-21kworker/u8:1+flush-179:011:35:423
3609793995752,4cyclictest3724489-21kworker/u8:3+events_unbound09:30:112
3609793995651,4cyclictest3775599-21kworker/u8:0+events_unbound09:55:172
3609790995652,3cyclictest3889926-21kworker/u8:3+flush-179:012:05:070
3609793995551,3cyclictest3775599-21kworker/u8:0+flush-179:010:35:022
3609793995551,3cyclictest3651421-21kworker/u8:2+flush-179:008:00:002
3609793995551,3cyclictest3651421-21kworker/u8:2+flush-179:008:00:002
3609793995549,4cyclictest3775599-21kworker/u8:0+flush-179:010:40:082
3609791995450,3cyclictest3942601-21kworker/u8:0+flush-179:012:30:151
3609791995446,6cyclictest3817490-21/usr/share/muni10:30:021
3609790995449,4cyclictest3879702-21kworker/u8:0+flush-179:011:57:060
3609793995349,3cyclictest3708438-21kworker/u8:2+flush-179:009:25:122
3609793995245,5cyclictest3667615-21/usr/share/muni08:05:042
3609793995238,13cyclictest3677366-21kworker/u8:0+flush-179:009:00:162
3609793995147,3cyclictest3654405-21kworker/u8:4+flush-179:008:40:302
3609791995143,5cyclictest3921485-21/usr/share/muni12:10:011
3609794995044,5cyclictest76405-21systemd-journal12:17:023
360979499504,45cyclictest3646767-21chrome07:45:023
3609793995047,2cyclictest3833924-21kworker/u8:5+flush-179:010:50:012
3609793995046,3cyclictest3889926-21kworker/u8:3+flush-179:011:45:172
3609793995046,3cyclictest3760346-21kworker/u8:1+events_unbound10:14:052
3609793995045,4cyclictest3801721-21kworker/u8:3+flush-179:010:20:342
3609793995044,5cyclictest3831714-21kworker/u8:3+flush-179:011:13:222
3609790995041,7cyclictest247515-21ThreadPoolForeg08:20:180
3609793994946,2cyclictest3801721-21kworker/u8:3+events_unbound10:30:012
3609793994946,2cyclictest3599040-21kworker/u8:1+flush-179:007:10:182
3609793994945,3cyclictest3724489-21kworker/u8:3+flush-179:009:15:332
3609793994945,3cyclictest3724489-21kworker/u8:3+flush-179:009:08:012
3609793994945,3cyclictest3630833-21kworker/u8:2+flush-179:007:30:192
3609793994945,3cyclictest3599040-21kworker/u8:1+flush-179:007:20:312
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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