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2025-12-23 - 23:54
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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 Tue Dec 23, 2025 12:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5184382222170,18sleep20-21swapper/207:07:162
5184722212185,18sleep00-21swapper/007:07:430
5184032198177,11sleep10-21swapper/107:06:501
5184122181157,14sleep30-21swapper/307:06:583
74243221440,2sleep1742352-21snmp_wlanswitch10:45:061
518835991071,102cyclictest680663-21chrome09:45:021
518834996850,2cyclictest3125728-13Compositor08:45:020
518839996760,5cyclictest617928-21latency_hist08:45:023
518835996347,15cyclictest793728-21kworker/u8:2+flush-179:011:45:171
518837996248,13cyclictest452818-21kworker/u8:3+flush-179:007:25:062
51883599625,56cyclictest619036-21kworker/u8:3+efi_rts_wq09:22:571
51883499615,55cyclictest628412-21kworker/u8:1+efi_rts_wq09:22:530
518834996144,15cyclictest555868-21chrome07:45:010
518835995953,4cyclictest76405-21systemd-journal07:40:001
518834995954,3cyclictest518998-21/usr/share/muni07:10:110
7306722570,2sleep2247557-21chrome10:30:272
518839995640,2cyclictest618143-13chrome08:45:013
518835995653,2cyclictest518418-21kworker/u8:2+flush-179:008:46:491
518834995549,5cyclictest3125687-21ThreadPoolForeg09:05:310
518839995449,4cyclictest619036-21kworker/u8:3+flush-179:009:40:253
518837995450,3cyclictest716138-21kworker/u8:4+flush-179:011:10:102
518837995449,4cyclictest507945-21kworker/u8:0+flush-179:007:30:162
518834995451,2cyclictest518418-21kworker/u8:2+flush-179:007:50:050
518837995247,3cyclictest659485-21latency_hist09:25:012
518839995148,2cyclictest767766-21kworker/u8:3+flush-179:012:10:203
518837995147,3cyclictest690512-21kworker/u8:1+flush-179:010:55:422
51883599510,39cyclictest247516-21Chrome_ChildIOT11:22:241
51883599510,39cyclictest247516-21Chrome_ChildIOT11:22:241
518834995146,4cyclictest763228-21/usr/share/muni11:05:130
518839995047,3cyclictest716138-21kworker/u8:4+flush-179:011:20:253
518839995047,3cyclictest716138-21kworker/u8:4+flush-179:011:20:253
518835995045,4cyclictest736046-31munin-html10:35:341
518835995042,7cyclictest3752274-1kworker/1:1H+kblockd11:44:581
518835995042,6cyclictest247515-21ThreadPoolForeg08:20:341
51883499500,49cyclictest3125709-13VizCompositorTh09:45:210
518837994946,2cyclictest535693-21kworker/u8:4+flush-179:007:40:352
518837994945,3cyclictest575984-21kworker/u8:1+flush-179:008:40:272
518839994845,2cyclictest619036-21kworker/u8:3+flush-179:009:15:253
518839994844,3cyclictest653944-21kworker/u8:2+flush-179:009:35:333
518839994834,13cyclictest555919-21snmp_wlanpowerc07:45:013
518837994844,3cyclictest839849-21kworker/u8:1+flush-179:012:35:072
518837994841,5cyclictest3125688-21Chrome_ChildIOT09:10:252
518835994842,4cyclictest581968-21/usr/share/muni08:10:081
518834994844,3cyclictest596936-21kworker/u8:0+flush-179:008:55:010
518834994843,4cyclictest695956-21kworker/u8:2+flush-179:010:40:290
518839994743,3cyclictest690512-21kworker/u8:1+flush-179:010:23:333
518837994742,4cyclictest670202-21/usr/share/muni09:35:162
518835994743,3cyclictest3752274-1kworker/1:1H+kblockd07:58:301
518835994733,13cyclictest3752274-1kworker/1:1H+kblockd10:30:121
518839994642,3cyclictest768333-21/usr/share/muni11:10:083
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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