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2025-12-28 - 22:06
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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 28, 2025 12:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
38393582206178,18sleep00-21swapper/007:08:510
38392132194171,13sleep30-21swapper/307:07:063
38393912181157,14sleep10-21swapper/107:09:171
38391732175151,14sleep20-21swapper/207:06:362
3839668998239,41cyclictest3125728-13Compositor08:45:033
383966699658,56cyclictest4113686-21kworker/u8:0+efi_rts_wq11:45:472
3839662996211,50cyclictest4113686-21kworker/u8:0+efi_rts_wq11:45:471
3839657996255,5cyclictest3866327-21/usr/share/muni07:35:090
3839666995650,4cyclictest4037385-21/usr/share/muni10:20:102
3839666995650,4cyclictest3870793-21kworker/u8:0+flush-179:010:15:112
3839666995551,3cyclictest3870793-21kworker/u8:0+flush-179:009:35:322
3839666995530,21cyclictest3844681-21kworker/2:2+pm07:24:512
3839666995446,6cyclictest4016788-21/usr/share/muni10:00:152
38443682530,2sleep13125708-13Chrome_ChildIOT07:11:531
3839662995346,5cyclictest4073326-21/usr/share/muni10:55:011
3839668995245,5cyclictest247561-21ThreadPoolForeg08:25:083
3839657995246,5cyclictest4083294-21latency_hist11:05:000
3839657995046,3cyclictest3841056-21apt-get07:10:130
3839657995045,4cyclictest4161305-21/usr/share/muni12:20:170
3839668994947,1cyclictest4124207-21munin-update11:45:023
3839666994945,3cyclictest3963723-21kworker/u8:1+flush-179:009:25:342
3839666994935,2cyclictest3844681-21kworker/2:2+pm07:28:532
3839668994845,2cyclictest3944692-21kworker/u8:3+flush-179:009:05:343
3839668994842,4cyclictest3995421-21/usr/share/muni09:40:103
3839666994834,12cyclictest3865800-21kworker/2:0+pm07:35:032
3839662994844,3cyclictest4171774-21/usr/share/muni12:30:011
3839662994832,15cyclictest3952910-21munin-limits08:55:341
3839668994738,6cyclictest247515-21ThreadPoolForeg08:55:353
3839666994740,5cyclictest3876637-21CompositorTileW07:45:092
3839666994737,6cyclictest4057580-21kworker/2:0+pm10:40:582
3839662994743,3cyclictest4109141-21/usr/share/muni11:30:211
3839668994641,4cyclictest4078446-21/usr/share/muni11:00:153
3839666994642,3cyclictest4171300-21kworker/u8:0+flush-179:012:30:362
3839657994643,2cyclictest4043986-21kworker/u8:2+flush-179:010:25:180
3839657994643,2cyclictest3963723-21kworker/u8:1+flush-179:009:45:270
3839657994633,12cyclictest4026851-1kworker/0:1H+kblockd10:45:200
3839668994540,4cyclictest247560-21ThreadPoolForeg09:28:083
3839668994538,5cyclictest3932406-31munin-graph08:35:493
3839668994533,11cyclictest3945690-21/usr/sbin/munin08:50:203
3839668994531,12cyclictest3125728-13Compositor07:29:493
3839666994541,3cyclictest3927604-21kworker/u8:3+flush-179:008:35:352
3839666994538,5cyclictest4012847-21ntpq09:55:172
3839666994534,6cyclictest3916769-31munin-html08:20:352
3839666994513,31cyclictest3125627-21ChromeDriver00:55:192
3839666994513,31cyclictest3125627-21ChromeDriver00:55:192
3839662994541,3cyclictest4103097-21munin-limits11:20:341
3839662994541,3cyclictest3963723-21kworker/u8:1+flush-179:009:40:091
3839662994540,4cyclictest3886363-31munin-html07:50:361
3839662994540,4cyclictest3886363-31munin-html07:50:361
3839662994538,5cyclictest4016777-21/usr/share/muni10:00:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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