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2026-04-17 - 23:56
OSADL QA Farm

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #e, slot #6

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click here to display the system's profile data or here to proceed to next system.
Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackeslot6.osadl.org (updated Fri Apr 17, 2026 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
378607699110102,6cyclictest3860076-21latency_hist11:00:010
378607699110102,6cyclictest3860076-21latency_hist11:00:010
3786080999889,7cyclictest3807005-21latency_hist08:15:011
3786076999383,7cyclictest3844156-21latency_hist10:10:010
3786080998873,13cyclictest3845777-21kworker/u8:3+flush-179:010:19:591
3786076998678,6cyclictest3797206-21latency_hist07:45:000
3786076998372,8cyclictest1213033-21systemd-journal10:30:000
3786080998274,6cyclictest3836199-21latency_hist09:45:011
3786080998274,6cyclictest3836199-21latency_hist09:45:001
3786080998072,6cyclictest1213033-21systemd-journal07:30:221
3786076997971,5cyclictest3790749-21latency_hist07:25:010
3786076997766,9cyclictest1213033-21systemd-journal08:35:010
3786076997571,3cyclictest3834637-21kworker/u8:4+events_unbound09:49:540
3786076997365,7cyclictest3797443-21kworker/u8:1+events_unbound08:05:010
3786076997263,7cyclictest3839372-21latency_hist09:55:010
3786080997165,4cyclictest3887931-21apt-get12:25:021
3786076997167,3cyclictest3810236-21kworker/u8:0+events_unbound08:27:240
3786076997167,3cyclictest3790985-21kworker/u8:2+events_unbound07:49:560
3786076997166,4cyclictest3815047-21kworker/u8:1+events_unbound08:53:440
3786080997061,6cyclictest3829615-21kworker/u8:3+flush-179:009:35:161
3786076997066,3cyclictest3879740-21kworker/u8:1+events_unbound12:34:550
3786076997066,3cyclictest3815047-21kworker/u8:1+events_unbound09:09:550
3786076997066,3cyclictest3815047-21kworker/u8:1+events_unbound08:59:570
3786080996962,5cyclictest3845742-21latency_hist10:15:011
3786076996965,3cyclictest3887391-21kworker/u8:0+events_unbound12:25:240
3786076996965,3cyclictest3790985-21kworker/u8:2+events_unbound07:26:240
3786076996964,4cyclictest3837766-21kworker/u8:0+events_unbound10:03:560
3786076996962,5cyclictest3868040-21latency_hist11:25:020
3786076996864,3cyclictest3852089-21kworker/u8:2+events_unbound11:34:550
3786076996863,4cyclictest3834637-21kworker/u8:4+events_unbound09:59:560
3786076996763,3cyclictest3837766-21kworker/u8:0+events_unbound10:24:550
3786076996763,3cyclictest3823237-21kworker/u8:2+events_unbound09:16:230
3786076996763,3cyclictest3823237-21kworker/u8:2+events_unbound09:16:220
3786080996658,5cyclictest3855304-21latency_hist10:45:011
3786080996656,8cyclictest3821599-21latency_hist09:00:011
3786076996662,3cyclictest3852089-21kworker/u8:2+events_unbound12:07:240
3786076996655,4cyclictest3781206-21kworker/u8:3+events_unbound07:35:030
3786080996556,7cyclictest3883136-21apt-get12:10:101
3786076996556,7cyclictest1213033-21systemd-journal12:25:000
3786084996462,1cyclictest0-21swapper/312:16:593
3786076996460,3cyclictest3790985-21kworker/u8:2+events_unbound08:24:220
3786080996355,6cyclictest3891357-21latency_hist12:35:011
3786076996359,3cyclictest3863292-21kworker/u8:3+events_unbound11:18:230
3786076996358,4cyclictest3879219-21kworker/u8:0+events_unbound11:59:160
3786076996354,6cyclictest3826372-21latency_hist09:15:010
3786080996253,7cyclictest3790985-21kworker/u8:2+flush-179:008:20:001
3786076996258,3cyclictest3823237-21kworker/u8:2+events_unbound09:37:220
3786076996258,3cyclictest3797443-21kworker/u8:1+events_unbound07:51:240
3786076996157,3cyclictest3871197-21kworker/u8:4+events_unbound11:43:220
3786076996157,3cyclictest3852089-21kworker/u8:2+events_unbound11:11:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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