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2026-07-26 - 21:40
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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 Sun Jul 26, 2026 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
51126899137125,10cyclictest602097-21apt-get11:50:001
51126899132121,8cyclictest522756-21latency_hist07:45:011
51126399130122,6cyclictest552155-21kworker/u8:0+flush-179:009:25:010
51126399129123,4cyclictest555861-21kworker/u8:2+events_unbound09:30:000
51126399128123,3cyclictest597339-21kworker/u8:3+flush-179:011:40:270
51126899126114,8cyclictest532811-21latency_hist08:15:011
51126899125108,13cyclictest1213033-21systemd-journal11:20:001
51126899125107,15cyclictest562026-21kworker/u8:2+flush-179:010:00:261
51126899124116,6cyclictest534408-21apt-get08:20:031
51126399124116,6cyclictest495195-21kworker/u8:2+flush-179:007:25:150
51126399123117,4cyclictest568391-21kworker/u8:1+flush-179:010:15:250
51126399122112,7cyclictest603927-21latency_hist11:55:010
51126399121114,5cyclictest588555-21kworker/u8:0+flush-179:011:20:250
51126399121114,4cyclictest529417-21kworker/u8:3+events_unbound08:25:250
51126399121112,7cyclictest1213033-21systemd-journal09:10:010
51126399119113,5cyclictest552155-21kworker/u8:0+flush-179:009:45:240
51126399118110,6cyclictest529417-21kworker/u8:3+flush-179:008:35:000
51126899117106,8cyclictest1213033-21systemd-journal07:15:011
51126399117112,4cyclictest588555-21kworker/u8:0+flush-179:011:15:260
51126399117112,4cyclictest552155-21kworker/u8:0+events_unbound09:35:020
51126399117107,7cyclictest562026-21kworker/u8:2+events_unbound10:10:140
51126399117103,5cyclictest582332-21kworker/u8:1+events_unbound10:50:010
51126399115108,5cyclictest573157-21kworker/u8:2+flush-179:010:20:250
51126899114101,9cyclictest552155-21kworker/u8:0+flush-179:009:40:231
51126899112100,8cyclictest595695-21kworker/u8:1+flush-179:011:40:171
5112639911299,10cyclictest1213033-21systemd-journal12:30:000
51126399112106,4cyclictest529417-21kworker/u8:3+events_unbound08:20:240
51126399112102,8cyclictest552155-21kworker/u8:0+flush-179:010:40:000
51126399112102,7cyclictest615060-21kworker/u8:2+flush-179:012:30:200
51126399112102,7cyclictest553808-21http09:20:010
51126399112101,4cyclictest529417-21kworker/u8:3+events_unbound08:54:590
5112689911199,10cyclictest544470-21apt-get08:50:121
51126899110101,6cyclictest521159-21latency_hist07:40:021
5112689910883,22cyclictest611886-21latency_hist12:20:011
5112639910895,10cyclictest1213033-21systemd-journal12:25:010
51126399108100,6cyclictest588555-21kworker/u8:0+flush-179:011:10:000
5112639910798,6cyclictest516365-21latency_hist07:25:010
5112689910697,6cyclictest582332-21kworker/u8:1+flush-179:010:50:231
5112639910693,3cyclictest516899-21kworker/u8:0+events_unbound07:55:250
51126399106101,4cyclictest529414-21kworker/u8:1+events_unbound08:40:240
5112689910594,9cyclictest513425-21apt-get07:15:111
5112639910598,5cyclictest573157-21kworker/u8:2+events_unbound10:30:150
5112639910598,4cyclictest516899-21kworker/u8:0+flush-179:008:00:210
5112639910594,8cyclictest519539-21latency_hist07:35:010
5112639910593,10cyclictest1213033-21systemd-journal11:35:000
51126399105100,3cyclictest529414-21kworker/u8:1+events_unbound08:05:250
5112689910495,6cyclictest590809-21store11:15:011
5112639910498,4cyclictest529417-21kworker/u8:3+events_unbound09:00:250
5112639910495,6cyclictest600479-21kworker/u8:2+flush-179:012:05:200
5112639910395,5cyclictest602227-21kworker/u8:0+flush-179:012:10:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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