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2026-01-12 - 01:56

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #8

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 rackeslot8s.osadl.org (updated Sun Jan 11, 2026 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32843999913056,1295cyclictest34225002sleep33
32843999912280,1224cyclictest36875112sleep33
3284399999841,977cyclictest3525555-21sleep3
3284399992320,1cyclictest0-21swapper/33
3284399992017,1cyclictest0-21swapper/33
3284399992014,4cyclictest3467495-21turbostat3
3284399991916,1cyclictest0-21swapper/33
33677122180,1sleep20-21swapper/22
328439999171,7cyclictest0-21swapper/33
3284399991714,1cyclictest0-21swapper/33
328439999165,8cyclictest3570530-21turbostat3
328439999155,7cyclictest0-21swapper/33
3284399991513,1cyclictest0-21swapper/33
3284399991513,1cyclictest0-21swapper/33
3284399991513,1cyclictest0-21swapper/33
3284399991512,1cyclictest0-21swapper/33
3284399991512,1cyclictest0-21swapper/33
32841202150,3sleep30-21swapper/33
328439999145,7cyclictest3693720-21turbostat3
3284399991413,0cyclictest0-21swapper/33
3284399991412,1cyclictest0-21swapper/33
3284399991412,1cyclictest0-21swapper/33
3284399991412,1cyclictest0-21swapper/33
3284399991412,1cyclictest0-21swapper/33
3284399991412,1cyclictest0-21swapper/33
3284399991412,1cyclictest0-21swapper/33
3284399991412,1cyclictest0-21swapper/33
3284399991412,0cyclictest0-21swapper/33
3284399991411,1cyclictest0-21swapper/33
3284399991411,1cyclictest0-21swapper/33
3284399991411,1cyclictest0-21swapper/33
3284399991411,1cyclictest0-21swapper/33
3284399991411,1cyclictest0-21swapper/33
328439999141,10cyclictest3628223-21taskset3
328439999141,10cyclictest3589455-21taskset3
328439999141,10cyclictest3499633-21turbostat3
328439999140,11cyclictest3577195-21taskset3
32796082141,3sleep23281315-21kthreadcore2
35065402131,3sleep03506572-21/usr/sbin/munin0
328439999134,7cyclictest3640842-21taskset3
328439999131,9cyclictest3605757-21taskset3
328439999131,9cyclictest3486513-21taskset3
328439999131,9cyclictest3383440-21taskset3
328439999131,8cyclictest3673962-21taskset3
328439999131,8cyclictest33124362sleep33
3284399991312,0cyclictest0-21swapper/33
3284399991312,0cyclictest0-21swapper/33
3284399991312,0cyclictest0-21swapper/33
3284399991311,1cyclictest0-21swapper/33
3284399991311,1cyclictest0-21swapper/33
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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