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2026-03-04 - 05:24
[ 290.152] (II) VESA: driver for VESA chipsets: vesa

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #3

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 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 20 highest latencies:
System rack3slot3s.osadl.org (updated Wed Mar 04, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2043270212959,65sleep30-21swapper/319:08:523
204305928663,17sleep00-21swapper/019:06:170
204329928365,12sleep20-21swapper/219:09:152
204329828254,9sleep10-21swapper/119:09:141
2043506992218,2cyclictest0-21swapper/323:06:453
2043506992212,7cyclictest2180074-21chrt21:11:233
2043506992113,6cyclictest66950irq/132-enp1s0-TxRx-322:06:303
204350699211,16cyclictest0-21swapper/319:23:483
204350699211,16cyclictest0-21swapper/300:36:473
2043506992017,1cyclictest0-21swapper/323:10:153
2043506992016,2cyclictest0-21swapper/322:35:343
204350699201,16cyclictest2227313-21taskset21:40:063
204350699201,16cyclictest0-21swapper/323:01:253
204350699201,15cyclictest0-21swapper/300:27:563
204350699201,15cyclictest0-21swapper/300:12:413
204350699200,16cyclictest22682442sleep322:01:323
204350699198,8cyclictest2509040-21turbostat00:24:563
204350699191,6cyclictest2252455-21taskset21:53:493
2043506991914,2cyclictest0-21swapper/323:16:083
204350699191,15cyclictest66950irq/132-enp1s0-TxRx-323:42:333
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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