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2025-10-14 - 07:58

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #5

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 20 highest latencies:
System rack0slot5s.osadl.org (updated Tue Oct 14, 2025 00:47:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
715402357330,19sleep20-21swapper/219:08:018
716712353299,17sleep40-21swapper/419:09:5710
713822350326,15sleep140-21swapper/1419:05:496
715642349321,19sleep90-21swapper/919:08:2515
714462346320,17sleep30-21swapper/319:06:419
713982346320,17sleep120-21swapper/1219:06:024
716532344315,18sleep50-21swapper/519:09:4211
715682344318,17sleep110-21swapper/1119:08:263
714912344317,18sleep70-21swapper/719:07:1713
714002343317,17sleep130-21swapper/1319:06:045
716402342316,18sleep100-21swapper/1019:09:312
716482340313,18sleep10-21swapper/119:09:381
714592340313,19sleep150-21swapper/1519:06:547
716192339311,18sleep80-21swapper/819:09:1114
714702339311,19sleep60-21swapper/619:07:0112
714232337312,17sleep00-21swapper/019:06:220
1648022950,0sleep50-21swapper/521:20:2211
1065572750,0sleep140-21swapper/1419:55:006
1065572750,0sleep140-21swapper/1419:54:596
71996995822,11cyclictest0-21swapper/623:09:5012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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