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2024-11-23 - 16:44

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, 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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  Intel
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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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack1slot6s.osadl.org (updated Sat Nov 23, 2024 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1070499913,27cyclictest0-21swapper/208:00:362
10704999032,14cyclictest0-21swapper/205:20:452
244399800,6rtkit-daemon0-21swapper/204:47:281
244399700,9rtkit-daemon0-21swapper/005:21:190
244399680,3rtkit-daemon0-21swapper/007:59:200
1070399685,36cyclictest0-21swapper/107:05:271
1070399685,36cyclictest0-21swapper/107:05:271
15262670,3sleep00-21swapper/005:30:420
10701996530,16cyclictest0-21swapper/009:50:200
10701996530,16cyclictest0-21swapper/009:50:200
244399640,9rtkit-daemon0-21swapper/008:02:270
244399640,7rtkit-daemon0-21swapper/009:02:180
244399630,9rtkit-daemon0-21swapper/009:41:160
244399630,9rtkit-daemon0-21swapper/009:27:540
244399630,9rtkit-daemon0-21swapper/007:11:590
244399630,9rtkit-daemon0-21swapper/007:08:590
244399630,9rtkit-daemon0-21swapper/006:32:460
244399630,9rtkit-daemon0-21swapper/005:47:330
244399630,9rtkit-daemon0-21swapper/005:00:500
244399630,9rtkit-daemon0-21swapper/004:57:500
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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