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2024-04-26 - 00:20

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #7

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 50 highest latencies:
System rack8slot7s.osadl.org (updated Thu Apr 25, 2024 13:13:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2408:51:007630
38,08:50:367629
008:50:367625
0,08:50:367624
0,08:50:367623
0,08:50:367622
0,08:50:367621
0,08:50:367620
0,08:50:367619
0,08:50:367618
0,08:50:367617
0,08:50:367616
0,08:50:367615
0,08:50:367614
0,08:50:367613
0,08:50:367612
0,08:50:367611
0,08:50:367610
0,08:50:367609
0,08:50:367608
0,08:50:367607
0,08:50:367606
0,08:50:367605
0,08:50:367604
0,08:50:367603
0,08:50:367602
0,08:50:367601
0,08:50:367600
0,08:50:367599
0,08:50:367598
0,08:50:367597
0,08:50:367596
0,08:50:367595
0,08:50:367594
0,08:50:367593
0,08:50:367592
0,08:50:367591
0,08:50:367590
0,08:50:367589
0,08:50:367588
0,08:50:367587
0,08:50:367586
0,08:50:367585
0,08:50:367584
0,08:50:367583
0,08:50:367582
0,08:50:367581
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0,08:50:367579
0,08:50:367578
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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