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2024-04-26 - 15:44

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, 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 20 highest latencies:
System rackcslot8s.osadl.org (updated Fri Apr 26, 2024 00:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
114462690,0sleep1241ktimersoftd/121:00:121
125391650,34ptp4l0-21swapper/119:08:051
125391610,30ptp4l0-21swapper/019:06:120
51952580,0sleep00-21swapper/022:30:150
51952580,0sleep00-21swapper/022:30:140
2414625847,6sleep60-21swapper/619:09:576
125391580,5ptp4l0-21swapper/419:07:064
2389125442,7sleep70-21swapper/719:06:457
125391540,2ptp4l0-21swapper/519:06:025
2412025332,7sleep30-21swapper/319:09:383
2223324837,6sleep20-21swapper/219:05:042
24438993430,3cyclictest481ktimersoftd/423:31:114
24438993326,3cyclictest481ktimersoftd/400:18:104
125391330,0ptp4l0-21swapper/021:23:500
125391330,0ptp4l0-21swapper/020:40:240
24438993227,4cyclictest481ktimersoftd/420:53:004
125391320,3ptp4l0-21swapper/121:13:481
125391320,0ptp4l0-21swapper/023:50:230
125391310,4ptp4l15427-21diskmemload23:48:011
125391310,4ptp4l0-21swapper/122:23:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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