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2024-07-13 - 07:24

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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.
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 10 highest latencies:
System rackeslot8s.osadl.org (updated Fri Jul 12, 2024 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
189915199746742,3cyclictest2072778-21kworker/1:2+events09:35:221
189915799745734,5cyclictest1823626-21kworker/3:2+events12:03:273
189915799743738,4cyclictest1823626-21kworker/3:2+events09:16:253
189915799743737,5cyclictest1823626-21kworker/3:2+events12:07:213
189915199743737,5cyclictest2151511-21kworker/1:2+events11:42:441
189914799743738,4cyclictest2171548-21kworker/0:0+events10:58:260
189914799742738,3cyclictest2071521-21kworker/0:0+events09:43:290
189915799739733,5cyclictest1823626-21kworker/3:2+events07:40:233
189915799738733,4cyclictest1823626-21kworker/3:2+events09:10:543
189915799737731,4cyclictest1823626-21kworker/3:2+events11:04:193
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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