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2024-11-23 - 14:12

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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 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 rack0slot8s.osadl.org (updated Sat Nov 23, 2024 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
275991960,83ptp4l0-21swapper/107:05:171
94980880,82rtkit-daemon0-21swapper/407:05:236
261626756,9sleep50-21swapper/507:05:477
3198926553,9sleep110-21swapper/1107:05:183
286026553,10sleep70-21swapper/707:09:259
271726553,10sleep00-21swapper/007:07:180
263026251,9sleep60-21swapper/607:06:008
263426049,9sleep100-21swapper/1007:06:042
230842500,0sleep30-21swapper/309:40:135
215602500,0sleep10-21swapper/109:35:221
206562480,0sleep80-21swapper/811:45:1810
331299213,14cyclictest21108-21kworker/u24:112:20:0010
328499213,12cyclictest0-21swapper/207:55:004
44362190,0sleep60-21swapper/609:15:128
3321991918,1cyclictest0-21swapper/1011:00:162
328499194,10cyclictest0-21swapper/207:10:014
3321991817,1cyclictest0-21swapper/1011:40:282
331299183,9cyclictest0-21swapper/807:35:0010
328499183,9cyclictest0-21swapper/209:15:004
327599183,9cyclictest0-21swapper/010:20:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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