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2023-03-20 - 22:26

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 
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x86 Intel Xeon E3-1230 v2 @3300 MHz, Linux 4.19.1-rt3 (Profile)

Latency plot of shadow in rack #c, slot #8
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
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 Mon Mar 20, 2023 12:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
125391630,32ptp4l0-21swapper/107:05:481
125391630,30ptp4l0-21swapper/007:05:320
493326150,6sleep70-21swapper/707:08:057
318552590,0sleep60-21swapper/608:05:146
125391590,5ptp4l0-21swapper/407:05:344
125391580,6ptp4l0-21swapper/507:09:235
472425746,6sleep20-21swapper/207:05:282
343325643,7sleep30-21swapper/307:05:123
42782550,0sleep70-21swapper/710:00:267
474825039,6sleep60-21swapper/607:05:486
125391340,0ptp4l0-21swapper/008:05:140
125391320,4ptp4l0-21swapper/009:45:490
125391320,0ptp4l0-21swapper/412:24:424
125391320,0ptp4l0-21swapper/112:06:521
125391320,0ptp4l0-21swapper/010:45:290
125391310,3ptp4l0-21swapper/612:15:186
125391310,0ptp4l0-21swapper/610:16:416
125391310,0ptp4l0-21swapper/208:00:242
125391310,0ptp4l0-21swapper/111:33:491
125391310,0ptp4l0-21swapper/110:11:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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