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2024-04-26 - 01:51

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #4

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 rack8slot4s.osadl.org (updated Thu Apr 25, 2024 12:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5919162222163,19sleep70-21swapper/707:06:527
5921242220165,18sleep00-21swapper/007:09:500
5919412220162,18sleep40-21swapper/407:07:134
5920042218178,26sleep20-21swapper/207:08:082
5921182214182,21sleep30-21swapper/307:09:453
5920922214173,26sleep60-21swapper/607:09:246
5920462208173,21sleep50-21swapper/507:08:435
5918722208176,21sleep10-21swapper/107:06:141
59238299312,25cyclictest0-21swapper/408:25:014
59239199290,22cyclictest748714-21apt-get11:40:007
59239199260,25cyclictest0-21swapper/711:30:007
59239199260,22cyclictest0-21swapper/709:00:017
59238099260,25cyclictest0-21swapper/312:10:123
59238099260,25cyclictest0-21swapper/312:10:123
59239199250,24cyclictest595102-21apt-get07:15:017
59239199250,24cyclictest595102-21apt-get07:15:017
59238899250,24cyclictest688440-21apt-get09:55:116
592382992521,3cyclictest595248-21apt-config07:15:014
592382992521,3cyclictest595248-21apt-config07:15:014
59238299250,2cyclictest630498-21awk08:15:014
59237799250,24cyclictest0-21swapper/207:45:002
592391992419,4cyclictest0-21swapper/709:55:007
59239199240,0cyclictest0-21swapper/708:35:137
59239199240,0cyclictest0-21swapper/708:20:117
592388992422,1cyclictest0-21swapper/612:30:006
59238899240,23cyclictest0-21swapper/610:10:106
592380992423,1cyclictest0-21swapper/310:05:123
592377992422,1cyclictest755136-21apt-get11:50:112
59237599240,23cyclictest714057-21munin-run10:40:001
59237599240,23cyclictest688027-21perf09:55:001
59237599240,23cyclictest650952-21apt-get08:50:141
592370992422,1cyclictest598945-21cron07:20:000
592370992422,1cyclictest598945-21cron07:20:000
592391992321,2cyclictest0-21swapper/709:15:107
592391992319,3cyclictest639495-21apt-get08:30:107
59239199230,2cyclictest661597-21sed09:05:277
59239199230,22cyclictest0-21swapper/710:35:017
59239199230,22cyclictest0-21swapper/710:30:107
592388992321,1cyclictest602252-21apt-get07:25:136
592388992321,1cyclictest0-21swapper/611:40:016
592388992321,1cyclictest0-21swapper/609:45:116
59238899230,22cyclictest0-21swapper/610:45:006
59238899230,22cyclictest0-21swapper/607:20:126
59238899230,22cyclictest0-21swapper/607:20:126
59238299230,22cyclictest0-21swapper/410:30:004
59238299230,22cyclictest0-21swapper/408:55:124
592380992322,1cyclictest746286-21apt-get11:35:133
592380992321,1cyclictest772336-21apt-get12:20:153
592380992320,2cyclictest771902-21perf12:20:003
59238099230,22cyclictest629276-21ntpq08:10:213
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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