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2024-11-23 - 17:01

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 20 highest latencies:
System rack8slot4s.osadl.org (updated Sat Nov 23, 2024 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23439592228170,45sleep60-21swapper/607:09:406
23437132227167,19sleep40-21swapper/407:06:094
23438832223183,25sleep50-21swapper/507:08:365
23437102217179,24sleep10-21swapper/107:06:061
23437582216178,24sleep20-21swapper/207:06:482
23437592212182,19sleep30-21swapper/307:06:493
23439032210182,18sleep70-21swapper/707:08:537
23439532208176,20sleep00-21swapper/007:09:340
234421199300,29cyclictest0-21swapper/108:30:001
234422199290,3cyclictest2489590-21munin-run11:20:004
234422199280,22cyclictest0-21swapper/411:00:004
2344221992717,9cyclictest2346942-21apt-get07:15:004
234422999269,0cyclictest0-21swapper/708:56:457
234422999260,1cyclictest2461187-21apt-get10:30:167
234421199265,2cyclictest2478142-21cron10:59:591
234421199260,22cyclictest2422560-21idleruntime-cro09:25:001
234422799250,24cyclictest0-21swapper/610:40:126
234422799250,24cyclictest0-21swapper/608:40:006
2344229992419,4cyclictest2446634-21apt-get10:05:137
234422799240,23cyclictest2451937-21idleruntime-cro10:15:006
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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