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2022-12-04 - 23:13

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #3

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 Core i7-4960X @3600 MHz, Linux 5.15.2-rt19 (Profile)

Latency plot of shadow in rack #0, slot #3
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 rack0slot3s.osadl.org (updated Sun Dec 04, 2022 00:44:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7721699449445,3cyclictest112145-21turbostat20:10:003
7722999448446,2cyclictest275302-21turbostat23:24:557
7722199446440,3cyclictest4158441-21wireplumber23:09:595
7721699446443,3cyclictest280253-21turbostat23:25:013
7721699446442,3cyclictest106388-21turbostat20:00:003
77216994460,446cyclictest0-21swapper/321:44:553
7721699444442,2cyclictest309979-21turbostat23:55:013
7722999443441,2cyclictest0-21swapper/721:00:007
7722999443441,2cyclictest0-21swapper/720:45:007
7721699443443,0cyclictest0-21swapper/320:59:553
7721699443441,2cyclictest0-21swapper/319:39:553
7721299442441,1cyclictest185071-21kworker/u16:222:35:592
7722999441437,2cyclictest0-21swapper/722:39:597
7722999440438,2cyclictest0-21swapper/723:04:557
7721699440438,0cyclictest300066-21turbostat23:45:003
7722999439437,2cyclictest123569-21turbostat20:34:557
7721699438436,1cyclictest166223-21turbostat21:30:003
7721699438436,1cyclictest0-21swapper/323:34:553
7722999436434,2cyclictest344887-21turbostat00:34:557
7722999436434,2cyclictest0-21swapper/722:34:557
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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