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2022-12-04 - 23:29

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #7

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 i3-4360 CPU @3700 MHz, Linux 5.15.49-rt47 (Profile)

Latency plot of shadow in rack #0, slot #7
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 rack0slot7s.osadl.org (updated Sun Dec 04, 2022 00:43:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
487997211162,22sleep10-21swapper/119:05:341
488297210267,29sleep00-21swapper/019:09:220
488284210262,34sleep20-21swapper/219:09:122
48818529972,20sleep30-21swapper/319:07:563
6697282880,0sleep20-21swapper/221:49:162
48850399739,43cyclictest0-21swapper/022:04:390
488512996562,3cyclictest767612-21sensors23:45:212
488518996461,2cyclictest2366-21gnome-shell00:28:593
488503996462,1cyclictest763285-21ntp_states23:40:200
488503996462,1cyclictest650718-21ssh21:25:200
48850399640,63cyclictest0-21swapper/021:49:040
48850399640,63cyclictest0-21swapper/021:39:400
48850399640,63cyclictest0-21swapper/021:18:510
48850399640,63cyclictest0-21swapper/000:02:110
48851299630,1cyclictest0-21swapper/220:59:592
48851299630,1cyclictest0-21swapper/200:20:222
48850399630,63cyclictest570806-21pigz20:47:070
48850399630,62cyclictest601375-21readlink20:53:550
48850399630,0cyclictest0-21swapper/023:02:590
488518996260,1cyclictest2366-21gnome-shell21:17:583
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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