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2024-04-16 - 14:05

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 Tue Apr 16, 2024 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5726342233176,18sleep70-21swapper/719:07:477
5725742227168,18sleep40-21swapper/419:06:564
5725732225165,48sleep30-21swapper/319:06:553
5726602223170,18sleep60-21swapper/619:08:116
5726382223186,24sleep20-21swapper/219:07:502
5727832219173,33sleep50-21swapper/519:09:545
5726842217178,25sleep10-21swapper/119:08:291
5727202207179,18sleep00-21swapper/019:09:010
573026992928,1cyclictest576893-21apt-get19:15:093
573035992719,7cyclictest585067-21sh19:30:006
57303599260,21cyclictest0-21swapper/622:55:136
57302499258,4cyclictest0-21swapper/219:48:532
57302499258,4cyclictest0-21swapper/200:01:292
573024992521,3cyclictest590790-21idleruntime-cro19:40:002
57303799240,3cyclictest654846-21turbostat.cron21:30:007
57303299240,23cyclictest654835-21cron21:30:005
57303299240,23cyclictest0-21swapper/521:55:145
57302199240,23cyclictest723830-21cron23:30:001
573019992423,1cyclictest625682-21idleruntime-cro20:40:000
573037992321,1cyclictest637147-21munin-run21:00:007
57303799230,22cyclictest599395-21munin-run19:55:017
57303599230,22cyclictest652000-21perf21:25:006
57303599230,22cyclictest0-21swapper/623:40:146
57303599230,22cyclictest0-21swapper/623:40:136
57303599230,22cyclictest0-21swapper/619:45:076
573030992323,0cyclictest0-21swapper/400:30:024
573030992321,1cyclictest0-21swapper/421:55:144
57303099230,22cyclictest695211-21munin-run22:40:014
57303099230,1cyclictest698505-21apt-get22:45:124
573026992321,2cyclictest51-21ksoftirqd/322:10:123
57302699230,22cyclictest491rcuc/323:05:123
573024992321,1cyclictest0-21swapper/221:20:002
573024992320,2cyclictest695216-21cut22:40:002
57302499230,22cyclictest715254-21munin-run23:15:012
57302499230,22cyclictest0-21swapper/221:00:012
57302499230,22cyclictest0-21swapper/220:30:142
573021992321,1cyclictest628992-21apt-get20:45:151
573021992320,1cyclictest0-21swapper/119:20:061
57302199230,22cyclictest762364-21apt-get00:35:131
57302199230,22cyclictest729838-21munin-run23:40:011
57302199230,22cyclictest729838-21munin-run23:40:001
57302199230,22cyclictest0-21swapper/123:40:131
57302199230,22cyclictest0-21swapper/123:40:131
57302199230,22cyclictest0-21swapper/122:45:141
57302199230,1cyclictest0-21swapper/120:55:121
573037992221,1cyclictest614675-21apt-get20:20:117
573037992221,1cyclictest0-21swapper/720:10:007
573037992221,1cyclictest0-21swapper/700:40:007
57303799220,21cyclictest0-21swapper/723:25:127
57303799220,21cyclictest0-21swapper/721:05:147
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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