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2024-04-24 - 09:12

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, 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 here to display the system's profile data or here to proceed to next system.
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 rackcslot4s.osadl.org (updated Wed Apr 24, 2024 00:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
57799344,27cyclictest23710-21latency_hist23:40:000
59099322,17cyclictest30720-21head20:40:283
585993110,19cyclictest26675-21sed23:45:272
59099302,22cyclictest17381-21apt-get23:20:123
57799301,25cyclictest17125-21latency_hist23:20:010
57799301,25cyclictest17125-21latency_hist23:20:010
57799301,22cyclictest0-21swapper/021:35:140
57799300,27cyclictest6182-21cron19:30:000
59099291,9cyclictest21072-21apt-config20:15:013
57799296,21cyclictest6843-21sed21:10:000
58599289,16cyclictest32602-21grep00:05:182
58599287,5cyclictest9130-21wc00:30:302
58599283,5cyclictest16854-21apt-get23:20:122
58599282,13cyclictest9583-21apt-get00:35:132
585992812,14cyclictest31012-21cat20:45:002
58599281,13cyclictest6744-21snmp_o5powerctl22:45:252
58599281,12cyclictest4090-21snmp_o5powerctl00:15:242
57799289,16cyclictest26327-21expr20:30:100
57799288,18cyclictest30583-21cat00:00:010
57799288,18cyclictest1806-21tr22:30:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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