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2023-10-04 - 04:14

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, 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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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 rackcslot7s.osadl.org (updated Wed Oct 04, 2023 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
283414429960,14sleep10-21swapper/119:09:441
283393029373,14sleep00-21swapper/019:06:590
283431899912,7cyclictest0-21swapper/122:30:581
162399880,70rtkit-daemon0-21swapper/219:05:052
283381028763,16sleep30-21swapper/319:06:003
162399860,4rtkit-daemon0-21swapper/220:42:372
2834318997321,46cyclictest26-21ksoftirqd/121:00:291
2834318997240,25cyclictest1753-21gnome-shell21:45:581
2834318997240,25cyclictest1753-21gnome-shell21:45:581
2834318997149,6cyclictest231irq_work/122:15:291
283431499682,59cyclictest1753-21gnome-shell19:15:290
283431899663,18cyclictest1753-21gnome-shell23:00:301
2834318996510,49cyclictest881251-21Softwar~cThread22:55:581
283432599642,53cyclictest1753-21gnome-shell21:30:293
283431899644,51cyclictest1753-21gnome-shell20:15:291
29440162630,8sleep2341ksoftirqd/200:20:352
283431499633,52cyclictest1753-21gnome-shell21:00:580
283432599622,57cyclictest0-21swapper/319:29:583
283431499625,15cyclictest1753-21gnome-shell21:59:580
283431499621,6cyclictest880898-21Xwayland22:15:290
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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