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2025-06-13 - 00:30

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #8

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 rackbslot8s (updated Thu Jun 12, 2025 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
230127999323322,1cyclictest2367050-21lspci09:12:252
230128299260259,1cyclictest2367050-21lspci09:12:263
230129499243243,0cyclictest0-21swapper/609:12:256
230129999169169,0cyclictest0-21swapper/709:12:267
230129099169168,1cyclictest0-21swapper/508:53:305
23009502141120,16sleep00-21swapper/007:09:070
23008922130116,9sleep70-21swapper/707:08:187
23008692127112,10sleep20-21swapper/207:07:552
23008812122108,9sleep50-21swapper/507:08:075
23009542121107,9sleep40-21swapper/407:09:114
23007942119105,9sleep10-21swapper/107:06:511
23007782118103,10sleep30-21swapper/307:06:373
23009202116102,9sleep60-21swapper/607:08:416
230129099103100,3cyclictest573-21snmpd11:44:365
2301299991020,100cyclictest0-21swapper/710:58:057
23012949910299,3cyclictest573-21snmpd10:45:196
23012949910299,3cyclictest573-21snmpd08:37:546
23012909910299,3cyclictest573-21snmpd12:29:325
23012909910299,3cyclictest573-21snmpd11:00:355
230129099102100,2cyclictest573-21snmpd10:43:435
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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