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2026-08-06 - 19:14

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #5

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 50 highest latencies:
System rack0slot5s.osadl.org (updated Thu Aug 06, 2026 00:45:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40219712368343,17sleep60-21swapper/612
40219712368343,17sleep60-21swapper/612
40222082358332,17sleep130-21swapper/135
40222082358332,17sleep130-21swapper/135
40219682346305,14sleep30-21swapper/39
40219682346305,14sleep30-21swapper/39
40220132341315,17sleep140-21swapper/146
40220132341315,17sleep140-21swapper/146
40219762340315,16sleep110-21swapper/113
40219762340315,16sleep110-21swapper/113
40221792339314,16sleep20-21swapper/28
40221792339314,16sleep20-21swapper/28
40220932339313,17sleep70-21swapper/713
40220932339313,17sleep70-21swapper/713
40221502338312,17sleep90-21swapper/915
40221502338312,17sleep90-21swapper/915
40221392337311,16sleep150-21swapper/157
40221392337311,16sleep150-21swapper/157
40220872337312,16sleep10-21swapper/11
40220872337312,16sleep10-21swapper/11
40220072337313,16sleep80-21swapper/814
40220072337313,16sleep80-21swapper/814
40222072336310,17sleep120-21swapper/124
40222072336310,17sleep120-21swapper/124
40221992336311,16sleep40-21swapper/410
40221992336311,16sleep40-21swapper/410
40219882336310,16sleep50-21swapper/511
40219882336310,16sleep50-21swapper/511
40219392336312,15sleep00-21swapper/00
40219392336312,15sleep00-21swapper/00
40222052335310,16sleep100-21swapper/102
40222052335310,16sleep100-21swapper/102
4022640996616,24cyclictest437126-21CPU5
1114772570,0sleep130-21swapper/135
402264099468,25cyclictest0-21swapper/135
402264099457,25cyclictest0-21swapper/135
402264099380,14cyclictest0-21swapper/135
4022648993429,4cyclictest1612-21snmpd7
402263599329,1cyclictest0-21swapper/124
4022585993131,0cyclictest0-21swapper/00
402264099306,13cyclictest0-21swapper/135
402261599307,1cyclictest0-21swapper/713
4022635992926,2cyclictest437115-21CPU4
402262999290,1cyclictest0-21swapper/102
4022597992925,1cyclictest1612-21snmpd9
4022597992925,1cyclictest1612-21snmpd9
402259299290,28cyclictest0-21swapper/28
4022648992827,1cyclictest1612-21snmpd7
4022648992826,1cyclictest1612-21snmpd7
4022648992826,1cyclictest1612-21snmpd7
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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