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2026-07-30 - 17:48

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 Jul 30, 2026 00:45:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19144012391367,16sleep90-21swapper/915
19144452352307,15sleep100-21swapper/102
19145002348305,32sleep130-21swapper/135
19146102345319,17sleep110-21swapper/113
19145242342316,17sleep150-21swapper/157
19144672342299,33sleep140-21swapper/146
19145672341313,18sleep50-21swapper/511
19146482339313,17sleep120-21swapper/124
19144942339312,17sleep70-21swapper/713
19143772338313,16sleep30-21swapper/39
19143522337312,16sleep20-21swapper/28
19144332336295,16sleep00-21swapper/00
19144592335309,17sleep60-21swapper/612
19143632335312,15sleep80-21swapper/814
19144912334308,17sleep40-21swapper/410
19144712334310,15sleep10-21swapper/11
1914985993332,1cyclictest0-21swapper/39
1914974993333,0cyclictest0-21swapper/00
1915013993232,0cyclictest0-21swapper/915
1914982993110,20cyclictest1612-21snmpd8
1914985993025,1cyclictest1612-21snmpd9
1915015992929,0cyclictest0-21swapper/102
191500499290,27cyclictest0-21swapper/713
191500499290,27cyclictest0-21swapper/713
1914996992926,3cyclictest1612-21snmpd12
191499699290,1cyclictest0-21swapper/612
191499399296,23cyclictest0-21swapper/511
1914985992925,1cyclictest1612-21snmpd9
1915034992827,1cyclictest1612-21snmpd7
191503499280,27cyclictest0-21swapper/157
1915030992828,0cyclictest0-21swapper/146
1915030992827,1cyclictest1612-21snmpd6
191503099280,27cyclictest0-21swapper/146
191502399280,1cyclictest0-21swapper/124
1915019992827,1cyclictest0-21swapper/113
1914996992827,1cyclictest1612-21snmpd12
191499699280,27cyclictest0-21swapper/612
191499699280,27cyclictest0-21swapper/612
191498599280,27cyclictest511ktimers/39
191498599280,27cyclictest511ktimers/39
191498599280,27cyclictest0-21swapper/39
1914974992827,1cyclictest1612-21snmpd0
1914974992827,1cyclictest1612-21snmpd0
191497499280,27cyclictest0-21swapper/00
1915034992726,1cyclictest1612-21snmpd7
1915034992726,1cyclictest1612-21snmpd7
1915034992726,1cyclictest1612-21snmpd7
1915034992726,1cyclictest1612-21snmpd7
191503499270,27cyclictest0-21swapper/157
191503499270,27cyclictest0-21swapper/157
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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