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2026-05-08 - 22:00

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #3

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 rack0slot3s.osadl.org (updated Fri May 08, 2026 00:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5070952260218,17sleep10-21swapper/119:06:501
5050062260251,6sleep50-21swapper/519:05:085
5070082258232,16sleep40-21swapper/419:05:394
5072092255207,16sleep20-21swapper/219:08:202
5071252254228,17sleep70-21swapper/719:07:117
5050072254214,32sleep60-21swapper/619:05:096
5072432247219,18sleep00-21swapper/019:08:490
5070402246220,17sleep30-21swapper/319:06:033
507639993128,3cyclictest512365-21cat19:15:185
50761399270,25cyclictest0-21swapper/022:46:290
507648992622,3cyclictest1391-21snmpd22:09:037
50764899260,22cyclictest0-21swapper/700:20:167
50764499260,24cyclictest0-21swapper/621:26:276
50764499260,22cyclictest0-21swapper/623:19:006
50764499260,22cyclictest0-21swapper/623:19:006
50763999260,24cyclictest0-21swapper/523:45:585
50763099260,24cyclictest0-21swapper/320:15:013
50763099260,22cyclictest0-21swapper/320:42:223
50763099260,22cyclictest0-21swapper/320:42:223
507625992625,1cyclictest0-21swapper/222:15:182
507648992521,3cyclictest1391-21snmpd23:14:547
507648992521,3cyclictest1391-21snmpd23:14:547
507648992521,3cyclictest1391-21snmpd22:56:547
507648992521,3cyclictest1391-21snmpd19:24:387
507648992518,5cyclictest0-21swapper/723:20:477
50764899250,23cyclictest0-21swapper/720:20:147
507644992521,3cyclictest1391-21snmpd21:54:046
507635992521,3cyclictest1391-21snmpd22:06:584
507635992521,3cyclictest1391-21snmpd22:03:014
507635992518,5cyclictest0-21swapper/421:45:294
507635992518,5cyclictest0-21swapper/420:50:154
507625992521,3cyclictest600134-21cat21:55:152
507625992521,3cyclictest1391-21snmpd23:16:142
507625992521,3cyclictest1391-21snmpd23:16:142
507625992518,5cyclictest0-21swapper/219:34:052
507617992521,3cyclictest1391-21snmpd19:22:371
507613992521,3cyclictest1391-21snmpd21:01:280
507648992421,2cyclictest1391-21snmpd21:20:457
507648992420,3cyclictest1391-21snmpd22:23:177
507648992417,5cyclictest0-21swapper/723:52:457
50764899241,22cyclictest0-21swapper/723:47:277
50764899241,22cyclictest0-21swapper/722:14:517
50764899240,23cyclictest0-21swapper/723:34:587
50764899240,22cyclictest0-21swapper/721:57:527
50764899240,1cyclictest0-21swapper/720:29:197
507644992421,2cyclictest1391-21snmpd00:29:556
50764499241,22cyclictest0-21swapper/623:34:526
50764499240,23cyclictest0-21swapper/622:07:366
507639992421,3cyclictest1391-21snmpd21:44:115
507639992420,3cyclictest1391-21snmpd22:37:175
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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