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2025-12-13 - 20:42

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 20 highest latencies:
System rack0slot5s.osadl.org (updated Sat Dec 13, 2025 00:45:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1127492389366,14sleep60-21swapper/619:07:1812
1127692366344,14sleep90-21swapper/919:07:3715
1128082363338,16sleep120-21swapper/1219:08:134
1128042358334,15sleep80-21swapper/819:08:0914
1126682358335,14sleep140-21swapper/1419:06:066
1128152321298,15sleep20-21swapper/219:08:198
1126992316294,14sleep110-21swapper/1119:06:343
1128462313289,15sleep150-21swapper/1519:08:487
1127922311286,16sleep130-21swapper/1319:07:585
1127822311289,14sleep50-21swapper/519:07:4911
1126952310287,15sleep70-21swapper/719:06:3113
1126582309284,17sleep40-21swapper/419:05:5510
1128482308289,12sleep00-21swapper/019:08:490
1127782308286,14sleep10-21swapper/119:07:441
1126452304282,14sleep100-21swapper/1019:05:452
1126912296274,14sleep30-21swapper/319:06:269
113293996916,29cyclictest0-21swapper/1519:14:407
11328099440,1cyclictest0-21swapper/1120:53:163
11328099420,0cyclictest0-21swapper/1119:36:243
113280994140,1cyclictest2247-21snmpd00:23:383
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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