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2026-06-14 - 11:08

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 rack7slot7s.osadl.org (updated Sun Jun 14, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1685629565,8sleep20-21swapper/219:06:042
1703729179,8sleep00-21swapper/019:08:230
1690928963,9sleep30-21swapper/319:06:453
1692828766,6sleep10-21swapper/119:07:001
250122810,0sleep10-21swapper/120:30:251
17255993230,1cyclictest0-21swapper/223:46:222
17255993229,2cyclictest0-21swapper/223:05:222
17255992920,9cyclictest0-21swapper/223:56:012
17255992725,2cyclictest0-21swapper/222:04:322
17255992724,2cyclictest0-21swapper/222:18:222
17255992719,8cyclictest0-21swapper/200:05:512
1725599270,3cyclictest0-21swapper/222:25:352
17255992623,3cyclictest0-21swapper/222:33:122
17255992618,8cyclictest0-21swapper/222:07:222
1725599261,7cyclictest0-21swapper/223:36:552
17255992516,9cyclictest0-21swapper/200:39:422
17251992522,2cyclictest0-21swapper/122:42:411
1725199250,25cyclictest0-21swapper/121:57:381
1724799250,15cyclictest0-21swapper/021:22:120
17255992423,1cyclictest0-21swapper/221:23:342
17255992420,4cyclictest0-21swapper/221:10:222
17255992415,9cyclictest0-21swapper/200:27:112
1725599240,1cyclictest0-21swapper/200:20:322
1725599240,1cyclictest0-21swapper/200:20:322
1724799240,0cyclictest0-21swapper/000:25:490
1725799223,1cyclictest141rcu_preempt22:21:303
17257992221,1cyclictest0-21swapper/322:45:163
17255992220,2cyclictest0-21swapper/223:31:222
1725599220,22cyclictest0-21swapper/223:13:012
1725599220,22cyclictest0-21swapper/200:10:222
17251992220,1cyclictest0-21swapper/120:20:141
1724799221,20cyclictest0-21swapper/021:30:130
1724799220,20cyclictest0-21swapper/022:27:430
1724799220,17cyclictest0-21swapper/021:14:270
1725599215,16cyclictest0-21swapper/221:04:312
17255992120,1cyclictest0-21swapper/222:42:512
17255992119,2cyclictest0-21swapper/223:28:322
17255992119,2cyclictest0-21swapper/223:01:022
17255992119,1cyclictest0-21swapper/221:45:122
17255992117,4cyclictest0-21swapper/222:38:322
1725599210,21cyclictest0-21swapper/222:10:312
1725199212,3cyclictest141rcu_preempt00:07:001
17255992019,1cyclictest0-21swapper/220:40:142
17255992017,3cyclictest0-21swapper/200:16:222
17255992016,4cyclictest0-21swapper/221:15:022
1725599200,20cyclictest0-21swapper/221:39:422
17251992018,1cyclictest0-21swapper/122:00:141
17247992019,1cyclictest0-21swapper/021:44:280
1724799200,18cyclictest0-21swapper/022:42:510
1724799200,16cyclictest0-21swapper/019:30:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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