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2026-06-06 - 04:22

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack3slot6s.osadl.org (updated Sat Jun 06, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
125912110100,6sleep10-21swapper/119:07:361
10992210683,18sleep00-21swapper/019:05:110
12506210181,15sleep30-21swapper/319:06:293
10771210076,16sleep20-21swapper/219:05:012
94382760,0sleep00-21swapper/020:20:140
187312740,0sleep20-21swapper/221:32:322
130812600,0sleep20-21swapper/221:26:032
1280399300,19cyclictest0-21swapper/119:30:121
326152230,1sleep132617-21ntp_kernel_pll_22:20:171
1280499231,3cyclictest6674-21ssh23:35:092
1280399210,17cyclictest0-21swapper/121:06:051
12805992017,2cyclictest4486-21kworker/u8:120:52:053
1280499200,18cyclictest0-21swapper/219:45:112
1280399201,2cyclictest0-21swapper/100:15:111
1280399200,15cyclictest0-21swapper/123:08:051
12802992017,2cyclictest0-21swapper/021:00:100
12802992017,2cyclictest0-21swapper/020:50:110
12805991916,2cyclictest7611-21kworker/u8:221:57:053
12805991916,2cyclictest28638-21kworker/u8:121:08:043
1280399190,2cyclictest0-21swapper/119:40:101
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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