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2026-03-14 - 16:54

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack0slot6s.osadl.org (updated Sat Mar 14, 2026 00:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13085422272265,4sleep150-21swapper/1519:06:377
13085342267260,4sleep90-21swapper/919:06:3119
13086632239231,5sleep140-21swapper/1419:07:576
13085822239220,12sleep40-21swapper/419:07:0614
13084172239219,12sleep50-21swapper/519:05:2715
13087312233214,12sleep100-21swapper/1019:08:532
13086262232212,12sleep80-21swapper/819:07:3118
13087082230212,11sleep110-21swapper/1119:08:343
13086252230210,12sleep70-21swapper/719:07:3017
13085212230209,13sleep20-21swapper/219:06:2412
13054242228207,13sleep30-21swapper/319:05:0513
13084742227206,13sleep190-21swapper/1919:06:0111
13087372225207,11sleep160-21swapper/1619:08:598
13087162225205,12sleep180-21swapper/1819:08:4110
13086842225206,13sleep130-21swapper/1319:08:165
13086122221201,12sleep170-21swapper/1719:07:199
13085152221201,12sleep00-21swapper/019:06:220
13087092216196,13sleep120-21swapper/1219:08:354
13084882209190,12sleep60-21swapper/619:06:0816
13086402202183,12sleep10-21swapper/119:07:441
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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