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2026-03-10 - 14:38

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 Tue Mar 10, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16342211898,14sleep00-21swapper/007:08:200
16151210989,13sleep10-21swapper/107:06:041
16271210689,12sleep20-21swapper/207:07:252
1585429777,13sleep30-21swapper/307:06:013
101102810,1sleep00-21swapper/011:26:010
28842760,0sleep30-21swapper/307:55:123
137762510,1sleep30-21swapper/310:58:063
110742240,0sleep10-21swapper/110:55:171
8152230,0sleep30-21swapper/310:13:583
16500992314,7cyclictest0-21swapper/111:30:111
1650199221,19cyclictest0-21swapper/208:40:112
1650199210,19cyclictest0-21swapper/207:40:102
1650099200,2cyclictest0-21swapper/109:25:121
16499992015,3cyclictest7145-21ssh10:20:080
16762190,0sleep20-21swapper/209:42:262
16501991915,2cyclictest0-21swapper/210:30:102
16500991914,3cyclictest21630-21ssh12:10:111
1650099191,16cyclictest0-21swapper/107:35:011
16502991815,2cyclictest6468-21ssh11:55:103
16502991814,2cyclictest14564-21ssh12:35:123
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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