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2025-09-18 - 10:44

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 Thu Sep 18, 2025 00:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
56734991127,64cyclictest296745-40tracker-miner-f23:51:128
301432520690,66data-loop.00-21swapper/219:06:2412
301432520690,66data-loop.00-21swapper/019:06:450
301432520680,66data-loop.00-21swapper/1619:09:318
301432520680,66data-loop.00-21swapper/1119:07:103
301432520670,65data-loop.00-21swapper/1319:05:435
301433720660,60data-loop.00-21swapper/719:05:3717
301432520650,63data-loop.00-21swapper/319:05:4313
301432520630,61data-loop.00-21swapper/819:06:3518
301432520630,61data-loop.00-21swapper/1919:07:5911
301432520630,61data-loop.00-21swapper/1719:08:449
301432520630,60data-loop.00-21swapper/919:06:5719
301432520620,60data-loop.00-21swapper/1219:06:274
301432520620,59data-loop.00-21swapper/619:09:1916
301432520620,55data-loop.00-21swapper/119:05:201
301432520610,59data-loop.00-21swapper/1819:06:2910
301432520610,59data-loop.00-21swapper/1519:07:557
301432520600,58data-loop.00-21swapper/1419:05:456
301432520600,58data-loop.00-21swapper/1019:07:082
301432520560,50data-loop.00-21swapper/519:07:5415
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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