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2025-11-15 - 09:11

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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.

Total number of samples: 50.5 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 rack5slot7s.osadl.org (updated Sat Nov 15, 2025 00:45:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21634224332195,96sleep00-21swapper19:08:490
218129916318,101cyclictest7627-21apt-get00:11:590
218129916018,117cyclictest30820-21munin-run23:20:060
218129915917,118cyclictest19321-21apt-get22:10:330
218129915828,22cyclictest0-21swapper23:40:370
218129915714,23cyclictest12350-21munin-run00:40:010
218129915712,103cyclictest27652-21/usr/sbin/munin19:41:370
218129915711,121cyclictest30352-21gzip19:56:480
218129915617,116cyclictest7368-21memory20:55:450
218129915518,21cyclictest24386-21munin-run22:40:020
218129915517,96cyclictest3357-21memory20:30:440
218129915513,120cyclictest31403-21cat23:21:250
218129915511,120cyclictest10037-21cut21:10:590
218129915414,23cyclictest5709-21irqstats20:45:440
218129915413,120cyclictest10543-21apt-get00:31:060
218129915411,118cyclictest24673-21/usr/sbin/munin19:25:450
218129915321,27cyclictest28119-21apt-get19:45:320
218129915314,118cyclictest4617-21munin-run20:40:030
218129915313,25cyclictest3957-21/usr/sbin/munin23:51:200
218129915312,26cyclictest21534-21ls22:20:440
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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