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2025-09-18 - 00:58

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 Wed Sep 17, 2025 12:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
11843224282190,96sleep00-21swapper07:06:330
12280991608,127cyclictest25047-21grep08:20:550
122809915911,122cyclictest22298-21apt-get11:20:260
122809915820,29cyclictest22095-21apt-get08:05:230
122809915715,100cyclictest13472-21apt-get10:31:110
122809915616,23cyclictest6514-21irqstats09:45:390
122809915610,39cyclictest30281-21grep08:52:030
122809915516,25cyclictest1622-21diskstats12:30:320
122809915516,117cyclictest13474-21munin-run10:30:010
122809915512,100cyclictest19844-21/usr/sbin/munin11:06:110
122809915416,113cyclictest27771-21munin-run08:40:030
122809915415,118cyclictest27404-21df11:50:270
122809915415,116cyclictest2969-21apt-get09:25:240
122809915414,117cyclictest29802-21apt-get12:05:250
122809915413,113cyclictest16632-21/usr/sbin/munin10:45:580
122809915411,27cyclictest32291-21if_eth009:05:400
122809915339,23cyclictest19202-21if_eth011:00:370
122809915319,22cyclictest30284-21kworker/u2:1412:10:180
122809915317,113cyclictest31659-21diskstats12:15:330
122809915315,28cyclictest10176-21grep10:06:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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