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2025-09-18 - 01:49

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #4

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 rack8slot4s.osadl.org (updated Wed Sep 17, 2025 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29619972232166,21sleep40-21swapper/407:08:304
29621052223186,24sleep20-21swapper/207:09:582
29618232222173,38sleep60-21swapper/607:05:596
29619962220162,20sleep30-21swapper/307:08:293
29618802217183,22sleep70-21swapper/707:06:507
29619652216179,24sleep00-21swapper/007:08:030
29619372216179,24sleep10-21swapper/107:07:401
29596632215182,21sleep50-21swapper/507:05:105
296250999250,24cyclictest3061687-21apt-get10:00:147
2962503992523,1cyclictest0-21swapper/610:00:146
2962509992423,1cyclictest0-21swapper/708:10:137
296250399240,23cyclictest2980407-21awk07:40:016
296250399240,23cyclictest2980407-21awk07:40:016
296250399240,23cyclictest0-21swapper/609:00:196
2962486992423,1cyclictest2968939-21sleep07:20:003
2962486992423,1cyclictest0-21swapper/312:25:113
296248699240,1cyclictest3046956-21munin-run09:35:003
2962483992422,2cyclictest3064110-21apt10:04:592
2962477992421,2cyclictest3117476-21ntpq11:35:201
2962472992422,1cyclictest2980823-21apt-get07:40:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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