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2026-01-09 - 10:33

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 Fri Jan 09, 2026 00:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23405224252190,89sleep00-21swapper19:09:490
234719916116,120cyclictest24262-21munin-run19:15:020
234719915919,26cyclictest12559-21apt-get00:35:150
234719915720,22cyclictest24806-21df_inode19:15:460
234719915718,37cyclictest32193-21munin-run23:20:020
234719915715,22cyclictest5198-21apt-get20:35:250
234719915715,117cyclictest29331-21awk23:00:560
234719915616,22cyclictest10807-21apt-get00:25:260
234719915615,117cyclictest8957-21apt-get00:15:270
234719915614,116cyclictest5348-21apt-get23:56:040
234719915612,118cyclictest15840-21head21:36:030
234719915518,23cyclictest31869-21munin-run20:00:030
234719915516,22cyclictest12711-21munin-run21:20:010
234719915513,119cyclictest10079-21apt-get21:06:170
23471991548,122cyclictest30326-21apt-get19:50:200
234719915421,106cyclictest29534-21apt-get19:45:210
234719915416,114cyclictest30535-21apt-config23:10:150
234719915413,115cyclictest19520-21ntpq22:00:470
234719915412,120cyclictest2538-21awk23:35:480
23471991539,23cyclictest18238-21grep21:51:030
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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