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2025-12-16 - 07:02

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, 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.
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 rackcslot7s.osadl.org (updated Tue Dec 16, 2025 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
186896122610,12sleep013-21ksoftirqd/019:08:120
197399980,5rtkit-daemon0-21swapper/023:40:500
197399970,14rtkit-daemon4497-21PK-Backend19:16:220
1869287999122,50cyclictest2069-21gnome-shell00:36:593
197399880,26rtkit-daemon4497-21PK-Backend22:30:380
197399870,11rtkit-daemon4497-21PK-Backend21:18:570
197399830,10rtkit-daemon1977842-21df_inode00:15:160
197399810,5rtkit-daemon0-21swapper/019:45:380
197399800,5rtkit-daemon0-21swapper/000:02:240
197399790,5rtkit-daemon0-21swapper/023:18:300
1869287997921,54cyclictest2069-21gnome-shell22:20:593
197399780,6rtkit-daemon4497-21PK-Backend21:10:300
197399780,5rtkit-daemon0-21swapper/022:40:490
197399780,5rtkit-daemon0-21swapper/020:32:150
197399770,6rtkit-daemon4497-21PK-Backend23:51:450
197399770,6rtkit-daemon4497-21PK-Backend23:14:120
197399770,5rtkit-daemon0-21swapper/023:27:430
197399770,5rtkit-daemon0-21swapper/021:01:010
197399760,6rtkit-daemon4497-21PK-Backend20:40:310
197399760,5rtkit-daemon4497-21PK-Backend20:56:480
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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