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2025-07-17 - 23:10

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 Thu Jul 17, 2025 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
63678222850,7sleep3636788-21cpuspeed_turbos07:05:153
638260991171,46cyclictest1753-21gnome-shell12:05:203
6382579911627,22cyclictest1753-21gnome-shell12:18:532
65075721100,4sleep20-21swapper/207:40:312
71692421070,7sleep02197014-21PK-Backend10:50:020
71692421070,7sleep02197014-21PK-Backend10:50:020
64387821000,7sleep02197014-21PK-Backend07:25:000
638257999936,32cyclictest1753-21gnome-shell12:03:252
638251999527,7cyclictest2197014-21PK-Backend12:35:030
638257999415,13cyclictest1753-21gnome-shell12:30:192
638260999181,5cyclictest0-21swapper/312:33:093
162399900,13rtkit-daemon2197014-21PK-Backend08:43:240
6761112890,5sleep30-21swapper/308:55:153
162399890,52rtkit-daemon0-21swapper/207:09:142
638260998779,5cyclictest0-21swapper/312:10:073
638260998779,5cyclictest0-21swapper/312:10:073
638257998710,13cyclictest1753-21gnome-shell12:37:592
7492492860,5sleep00-21swapper/012:20:350
638260998676,6cyclictest0-21swapper/312:20:103
63826099861,45cyclictest1753-21gnome-shell12:03:493
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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