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2026-09-05 - 02:48

OSADL QA Farm on Real-time of Mainline Linux

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

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 rackeslot8s.osadl.org (updated Fri Sep 04, 2026 12:43:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1191133992421,1cyclictest0-21swapper/310:10:203
1191133992017,1cyclictest0-21swapper/310:00:023
1191133992017,1cyclictest0-21swapper/309:15:153
119113399192,13cyclictest1570189-21taskset11:32:173
1191133991916,1cyclictest0-21swapper/312:30:003
1191133991916,1cyclictest0-21swapper/311:25:003
1191133991915,1cyclictest0-21swapper/307:35:003
119113399191,13cyclictest1400812-21turbostat09:45:003
1191133991815,1cyclictest0-21swapper/312:16:413
1191133991815,1cyclictest0-21swapper/310:50:193
1191133991815,1cyclictest0-21swapper/308:02:423
119113399177,6cyclictest1314727-21turbostat08:45:003
119113399176,7cyclictest1321064-21turbostat08:50:003
119113399173,11cyclictest0-21swapper/310:32:163
119113399173,11cyclictest0-21swapper/310:32:163
119113399172,9cyclictest1206396-21taskset07:20:123
119113399172,12cyclictest0-21swapper/312:30:103
1191133991715,0cyclictest0-21swapper/311:08:083
1191133991714,1cyclictest0-21swapper/312:20:263
1191133991714,1cyclictest0-21swapper/312:00:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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