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2026-07-26 - 22:22

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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: 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 rack4slot1s.osadl.org (updated Sun Jul 26, 2026 12:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2112721530,3sleep20-21swapper/207:33:432
29412840,2sleep12942-21/usr/sbin/munin11:03:501
29412840,2sleep12942-21/usr/sbin/munin11:03:501
227792790,2sleep30-21swapper/309:03:493
227792790,2sleep30-21swapper/309:03:493
186822710,2chrt18683-21sendmail_mailqu10:18:521
186822710,2chrt18683-21sendmail_mailqu10:18:521
321672680,2sleep30-21swapper/310:53:553
321672680,2sleep30-21swapper/310:53:553
113752670,3sleep10-21swapper/109:58:541
175402640,3sleep20-21swapper/208:48:522
316452610,3sleep20-21swapper/210:53:502
316452610,3sleep20-21swapper/210:53:502
9072600,1chrt0-21swapper/112:23:541
314972600,3sleep20-21swapper/209:28:442
139982570,2chrt0-21swapper/211:33:462
139982570,2chrt0-21swapper/211:33:462
293862550,3sleep10-21swapper/112:13:541
293862550,3sleep10-21swapper/112:13:541
133862550,1sleep0171ktimers/010:03:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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