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2025-11-24 - 16:48

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #0

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 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 50 highest latencies:
System r0s0s.osadl.org (updated Mon Nov 24, 2025 12:46:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24864922339318,5sleep20-21swapper/207:07:192
24864112299278,13sleep40-21swapper/407:06:164
24863512298269,22sleep00-21swapper/007:05:320
24864442296285,7sleep50-21swapper/507:06:425
24864242291256,27sleep70-21swapper/707:06:277
24863972289269,13sleep30-21swapper/307:06:073
24867092286265,14sleep10-21swapper/107:09:431
24866422286266,13sleep60-21swapper/607:09:006
2487206993330,2cyclictest833-21snmpd10:40:507
2487206993329,3cyclictest833-21snmpd11:07:537
2487206993329,3cyclictest833-21snmpd08:07:107
2487205993330,2cyclictest833-21snmpd12:09:316
2487205993330,2cyclictest833-21snmpd10:17:316
2487204993329,3cyclictest2617414-21cat11:40:155
2487203993330,2cyclictest833-21snmpd11:38:554
2487203993330,2cyclictest833-21snmpd09:55:074
2487203993330,2cyclictest833-21snmpd07:18:124
2487203993330,2cyclictest2522606-21cat08:20:154
248720399330,30cyclictest0-21swapper/409:38:274
248720399330,30cyclictest0-21swapper/407:41:034
2487202993330,2cyclictest2546310-21cat09:10:163
2487201993330,2cyclictest2570511-21cat10:00:162
2487200993332,1cyclictest2499479-21kworker/1:1+events08:12:251
2487199993330,2cyclictest2612741-21cat11:30:140
2487199993330,2cyclictest2553366-21cat09:25:160
2487199993330,2cyclictest2536931-21cat08:50:130
248719999330,31cyclictest0-21swapper/009:56:430
2487206993230,1cyclictest833-21snmpd12:08:157
248720699320,31cyclictest0-21swapper/711:56:307
248720699320,31cyclictest0-21swapper/711:40:157
2487205993230,1cyclictest2525125-21memory08:25:226
2487205993228,3cyclictest833-21snmpd11:44:556
2487205993228,3cyclictest833-21snmpd07:16:486
248720599320,31cyclictest0-21swapper/611:15:516
248720599320,31cyclictest0-21swapper/610:55:146
248720599320,31cyclictest0-21swapper/608:08:196
2487204993229,2cyclictest833-21snmpd12:02:465
2487204993229,2cyclictest833-21snmpd11:23:065
2487204993229,2cyclictest833-21snmpd11:19:395
2487204993229,2cyclictest833-21snmpd10:30:355
2487204993228,3cyclictest833-21snmpd12:16:115
248720499320,31cyclictest0-21swapper/511:10:425
248720499320,31cyclictest0-21swapper/511:00:155
2487203993230,2cyclictest833-21snmpd12:14:354
2487203993230,1cyclictest833-21snmpd10:29:234
2487203993230,1cyclictest833-21snmpd09:34:004
2487203993229,2cyclictest833-21snmpd10:46:354
2487203993229,2cyclictest833-21snmpd10:46:354
2487203993229,2cyclictest833-21snmpd08:25:554
2487203993229,2cyclictest833-21snmpd07:53:224
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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