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2026-01-11 - 04:14

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 50 highest latencies:
System rack0slot4s.osadl.org (updated Sun Jan 11, 2026 00:46:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12100742368361,5sleep00-21swapper/019:07:090
12100742368361,5sleep00-21swapper/019:07:080
12100152366347,12sleep130-21swapper/1319:06:185
12100152366347,12sleep130-21swapper/1319:06:175
12068322359339,13sleep120-21swapper/1219:05:124
12068322359339,13sleep120-21swapper/1219:05:114
12100912357338,12sleep110-21swapper/1119:07:203
12100912357338,12sleep110-21swapper/1119:07:193
12101332356336,13sleep150-21swapper/1519:07:567
12101332356336,13sleep150-21swapper/1519:07:567
12101022355335,13sleep10-21swapper/119:07:261
12101022355335,13sleep10-21swapper/119:07:261
12100292355336,12sleep80-21swapper/819:06:2914
12100292355336,12sleep80-21swapper/819:06:2914
12102682354334,13sleep140-21swapper/1419:09:486
12102682354334,13sleep140-21swapper/1419:09:476
12101812354334,13sleep30-21swapper/319:08:329
12101812354334,13sleep30-21swapper/319:08:329
12101222354335,12sleep40-21swapper/419:07:4510
12101222354335,12sleep40-21swapper/419:07:4410
12100312354335,12sleep100-21swapper/1019:06:312
12100312354335,12sleep100-21swapper/1019:06:312
12102732352332,13sleep20-21swapper/219:09:528
12102732352332,13sleep20-21swapper/219:09:528
12102042350330,13sleep90-21swapper/919:08:5515
12102042350330,13sleep90-21swapper/919:08:5515
12101252350331,12sleep70-21swapper/719:07:4813
12101252350331,12sleep70-21swapper/719:07:4713
12100432349329,13sleep50-21swapper/519:06:4211
12100432349329,13sleep50-21swapper/519:06:4111
12099852349329,13sleep60-21swapper/619:05:5512
12099852349329,13sleep60-21swapper/619:05:5412
1210705994420,24cyclictest1529078-21ssh23:55:551
121070599435,13cyclictest0-21swapper/122:17:041
121070599435,13cyclictest0-21swapper/122:17:041
121072599412,35cyclictest1231964-21kworker/u32:0+flush-259:019:55:5113
121070599380,24cyclictest0-21swapper/119:21:201
121070599380,24cyclictest0-21swapper/119:21:191
1210725993733,4cyclictest0-21swapper/722:12:1013
1210725993733,4cyclictest0-21swapper/722:12:0913
121072599372,5cyclictest765-21systemd-journal23:43:5413
121070599360,11cyclictest0-21swapper/121:44:071
121072599352,29cyclictest1334843-21ssh21:25:3213
121070599350,10cyclictest0-21swapper/123:22:581
121070599350,10cyclictest0-21swapper/123:01:001
121070599350,10cyclictest0-21swapper/122:06:051
121070599350,10cyclictest0-21swapper/121:33:081
121070599350,10cyclictest0-21swapper/100:17:531
121074899340,33cyclictest0-21swapper/1523:30:257
121074899340,33cyclictest0-21swapper/1521:37:497
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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