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2024-04-25 - 08:55

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 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 rackcslot7s.osadl.org (updated Thu Apr 25, 2024 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1623991560,39rtkit-daemon26-21ksoftirqd/123:41:111
71682821080,8sleep00-21swapper/019:10:010
716951991065,14cyclictest26-21ksoftirqd/122:48:251
716650210690,9sleep30-21swapper/319:09:003
71695799972,89cyclictest880726-21firefox00:18:573
716957999681,11cyclictest722813-21sh19:30:123
71695799963,88cyclictest1753-21gnome-shell00:33:253
71695199962,6cyclictest0-21swapper/120:56:361
716951999620,70cyclictest881251-21Softwar~cThread22:19:451
71695199942,89cyclictest0-21swapper/121:40:571
71695199942,89cyclictest0-21swapper/121:36:371
71695199942,88cyclictest681882-21kworker/1:119:30:131
71695199942,88cyclictest0-21swapper/123:00:221
71695199942,88cyclictest0-21swapper/119:50:131
71695199942,88cyclictest0-21swapper/100:33:481
71641729457,9sleep20-21swapper/219:06:022
8059462930,6sleep10-21swapper/123:30:241
71695799932,87cyclictest0-21swapper/320:02:013
71695799932,86cyclictest724815-21apt19:40:083
71695799932,86cyclictest724815-21apt19:40:083
71695199932,88cyclictest0-21swapper/120:26:461
71695199932,87cyclictest0-21swapper/123:46:211
71695199932,87cyclictest0-21swapper/122:26:171
71695199932,87cyclictest0-21swapper/120:49:111
71695199932,87cyclictest0-21swapper/119:38:421
71695199932,6cyclictest0-21swapper/122:54:251
71695199932,6cyclictest0-21swapper/122:54:251
71656529356,9sleep10-21swapper/119:07:551
716957999284,5cyclictest0-21swapper/320:25:333
71695799922,7cyclictest0-21swapper/321:35:323
716953999217,52cyclictest881251-21Softwar~cThread00:19:222
716951999284,5cyclictest0-21swapper/122:32:091
71695199922,87cyclictest0-21swapper/123:22:391
71695199922,6cyclictest0-21swapper/121:11:521
716957999183,5cyclictest0-21swapper/320:56:363
71695799912,86cyclictest0-21swapper/320:20:343
71695199912,87cyclictest0-21swapper/100:36:481
71695199912,86cyclictest0-21swapper/123:13:421
71695199912,86cyclictest0-21swapper/120:52:211
71695199912,86cyclictest0-21swapper/120:52:211
71695199912,85cyclictest0-21swapper/123:18:291
71695199912,85cyclictest0-21swapper/123:18:291
71695199912,6cyclictest0-21swapper/122:24:211
71695199912,6cyclictest0-21swapper/120:00:321
71695199911,87cyclictest26-21ksoftirqd/122:35:271
716957999082,5cyclictest0-21swapper/321:05:333
716951999083,4cyclictest0-21swapper/120:32:391
716951999083,4cyclictest0-21swapper/120:13:131
716951999083,4cyclictest0-21swapper/119:42:321
716951999083,4cyclictest0-21swapper/119:42:321
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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