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2025-05-02 - 12:51

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #6

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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  Intel
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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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack1slot6s.osadl.org (updated Fri May 02, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
845899964,29cyclictest0-21swapper/221:47:032
845899935,27cyclictest0-21swapper/222:22:342
845599937,79cyclictest0-21swapper/020:42:470
845599936,13cyclictest0-21swapper/018:07:280
845899925,29cyclictest0-21swapper/220:52:322
845899925,28cyclictest0-21swapper/218:27:412
8458999221,13cyclictest0-21swapper/217:52:362
845799914,10cyclictest13088-21munin-node18:12:341
845899905,27cyclictest0-21swapper/217:07:482
845899904,27cyclictest0-21swapper/220:02:392
845599905,9cyclictest27525-21sleep17:37:130
845799886,11cyclictest0-21swapper/118:27:121
845799885,12cyclictest0-21swapper/120:52:061
8455998810,71cyclictest0-21swapper/019:27:080
845899874,28cyclictest0-21swapper/221:27:262
845899874,28cyclictest0-21swapper/221:02:402
845899874,26cyclictest0-21swapper/219:17:422
845899864,27cyclictest0-21swapper/220:12:322
845799864,11cyclictest29808-21munin-run19:57:081
845799864,11cyclictest0-21swapper/117:27:141
845599864,10cyclictest15599-21latency_hist17:12:150
845899854,28cyclictest0-21swapper/221:47:272
845799853,9cyclictest11957-21munin-run18:12:121
845799852,11cyclictest0-21swapper/118:17:251
845799852,11cyclictest0-21swapper/118:17:251
845599854,12cyclictest0-21swapper/018:03:240
845599853,11cyclictest0-21swapper/022:12:370
8455998519,47cyclictest0-21swapper/019:57:380
845799844,10cyclictest17865-21munin-run19:32:081
845599847,13cyclictest1263-21runrttasks19:10:340
845599846,11cyclictest0-21swapper/017:02:280
845599844,73cyclictest0-21swapper/019:02:250
845599844,73cyclictest0-21swapper/019:02:250
845599844,11cyclictest0-21swapper/020:17:370
845899835,41cyclictest0-21swapper/220:17:252
845899834,36cyclictest0-21swapper/217:47:142
845599837,11cyclictest0-21swapper/019:17:100
845599836,11cyclictest0-21swapper/017:22:290
845599834,11cyclictest0-21swapper/020:37:280
845599834,10cyclictest1632-21nscd22:27:010
845599833,12cyclictest0-21swapper/021:17:340
845599833,12cyclictest0-21swapper/021:17:340
845799825,13cyclictest5264-21cat19:02:411
845799825,13cyclictest5264-21cat19:02:411
845799825,10cyclictest0-21swapper/120:22:201
845799824,12cyclictest0-21swapper/122:12:151
8457998211,8cyclictest7150irq/45-ahci20:02:081
845599826,11cyclictest0-21swapper/020:22:400
845599824,8cyclictest15358-21latency_hist21:42:040
845599824,11cyclictest0-21swapper/018:42:360
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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