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2024-04-26 - 22:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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 rack5slot3s.osadl.org (updated Fri Apr 26, 2024 12:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2500823050,6sleep230-21rcuc/207:05:132
265132242165,25sleep10-21swapper/107:08:111
265732219144,24sleep30-21swapper/307:08:573
264682204165,25sleep00-21swapper/007:07:380
1803721700,4sleep02674999cyclictest11:45:160
1157721680,4sleep02674999cyclictest10:15:280
26759999490,3cyclictest0-21swapper/211:50:542
26759998480,3cyclictest0-21swapper/210:20:502
26759996864,3cyclictest0-21swapper/210:12:032
283182470,1sleep3401ktimersoftd/310:55:123
2676699420,26cyclictest0-21swapper/310:10:013
26766994025,8cyclictest0-21swapper/311:47:403
26766994017,8cyclictest0-21swapper/309:00:473
2676699401,29cyclictest0-21swapper/311:57:563
2676699381,15cyclictest0-21swapper/310:52:353
2676699372,12cyclictest0-21swapper/309:57:213
2674999378,13cyclictest4736-21awk12:30:010
26766993618,3cyclictest0-21swapper/307:18:163
2676699360,13cyclictest0-21swapper/308:50:013
26749993611,12cyclictest1269-21munin-run09:55:020
26766993517,3cyclictest0-21swapper/308:02:593
2676699348,8cyclictest0-21swapper/308:23:313
2676699342,14cyclictest25994-21memory09:35:213
26766993319,2cyclictest0-21swapper/307:34:513
2676699331,24cyclictest0-21swapper/312:15:063
2676699331,21cyclictest0-21swapper/310:42:173
2676699331,14cyclictest0-21swapper/311:15:283
2676699331,12cyclictest0-21swapper/310:02:473
26749993310,11cyclictest18885-21awk10:35:010
26749993310,11cyclictest18885-21awk10:35:010
26766993219,3cyclictest0-21swapper/307:37:073
26766993213,9cyclictest0-21swapper/308:43:393
2676699321,29cyclictest0-21swapper/310:34:393
2676699321,29cyclictest0-21swapper/310:34:393
2676699321,16cyclictest0-21swapper/312:04:563
2676699321,16cyclictest0-21swapper/310:39:213
2676699321,14cyclictest0-21swapper/312:28:403
2676699321,14cyclictest0-21swapper/312:23:463
2676699321,14cyclictest0-21swapper/311:28:123
2676699321,14cyclictest0-21swapper/309:12:433
2676699321,12cyclictest0-21swapper/308:29:243
26766993116,3cyclictest0-21swapper/307:13:563
2676699311,28cyclictest0-21swapper/309:28:573
2676699311,21cyclictest0-21swapper/307:25:453
2676699311,19cyclictest0-21swapper/308:32:103
2676699311,15cyclictest0-21swapper/311:13:383
2676699311,14cyclictest0-21swapper/311:01:223
2676699311,13cyclictest0-21swapper/309:49:213
2676699311,11cyclictest0-21swapper/310:11:053
2676699310,15cyclictest0-21swapper/310:29:073
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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