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2024-12-10 - 07:04

OSADL QA Farm on Real-time of Mainline Linux

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

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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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 rackcslot5s.osadl.org (updated Tue Dec 10, 2024 00:59:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4415:03:146432
45,15:02:306431
015:02:306427
0,15:02:306426
0,15:02:306425
0,15:02:306424
0,15:02:306423
0,15:02:306422
0,15:02:306421
0,15:02:306420
0,15:02:306419
0,15:02:306418
0,15:02:306417
0,15:02:306416
0,15:02:306415
0,15:02:306414
0,15:02:306413
0,15:02:306412
0,15:02:306411
0,15:02:306410
0,15:02:306409
0,15:02:306408
0,15:02:306407
0,15:02:306406
0,15:02:306405
0,15:02:306404
0,15:02:306403
0,15:02:306402
0,15:02:306401
0,15:02:306400
0,15:02:306399
0,15:02:306398
0,15:02:306397
0,15:02:306396
0,15:02:306395
0,15:02:306394
0,15:02:306393
0,15:02:306392
0,15:02:306391
0,15:02:306390
0,15:02:306389
0,15:02:306388
0,15:02:306387
0,15:02:306386
0,15:02:306385
0,15:02:306384
0,15:02:306383
0,15:02:306382
0,15:02:306381
0,15:02:306380
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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