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2024-09-16 - 01:22

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 Sun Sep 15, 2024 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31409991066,17cyclictest0-21swapper/207:10:222
3140899924,27cyclictest0-21swapper/110:27:291
3140999914,26cyclictest0-21swapper/206:45:492
31409999018,12cyclictest0-21swapper/210:46:372
3140999894,29cyclictest0-21swapper/210:15:472
3140999894,24cyclictest11939-21tr08:20:442
3140999886,22cyclictest0-21swapper/208:30:372
3140999886,22cyclictest0-21swapper/208:30:372
3140999884,26cyclictest0-21swapper/206:50:342
3140999884,25cyclictest0-21swapper/209:54:422
3140999884,25cyclictest0-21swapper/207:00:222
3140999884,22cyclictest0-21swapper/206:25:242
3140999883,25cyclictest0-21swapper/205:54:022
3140999883,25cyclictest0-21swapper/205:54:022
3140999874,25cyclictest0-21swapper/210:05:492
31409998718,11cyclictest20965-21sort08:40:312
3140999864,22cyclictest0-21swapper/206:25:472
31409998517,12cyclictest0-21swapper/211:00:242
3140999844,26cyclictest0-21swapper/208:19:262
3140999834,27cyclictest0-21swapper/209:55:422
3140999834,27cyclictest0-21swapper/209:55:422
3140999824,24cyclictest0-21swapper/210:21:442
31409998218,13cyclictest0-21swapper/208:27:382
3140999814,27cyclictest0-21swapper/206:05:462
3140999814,26cyclictest0-21swapper/211:15:322
3140999814,26cyclictest0-21swapper/211:15:322
3140999813,23cyclictest0-21swapper/209:45:272
3140999813,23cyclictest0-21swapper/207:30:302
31409998129,44cyclictest26790-21cut08:50:372
31409998126,48cyclictest14969-21cat09:30:412
31409998123,50cyclictest1304-21runrttasks10:30:342
31409998111,11cyclictest1304-21runrttasks08:10:492
3140699813,70cyclictest1304-21runrttasks07:15:330
3140999805,23cyclictest0-21swapper/205:55:362
3140999804,69cyclictest0-21swapper/207:50:202
3140999804,69cyclictest0-21swapper/207:50:202
3140999804,68cyclictest0-21swapper/207:15:422
3140999804,25cyclictest0-21swapper/206:35:452
3140999804,14cyclictest0-21swapper/209:35:322
3140999803,69cyclictest13463-21sadc09:30:162
3140999803,25cyclictest0-21swapper/207:10:342
3140999803,25cyclictest0-21swapper/207:10:342
31409998025,48cyclictest17496-21fschecks_count10:40:322
31409998016,57cyclictest0-21swapper/207:25:482
3140999794,66cyclictest31731-21munin-run11:10:112
3140999794,14cyclictest0-21swapper/208:45:342
3140999793,25cyclictest0-21swapper/208:10:182
31409997913,9cyclictest0-21swapper/210:25:302
3140699797,65cyclictest0-21swapper/009:24:140
3140699794,68cyclictest0-21swapper/009:50:430
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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