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2024-12-10 - 12:30

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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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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 rack0slot6s.osadl.org (updated Tue Dec 10, 2024 00:45:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25851952151145,4sleep170-21swapper/1719:08:599
25834872148141,5sleep150-21swapper/1519:08:387
25832772134127,5sleep130-21swapper/1319:07:355
25834582129122,5sleep120-21swapper/1219:08:144
25831812128121,5sleep140-21swapper/1419:06:576
25834192126119,5sleep30-21swapper/319:07:4513
25834212118101,11sleep50-21swapper/519:07:4715
263893021060,0sleep50-21swapper/522:20:2315
25826982105100,2sleep180-21swapper/1819:05:1910
25831862103100,2sleep190-21swapper/1919:07:0111
25834232102100,1sleep70-21swapper/719:07:4917
154811020,99low-memory-moni0-21swapper/619:07:1416
308617920910,0pw-data-loop2659249-40tracker-miner-f23:40:121
15481860,83low-memory-moni0-21swapper/1619:06:148
26160842760,0sleep160-21swapper/1620:53:068
26390432690,0sleep80-21swapper/822:21:4518
26367132690,0sleep40-21swapper/422:14:2114
26619462660,0sleep19264-21kswapd023:52:0511
2585710996415,49cyclictest0-21swapper/819:19:0718
26442252620,0sleep11264-21kswapd022:43:103
26428652620,0sleep140-21swapper/1422:37:136
2585710996129,32cyclictest0-21swapper/819:20:3918
258341726042,12sleep10-21swapper/119:07:431
258526725942,10sleep100-21swapper/1019:09:522
258295725840,1sleep90-21swapper/919:06:3119
2585715995728,29cyclictest0-21swapper/1000:21:152
26529652560,0sleep180-21swapper/1823:15:4010
2585698995520,0cyclictest0-21swapper/419:25:1314
258520525539,10sleep40-21swapper/419:09:0614
26148432530,0sleep6771rcuc/620:48:3516
258520325337,10sleep20-21swapper/219:09:0412
258341425336,11sleep00-21swapper/019:07:420
2585690995218,0cyclictest0-21swapper/219:25:1212
26683992510,0sleep120-21swapper/1200:15:394
26492862510,0sleep90-21swapper/923:02:1019
258574399510,50cyclictest0-21swapper/1821:13:1210
2585743994920,0cyclictest0-21swapper/1821:18:5610
2585743994919,30cyclictest0-21swapper/1821:34:0310
2585743994919,30cyclictest0-21swapper/1819:18:2210
2585743994918,31cyclictest0-21swapper/1822:52:0710
2585743994918,30cyclictest0-21swapper/1823:34:4410
2585743994918,30cyclictest0-21swapper/1822:02:5410
2585743994918,30cyclictest0-21swapper/1822:02:5410
2585743994917,32cyclictest0-21swapper/1820:20:3210
2585743994917,31cyclictest0-21swapper/1823:51:3210
2585743994917,31cyclictest0-21swapper/1822:15:1910
2585743994917,31cyclictest0-21swapper/1821:47:1010
2585743994917,31cyclictest0-21swapper/1820:03:5110
2585725994918,31cyclictest0-21swapper/1320:22:425
258271424933,10sleep110-21swapper/1119:05:323
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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