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2024-05-25 - 10:01

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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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 Sat May 25, 2024 00:45:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18784152134127,5sleep130-21swapper/135
18785112129122,5sleep90-21swapper/919
18783032129123,4sleep150-21swapper/157
18754122125117,5sleep120-21swapper/124
18795682123115,5sleep70-21swapper/717
18785722123115,5sleep100-21swapper/102
18782162123115,5sleep50-21swapper/515
18784262122114,5sleep190-21swapper/1911
18783022122115,5sleep140-21swapper/146
18783192121114,5sleep40-21swapper/414
18782172120113,5sleep60-21swapper/616
18782352115111,2sleep160-21swapper/168
18796672108101,5sleep80-21swapper/818
134711030,100low-memory-moni0-21swapper/179
20299962800,0sleep20-21swapper/212
19057502770,0sleep140-21swapper/146
20474562710,0sleep16265-21kswapd08
19106752690,0sleep60-21swapper/616
20518412650,0sleep14265-21kswapd06
21714842640,0sleep14265-21kswapd06
21714842640,0sleep14265-21kswapd06
20798282620,0sleep180-21swapper/1810
21716792610,0sleep10-21swapper/11
21716792610,0sleep10-21swapper/11
1880146995932,26cyclictest0-21swapper/113
1880133995920,39cyclictest0-21swapper/717
19285692580,0sleep10-21swapper/11
1880173995816,41cyclictest2098615-40tracker-miner-f11
1880173995618,38cyclictest0-21swapper/1911
188017399560,56cyclictest0-21swapper/1911
187850525640,11sleep30-21swapper/313
1880148995554,0cyclictest2026219-21kworker/12:0+mm_percpu_wq4
13471550,52low-memory-moni0-21swapper/11
20774262540,0sleep120-21swapper/124
20213702540,0sleep150-21swapper/157
20213702540,0sleep150-21swapper/157
1880133995411,42cyclictest0-21swapper/717
1087920540,53pw-data-loop0-21swapper/212
1880158995314,39cyclictest0-21swapper/157
1880158995221,30cyclictest0-21swapper/157
20387402510,0sleep80-21swapper/818
1880114995150,0cyclictest2051807-21kworker/1:2+events1
21202512500,0sleep90-21swapper/919
188017399509,40cyclictest0-21swapper/1911
187899524932,11sleep110-21swapper/113
187849924933,10sleep180-21swapper/1810
188016899480,48cyclictest0-21swapper/1810
1880148994847,1cyclictest2098615-40tracker-miner-f4
1880146994823,25cyclictest0-21swapper/113
21103842470,0sleep00-21swapper/00
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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