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2024-11-22 - 04:25

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #4

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 rack8slot4s.osadl.org (updated Fri Nov 22, 2024 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10213662228198,19sleep30-21swapper/319:07:283
10191002223166,17sleep00-21swapper/019:05:080
10213022222168,18sleep70-21swapper/719:06:357
10214212216186,19sleep10-21swapper/119:08:141
10212562211178,21sleep60-21swapper/619:05:556
10212342209175,22sleep40-21swapper/419:05:364
10214602207172,22sleep20-21swapper/219:08:472
10213292207174,21sleep50-21swapper/519:06:595
1021777992525,0cyclictest0-21swapper/621:50:136
1021770992523,1cyclictest1123425-21idleruntime-cro22:05:004
1021770992523,1cyclictest1123425-21idleruntime-cro22:05:004
102176199250,24cyclictest1091737-21perf21:10:012
102175699250,2cyclictest1190183-21latency_hist00:04:590
1021780992422,1cyclictest0-21swapper/721:10:137
1021761992422,1cyclictest1169834-21apt-get23:25:112
1021761992422,1cyclictest1146978-21apt-get22:45:112
1021780992322,1cyclictest0-21swapper/722:20:017
102178099230,22cyclictest0-21swapper/723:30:177
102178099230,1cyclictest0-21swapper/720:55:007
1021777992323,0cyclictest0-21swapper/619:50:126
102177799231,21cyclictest761rcuc/623:05:136
102177499230,22cyclictest0-21swapper/500:20:125
102177099230,23cyclictest1176738-21ntpq23:35:184
1021765992321,1cyclictest1158405-21apt-get23:05:123
102176599230,1cyclictest1115280-21apt-get21:50:143
102176199232,20cyclictest673-21in:imuxsock21:00:002
1021761992321,1cyclictest1132697-21apt-get22:20:122
1021761992321,1cyclictest1114857-21munin-run21:50:002
102176199230,2cyclictest1074585-21grep20:40:012
102176199230,22cyclictest1152677-21apt-get22:55:102
102176199230,22cyclictest1083134-21cron20:55:002
102175999230,1cyclictest1112006-21munin-run21:45:011
102175699230,22cyclictest1204740-21munin-run00:30:000
102175699230,22cyclictest1068802-21date20:30:000
102175699230,22cyclictest1045496-21munin-run19:50:000
102175699230,21cyclictest1135546-21apt-get22:25:100
102178099229,0cyclictest0-21swapper/721:47:597
1021780992221,0cyclictest0-21swapper/721:40:127
102178099220,22cyclictest851rcuc/722:30:007
102178099220,21cyclictest1077868-21apt-get20:45:127
102178099220,21cyclictest0-21swapper/720:25:107
102178099220,21cyclictest0-21swapper/719:40:157
102178099220,21cyclictest0-21swapper/719:20:127
102178099220,21cyclictest0-21swapper/719:15:127
102178099220,1cyclictest0-21swapper/700:25:017
102178099220,0cyclictest0-21swapper/722:20:127
1021777992221,1cyclictest0-21swapper/622:10:136
1021777992221,1cyclictest0-21swapper/621:10:126
1021777992221,1cyclictest0-21swapper/620:50:016
102177799220,21cyclictest0-21swapper/621:30:006
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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