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2023-04-02 - 10:01

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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 
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ARM Broadcom BCM2711 @1500 MHz, Linux 5.10.52-rt47-v7l (Profile)

Latency plot of shadow in rack #7, slot #4
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -n -a0-2 -p99 -i200 -h400 -t3 -q
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 376 highest latencies:
System rack7slot4s.osadl.org (updated Sun Apr 02, 2023 00:45:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29127997019,25cyclictest12-21ksoftirqd/022:55:160
2914899561,8cyclictest0-21swapper/019:15:170
2914899521,2cyclictest16098-21apt-get00:35:220
2914899521,2cyclictest0-21swapper/021:55:160
2914899511,2cyclictest32221-21apt-get00:25:190
2912799502,32cyclictest17566-21ssh23:20:170
2914899494,26cyclictest14846-21ssh23:55:180
2914899491,2cyclictest0-21swapper/023:25:150
2914899482,7cyclictest0-21swapper/020:05:170
2914899481,9cyclictest0-21swapper/019:45:190
2914899471,3cyclictest0-21swapper/023:05:170
2914899471,2cyclictest7914-21apt-get00:30:200
2914899471,2cyclictest31325-21apt-get21:20:180
2914899471,2cyclictest0-21swapper/020:45:190
2914899471,2cyclictest0-21swapper/019:20:170
2914899461,2cyclictest0-21swapper/021:00:160
2914899451,6cyclictest0-21swapper/019:30:170
2914899451,2cyclictest0-21swapper/023:15:170
2914899443,28cyclictest19733-21ssh21:50:160
2914899441,3cyclictest0-21swapper/020:40:180
2914899441,2cyclictest2482-21apt-get22:35:170
2914899441,2cyclictest0-21swapper/022:50:170
2914899440,4cyclictest25982-21apt-get22:30:180
2914899432,6cyclictest0-21swapper/019:25:170
2914899431,2cyclictest0-21swapper/022:45:180
2914899431,2cyclictest0-21swapper/020:35:190
2914899430,3cyclictest17140-21apt-get22:25:220
2914899430,2cyclictest0-21swapper/020:55:150
2912799433,21cyclictest13935-21ssh22:05:180
2914899421,6cyclictest0-21swapper/023:30:170
2914899421,2cyclictest3081-21apt-get20:25:200
2914899421,2cyclictest25472-21apt-get21:35:160
2914899420,3cyclictest31856-21apt-get00:05:180
2914899411,2cyclictest0-21swapper/020:00:170
2914899410,2cyclictest6913-21ssh22:19:000
2914899401,7cyclictest0-21swapper/019:55:180
2914899401,4cyclictest0-21swapper/021:25:180
2914899401,3cyclictest0-21swapper/020:30:180
2914899401,2cyclictest0-21swapper/022:04:000
2914899400,2cyclictest30137-21ssh21:19:000
2914899391,4cyclictest0-21swapper/000:15:590
2914899391,2cyclictest8174-21apt-get22:20:200
2914899391,2cyclictest16534-21apt-get21:30:170
2914899391,2cyclictest0-21swapper/019:38:000
2914899391,2cyclictest0-21swapper/000:25:000
2914899390,2cyclictest7983-21ssh21:42:000
2914899381,4cyclictest0-21swapper/023:50:000
2914899381,4cyclictest0-21swapper/019:43:590
2914899381,3cyclictest0-21swapper/023:55:000
2914899381,3cyclictest0-21swapper/021:05:180
2914899381,3cyclictest0-21swapper/020:50:150
2914899381,3cyclictest0-21swapper/000:12:000
2914899381,2cyclictest0-21swapper/020:10:200
2914899371,6cyclictest0-21swapper/023:10:210
2914899371,4cyclictest0-21swapper/021:11:590
2914899371,2cyclictest0-21swapper/022:10:590
2914899361,3cyclictest0-21swapper/020:23:000
2914899361,3cyclictest0-21swapper/019:51:000
2914899361,3cyclictest0-21swapper/019:13:590
2914899361,2cyclictest20662-21apt-get23:40:190
2914899351,6cyclictest27401-21cat00:00:420
2914899351,2cyclictest0-21swapper/022:43:590
2914899341,3cyclictest0-21swapper/020:15:180
2914899330,9cyclictest14890-21awk23:00:270
2914899321,2cyclictest0-21swapper/023:35:150
2914899320,3cyclictest10890-21apt-get21:45:180
2914899260,6cyclictest29197-21latency_hist19:10:010
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*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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