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2024-07-27 - 07:50

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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.

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 20 highest latencies:
System rackeslot4s.osadl.org (updated Sat Jul 27, 2024 00:44:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1682525995551,3cyclictest73-21kswapd023:55:003
1682518994841,5cyclictest1860447-21latency_hist21:45:011
1682525994541,3cyclictest1744422-21kworker/u8:1+events_unbound20:40:043
1682522994541,3cyclictest73-21kswapd022:40:002
1682522994437,5cyclictest2065270-21cp00:00:012
1682515994440,3cyclictest1890501-21kworker/u8:3+flush-259:022:05:140
1682522994138,2cyclictest1964482-21kworker/u8:0+events_unbound23:05:242
1682522994138,2cyclictest1964482-21kworker/u8:0+events_unbound23:05:232
1682525993936,2cyclictest1898561-21kworker/u8:2+flush-259:022:29:383
1682522993933,4cyclictest1801684-21latency_hist21:05:012
1682518993934,4cyclictest73-21kswapd000:10:001
1682522993834,3cyclictest2055270-21kworker/u8:3+events_unbound00:25:162
1682522993834,3cyclictest2027434-21kworker/u8:2+events_unbound23:50:202
1682522993832,4cyclictest2019903-21latency_hist23:30:002
1682522993731,4cyclictest1891023-21latency_hist22:05:002
1682515993734,2cyclictest17288962sleep019:55:000
1682515993632,3cyclictest1838051-21apt-get21:30:140
1682515993531,3cyclictest1972610-21kworker/u8:1+flush-259:023:04:240
1682522993431,2cyclictest2776117-21kworker/u8:0+events_unbound19:40:132
1682518993429,3cyclictest1791611-21apt-get20:55:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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