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2025-04-02 - 05:06

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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.

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 rackeslot6s.osadl.org (updated Wed Apr 02, 2025 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14092769911781,27cyclictest391ktimers/300:40:013
1409270996623,8cyclictest0-21swapper/020:35:290
140927099661,28cyclictest1439002-21munin-node22:20:120
140927099651,25cyclictest0-21swapper/021:55:020
1409270996434,26cyclictest1426137-21cron20:54:590
1409274996357,4cyclictest30-21rcuc/221:35:012
1409274996357,4cyclictest30-21rcuc/221:35:012
1409273996239,8cyclictest0-21swapper/121:30:001
1409273996210,22cyclictest0-21swapper/123:30:001
1409270996228,3cyclictest0-21swapper/000:35:270
1409270996223,8cyclictest0-21swapper/021:20:240
140927099611,2cyclictest0-21swapper/021:00:000
1409270995927,8cyclictest1453616-21grep00:00:300
140927099591,4cyclictest1412011-21grep19:20:300
1409270995825,9cyclictest0-21swapper/023:40:240
1409270995824,5cyclictest0-21swapper/000:30:220
1409270995821,13cyclictest0-21swapper/021:35:010
1409270995733,20cyclictest20950irq/209-8000000.ethernet21:40:010
1409270995733,20cyclictest20950irq/209-8000000.ethernet21:40:010
1409270995625,4cyclictest20950irq/209-8000000.ethernet22:30:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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