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2025-05-05 - 00:31

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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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 rackeslot6s.osadl.org (updated Sun May 04, 2025 12:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
36836699721,57cyclictest0-21swapper/008:50:130
36837099681,46cyclictest0-21swapper/208:30:012
36836699659,20cyclictest25250irq/422-mmc107:25:020
36836699601,3cyclictest0-21swapper/011:50:120
368366995951,5cyclictest370298-21munin-plugin-st07:20:000
368366995551,2cyclictest0-21swapper/007:45:000
36836799542,13cyclictest379631-21gpgv08:15:011
36836799542,13cyclictest379631-21gpgv08:15:001
368366995443,8cyclictest0-21swapper/007:50:000
368367995238,10cyclictest231ktimers/107:10:161
368370994934,11cyclictest383938-21sendmail08:40:012
36836699494,9cyclictest0-21swapper/012:40:010
368366994934,11cyclictest0-21swapper/007:25:000
368366994914,30cyclictest0-21swapper/011:05:300
368366994910,35cyclictest0-21swapper/009:55:350
36836699485,14cyclictest369186-21munin-node07:15:010
368370994735,7cyclictest404322-21sendmail10:40:002
368367994737,6cyclictest400882-21grep10:15:301
368367994716,26cyclictest22-21rcuc/112:00:321
36836799471,18cyclictest384775-21kworker/u8:3+ext4-rsv-conversion09:25:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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