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2025-05-09 - 05:44

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #5

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 10 highest latencies:
System rack3slot5s.osadl.org (updated Fri May 09, 2025 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
182612580sleep1121750irq/30-eth0_g0_19:49:231
249142500chrt121650irq/29-eth0_g0_22:27:421
121650500irq/29-eth0_g0_31ksoftirqd/000:09:440
121650490irq/29-eth0_g0_31ksoftirqd/022:40:200
175282470sleep0121650irq/29-eth0_g0_21:57:160
121650470irq/29-eth0_g0_31ksoftirqd/023:27:450
121650470irq/29-eth0_g0_1893-21runrttasks20:41:590
121650470irq/29-eth0_g0_1893-21runrttasks20:41:590
121650470irq/29-eth0_g0_13-21kworker/0:121:14:090
121470ksoftirqd/1121750irq/30-eth0_g0_21:40:291
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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