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2026-03-12 - 19:52

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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  Eltec
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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 rack3slot5s.osadl.org (updated Thu Mar 12, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2434921360sleep1121650irq/29-eth0_g0_09:48:121
1869621120sleep0121650irq/29-eth0_g0_11:36:250
1869621120sleep0121650irq/29-eth0_g0_11:36:250
1211040ksoftirqd/1121750irq/30-eth0_g0_09:11:491
17312680chrt121750irq/30-eth0_g0_10:28:341
121650ksoftirqd/1121750irq/30-eth0_g0_09:26:190
121620ksoftirqd/1121650irq/29-eth0_g0_10:30:331
121620ksoftirqd/1121650irq/29-eth0_g0_10:30:331
90112570chrt121650irq/29-eth0_g0_08:45:100
252832570sleep1121750irq/30-eth0_g0_07:40:041
163612560sleep0121650irq/29-eth0_g0_11:27:440
121530ksoftirqd/1121650irq/29-eth0_g0_09:38:330
121510ksoftirqd/1121750irq/30-eth0_g0_11:46:131
121510ksoftirqd/1121650irq/29-eth0_g0_12:09:070
121500ksoftirqd/1121750irq/30-eth0_g0_11:40:050
211762490sleep0121750irq/30-eth0_g0_11:46:470
121490ksoftirqd/1121650irq/29-eth0_g0_10:05:431
155762480sleep0121650irq/29-eth0_g0_09:10:400
121480ksoftirqd/1121750irq/30-eth0_g0_12:27:521
121480ksoftirqd/1121750irq/30-eth0_g0_10:20:251
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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