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2025-02-13 - 07:59

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #a, 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 20 highest latencies:
System rackaslot5s.osadl.org (updated Wed Feb 12, 2025 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811280,0rcu_preempt896-21kworker/1:310:13:021
811240,0rcu_preempt19-21ksoftirqd/110:37:141
811180,0rcu_preempt19-21ksoftirqd/112:19:071
811070,0rcu_preempt19-21ksoftirqd/111:39:161
811070,0rcu_preempt19-21ksoftirqd/111:39:161
811040,0rcu_preempt19-21ksoftirqd/110:20:431
811000,0rcu_preempt19-21ksoftirqd/112:18:531
81980,0rcu_preempt19-21ksoftirqd/111:56:351
81960,0rcu_preempt54-21kswapd009:46:551
10050740,0irq/346-484840054-21kswapd012:19:450
10050710,0irq/346-484840054-21kswapd010:50:000
10050710,0irq/346-4848400111rcuc/010:05:040
10050670,0irq/346-48484000-21swapper/009:39:030
10050660,0irq/346-48484000-21swapper/011:08:400
10050620,0irq/346-484840054-21kswapd011:01:470
10050620,0irq/346-484840024512-1kworker/1:1H10:18:481
10050620,0irq/346-484840024512-1kworker/1:1H10:18:481
10050610,0irq/346-484840010878-1kworker/1:2H10:45:401
81600,0rcu_preempt753-21rngd10:24:560
81600,0rcu_preempt3-21ksoftirqd/007:59:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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