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2025-02-05 - 09:48

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 05, 2025 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81870,0rcu_preempt19-21ksoftirqd/123:59:041
81720,0rcu_preempt19-21ksoftirqd/119:19:051
81700,0rcu_preempt54-21kswapd019:44:041
81690,0rcu_preempt19-21ksoftirqd/123:49:251
81650,0rcu_preempt3-21ksoftirqd/021:09:320
81640,0rcu_preempt19-21ksoftirqd/122:39:171
10050610,0irq/346-484840054-21kswapd021:59:070
7832600,0chrt10050irq/346-484840019:29:550
10050590,0irq/346-484840032039-1kworker/0:0H21:15:340
302212570,0chrt10050irq/346-484840019:22:510
10050570,0irq/346-484840018273-21ssh22:19:070
10050570,0irq/346-484840010719-1kworker/0:2H22:09:170
81560,0rcu_preempt3-21ksoftirqd/021:41:550
81560,0rcu_preempt3-21ksoftirqd/020:24:180
81550,0rcu_preempt9237-21ping19:59:180
81550,0rcu_preempt3-21ksoftirqd/000:09:260
10050550,0irq/346-48484005446-1kworker/0:0H22:49:320
81540,0rcu_preempt9237-21ping20:09:230
10050530,0irq/346-48484002485-1kworker/0:0H23:27:450
81520,0rcu_preempt3-21ksoftirqd/023:14:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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