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2024-05-21 - 19:21

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 Tue May 21, 2024 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81890,0rcu_preempt3-21ksoftirqd/010:40:340
81890,0rcu_preempt0-21swapper/009:28:590
81880,0rcu_preempt3-21ksoftirqd/008:35:310
81880,0rcu_preempt3-21ksoftirqd/008:35:310
81770,0rcu_preempt3-21ksoftirqd/007:59:580
102312770,0chrt9950irq/345-484840011:50:400
81760,0rcu_preempt23926-1kworker/1:4H09:10:351
10050750,0irq/346-484840028059-1kworker/0:1H10:01:090
10050750,0irq/346-484840014006-1kworker/0:0H10:28:330
81710,0rcu_preempt3-21ksoftirqd/011:37:280
81690,0rcu_preempt3-21ksoftirqd/009:32:390
52732690,0sleep09950irq/345-484840011:00:350
81680,0rcu_preempt3-21ksoftirqd/011:10:360
81680,0rcu_preempt19-21ksoftirqd/107:20:121
81670,0rcu_preempt3-21ksoftirqd/011:25:170
81660,0rcu_preempt3-21ksoftirqd/008:10:070
81650,0rcu_preempt3-21ksoftirqd/010:45:080
81630,0rcu_preempt3-21ksoftirqd/009:37:160
81630,0rcu_preempt3-21ksoftirqd/007:50:090
81620,0rcu_preempt3-21ksoftirqd/012:35:070
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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