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2025-05-02 - 12:43

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 50 highest latencies:
System rackaslot5s.osadl.org (updated Fri May 02, 2025 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81800,0rcu_preempt0-21swapper/122:24:471
81770,0rcu_preempt5551-1kworker/1:1H19:32:491
81740,0rcu_preempt19-21ksoftirqd/123:38:181
81740,0rcu_preempt19-21ksoftirqd/123:38:181
81710,0rcu_preempt19-21ksoftirqd/100:22:041
81690,0rcu_preempt19-21ksoftirqd/122:31:411
81680,0rcu_preempt19-21ksoftirqd/120:15:081
81680,0rcu_preempt0-21swapper/123:13:291
10050680,0irq/346-484840025761-1kworker/0:1H22:46:520
81670,0rcu_preempt19-21ksoftirqd/122:42:181
81670,0rcu_preempt19-21ksoftirqd/121:39:441
81670,0rcu_preempt19-21ksoftirqd/120:23:061
81670,0rcu_preempt19-21ksoftirqd/120:23:061
81670,0rcu_preempt19-21ksoftirqd/120:08:031
81670,0rcu_preempt0-21swapper/122:48:051
81670,0rcu_preempt0-21swapper/121:37:441
81660,0rcu_preempt19-21ksoftirqd/123:54:401
81660,0rcu_preempt0-21swapper/119:13:141
81650,0rcu_preempt3-21ksoftirqd/022:53:160
81650,0rcu_preempt3-21ksoftirqd/020:53:220
81650,0rcu_preempt3-21ksoftirqd/020:48:120
81650,0rcu_preempt19-21ksoftirqd/121:13:001
81650,0rcu_preempt19-21ksoftirqd/100:04:041
81640,0rcu_preempt19-21ksoftirqd/123:10:051
81640,0rcu_preempt19-21ksoftirqd/122:59:411
81640,0rcu_preempt19-21ksoftirqd/122:18:001
81640,0rcu_preempt19-21ksoftirqd/121:08:271
81640,0rcu_preempt19-21ksoftirqd/119:33:171
9950630,0irq/345-4848400171rcuc/123:46:171
81630,0rcu_preempt3-21ksoftirqd/021:03:180
81630,0rcu_preempt19-21ksoftirqd/121:18:061
81630,0rcu_preempt19-21ksoftirqd/100:14:051
81620,0rcu_preempt54-21kswapd000:31:020
81620,0rcu_preempt3267-21apt-get21:43:031
81620,0rcu_preempt19-21ksoftirqd/123:34:311
81620,0rcu_preempt19-21ksoftirqd/122:10:361
81620,0rcu_preempt19-21ksoftirqd/122:00:281
81620,0rcu_preempt19-21ksoftirqd/121:55:051
81610,0rcu_preempt3-21ksoftirqd/022:33:180
81610,0rcu_preempt19-21ksoftirqd/123:49:401
81610,0rcu_preempt19-21ksoftirqd/123:28:021
81610,0rcu_preempt19-21ksoftirqd/123:25:091
81610,0rcu_preempt19-21ksoftirqd/122:35:491
81610,0rcu_preempt19-21ksoftirqd/121:03:011
81610,0rcu_preempt19-21ksoftirqd/119:08:021
81610,0rcu_preempt19-21ksoftirqd/100:10:371
10050610,0irq/346-484840054-21kswapd022:55:571
81600,0rcu_preempt3-21ksoftirqd/023:23:510
81600,0rcu_preempt3-21ksoftirqd/023:04:530
81600,0rcu_preempt22179-21apt-get23:18:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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