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2026-05-22 - 09:06

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Fri May 22, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81890,0rcu_preempt19-21ksoftirqd/123:28:151
81800,0rcu_preempt3-21ksoftirqd/022:43:110
81730,0rcu_preempt3-21ksoftirqd/022:26:190
81730,0rcu_preempt19-21ksoftirqd/123:25:231
81730,0rcu_preempt19-21ksoftirqd/121:23:511
81720,0rcu_preempt3-21ksoftirqd/023:42:130
81720,0rcu_preempt3-21ksoftirqd/022:55:230
81700,0rcu_preempt3-21ksoftirqd/000:36:320
81690,0rcu_preempt19-21ksoftirqd/121:51:251
9950660,0irq/345-484840019-21ksoftirqd/121:13:131
81660,0rcu_preempt3-21ksoftirqd/023:57:590
81660,0rcu_preempt3-21ksoftirqd/021:25:320
9950650,0irq/345-4848400181ktimersoftd/122:21:311
81650,0rcu_preempt19-21ksoftirqd/121:43:231
81650,0rcu_preempt19-21ksoftirqd/121:38:071
81640,0rcu_preempt851-21rngd23:57:021
81640,0rcu_preempt19-21ksoftirqd/122:46:411
81630,0rcu_preempt3-21ksoftirqd/022:59:530
81630,0rcu_preempt19-21ksoftirqd/122:58:081
10050630,0irq/346-484840022646-1kworker/1:1H00:26:351
10050630,0irq/346-48484001695-21ssh22:24:221
81620,0rcu_preempt3-21ksoftirqd/023:23:070
81610,0rcu_preempt3-21ksoftirqd/020:13:070
81610,0rcu_preempt19-21ksoftirqd/123:58:221
81610,0rcu_preempt19-21ksoftirqd/123:38:411
81610,0rcu_preempt19-21ksoftirqd/122:55:281
81610,0rcu_preempt19-21ksoftirqd/100:13:281
81600,0rcu_preempt19-21ksoftirqd/123:48:261
81600,0rcu_preempt19-21ksoftirqd/121:53:211
81600,0rcu_preempt19-21ksoftirqd/119:18:431
9950590,0irq/345-48484003361-1kworker/1:1H21:33:061
81590,0rcu_preempt19-21ksoftirqd/123:05:021
81590,0rcu_preempt19-21ksoftirqd/123:05:021
81590,0rcu_preempt19-21ksoftirqd/120:23:181
81590,0rcu_preempt19-21ksoftirqd/119:55:061
81580,0rcu_preempt19-21ksoftirqd/122:03:181
81580,0rcu_preempt19-21ksoftirqd/121:20:161
9950570,0irq/345-4848400181ktimersoftd/100:09:351
81560,0rcu_preempt3-21ksoftirqd/019:48:160
81560,0rcu_preempt3-21ksoftirqd/000:13:110
81560,0rcu_preempt19-21ksoftirqd/120:33:531
9950550,0irq/345-4848400171rcuc/100:28:221
81550,0rcu_preempt3-21ksoftirqd/023:04:320
81550,0rcu_preempt3-21ksoftirqd/023:04:320
81550,0rcu_preempt3-21ksoftirqd/021:35:320
81550,0rcu_preempt3-21ksoftirqd/020:58:210
81550,0rcu_preempt3-21ksoftirqd/019:08:130
81540,0rcu_preempt3-21ksoftirqd/023:13:110
81540,0rcu_preempt3-21ksoftirqd/023:13:110
81540,0rcu_preempt3-21ksoftirqd/022:40:490
81540,0rcu_preempt3-21ksoftirqd/022:13:020
81540,0rcu_preempt3-21ksoftirqd/021:38:050
81540,0rcu_preempt19-21ksoftirqd/123:34:001
81540,0rcu_preempt19-21ksoftirqd/123:21:131
81540,0rcu_preempt19-21ksoftirqd/123:13:261
81540,0rcu_preempt19-21ksoftirqd/123:13:261
81540,0rcu_preempt19-21ksoftirqd/122:48:201
81540,0rcu_preempt19-21ksoftirqd/121:30:491
81540,0rcu_preempt19-21ksoftirqd/120:03:051
81530,0rcu_preempt3-21ksoftirqd/023:55:220
81530,0rcu_preempt28626-21kworker/1:223:08:221
9950520,0irq/345-484840028344-1kworker/0:2H23:28:030
9950520,0irq/345-484840027577-1kworker/1:2H00:34:201
81520,0rcu_preempt3-21ksoftirqd/023:11:030
81520,0rcu_preempt3-21ksoftirqd/022:18:140
81520,0rcu_preempt3-21ksoftirqd/021:28:190
81520,0rcu_preempt3-21ksoftirqd/020:48:510
81520,0rcu_preempt3-21ksoftirqd/000:03:220
81520,0rcu_preempt28667-21kworker/1:020:13:401
81520,0rcu_preempt19-21ksoftirqd/122:33:071
9950510,0irq/345-48484000-21swapper/123:45:331
9950510,0irq/345-48484000-21swapper/022:51:070
81510,0rcu_preempt3-21ksoftirqd/023:48:220
81510,0rcu_preempt3-21ksoftirqd/020:18:220
10050510,0irq/346-484840022647-1kworker/0:2H00:26:550
81500,0rcu_preempt3-21ksoftirqd/021:53:150
81500,0rcu_preempt3-21ksoftirqd/021:19:160
81500,0rcu_preempt3-21ksoftirqd/021:03:070
81500,0rcu_preempt3-21ksoftirqd/020:53:120
81500,0rcu_preempt3-21ksoftirqd/020:53:120
81500,0rcu_preempt3-21ksoftirqd/000:18:230
81500,0rcu_preempt28268-21kworker/0:023:33:040
81500,0rcu_preempt22730-21kworker/0:021:14:470
81500,0rcu_preempt0-21swapper/023:20:550
81490,0rcu_preempt3-21ksoftirqd/022:03:210
81490,0rcu_preempt3-21ksoftirqd/021:58:130
81490,0rcu_preempt3-21ksoftirqd/021:46:510
81490,0rcu_preempt3-21ksoftirqd/020:23:180
81490,0rcu_preempt22274-21kworker/0:219:53:130
81490,0rcu_preempt19-21ksoftirqd/122:39:081
81490,0rcu_preempt19-21ksoftirqd/122:32:311
81490,0rcu_preempt19-21ksoftirqd/120:18:141
81490,0rcu_preempt19-21ksoftirqd/120:08:181
81490,0rcu_preempt19-21ksoftirqd/100:19:381
10050490,0irq/346-484840032758-1kworker/0:1H21:50:160
9950480,0irq/345-484840022816-21apt-get19:28:050
81480,0rcu_preempt3-21ksoftirqd/022:34:060
81480,0rcu_preempt3-21ksoftirqd/000:32:400
81480,0rcu_preempt21179-21munin-node0
81480,0rcu_preempt19-21ksoftirqd/100:03:061
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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