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2026-05-03 - 13:25

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 Sun May 03, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811340,0rcu_preempt3-21ksoftirqd/019:03:330
10050770,0irq/346-484840025357-1kworker/0:1H22:18:110
10050750,0irq/346-484840054-21kswapd021:11:180
10050750,0irq/346-484840028729-1kworker/0:2H00:34:380
10050710,0irq/346-484840026748-1kworker/0:3H23:59:100
81690,0rcu_preempt851-21rngd22:20:031
10050690,0irq/346-484840028729-1kworker/0:2H00:30:120
10050680,0irq/346-48484007639-1kworker/0:2H00:11:020
10050680,0irq/346-484840019687-1kworker/0:3H23:18:410
81660,0rcu_preempt54-21kswapd022:26:190
10050660,0irq/346-48484005332-1kworker/0:1H22:29:090
81650,0rcu_preempt1470-21runrttasks20:28:501
81640,0rcu_preempt3-21ksoftirqd/023:48:240
81640,0rcu_preempt19-21ksoftirqd/120:53:241
81620,0rcu_preempt19-21ksoftirqd/122:48:241
81620,0rcu_preempt19-21ksoftirqd/122:28:241
81620,0rcu_preempt1757-21ssh21:18:231
81600,0rcu_preempt3-21ksoftirqd/023:29:560
81600,0rcu_preempt19-21ksoftirqd/121:23:191
81600,0rcu_preempt19-21ksoftirqd/120:33:361
81600,0rcu_preempt19-21ksoftirqd/100:10:101
81600,0rcu_preempt19-21ksoftirqd/100:07:511
81600,0rcu_preempt12362-21ssh21:28:371
81590,0rcu_preempt3-21ksoftirqd/023:12:330
81590,0rcu_preempt23267-21apt-get22:13:251
81590,0rcu_preempt19-21ksoftirqd/122:43:241
81590,0rcu_preempt19-21ksoftirqd/121:16:591
81590,0rcu_preempt19-21ksoftirqd/120:38:231
81590,0rcu_preempt19-21ksoftirqd/120:24:251
81590,0rcu_preempt19-21ksoftirqd/100:23:351
10050590,0irq/346-48484000-21swapper/022:39:410
81580,0rcu_preempt19-21ksoftirqd/120:43:401
81580,0rcu_preempt19-21ksoftirqd/120:09:551
81580,0rcu_preempt19-21ksoftirqd/119:59:341
81580,0rcu_preempt19-21ksoftirqd/119:13:371
81580,0rcu_preempt19-21ksoftirqd/100:33:401
81580,0rcu_preempt19-21ksoftirqd/100:18:241
10050580,0irq/346-484840054-21kswapd021:42:530
10050580,0irq/346-48484003649-21ssh21:53:231
81570,0rcu_preempt3-21ksoftirqd/023:16:160
81570,0rcu_preempt3-21ksoftirqd/022:10:310
81570,0rcu_preempt30275-21munin-node1
81570,0rcu_preempt19-21ksoftirqd/123:48:421
81570,0rcu_preempt19-21ksoftirqd/122:36:191
81570,0rcu_preempt19-21ksoftirqd/120:22:311
81570,0rcu_preempt19-21ksoftirqd/120:22:311
81570,0rcu_preempt19-21ksoftirqd/120:03:161
81560,0rcu_preempt3-21ksoftirqd/000:21:080
81560,0rcu_preempt19-21ksoftirqd/123:19:061
81560,0rcu_preempt19-21ksoftirqd/121:37:491
81560,0rcu_preempt19-21ksoftirqd/121:08:391
81560,0rcu_preempt19-21ksoftirqd/120:16:021
81550,0rcu_preempt19-21ksoftirqd/123:23:351
81550,0rcu_preempt19-21ksoftirqd/123:13:321
81550,0rcu_preempt19-21ksoftirqd/123:01:211
81550,0rcu_preempt19-21ksoftirqd/121:03:361
81550,0rcu_preempt19-21ksoftirqd/119:53:291
81550,0rcu_preempt19-21ksoftirqd/119:53:291
81550,0rcu_preempt19-21ksoftirqd/119:08:361
81550,0rcu_preempt19-21ksoftirqd/100:32:131
81550,0rcu_preempt15423-21ntp_kernel_pll_23:43:371
10050550,0irq/346-484840031497-21ssh23:27:330
10050550,0irq/346-484840028595-1kworker/0:2H21:56:550
81540,0rcu_preempt54-21kswapd000:13:361
81540,0rcu_preempt24451-21ps19:28:430
81540,0rcu_preempt19-21ksoftirqd/123:55:011
10050540,0irq/346-48484007639-1kworker/0:2H00:13:320
10050540,0irq/346-484840023456-1kworker/1:0H21:40:061
81530,0rcu_preempt19-21ksoftirqd/123:03:401
81530,0rcu_preempt19-21ksoftirqd/122:23:281
81530,0rcu_preempt19-21ksoftirqd/120:58:281
10050530,0irq/346-484840054-21kswapd022:58:121
9950520,0irq/345-48484000-21swapper/021:33:290
81520,0rcu_preempt3-21ksoftirqd/022:33:290
81520,0rcu_preempt3-21ksoftirqd/000:28:130
81520,0rcu_preempt19-21ksoftirqd/123:34:561
81520,0rcu_preempt19-21ksoftirqd/121:48:401
10050520,0irq/346-484840054-21kswapd023:33:360
81510,0rcu_preempt3-21ksoftirqd/022:48:140
81510,0rcu_preempt3-21ksoftirqd/020:28:130
81510,0rcu_preempt19-21ksoftirqd/123:38:401
81510,0rcu_preempt19-21ksoftirqd/123:28:361
10050510,0irq/346-4848400851-21rngd23:06:070
81500,0rcu_preempt6933-21kworker/0:121:58:390
81500,0rcu_preempt4726-21kworker/1:200:00:091
81500,0rcu_preempt31519-21php-cgi21:48:320
81500,0rcu_preempt19-21ksoftirqd/123:12:521
10050500,0irq/346-4848400851-21rngd22:55:180
10050500,0irq/346-4848400851-21rngd21:31:550
10050500,0irq/346-484840054-21kswapd023:38:390
10050500,0irq/346-484840017164-21runrttasks22:06:550
81490,0rcu_preempt3-21ksoftirqd/020:28:400
81490,0rcu_preempt19-21ksoftirqd/121:59:341
10050490,0irq/346-484840054-21kswapd000:05:180
10050490,0irq/346-48484000-21swapper/021:25:260
81480,0rcu_preempt3-21ksoftirqd/022:23:030
81480,0rcu_preempt3-21ksoftirqd/020:13:400
81480,0rcu_preempt3-21ksoftirqd/019:58:340
81480,0rcu_preempt3-21ksoftirqd/019:58:140
81480,0rcu_preempt3-21ksoftirqd/019:58:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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