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2026-09-04 - 14:32

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 Sep 04, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10050840,0irq/346-484840018639-1kworker/0:2H21:58:480
10050810,0irq/346-4848400111rcuc/022:17:280
81800,0rcu_preempt3-21ksoftirqd/021:35:460
10050800,0irq/346-4848400111rcuc/021:33:400
10050780,0irq/346-4848400111rcuc/000:09:070
81730,0rcu_preempt3-21ksoftirqd/022:00:530
81730,0rcu_preempt3-21ksoftirqd/000:22:070
81720,0rcu_preempt3-21ksoftirqd/022:44:000
10050720,0irq/346-48484000-21swapper/000:13:500
81710,0rcu_preempt3-21ksoftirqd/023:44:150
81710,0rcu_preempt3-21ksoftirqd/000:35:260
10050710,0irq/346-484840054-21kswapd022:32:080
10050710,0irq/346-48484000-21swapper/022:52:380
81700,0rcu_preempt19-21ksoftirqd/121:34:151
81700,0rcu_preempt10965-1kworker/0:0H21:18:380
81690,0rcu_preempt3-21ksoftirqd/023:53:140
81690,0rcu_preempt3-21ksoftirqd/022:57:460
81690,0rcu_preempt3-21ksoftirqd/022:39:070
81690,0rcu_preempt3-21ksoftirqd/000:28:580
81690,0rcu_preempt3-21ksoftirqd/000:01:590
81680,0rcu_preempt19-21ksoftirqd/123:30:501
81670,0rcu_preempt3-21ksoftirqd/023:32:350
81670,0rcu_preempt3-21ksoftirqd/022:45:360
81660,0rcu_preempt3-21ksoftirqd/023:11:480
81660,0rcu_preempt3-21ksoftirqd/021:40:130
81660,0rcu_preempt14554-21kworker/1:100:14:401
81660,0rcu_preempt0-21swapper/100:00:241
81650,0rcu_preempt19-21ksoftirqd/122:41:541
81650,0rcu_preempt19-21ksoftirqd/121:46:221
81650,0rcu_preempt19-21ksoftirqd/100:22:121
81640,0rcu_preempt19-21ksoftirqd/121:28:131
81630,0rcu_preempt19-21ksoftirqd/123:21:021
81630,0rcu_preempt19-21ksoftirqd/121:09:401
81630,0rcu_preempt19-21ksoftirqd/100:12:181
81620,0rcu_preempt19-21ksoftirqd/121:42:171
81610,0rcu_preempt54-21kswapd000:08:061
81610,0rcu_preempt19-21ksoftirqd/123:39:411
81610,0rcu_preempt19-21ksoftirqd/121:19:131
81610,0rcu_preempt19-21ksoftirqd/119:21:491
81610,0rcu_preempt19-21ksoftirqd/100:26:011
10050610,0irq/346-48484001235-1kworker/0:3H21:51:400
81600,0rcu_preempt19-21ksoftirqd/122:25:511
81600,0rcu_preempt19-21ksoftirqd/100:30:221
10050600,0irq/346-484840011818-1kworker/1:0H23:29:071
81590,0rcu_preempt19-21ksoftirqd/122:37:451
81590,0rcu_preempt19-21ksoftirqd/121:58:201
10050590,0irq/346-484840054-21kswapd023:51:471
81580,0rcu_preempt3-21ksoftirqd/022:09:310
81580,0rcu_preempt31425-21ntp_states19:14:500
10050580,0irq/346-484840030973-1kworker/1:2H21:36:551
81570,0rcu_preempt19-21ksoftirqd/123:35:091
81560,0rcu_preempt3-21ksoftirqd/022:04:410
10050560,0irq/346-484840029200-1kworker/1:3H23:12:351
81540,0rcu_preempt3-21ksoftirqd/021:20:010
81540,0rcu_preempt19-21ksoftirqd/121:23:001
81540,0rcu_preempt12751-21ping20:24:550
10050540,0irq/346-48484009086-1kworker/1:3H22:54:341
10050540,0irq/346-484840054-21kswapd022:19:481
10050540,0irq/346-484840023776-1kworker/0:3H00:18:510
81530,0rcu_preempt9396-21kworker/0:123:24:470
81530,0rcu_preempt3-21ksoftirqd/023:19:480
81530,0rcu_preempt3-21ksoftirqd/022:19:530
81530,0rcu_preempt19-21ksoftirqd/122:49:321
10050530,0irq/346-4848400836-21rngd21:47:440
10050530,0irq/346-484840028712-1kworker/1:0H22:07:141
10050530,0irq/346-4848400181ktimersoftd/123:17:051
81520,0rcu_preempt3-21ksoftirqd/020:59:380
81520,0rcu_preempt3-21ksoftirqd/020:59:380
81520,0rcu_preempt23247-21kworker/0:121:29:130
81520,0rcu_preempt19-21ksoftirqd/120:01:321
81520,0rcu_preempt0-21swapper/122:33:291
10050520,0irq/346-484840031883-1kworker/1:0H23:48:281
10050520,0irq/346-484840021839-1kworker/0:0H23:36:530
10050520,0irq/346-484840016378-1kworker/0:1H22:28:200
81510,0rcu_preempt17703-21kworker/0:120:12:440
10050510,0irq/346-484840024474-21ssh23:06:481
10050510,0irq/346-484840010841-1kworker/0:1H00:30:100
81500,0rcu_preempt8796-21ssh23:55:370
81500,0rcu_preempt3-21ksoftirqd/023:44:540
81500,0rcu_preempt3-21ksoftirqd/020:49:380
81500,0rcu_preempt3-21ksoftirqd/020:39:270
81500,0rcu_preempt3-21ksoftirqd/020:24:070
81500,0rcu_preempt17703-21kworker/0:120:16:380
10050500,0irq/346-484840054-21kswapd021:49:321
10050500,0irq/346-484840020352-21ssh23:02:571
10050500,0irq/346-48484000-21swapper/122:01:111
10050500,0irq/346-48484000-21swapper/021:13:120
81490,0rcu_preempt3-21ksoftirqd/022:59:550
81490,0rcu_preempt3-21ksoftirqd/020:05:380
81490,0rcu_preempt3-21ksoftirqd/019:59:290
81490,0rcu_preempt19-21ksoftirqd/120:04:551
10050490,0irq/346-484840054-21kswapd022:44:561
81480,0rcu_preempt3-21ksoftirqd/023:17:130
81480,0rcu_preempt3-21ksoftirqd/019:49:550
81480,0rcu_preempt19-21ksoftirqd/123:58:551
81480,0rcu_preempt19-21ksoftirqd/120:19:471
10050480,0irq/346-484840054-21kswapd000:35:411
81470,0rcu_preempt3-21ksoftirqd/023:04:270
81470,0rcu_preempt26264-21kworker/0:121:07:450
81470,0rcu_preempt19-21ksoftirqd/119:31:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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