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2025-08-29 - 12:02

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 Aug 29, 2025 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81940,0rcu_preempt3-21ksoftirqd/022:41:570
81840,0rcu_preempt3-21ksoftirqd/022:08:080
81840,0rcu_preempt12363-21kworker/0:123:30:350
81830,0rcu_preempt3-21ksoftirqd/021:33:530
81830,0rcu_preempt3-21ksoftirqd/021:16:280
81820,0rcu_preempt54-21kswapd022:40:380
81820,0rcu_preempt3-21ksoftirqd/022:25:570
81820,0rcu_preempt3-21ksoftirqd/020:04:500
81820,0rcu_preempt3-21ksoftirqd/020:04:500
81820,0rcu_preempt3-21ksoftirqd/000:01:110
81810,0rcu_preempt3-21ksoftirqd/020:52:530
81810,0rcu_preempt3-21ksoftirqd/020:21:470
81810,0rcu_preempt3-21ksoftirqd/020:00:170
81810,0rcu_preempt27526-21kworker/0:121:21:540
81800,0rcu_preempt3-21ksoftirqd/023:52:250
81800,0rcu_preempt3-21ksoftirqd/023:40:390
81800,0rcu_preempt3-21ksoftirqd/021:41:280
81800,0rcu_preempt21161-21kworker/0:221:08:290
81800,0rcu_preempt19-21ksoftirqd/122:35:591
81790,0rcu_preempt24882-21kworker/0:219:13:390
81790,0rcu_preempt12363-21kworker/0:123:33:560
81780,0rcu_preempt3-21ksoftirqd/020:17:160
81780,0rcu_preempt3-21ksoftirqd/019:51:270
81780,0rcu_preempt3-21ksoftirqd/019:51:270
81780,0rcu_preempt24840-21kworker/0:200:25:580
81770,0rcu_preempt6744-21kworker/0:023:24:340
81770,0rcu_preempt3-21ksoftirqd/000:28:070
81760,0rcu_preempt3-21ksoftirqd/022:20:110
81760,0rcu_preempt3-21ksoftirqd/020:57:010
81760,0rcu_preempt3-21ksoftirqd/020:32:020
81760,0rcu_preempt3-21ksoftirqd/020:26:500
81760,0rcu_preempt3-21ksoftirqd/000:15:320
81750,0rcu_preempt3-21ksoftirqd/023:56:350
81750,0rcu_preempt3-21ksoftirqd/023:19:090
81750,0rcu_preempt3-21ksoftirqd/023:09:500
81750,0rcu_preempt3-21ksoftirqd/022:46:350
81750,0rcu_preempt3-21ksoftirqd/021:56:230
81750,0rcu_preempt3-21ksoftirqd/021:28:200
81750,0rcu_preempt3-21ksoftirqd/020:47:030
81750,0rcu_preempt3-21ksoftirqd/020:12:240
81750,0rcu_preempt3-21ksoftirqd/000:17:460
81750,0rcu_preempt3-21ksoftirqd/000:17:460
81750,0rcu_preempt29303-21apt-get23:11:110
81740,0rcu_preempt3-21ksoftirqd/022:29:400
81740,0rcu_preempt3-21ksoftirqd/021:47:290
81740,0rcu_preempt3-21ksoftirqd/021:03:210
81740,0rcu_preempt3-21ksoftirqd/020:37:120
81740,0rcu_preempt3-21ksoftirqd/019:09:320
81740,0rcu_preempt3-21ksoftirqd/000:33:420
81740,0rcu_preempt3-21ksoftirqd/000:07:310
81730,0rcu_preempt3-21ksoftirqd/023:01:040
81730,0rcu_preempt3-21ksoftirqd/023:00:460
81730,0rcu_preempt3-21ksoftirqd/023:00:460
81730,0rcu_preempt3-21ksoftirqd/022:12:260
81730,0rcu_preempt3-21ksoftirqd/020:06:420
81730,0rcu_preempt29371-21ssh23:48:360
81720,0rcu_preempt3-21ksoftirqd/022:50:590
81720,0rcu_preempt3-21ksoftirqd/022:03:490
81720,0rcu_preempt3-21ksoftirqd/021:52:450
81720,0rcu_preempt3-21ksoftirqd/021:36:400
81720,0rcu_preempt3-21ksoftirqd/020:44:270
81720,0rcu_preempt3-21ksoftirqd/019:48:400
81720,0rcu_preempt3-21ksoftirqd/019:20:580
81710,0rcu_preempt3-21ksoftirqd/023:41:300
81700,0rcu_preempt3-21ksoftirqd/022:35:090
81700,0rcu_preempt3-21ksoftirqd/021:13:050
81700,0rcu_preempt3-21ksoftirqd/019:29:200
81680,0rcu_preempt3-21ksoftirqd/019:35:210
81670,0rcu_preempt3-21ksoftirqd/019:45:460
81660,0rcu_preempt3-21ksoftirqd/019:38:380
81660,0rcu_preempt3-21ksoftirqd/019:21:100
9950610,0irq/345-48484001688-21kworker/1:321:13:151
10050570,0irq/346-484840012631-1kworker/1:0H00:20:151
10050570,0irq/346-484840012631-1kworker/1:0H00:20:151
9950530,0irq/345-48484004962-1kworker/1:1H00:04:311
10050530,0irq/346-484840054-21kswapd021:09:431
9950510,0irq/345-484840020629-21diskmemload23:43:101
10050510,0irq/346-484840054-21kswapd022:29:131
10050510,0irq/346-484840019717-1kworker/1:1H22:22:171
9950500,0irq/345-4848400847-1kworker/1:0H23:16:141
9950500,0irq/345-48484002173-21192.168.115.60-20:07:201
10050500,0irq/346-484840019-21ksoftirqd/122:18:321
10050500,0irq/346-484840018773-21ssh22:58:051
10050500,0irq/346-484840018773-21ssh22:58:051
10050490,0irq/346-484840023817-1kworker/1:3H00:25:011
9950480,0irq/345-4848400753-21rngd22:54:231
10050480,0irq/346-484840054-21kswapd023:11:251
9950470,0irq/345-484840024353-1kworker/1:3H21:52:311
10050460,0irq/346-484840054-21kswapd023:05:211
9950450,0irq/345-48484000-21swapper/123:31:061
9950450,0irq/345-48484000-21swapper/122:01:101
81450,0rcu_preempt0-21swapper/122:06:081
10050450,0irq/346-48484009975-1kworker/0:0H19:01:240
10050450,0irq/346-4848400966-21lighttpd00:34:091
10050450,0irq/346-484840054-21kswapd023:46:261
10050450,0irq/346-484840030624-1kworker/1:1H21:57:131
10050440,0irq/346-484840016864-21ping19:21:151
10050440,0irq/346-484840015154-1kworker/1:1H21:42:351
10050440,0irq/346-48484000-21swapper/123:23:541
81420,0rcu_preempt19-21ksoftirqd/122:41:291
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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