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2026-07-03 - 07:52

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 Jul 03, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81930,0rcu_preempt19-21ksoftirqd/100:19:041
81870,0rcu_preempt19-21ksoftirqd/122:36:501
81860,0rcu_preempt54-21kswapd021:52:261
81860,0rcu_preempt19-21ksoftirqd/123:22:541
81850,0rcu_preempt19-21ksoftirqd/119:42:321
81840,0rcu_preempt19-21ksoftirqd/122:15:231
81840,0rcu_preempt19-21ksoftirqd/119:58:051
81830,0rcu_preempt54-21kswapd021:58:381
81830,0rcu_preempt23045-21cyclictest00:05:201
81830,0rcu_preempt23045-21cyclictest00:05:201
81830,0rcu_preempt21868-21ssh23:10:201
81830,0rcu_preempt19-21ksoftirqd/123:58:561
81830,0rcu_preempt19-21ksoftirqd/121:33:231
81830,0rcu_preempt19-21ksoftirqd/121:25:091
81830,0rcu_preempt19-21ksoftirqd/120:03:071
81830,0rcu_preempt19-21ksoftirqd/119:36:101
81830,0rcu_preempt19-21ksoftirqd/119:29:381
81830,0rcu_preempt19-21ksoftirqd/119:17:491
81830,0rcu_preempt19-21ksoftirqd/100:27:471
81820,0rcu_preempt28332-21kworker/1:023:21:351
81820,0rcu_preempt19-21ksoftirqd/123:52:481
81820,0rcu_preempt19-21ksoftirqd/120:08:481
81810,0rcu_preempt54-21kswapd021:12:551
81810,0rcu_preempt19-21ksoftirqd/122:18:171
81810,0rcu_preempt19-21ksoftirqd/121:48:021
81810,0rcu_preempt19-21ksoftirqd/121:42:411
81810,0rcu_preempt19-21ksoftirqd/100:13:191
81800,0rcu_preempt19-21ksoftirqd/122:43:591
81800,0rcu_preempt19-21ksoftirqd/122:07:341
81800,0rcu_preempt19-21ksoftirqd/121:39:041
81800,0rcu_preempt19-21ksoftirqd/120:16:211
81790,0rcu_preempt5854-21ssh00:32:381
81790,0rcu_preempt54-21kswapd000:25:041
81790,0rcu_preempt19-21ksoftirqd/122:38:361
81790,0rcu_preempt19-21ksoftirqd/120:36:051
81780,0rcu_preempt19-21ksoftirqd/123:32:121
81780,0rcu_preempt19-21ksoftirqd/123:04:511
81780,0rcu_preempt19-21ksoftirqd/122:52:261
81780,0rcu_preempt19-21ksoftirqd/122:28:581
81780,0rcu_preempt19-21ksoftirqd/120:52:341
81780,0rcu_preempt19-21ksoftirqd/119:22:341
81770,0rcu_preempt19-21ksoftirqd/123:34:571
81770,0rcu_preempt19-21ksoftirqd/123:34:571
81770,0rcu_preempt19-21ksoftirqd/122:47:251
81770,0rcu_preempt19-21ksoftirqd/122:47:251
81770,0rcu_preempt19-21ksoftirqd/122:02:351
81770,0rcu_preempt19-21ksoftirqd/119:37:391
81770,0rcu_preempt19-21ksoftirqd/119:12:241
81770,0rcu_preempt19-21ksoftirqd/100:08:271
81760,0rcu_preempt19-21ksoftirqd/121:10:421
81750,0rcu_preempt19-21ksoftirqd/123:50:381
81750,0rcu_preempt19-21ksoftirqd/122:59:281
81750,0rcu_preempt19-21ksoftirqd/122:59:281
81740,0rcu_preempt8044-21kworker/1:121:18:531
81740,0rcu_preempt19-21ksoftirqd/123:12:181
81740,0rcu_preempt19-21ksoftirqd/120:22:251
81720,0rcu_preempt19-21ksoftirqd/122:26:571
81710,0rcu_preempt19-21ksoftirqd/123:40:201
81710,0rcu_preempt19-21ksoftirqd/120:17:381
81700,0rcu_preempt19-21ksoftirqd/123:43:411
81700,0rcu_preempt19-21ksoftirqd/121:30:441
81690,0rcu_preempt19-21ksoftirqd/120:37:281
81680,0rcu_preempt3-21ksoftirqd/023:39:370
81680,0rcu_preempt19-21ksoftirqd/119:54:251
81610,0rcu_preempt3-21ksoftirqd/023:26:290
81600,0rcu_preempt3-21ksoftirqd/022:08:060
81580,0rcu_preempt19-21ksoftirqd/120:42:301
10050580,0irq/346-4848400851-21rngd21:17:440
10050580,0irq/346-48484000-21swapper/020:49:560
10050570,0irq/346-48484007155-1kworker/0:2H00:35:210
81560,0rcu_preempt19-21ksoftirqd/119:07:411
10050560,0irq/346-48484009370-1kworker/0:0H22:27:290
10050560,0irq/346-484840054-21kswapd023:44:420
10050550,0irq/346-484840054-21kswapd023:16:330
10050550,0irq/346-484840023621-1kworker/0:0H21:33:090
81540,0rcu_preempt3-21ksoftirqd/021:38:150
10050540,0irq/346-4848400851-21rngd22:51:340
10050540,0irq/346-4848400851-21rngd22:51:340
10050540,0irq/346-4848400851-21rngd22:32:400
81530,0rcu_preempt26458-1kworker/1:3H20:57:301
10050530,0irq/346-4848400851-21rngd23:56:370
10050530,0irq/346-4848400851-21rngd21:47:050
10050530,0irq/346-484840054-21kswapd023:50:460
10050530,0irq/346-484840054-21kswapd021:31:180
81520,0rcu_preempt3-21ksoftirqd/019:02:330
10050520,0irq/346-484840054-21kswapd022:13:280
10050520,0irq/346-484840031193-1kworker/0:1H23:19:430
10050510,0irq/346-48484007312-1kworker/0:1H21:52:320
10050510,0irq/346-484840054-21kswapd021:24:320
10050510,0irq/346-484840054-21kswapd000:19:140
10050510,0irq/346-484840026256-1kworker/0:0H23:28:130
10050500,0irq/346-484840054-21kswapd023:33:330
10050500,0irq/346-484840054-21kswapd023:33:330
10050500,0irq/346-484840054-21kswapd021:09:260
10050500,0irq/346-48484000-21swapper/000:13:540
81490,0rcu_preempt19-21ksoftirqd/119:02:381
10050490,0irq/346-484840054-21kswapd023:09:450
10050490,0irq/346-484840054-21kswapd021:57:530
10050490,0irq/346-484840054-21kswapd000:22:450
10050490,0irq/346-48484000-21swapper/022:40:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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