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2026-09-05 - 09:23

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 Sat Sep 05, 2026 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81850,0rcu_preempt16633-21ssh21:14:081
81840,0rcu_preempt19-21ksoftirqd/123:01:361
81840,0rcu_preempt19-21ksoftirqd/120:21:051
81840,0rcu_preempt19-21ksoftirqd/120:13:431
81830,0rcu_preempt19-21ksoftirqd/100:28:591
81810,0rcu_preempt14195-21apt-get23:54:351
81800,0rcu_preempt19-21ksoftirqd/122:12:571
81800,0rcu_preempt19-21ksoftirqd/121:41:551
81800,0rcu_preempt19-21ksoftirqd/120:25:031
81800,0rcu_preempt19-21ksoftirqd/119:59:341
81800,0rcu_preempt0-21swapper/123:06:351
81790,0rcu_preempt19-21ksoftirqd/100:33:341
81780,0rcu_preempt19-21ksoftirqd/123:11:061
81780,0rcu_preempt19-21ksoftirqd/122:15:101
81780,0rcu_preempt19-21ksoftirqd/121:14:511
81780,0rcu_preempt19-21ksoftirqd/100:19:081
81770,0rcu_preempt19-21ksoftirqd/123:41:531
81770,0rcu_preempt19-21ksoftirqd/123:19:531
81770,0rcu_preempt19-21ksoftirqd/122:40:361
81770,0rcu_preempt19-21ksoftirqd/121:52:051
81770,0rcu_preempt19-21ksoftirqd/121:52:051
81770,0rcu_preempt19-21ksoftirqd/119:20:131
81760,0rcu_preempt19-21ksoftirqd/122:59:021
81760,0rcu_preempt19-21ksoftirqd/120:05:151
81760,0rcu_preempt19-21ksoftirqd/120:05:151
81760,0rcu_preempt19-21ksoftirqd/119:44:361
81760,0rcu_preempt19-21ksoftirqd/119:44:361
81760,0rcu_preempt19-21ksoftirqd/119:39:501
81760,0rcu_preempt1445-21runrttasks00:38:411
81750,0rcu_preempt19-21ksoftirqd/123:29:491
81740,0rcu_preempt3095-21kworker/1:020:44:511
81740,0rcu_preempt19-21ksoftirqd/123:27:491
81740,0rcu_preempt19-21ksoftirqd/122:34:131
81740,0rcu_preempt19-21ksoftirqd/121:48:131
81740,0rcu_preempt19-21ksoftirqd/121:38:541
81740,0rcu_preempt19-21ksoftirqd/119:35:141
81740,0rcu_preempt19-21ksoftirqd/119:24:461
81730,0rcu_preempt19-21ksoftirqd/123:59:361
81730,0rcu_preempt19-21ksoftirqd/123:16:361
81730,0rcu_preempt19-21ksoftirqd/122:50:041
81730,0rcu_preempt19-21ksoftirqd/121:24:121
81730,0rcu_preempt19-21ksoftirqd/120:59:511
81720,0rcu_preempt19-21ksoftirqd/122:22:431
81720,0rcu_preempt19-21ksoftirqd/122:01:001
81720,0rcu_preempt19-21ksoftirqd/121:56:551
81720,0rcu_preempt19-21ksoftirqd/120:16:321
81720,0rcu_preempt19-21ksoftirqd/100:24:081
81720,0rcu_preempt19-21ksoftirqd/100:13:021
81710,0rcu_preempt19-21ksoftirqd/123:45:021
81710,0rcu_preempt19-21ksoftirqd/121:29:021
81710,0rcu_preempt19-21ksoftirqd/119:54:391
81710,0rcu_preempt19-21ksoftirqd/100:06:541
81700,0rcu_preempt19-21ksoftirqd/123:52:341
81700,0rcu_preempt19-21ksoftirqd/121:29:391
81690,0rcu_preempt19-21ksoftirqd/122:37:121
81690,0rcu_preempt19-21ksoftirqd/122:25:271
81640,0rcu_preempt54-21kswapd019:34:251
81640,0rcu_preempt19-21ksoftirqd/122:44:491
10050630,0irq/346-484840026589-1kworker/0:0H21:56:210
10050620,0irq/346-484840029023-1kworker/1:3H23:38:251
10050590,0irq/346-484840027122-21ssh22:29:420
10050580,0irq/346-484840041ktimersoftd/023:03:360
10050560,0irq/346-48484004127-1kworker/1:3H22:09:181
10050550,0irq/346-484840029022-1kworker/0:0H23:50:310
10050550,0irq/346-48484000-21swapper/021:11:590
10050540,0irq/346-484840026533-1kworker/0:2H00:25:330
10050540,0irq/346-484840019418-1kworker/0:2H19:59:290
81530,0rcu_preempt3-21ksoftirqd/000:29:520
10050530,0irq/346-48484008271-1kworker/0:2H20:59:260
10050530,0irq/346-484840054-21kswapd023:49:200
10050530,0irq/346-484840054-21kswapd023:35:290
10050530,0irq/346-484840054-21kswapd022:10:060
10050530,0irq/346-484840017115-21apt21:14:350
10050520,0irq/346-484840054-21kswapd023:28:490
10050520,0irq/346-484840054-21kswapd023:05:140
10050520,0irq/346-48484004372-21apt-get22:39:350
10050520,0irq/346-484840029098-1kworker/0:1H21:27:090
10050520,0irq/346-484840011579-1kworker/0:0H22:48:590
10050520,0irq/346-48484000-21swapper/000:04:420
10050510,0irq/346-484840054-21kswapd023:41:400
10050510,0irq/346-484840054-21kswapd023:14:350
10050510,0irq/346-48484004115-1kworker/0:0H00:17:070
10050510,0irq/346-484840031559-1kworker/0:3H22:02:470
10050500,0irq/346-484840054-21kswapd023:12:590
10050500,0irq/346-484840054-21kswapd021:34:170
10050500,0irq/346-484840019093-1kworker/0:0H22:24:420
81490,0rcu_preempt19-21ksoftirqd/120:34:481
81490,0rcu_preempt19-21ksoftirqd/119:14:381
81490,0rcu_preempt19-21ksoftirqd/119:14:381
10050490,0irq/346-484840054-21kswapd022:22:540
10050490,0irq/346-484840054-21kswapd022:07:030
10050490,0irq/346-484840041ktimersoftd/021:21:030
10050490,0irq/346-484840031517-1kworker/0:1H00:13:130
10050490,0irq/346-484840026533-1kworker/0:2H00:22:500
10050480,0irq/346-484840054-21kswapd023:21:130
10050480,0irq/346-484840054-21kswapd000:03:280
10050480,0irq/346-484840013905-21ssh21:43:570
10050480,0irq/346-484840011750-21latency_hist22:14:260
10050480,0irq/346-48484000-21swapper/022:35:540
1599470,0migration/04092-21runrttasks19:04:470
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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