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2026-06-10 - 20:37

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 highest latencies:
System rackaslot5s.osadl.org (updated Wed Jun 10, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811280,0rcu_preempt3-21ksoftirqd/009:30:530
811260,0rcu_preempt3-21ksoftirqd/010:01:070
811260,0rcu_preempt3-21ksoftirqd/010:01:070
81940,0rcu_preempt3-21ksoftirqd/010:29:580
81920,0rcu_preempt3-21ksoftirqd/011:29:250
81840,0rcu_preempt3-21ksoftirqd/011:38:550
81840,0rcu_preempt3-21ksoftirqd/011:38:550
81840,0rcu_preempt3-21ksoftirqd/011:04:100
81840,0rcu_preempt3-21ksoftirqd/010:58:590
81840,0rcu_preempt3-21ksoftirqd/010:17:550
81830,0rcu_preempt32647-21kworker/0:110:44:470
81830,0rcu_preempt3-21ksoftirqd/009:21:010
81830,0rcu_preempt10996-21kworker/0:212:24:160
81820,0rcu_preempt7417-21kworker/0:207:58:250
81820,0rcu_preempt3-21ksoftirqd/011:37:320
81810,0rcu_preempt3-21ksoftirqd/011:51:340
81810,0rcu_preempt3-21ksoftirqd/010:17:300
81810,0rcu_preempt3-21ksoftirqd/010:10:540
81810,0rcu_preempt3-21ksoftirqd/007:52:100
81810,0rcu_preempt10996-21kworker/0:212:17:130
81800,0rcu_preempt4754-21kworker/0:109:49:180
81800,0rcu_preempt3-21ksoftirqd/011:23:290
81800,0rcu_preempt3-21ksoftirqd/011:14:420
81800,0rcu_preempt3-21ksoftirqd/010:41:160
81800,0rcu_preempt3-21ksoftirqd/010:41:160
81800,0rcu_preempt3-21ksoftirqd/009:54:330
81800,0rcu_preempt3-21ksoftirqd/009:39:490
81800,0rcu_preempt3-21ksoftirqd/008:50:480
81800,0rcu_preempt3-21ksoftirqd/008:38:080
81800,0rcu_preempt16952-21kworker/0:008:07:160
81790,0rcu_preempt8363-21kworker/0:112:33:360
81790,0rcu_preempt54-21kswapd009:22:450
81790,0rcu_preempt4584-21diskmemload09:35:330
81790,0rcu_preempt3-21ksoftirqd/012:17:490
81790,0rcu_preempt3-21ksoftirqd/012:17:490
81790,0rcu_preempt3-21ksoftirqd/011:46:470
81790,0rcu_preempt3-21ksoftirqd/010:52:490
81790,0rcu_preempt3-21ksoftirqd/010:50:120
81790,0rcu_preempt3-21ksoftirqd/010:37:250
81790,0rcu_preempt3-21ksoftirqd/008:24:420
81790,0rcu_preempt30602-21kworker/0:012:06:180
81780,0rcu_preempt3-21ksoftirqd/011:59:430
81780,0rcu_preempt3-21ksoftirqd/010:25:100
81780,0rcu_preempt3-21ksoftirqd/010:04:340
81780,0rcu_preempt3-21ksoftirqd/009:46:200
81770,0rcu_preempt3-21ksoftirqd/012:29:490
81770,0rcu_preempt3-21ksoftirqd/011:11:020
81770,0rcu_preempt3-21ksoftirqd/011:11:020
81770,0rcu_preempt30602-21kworker/0:011:56:560
81760,0rcu_preempt3-21ksoftirqd/009:13:290
81760,0rcu_preempt16952-21kworker/0:008:11:030
81750,0rcu_preempt3-21ksoftirqd/012:10:580
81750,0rcu_preempt3-21ksoftirqd/011:19:530
81750,0rcu_preempt3-21ksoftirqd/011:19:530
81750,0rcu_preempt3-21ksoftirqd/009:08:060
81750,0rcu_preempt3-21ksoftirqd/008:34:130
81750,0rcu_preempt3-21ksoftirqd/007:12:110
81730,0rcu_preempt851-21rngd07:52:580
81730,0rcu_preempt851-21rngd07:52:580
81720,0rcu_preempt19288-21kworker/0:108:18:540
81710,0rcu_preempt3-21ksoftirqd/009:02:530
81680,0rcu_preempt3-21ksoftirqd/008:17:350
10050680,0irq/346-4848400181ktimersoftd/110:37:471
10050680,0irq/346-4848400181ktimersoftd/110:37:471
81670,0rcu_preempt3-21ksoftirqd/008:42:570
81670,0rcu_preempt3-21ksoftirqd/007:46:090
81640,0rcu_preempt3-21ksoftirqd/009:01:090
81630,0rcu_preempt3-21ksoftirqd/007:30:090
10050610,0irq/346-484840026699-21ssh09:29:041
10050610,0irq/346-484840025340-21ssh10:33:031
10050610,0irq/346-484840012173-1kworker/1:1H09:17:231
9950600,0irq/345-484840031883-1kworker/1:2H10:42:471
9950600,0irq/345-4848400181ktimersoftd/110:23:221
10050600,0irq/346-48484003768-21ssh11:48:561
10050600,0irq/346-484840026966-1kworker/1:1H11:44:211
10050600,0irq/346-484840026692-21ssh12:12:451
9950590,0irq/345-4848400181ktimersoftd/109:18:321
10050590,0irq/346-48484008192-21ssh11:53:141
10050590,0irq/346-48484007565-21ssh10:15:291
10050590,0irq/346-4848400181ktimersoftd/110:29:141
9950570,0irq/345-4848400181ktimersoftd/112:04:321
81570,0rcu_preempt1018-21rpcbind10:57:471
81560,0rcu_preempt3-21ksoftirqd/007:37:480
10050560,0irq/346-484840010594-21ssh09:45:561
9950550,0irq/345-484840011890-1kworker/1:0H12:31:471
81550,0rcu_preempt19-21ksoftirqd/107:59:181
9950540,0irq/345-4848400181ktimersoftd/112:33:421
81540,0rcu_preempt3-21ksoftirqd/007:02:490
10050540,0irq/346-484840023780-21ssh12:09:081
10050530,0irq/346-484840024492-1kworker/1:3H10:04:301
9950510,0irq/345-484840021972-1kworker/1:2H11:36:351
10050510,0irq/346-484840019440-1kworker/1:3H12:17:491
10050510,0irq/346-484840019440-1kworker/1:3H12:17:491
9950500,0irq/345-484840024492-1kworker/1:3H10:02:051
9950500,0irq/345-484840024492-1kworker/1:3H10:02:051
9950500,0irq/345-48484002005-1kworker/1:4H11:18:071
9950500,0irq/345-48484002005-1kworker/1:4H11:18:071
9950490,0irq/345-48484009989-21munin-node1
9950490,0irq/345-48484009566-1kworker/1:0H09:50:001
9950490,0irq/345-484840054-21kswapd010:53:211
9950490,0irq/345-484840029423-1kworker/1:2H11:14:241
9950490,0irq/345-484840014470-1kworker/1:1H11:03:101
81490,0rcu_preempt3-21ksoftirqd/008:52:540
9950480,0irq/345-48484007176-1kworker/1:0H09:11:001
9950480,0irq/345-48484006919-1kworker/1:2H12:25:171
9950470,0irq/345-48484009474-1kworker/1:2H10:51:471
9950470,0irq/345-484840022106-1kworker/1:1H09:34:011
81470,0rcu_preempt3-21ksoftirqd/007:33:100
9950460,0irq/345-48484000-21swapper/110:12:151
10050460,0irq/346-4848400851-21rngd10:19:401
10050460,0irq/346-48484000-21swapper/109:54:011
10050460,0irq/346-48484000-21swapper/107:32:571
9950450,0irq/345-48484000-21swapper/107:27:561
10050450,0irq/346-48484000-21swapper/109:42:271
81440,0rcu_preempt19-21ksoftirqd/108:03:031
10050440,0irq/346-484840054-21kswapd009:25:461
10050430,0irq/346-4848400852-21ping07:37:531
10050430,0irq/346-4848400841-21munin-run07:17:360
81410,0rcu_preempt4584-21diskmemload11:32:101
3000899419,0cyclictest2206-1kworker/0:1H07:19:120
81400,0rcu_preempt19-21ksoftirqd/111:39:111
81400,0rcu_preempt19-21ksoftirqd/111:39:111
81400,0rcu_preempt19-21ksoftirqd/107:44:111
81400,0rcu_preempt19-21ksoftirqd/107:14:261
81400,0rcu_preempt0-21swapper/008:28:010
10050400,0irq/346-484840012191-21munin-node1
81390,0rcu_preempt19-21ksoftirqd/108:53:201
81390,0rcu_preempt19-21ksoftirqd/108:27:351
81390,0rcu_preempt19-21ksoftirqd/107:26:021
81390,0rcu_preempt19-21ksoftirqd/107:17:551
10050390,0irq/346-48484000-21swapper/108:29:231
81380,0rcu_preempt19-21ksoftirqd/108:49:401
81380,0rcu_preempt19-21ksoftirqd/108:43:581
81380,0rcu_preempt19-21ksoftirqd/108:38:441
81380,0rcu_preempt19-21ksoftirqd/107:53:161
81380,0rcu_preempt19-21ksoftirqd/107:53:161
13250380,0irq/301-48020000-21swapper/107:02:521
10050380,0irq/346-484840029150-21ssh11:09:271
10050380,0irq/346-484840029150-21ssh11:09:271
9950370,0irq/345-48484000-21swapper/007:23:460
81370,0rcu_preempt19-21ksoftirqd/109:03:091
81370,0rcu_preempt19-21ksoftirqd/108:35:141
81370,0rcu_preempt19-21ksoftirqd/108:19:121
81370,0rcu_preempt19-21ksoftirqd/107:08:511
81360,0rcu_preempt19-21ksoftirqd/108:08:091
81350,0rcu_preempt852-21ping07:48:081
81350,0rcu_preempt19-21ksoftirqd/108:58:481
10050300,0irq/346-484840015242-21ping08:14:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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