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2026-06-18 - 10:10

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 Thu Jun 18, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811000,0rcu_preempt19-21ksoftirqd/121:49:501
81990,0rcu_preempt0-21swapper/122:01:331
81990,0rcu_preempt0-21swapper/122:01:331
81980,0rcu_preempt13567-21ssh21:34:261
81960,0rcu_preempt0-21swapper/123:59:261
81950,0rcu_preempt54-21kswapd000:08:421
81930,0rcu_preempt0-21swapper/100:16:291
81910,0rcu_preempt0-21swapper/100:36:521
81900,0rcu_preempt19-21ksoftirqd/122:04:531
81880,0rcu_preempt54-21kswapd023:24:011
81880,0rcu_preempt54-21kswapd023:00:521
81880,0rcu_preempt19-21ksoftirqd/121:31:141
81870,0rcu_preempt54-21kswapd000:06:291
81860,0rcu_preempt19-21ksoftirqd/123:19:211
81830,0rcu_preempt19-21ksoftirqd/120:16:391
81820,0rcu_preempt19-21ksoftirqd/123:03:291
81820,0rcu_preempt19-21ksoftirqd/122:47:401
81820,0rcu_preempt19-21ksoftirqd/121:40:151
81810,0rcu_preempt19-21ksoftirqd/100:21:531
81800,0rcu_preempt19-21ksoftirqd/123:45:051
81800,0rcu_preempt19-21ksoftirqd/122:25:281
81790,0rcu_preempt19-21ksoftirqd/122:30:131
81760,0rcu_preempt19-21ksoftirqd/123:47:311
81760,0rcu_preempt19-21ksoftirqd/122:42:101
81740,0rcu_preempt17542-21ssh22:43:431
81740,0rcu_preempt17542-21ssh22:43:431
81730,0rcu_preempt3-21ksoftirqd/023:28:140
10050730,0irq/346-484840041ktimersoftd/022:22:410
81720,0rcu_preempt3-21ksoftirqd/021:22:490
81710,0rcu_preempt19-21ksoftirqd/121:56:011
81700,0rcu_preempt3-21ksoftirqd/022:21:440
81700,0rcu_preempt19-21ksoftirqd/122:36:001
81700,0rcu_preempt0-21swapper/123:14:321
81680,0rcu_preempt19-21ksoftirqd/100:28:251
10050680,0irq/346-48484005514-21cron22:32:280
81670,0rcu_preempt54-21kswapd022:09:530
81670,0rcu_preempt54-21kswapd021:30:210
81670,0rcu_preempt19-21ksoftirqd/120:00:031
10050670,0irq/346-4848400171rcuc/121:17:531
10050660,0irq/346-4848400181ktimersoftd/121:08:091
81650,0rcu_preempt54-21kswapd021:41:130
81650,0rcu_preempt19-21ksoftirqd/123:56:081
81650,0rcu_preempt19-21ksoftirqd/122:11:531
10050650,0irq/346-484840054-21kswapd022:17:531
10050650,0irq/346-484840019-21ksoftirqd/122:57:031
10050650,0irq/346-484840019-21ksoftirqd/122:57:031
10050650,0irq/346-4848400181ktimersoftd/122:16:181
10050650,0irq/346-4848400171rcuc/121:15:151
10050650,0irq/346-4848400171rcuc/121:15:151
81640,0rcu_preempt3-21ksoftirqd/023:24:270
81640,0rcu_preempt19-21ksoftirqd/119:21:341
81630,0rcu_preempt0-21swapper/021:35:570
81620,0rcu_preempt19-21ksoftirqd/123:35:471
10050610,0irq/346-4848400171rcuc/121:27:281
10050610,0irq/346-484840015085-1kworker/0:2H00:21:020
81600,0rcu_preempt3-21ksoftirqd/023:52:490
81600,0rcu_preempt3-21ksoftirqd/022:32:430
81600,0rcu_preempt19-21ksoftirqd/123:09:561
81590,0rcu_preempt3-21ksoftirqd/021:07:590
10050590,0irq/346-48484000-21swapper/021:22:160
81580,0rcu_preempt3-21ksoftirqd/020:52:380
81580,0rcu_preempt19-21ksoftirqd/121:46:201
81580,0rcu_preempt19-21ksoftirqd/120:03:131
81570,0rcu_preempt9602-21kworker/0:019:07:390
81570,0rcu_preempt3-21ksoftirqd/019:17:470
81570,0rcu_preempt19-21ksoftirqd/120:17:471
10050570,0irq/346-48484007812-1kworker/0:2H23:41:560
10050570,0irq/346-484840027166-1kworker/0:1H00:33:400
9950560,0irq/345-484840015423-21sh23:14:280
81560,0rcu_preempt19-21ksoftirqd/119:47:531
81560,0rcu_preempt19-21ksoftirqd/119:02:501
10050560,0irq/346-4848400181ktimersoftd/100:23:261
10050560,0irq/346-484840010816-1kworker/0:1H22:37:460
81550,0rcu_preempt3-21ksoftirqd/020:17:410
81550,0rcu_preempt3-21ksoftirqd/000:12:480
81550,0rcu_preempt19-21ksoftirqd/119:07:491
10050550,0irq/346-484840022447-21ssh22:16:390
10050550,0irq/346-4848400171rcuc/123:40:551
9950540,0irq/345-48484000-21swapper/000:01:220
81540,0rcu_preempt19-21ksoftirqd/120:42:471
81540,0rcu_preempt19-21ksoftirqd/120:27:371
81540,0rcu_preempt19-21ksoftirqd/120:12:241
81540,0rcu_preempt19-21ksoftirqd/120:12:241
81540,0rcu_preempt19-21ksoftirqd/119:44:541
81530,0rcu_preempt19-21ksoftirqd/120:32:521
81530,0rcu_preempt19-21ksoftirqd/120:32:521
81530,0rcu_preempt19-21ksoftirqd/119:52:481
81520,0rcu_preempt4186-21kworker/0:021:42:420
81520,0rcu_preempt19-21ksoftirqd/123:27:561
81520,0rcu_preempt19-21ksoftirqd/120:37:491
81520,0rcu_preempt19-21ksoftirqd/120:22:561
81520,0rcu_preempt19-21ksoftirqd/119:12:401
10050520,0irq/346-48484004386-21ssh00:08:340
10050520,0irq/346-484840020240-21ssh00:24:510
81510,0rcu_preempt3-21ksoftirqd/021:48:280
10050510,0irq/346-4848400851-21rngd00:28:540
81500,0rcu_preempt3-21ksoftirqd/021:13:190
81500,0rcu_preempt3-21ksoftirqd/021:13:190
81500,0rcu_preempt3-21ksoftirqd/020:02:380
1161899506,0cyclictest12992-21awk20:47:541
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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