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2026-04-21 - 06:39

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 Tue Apr 21, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811150,0rcu_preempt19-21ksoftirqd/121:55:391
811120,0rcu_preempt19-21ksoftirqd/123:24:171
811060,0rcu_preempt19-21ksoftirqd/121:23:431
811020,0rcu_preempt19-21ksoftirqd/123:53:421
811000,0rcu_preempt8537-21ssh22:11:411
811000,0rcu_preempt19-21ksoftirqd/122:48:521
81990,0rcu_preempt19-21ksoftirqd/123:33:411
81980,0rcu_preempt19-21ksoftirqd/120:18:471
81980,0rcu_preempt0-21swapper/121:52:091
81970,0rcu_preempt54-21kswapd023:31:181
81970,0rcu_preempt19-21ksoftirqd/123:19:251
81960,0rcu_preempt19-21ksoftirqd/100:38:111
81950,0rcu_preempt19-21ksoftirqd/121:42:311
81950,0rcu_preempt19-21ksoftirqd/121:21:161
81940,0rcu_preempt19-21ksoftirqd/121:47:151
81940,0rcu_preempt19-21ksoftirqd/100:01:001
81930,0rcu_preempt6678-21ssh22:43:061
81920,0rcu_preempt19-21ksoftirqd/100:06:061
81910,0rcu_preempt19-21ksoftirqd/122:24:231
81890,0rcu_preempt19-21ksoftirqd/123:14:281
81890,0rcu_preempt19-21ksoftirqd/123:14:281
81890,0rcu_preempt19-21ksoftirqd/100:23:351
81880,0rcu_preempt19-21ksoftirqd/119:41:451
81880,0rcu_preempt0-21swapper/120:48:401
81870,0rcu_preempt19-21ksoftirqd/123:02:291
81870,0rcu_preempt19-21ksoftirqd/122:19:161
81860,0rcu_preempt19-21ksoftirqd/123:43:551
81860,0rcu_preempt19-21ksoftirqd/121:09:291
81860,0rcu_preempt19-21ksoftirqd/120:43:461
81840,0rcu_preempt19-21ksoftirqd/122:07:031
81830,0rcu_preempt19-21ksoftirqd/119:58:421
81830,0rcu_preempt19-21ksoftirqd/100:28:491
81810,0rcu_preempt5025-21kworker/1:223:43:091
81810,0rcu_preempt19-21ksoftirqd/122:32:591
81810,0rcu_preempt19-21ksoftirqd/121:16:111
81810,0rcu_preempt19-21ksoftirqd/121:03:521
81810,0rcu_preempt19-21ksoftirqd/121:03:521
81810,0rcu_preempt19-21ksoftirqd/120:24:001
81800,0rcu_preempt19-21ksoftirqd/123:08:251
81800,0rcu_preempt19-21ksoftirqd/119:43:481
81800,0rcu_preempt19-21ksoftirqd/119:18:381
81800,0rcu_preempt19-21ksoftirqd/119:18:251
81800,0rcu_preempt1049-21avahi-daemon20:32:041
81790,0rcu_preempt19-21ksoftirqd/123:05:281
81790,0rcu_preempt19-21ksoftirqd/120:04:361
81780,0rcu_preempt2753-21munin-run00:18:241
81770,0rcu_preempt10763-21diskmemload23:48:461
81770,0rcu_preempt10688-21df_abs19:28:391
81760,0rcu_preempt19-21ksoftirqd/119:35:571
81750,0rcu_preempt54-21kswapd000:23:181
81750,0rcu_preempt19-21ksoftirqd/120:15:091
81750,0rcu_preempt14806-21kworker/1:100:10:581
81730,0rcu_preempt19-21ksoftirqd/120:12:551
81720,0rcu_preempt54-21kswapd022:36:031
81720,0rcu_preempt19-21ksoftirqd/121:37:071
81720,0rcu_preempt19-21ksoftirqd/121:28:401
81720,0rcu_preempt17433-21if_err_eth219:48:491
10050720,0irq/346-484840021074-1kworker/0:2H22:27:170
81710,0rcu_preempt3-21ksoftirqd/022:10:120
81710,0rcu_preempt19-21ksoftirqd/119:25:291
10050710,0irq/346-484840054-21kswapd000:07:230
10050710,0irq/346-484840023656-1kworker/0:1H21:23:540
81700,0rcu_preempt19-21ksoftirqd/122:17:191
10050700,0irq/346-484840029091-1kworker/0:2H23:09:570
10050700,0irq/346-484840015244-1kworker/0:3H00:33:300
81690,0rcu_preempt3-21ksoftirqd/021:49:520
81690,0rcu_preempt19-21ksoftirqd/121:58:381
81690,0rcu_preempt19-21ksoftirqd/119:53:431
81690,0rcu_preempt19-21ksoftirqd/119:53:431
81680,0rcu_preempt3-21ksoftirqd/000:08:460
81680,0rcu_preempt19-21ksoftirqd/122:55:411
81680,0rcu_preempt19-21ksoftirqd/120:58:361
81670,0rcu_preempt54-21kswapd021:28:460
81660,0rcu_preempt19-21ksoftirqd/119:08:491
81660,0rcu_preempt19-21ksoftirqd/119:08:491
296782650,0chrt10050irq/346-484840020:24:440
81640,0rcu_preempt19-21ksoftirqd/122:43:341
81620,0rcu_preempt19-21ksoftirqd/120:38:501
81620,0rcu_preempt19-21ksoftirqd/120:36:541
283192620,0chrt10050irq/346-484840020:22:420
81590,0rcu_preempt3-21ksoftirqd/023:58:460
10050590,0irq/346-484840031753-1kworker/0:1H00:17:070
81580,0rcu_preempt3-21ksoftirqd/021:53:530
81570,0rcu_preempt54-21kswapd023:38:230
81560,0rcu_preempt19-21ksoftirqd/120:54:371
81560,0rcu_preempt19-21ksoftirqd/119:08:261
81550,0rcu_preempt3-21ksoftirqd/021:08:260
81550,0rcu_preempt3-21ksoftirqd/021:08:260
81530,0rcu_preempt3-21ksoftirqd/022:18:260
1599510,0migration/04849-21if_eth323:13:460
1599510,0migration/04849-21if_eth323:13:460
10050510,0irq/346-48484009857-1kworker/0:2H22:13:330
10050500,0irq/346-48484004670-21ssh23:46:540
10050490,0irq/346-4848400851-21rngd23:19:000
81470,0rcu_preempt3-21ksoftirqd/021:38:480
10050470,0irq/346-48484001599-1kworker/0:3H23:28:490
10050470,0irq/346-484840011267-21ssh00:26:410
10050470,0irq/346-48484000-21swapper/023:38:520
81460,0rcu_preempt13232-21grep22:48:530
10050460,0irq/346-484840054-21kswapd023:48:430
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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