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2026-05-19 - 17:03

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 Tue May 19, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811380,0rcu_preempt3-21ksoftirqd/011:08:270
811380,0rcu_preempt28951-21dropbear07:18:140
811040,0rcu_preempt3-21ksoftirqd/008:33:230
81860,0rcu_preempt3-21ksoftirqd/012:13:150
81850,0rcu_preempt851-21rngd09:41:340
81840,0rcu_preempt3-21ksoftirqd/008:14:200
81820,0rcu_preempt3-21ksoftirqd/010:58:220
81800,0rcu_preempt3-21ksoftirqd/011:42:250
81800,0rcu_preempt3-21ksoftirqd/008:11:390
81790,0rcu_preempt3-21ksoftirqd/009:48:110
81790,0rcu_preempt3-21ksoftirqd/007:08:100
81770,0rcu_preempt3-21ksoftirqd/009:43:260
81760,0rcu_preempt54-21kswapd011:33:180
81750,0rcu_preempt3-21ksoftirqd/012:07:130
81740,0rcu_preempt3-21ksoftirqd/012:36:000
81740,0rcu_preempt3-21ksoftirqd/012:23:310
81740,0rcu_preempt3-21ksoftirqd/010:54:480
81740,0rcu_preempt3-21ksoftirqd/010:33:170
81740,0rcu_preempt3-21ksoftirqd/010:33:170
81740,0rcu_preempt25304-21cyclictest12:11:570
10050740,0irq/346-4848400171rcuc/109:59:481
81730,0rcu_preempt5002-21kworker/0:211:44:490
81710,0rcu_preempt3-21ksoftirqd/008:06:020
81700,0rcu_preempt3-21ksoftirqd/010:05:290
10050690,0irq/346-4848400171rcuc/110:39:261
81680,0rcu_preempt3-21ksoftirqd/011:54:120
81680,0rcu_preempt3-21ksoftirqd/011:48:060
81670,0rcu_preempt851-21rngd11:32:480
81670,0rcu_preempt3-21ksoftirqd/010:37:590
81650,0rcu_preempt3-21ksoftirqd/012:29:010
81650,0rcu_preempt3-21ksoftirqd/011:22:070
10050650,0irq/346-484840028891-1kworker/1:1H11:16:561
81640,0rcu_preempt3-21ksoftirqd/012:22:300
81640,0rcu_preempt3-21ksoftirqd/011:58:140
10050640,0irq/346-48484004555-1kworker/1:0H09:46:421
81630,0rcu_preempt3-21ksoftirqd/010:43:200
81620,0rcu_preempt3-21ksoftirqd/010:28:570
81610,0rcu_preempt3-21ksoftirqd/011:23:190
81610,0rcu_preempt3-21ksoftirqd/010:25:230
81610,0rcu_preempt3-21ksoftirqd/010:18:250
10050610,0irq/346-484840054-21kswapd009:15:031
10050610,0irq/346-484840018407-1kworker/1:0H12:13:111
81600,0rcu_preempt3-21ksoftirqd/007:58:100
81600,0rcu_preempt3-21ksoftirqd/007:53:220
81600,0rcu_preempt3-21ksoftirqd/007:53:220
81600,0rcu_preempt3-21ksoftirqd/007:43:110
10050600,0irq/346-48484006800-1kworker/1:0H10:24:311
81590,0rcu_preempt3-21ksoftirqd/010:52:500
81590,0rcu_preempt3-21ksoftirqd/007:38:090
10050590,0irq/346-484840032016-1kworker/1:3H09:50:141
10050590,0irq/346-484840028891-1kworker/1:1H11:18:341
81580,0rcu_preempt3-21ksoftirqd/009:33:210
10050580,0irq/346-48484007220-1kworker/1:0H09:29:121
10050580,0irq/346-48484002278-1kworker/1:1H09:10:211
10050580,0irq/346-484840022061-1kworker/1:1H09:38:261
10050580,0irq/346-484840012175-1kworker/1:2H09:20:231
81570,0rcu_preempt3-21ksoftirqd/010:08:240
81570,0rcu_preempt3-21ksoftirqd/008:41:310
81570,0rcu_preempt3-21ksoftirqd/007:28:300
10050570,0irq/346-484840081rcu_preempt09:28:270
10050570,0irq/346-48484006367-1kworker/1:0H11:28:151
10050570,0irq/346-48484003563-1kworker/1:0H12:03:061
10050570,0irq/346-484840016695-1kworker/1:0H10:30:491
81560,0rcu_preempt3-21ksoftirqd/009:54:190
81560,0rcu_preempt3-21ksoftirqd/007:23:210
81560,0rcu_preempt19-21ksoftirqd/108:19:451
81560,0rcu_preempt19-21ksoftirqd/108:19:451
10050560,0irq/346-48484007220-1kworker/1:0H09:24:301
10050560,0irq/346-484840054-21kswapd012:33:581
10050560,0irq/346-48484001848-1kworker/1:1H10:15:461
10050560,0irq/346-484840016695-1kworker/1:0H10:33:451
10050560,0irq/346-484840016695-1kworker/1:0H10:33:451
81550,0rcu_preempt3-21ksoftirqd/008:43:220
81550,0rcu_preempt19-21ksoftirqd/108:24:391
81550,0rcu_preempt19-21ksoftirqd/108:05:581
81550,0rcu_preempt19-21ksoftirqd/108:01:011
10050550,0irq/346-48484009495-1kworker/0:2H09:58:130
10050550,0irq/346-484840030319-1kworker/0:2H09:08:010
10050550,0irq/346-484840029303-1kworker/1:0H10:10:411
10050550,0irq/346-484840013442-1kworker/1:2H12:09:001
10050550,0irq/346-484840011278-1kworker/1:2H11:33:371
81540,0rcu_preempt27314-21ntpq11:13:220
81540,0rcu_preempt19-21ksoftirqd/108:14:451
10050540,0irq/346-48484005719-1kworker/1:0H12:32:261
10050540,0irq/346-484840054-21kswapd011:25:111
10050540,0irq/346-484840054-21kswapd011:06:481
10050540,0irq/346-484840054-21kswapd010:57:371
10050540,0irq/346-484840028265-1kworker/1:0H12:20:411
10050540,0irq/346-484840021192-1kworker/1:2H11:43:491
10050540,0irq/346-484840019402-1kworker/1:1H10:03:231
10050530,0irq/346-484840027024-1kworker/1:0H09:37:201
10050530,0irq/346-484840014436-1kworker/1:0H09:57:241
10050520,0irq/346-484840054-21kswapd012:23:301
10050520,0irq/346-484840054-21kswapd010:47:051
10050520,0irq/346-484840023993-21ssh07:03:110
10050510,0irq/346-484840054-21kswapd010:16:430
81500,0rcu_preempt3-21ksoftirqd/008:53:120
10050500,0irq/346-484840028891-1kworker/1:1H11:49:311
81490,0rcu_preempt3-21ksoftirqd/009:18:190
81490,0rcu_preempt19-21ksoftirqd/110:58:101
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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