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2026-07-07 - 17:50

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 Jul 07, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811160,0rcu_preempt19-21ksoftirqd/110:56:281
811120,0rcu_preempt19-21ksoftirqd/109:59:121
811090,0rcu_preempt54-21kswapd011:10:591
811090,0rcu_preempt19-21ksoftirqd/112:36:171
811080,0rcu_preempt7158-21kworker/1:009:33:031
811080,0rcu_preempt4586-21kworker/1:211:54:071
811070,0rcu_preempt19-21ksoftirqd/111:27:331
811070,0rcu_preempt19-21ksoftirqd/109:49:161
811070,0rcu_preempt19-21ksoftirqd/109:15:551
811050,0rcu_preempt0-21swapper/111:15:461
811040,0rcu_preempt19-21ksoftirqd/111:06:301
811030,0rcu_preempt19-21ksoftirqd/112:12:581
811030,0rcu_preempt19-21ksoftirqd/110:49:271
811020,0rcu_preempt19-21ksoftirqd/109:42:321
811010,0rcu_preempt19-21ksoftirqd/111:58:041
811010,0rcu_preempt19-21ksoftirqd/110:27:011
81990,0rcu_preempt19-21ksoftirqd/110:32:501
81990,0rcu_preempt19-21ksoftirqd/109:40:581
81980,0rcu_preempt0-21swapper/109:18:011
81970,0rcu_preempt0-21swapper/110:13:491
81970,0rcu_preempt0-21swapper/110:13:491
81970,0rcu_preempt0-21swapper/110:09:451
81960,0rcu_preempt19-21ksoftirqd/112:27:521
81960,0rcu_preempt19-21ksoftirqd/109:10:021
81950,0rcu_preempt19-21ksoftirqd/110:39:061
81930,0rcu_preempt8189-21ssh12:08:121
81930,0rcu_preempt19-21ksoftirqd/110:29:311
81930,0rcu_preempt19-21ksoftirqd/107:24:151
81930,0rcu_preempt19-21ksoftirqd/107:24:151
81910,0rcu_preempt19-21ksoftirqd/112:19:011
81910,0rcu_preempt19-21ksoftirqd/112:04:341
81910,0rcu_preempt19-21ksoftirqd/110:42:331
81910,0rcu_preempt19-21ksoftirqd/109:22:271
81900,0rcu_preempt19-21ksoftirqd/111:47:221
81880,0rcu_preempt851-21rngd11:23:291
81880,0rcu_preempt19-21ksoftirqd/111:18:471
81880,0rcu_preempt19-21ksoftirqd/109:27:271
81850,0rcu_preempt19-21ksoftirqd/107:37:561
81850,0rcu_preempt19-21ksoftirqd/107:07:291
81840,0rcu_preempt19-21ksoftirqd/112:26:131
81830,0rcu_preempt19-21ksoftirqd/111:41:041
81830,0rcu_preempt19-21ksoftirqd/108:00:181
81820,0rcu_preempt19-21ksoftirqd/108:27:031
81820,0rcu_preempt19-21ksoftirqd/108:13:291
81820,0rcu_preempt19-21ksoftirqd/107:42:171
81820,0rcu_preempt19-21ksoftirqd/107:34:291
81820,0rcu_preempt19-21ksoftirqd/107:34:291
81820,0rcu_preempt19-21ksoftirqd/107:30:181
81810,0rcu_preempt19-21ksoftirqd/110:18:281
81810,0rcu_preempt19-21ksoftirqd/108:04:061
81800,0rcu_preempt19-21ksoftirqd/111:43:401
81800,0rcu_preempt19-21ksoftirqd/111:43:401
81800,0rcu_preempt19-21ksoftirqd/108:19:111
81800,0rcu_preempt19-21ksoftirqd/108:19:111
81790,0rcu_preempt19-21ksoftirqd/108:57:401
81790,0rcu_preempt19-21ksoftirqd/108:57:401
81790,0rcu_preempt19-21ksoftirqd/107:17:301
81780,0rcu_preempt19-21ksoftirqd/108:55:161
81780,0rcu_preempt19-21ksoftirqd/108:08:461
81770,0rcu_preempt54-21kswapd011:33:511
81770,0rcu_preempt19-21ksoftirqd/110:07:031
81770,0rcu_preempt19-21ksoftirqd/108:29:081
81760,0rcu_preempt19-21ksoftirqd/109:55:391
81760,0rcu_preempt19-21ksoftirqd/107:47:241
81750,0rcu_preempt19-21ksoftirqd/110:58:571
81740,0rcu_preempt0-21swapper/109:02:261
10050740,0irq/346-4848400358-1kworker/0:2H09:54:090
10050740,0irq/346-48484003127-1kworker/0:0H09:22:220
81730,0rcu_preempt19-21ksoftirqd/108:45:081
81730,0rcu_preempt19-21ksoftirqd/108:38:051
81720,0rcu_preempt54-21kswapd007:17:380
81720,0rcu_preempt19-21ksoftirqd/108:37:091
81720,0rcu_preempt19-21ksoftirqd/107:12:301
81710,0rcu_preempt19-21ksoftirqd/107:57:081
10050710,0irq/346-484840024008-1kworker/0:1H11:31:330
10050700,0irq/346-48484004151-1kworker/0:1H11:04:070
10050700,0irq/346-48484001881-1kworker/0:1H10:24:240
10050690,0irq/346-484840016364-1kworker/0:2H11:44:530
10050690,0irq/346-484840016364-1kworker/0:2H11:44:530
81670,0rcu_preempt19-21ksoftirqd/108:47:481
81660,0rcu_preempt3-21ksoftirqd/009:07:130
81650,0rcu_preempt54-21kswapd011:52:280
81650,0rcu_preempt11826-21kworker/0:210:44:350
10050620,0irq/346-48484003214-1kworker/0:1H08:12:260
81610,0rcu_preempt54-21kswapd011:38:380
10050600,0irq/346-484840025633-1kworker/0:0H09:13:130
10050600,0irq/346-484840013014-1kworker/0:0H09:31:430
81590,0rcu_preempt54-21kswapd011:15:560
81550,0rcu_preempt3-21ksoftirqd/011:51:070
10050540,0irq/346-484840054-21kswapd010:16:430
10050540,0irq/346-484840054-21kswapd010:16:430
10050540,0irq/346-48484000-21swapper/012:17:210
10050530,0irq/346-484840054-21kswapd010:47:550
4350520,0irq/32-433000000-21swapper/008:17:250
4350520,0irq/32-433000000-21swapper/008:17:250
10050520,0irq/346-484840054-21kswapd010:57:000
10050520,0irq/346-484840054-21kswapd009:17:320
10050510,0irq/346-484840054-21kswapd010:37:420
81500,0rcu_preempt3-21ksoftirqd/007:02:280
10050500,0irq/346-484840054-21kswapd010:19:480
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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