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2026-08-25 - 17:08

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 Aug 25, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81810,0rcu_preempt3-21ksoftirqd/012:24:360
81800,0rcu_preempt9950irq/345-484840012:04:360
81790,0rcu_preempt4186-21kworker/1:207:24:351
81790,0rcu_preempt19-21ksoftirqd/111:29:501
81780,0rcu_preempt9950irq/345-484840010:09:340
81780,0rcu_preempt19-21ksoftirqd/107:44:311
81770,0rcu_preempt3734-1kworker/0:0H07:34:350
81770,0rcu_preempt3734-1kworker/0:0H07:34:350
81770,0rcu_preempt19-21ksoftirqd/110:45:181
81770,0rcu_preempt19-21ksoftirqd/110:14:281
81770,0rcu_preempt19-21ksoftirqd/108:03:291
81760,0rcu_preempt9340-21kworker/1:112:23:281
81760,0rcu_preempt0-21swapper/108:13:101
81750,0rcu_preempt19-21ksoftirqd/109:53:321
81750,0rcu_preempt19-21ksoftirqd/109:37:121
81750,0rcu_preempt19-21ksoftirqd/108:22:001
81750,0rcu_preempt19-21ksoftirqd/107:27:001
81740,0rcu_preempt8689-21ssh12:28:031
81740,0rcu_preempt26347-21ssh11:07:381
81740,0rcu_preempt19-21ksoftirqd/112:33:411
81740,0rcu_preempt19-21ksoftirqd/111:48:341
81740,0rcu_preempt19-21ksoftirqd/110:16:101
81740,0rcu_preempt19-21ksoftirqd/107:33:361
81740,0rcu_preempt19-21ksoftirqd/107:33:361
81730,0rcu_preempt32260-21ssh11:13:541
81730,0rcu_preempt19-21ksoftirqd/109:25:271
81730,0rcu_preempt19-21ksoftirqd/108:16:361
81730,0rcu_preempt19-21ksoftirqd/108:06:331
81730,0rcu_preempt18092-21ssh10:26:181
81730,0rcu_preempt0-21swapper/110:30:011
81720,0rcu_preempt8861-21kworker/u4:109:34:131
81720,0rcu_preempt30168-21ssh12:16:451
81720,0rcu_preempt19-21ksoftirqd/109:42:541
81720,0rcu_preempt19-21ksoftirqd/108:26:011
81710,0rcu_preempt19-21ksoftirqd/111:58:521
81710,0rcu_preempt19-21ksoftirqd/111:53:391
81710,0rcu_preempt19-21ksoftirqd/110:36:121
81710,0rcu_preempt19-21ksoftirqd/110:20:191
81710,0rcu_preempt19-21ksoftirqd/110:00:141
81710,0rcu_preempt19-21ksoftirqd/109:20:321
81710,0rcu_preempt19-21ksoftirqd/107:35:391
81710,0rcu_preempt15585-21ssh12:02:021
81710,0rcu_preempt1445-21runrttasks07:10:011
81710,0rcu_preempt0-21swapper/108:39:591
81700,0rcu_preempt3-21ksoftirqd/010:54:490
81700,0rcu_preempt19-21ksoftirqd/112:37:281
81700,0rcu_preempt19-21ksoftirqd/112:10:401
81700,0rcu_preempt19-21ksoftirqd/112:08:431
81700,0rcu_preempt19-21ksoftirqd/111:25:391
81700,0rcu_preempt19-21ksoftirqd/111:02:101
81700,0rcu_preempt19-21ksoftirqd/110:57:471
81700,0rcu_preempt19-21ksoftirqd/110:50:011
81700,0rcu_preempt19-21ksoftirqd/110:08:071
81700,0rcu_preempt19-21ksoftirqd/109:56:121
81700,0rcu_preempt19-21ksoftirqd/109:47:111
81690,0rcu_preempt19-21ksoftirqd/109:17:121
81690,0rcu_preempt19-21ksoftirqd/109:17:121
81690,0rcu_preempt19-21ksoftirqd/108:39:011
81690,0rcu_preempt19-21ksoftirqd/107:58:531
81690,0rcu_preempt19-21ksoftirqd/107:45:041
81690,0rcu_preempt0-21swapper/111:15:281
81690,0rcu_preempt0-21swapper/109:04:171
81680,0rcu_preempt3-21ksoftirqd/011:49:480
81680,0rcu_preempt3-21ksoftirqd/011:44:540
81680,0rcu_preempt3-21ksoftirqd/010:39:540
81680,0rcu_preempt19-21ksoftirqd/111:44:331
81680,0rcu_preempt19-21ksoftirqd/107:18:271
81670,0rcu_preempt9995-21ssh11:24:101
81670,0rcu_preempt19-21ksoftirqd/110:43:191
81670,0rcu_preempt1445-21runrttasks11:35:591
81670,0rcu_preempt0-21swapper/109:09:451
10050670,0irq/346-48484006059-1kworker/0:2H09:11:190
81660,0rcu_preempt19-21ksoftirqd/109:04:361
81660,0rcu_preempt19-21ksoftirqd/108:55:281
81660,0rcu_preempt19-21ksoftirqd/108:54:191
81660,0rcu_preempt19-21ksoftirqd/108:45:081
81660,0rcu_preempt19-21ksoftirqd/108:31:341
81660,0rcu_preempt19-21ksoftirqd/107:49:561
10050650,0irq/346-48484005140-1kworker/0:1H11:55:510
81610,0rcu_preempt3-21ksoftirqd/011:15:040
81610,0rcu_preempt0-21swapper/011:11:420
10050610,0irq/346-48484007753-1kworker/0:2H11:31:020
10050610,0irq/346-484840017724-1kworker/0:3H11:35:180
81570,0rcu_preempt3-21ksoftirqd/010:59:580
10050560,0irq/346-484840027291-21cat09:30:070
10050550,0irq/346-484840054-21kswapd010:38:350
10050550,0irq/346-48484005389-1kworker/0:1H10:50:020
10050540,0irq/346-48484003723-1kworker/0:0H10:21:350
10050540,0irq/346-484840025254-1kworker/0:2H11:09:140
10050530,0irq/346-4848400836-21rngd10:46:270
10050530,0irq/346-484840054-21kswapd009:19:580
10050520,0irq/346-484840054-21kswapd010:29:560
10050520,0irq/346-484840054-21kswapd009:39:540
10050520,0irq/346-484840054-21kswapd009:14:420
10050520,0irq/346-484840054-21kswapd009:14:420
10050520,0irq/346-484840026200-1kworker/0:2H10:10:340
10050520,0irq/346-484840011267-1kworker/0:0H10:01:070
81510,0rcu_preempt9950irq/345-484840012:14:350
81510,0rcu_preempt3734-1kworker/0:0H07:40:120
10050510,0irq/346-48484006064-21diskmemload09:39:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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