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2026-03-10 - 04:32

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 highest latencies:
System rackaslot5s.osadl.org (updated Tue Mar 10, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81780,0rcu_preempt3-21ksoftirqd/021:49:500
81780,0rcu_preempt1416-21kworker/0:022:32:460
81740,0rcu_preempt3-21ksoftirqd/023:17:410
81740,0rcu_preempt3-21ksoftirqd/022:48:290
81740,0rcu_preempt3-21ksoftirqd/022:16:520
81740,0rcu_preempt3-21ksoftirqd/021:55:020
81740,0rcu_preempt3-21ksoftirqd/019:55:440
81740,0rcu_preempt3-21ksoftirqd/000:04:110
81740,0rcu_preempt12946-21kworker/0:022:20:090
81730,0rcu_preempt3-21ksoftirqd/021:14:300
81720,0rcu_preempt3-21ksoftirqd/022:04:220
81720,0rcu_preempt0-21swapper/022:10:540
81710,0rcu_preempt3-21ksoftirqd/023:44:090
81710,0rcu_preempt3-21ksoftirqd/023:34:300
81710,0rcu_preempt3-21ksoftirqd/023:28:510
81710,0rcu_preempt3-21ksoftirqd/021:46:020
81710,0rcu_preempt3-21ksoftirqd/021:42:450
81710,0rcu_preempt3-21ksoftirqd/020:21:280
81710,0rcu_preempt3-21ksoftirqd/020:10:590
81710,0rcu_preempt3-21ksoftirqd/020:06:380
81710,0rcu_preempt3-21ksoftirqd/019:15:070
81710,0rcu_preempt3-21ksoftirqd/000:26:560
81710,0rcu_preempt3-21ksoftirqd/000:15:180
81710,0rcu_preempt3-21ksoftirqd/000:02:530
81700,0rcu_preempt9728-21cyclictest21:29:240
81700,0rcu_preempt3-21ksoftirqd/023:58:540
81700,0rcu_preempt3-21ksoftirqd/023:49:310
81700,0rcu_preempt3-21ksoftirqd/023:42:570
81700,0rcu_preempt3-21ksoftirqd/023:33:030
81700,0rcu_preempt3-21ksoftirqd/023:08:150
81700,0rcu_preempt3-21ksoftirqd/022:57:480
81700,0rcu_preempt3-21ksoftirqd/022:39:260
81700,0rcu_preempt3-21ksoftirqd/021:59:590
81700,0rcu_preempt3-21ksoftirqd/021:24:350
81700,0rcu_preempt3-21ksoftirqd/020:14:090
81700,0rcu_preempt3-21ksoftirqd/019:49:280
81700,0rcu_preempt3-21ksoftirqd/000:21:550
81700,0rcu_preempt19-21ksoftirqd/123:31:301
81700,0rcu_preempt0-21swapper/023:12:310
81690,0rcu_preempt3-21ksoftirqd/023:00:140
81690,0rcu_preempt3-21ksoftirqd/022:34:060
81690,0rcu_preempt3-21ksoftirqd/022:24:100
81690,0rcu_preempt3-21ksoftirqd/021:11:350
81690,0rcu_preempt3-21ksoftirqd/020:35:250
81690,0rcu_preempt3-21ksoftirqd/020:28:260
81690,0rcu_preempt3-21ksoftirqd/020:00:360
81690,0rcu_preempt3-21ksoftirqd/020:00:360
81690,0rcu_preempt3-21ksoftirqd/019:09:310
81690,0rcu_preempt3-21ksoftirqd/000:13:170
81680,0rcu_preempt3-21ksoftirqd/021:23:040
81680,0rcu_preempt3-21ksoftirqd/021:04:280
81680,0rcu_preempt3-21ksoftirqd/021:03:480
81680,0rcu_preempt3-21ksoftirqd/020:58:120
81680,0rcu_preempt3-21ksoftirqd/020:44:090
81680,0rcu_preempt3-21ksoftirqd/019:19:160
81680,0rcu_preempt3-21ksoftirqd/000:38:260
81670,0rcu_preempt3-21ksoftirqd/022:50:510
81670,0rcu_preempt3-21ksoftirqd/020:50:140
81670,0rcu_preempt3-21ksoftirqd/020:40:190
81670,0rcu_preempt3-21ksoftirqd/000:33:530
81670,0rcu_preempt19-21ksoftirqd/100:09:281
81660,0rcu_preempt3-21ksoftirqd/021:37:300
81660,0rcu_preempt3-21ksoftirqd/020:29:060
81650,0rcu_preempt3-21ksoftirqd/023:19:080
81640,0rcu_preempt3-21ksoftirqd/019:44:370
81640,0rcu_preempt17924-1kworker/1:0H00:28:151
81630,0rcu_preempt3-21ksoftirqd/019:42:490
81630,0rcu_preempt19-21ksoftirqd/122:44:051
81620,0rcu_preempt19-21ksoftirqd/123:24:301
81610,0rcu_preempt19-21ksoftirqd/122:19:321
81610,0rcu_preempt19-21ksoftirqd/100:04:331
81610,0rcu_preempt14300-21kworker/0:119:25:490
81610,0rcu_preempt14300-21kworker/0:119:25:490
81570,0rcu_preempt19-21ksoftirqd/100:14:341
81560,0rcu_preempt3-21ksoftirqd/019:29:370
81560,0rcu_preempt19-21ksoftirqd/121:39:321
9950550,0irq/345-4848400851-21rngd00:02:571
81550,0rcu_preempt3-21ksoftirqd/019:37:210
10050550,0irq/346-484840081rcu_preempt22:03:441
10050540,0irq/346-484840054-21kswapd022:52:221
9950510,0irq/345-4848400181ktimersoftd/122:11:221
10050510,0irq/346-48484003368-1kworker/1:1H23:05:481
81500,0rcu_preempt3-21ksoftirqd/019:04:270
9950470,0irq/345-4848400181ktimersoftd/123:40:031
9950460,0irq/345-4848400181ktimersoftd/122:28:181
81450,0rcu_preempt9313-21ntp_kernel_pll_20:44:281
81450,0rcu_preempt17038-21awk23:19:291
81450,0rcu_preempt0-21swapper/121:24:161
10050450,0irq/346-484840020424-21ssh23:55:301
10050450,0irq/346-484840013012-21ping19:19:391
81430,0rcu_preempt25779-21ping20:09:221
81430,0rcu_preempt0-21swapper/119:49:161
81420,0rcu_preempt14773-21kworker/1:122:34:331
81420,0rcu_preempt13776-21munin-node1
10050420,0irq/346-484840023913-21munin-run21:49:051
10050420,0irq/346-484840010789-21ssh00:19:141
10050420,0irq/346-48484000-21swapper/121:14:181
9950410,0irq/345-48484009877-1kworker/1:0H20:49:221
81410,0rcu_preempt31797-21ntp_kernel_pll_23:34:261
81410,0rcu_preempt24282-21kworker/1:221:29:271
81410,0rcu_preempt19-21ksoftirqd/121:49:281
81410,0rcu_preempt18052-21ssh21:09:331
10050410,0irq/346-4848400460-21ssh22:29:551
10050410,0irq/346-484840031289-21ssh21:23:401
10050410,0irq/346-484840030162-21ssh22:59:421
10050410,0irq/346-484840027813-1kworker/1:3H00:37:491
10050410,0irq/346-484840011389-21ssh21:35:371
81400,0rcu_preempt25779-21ping20:14:371
81400,0rcu_preempt19-21ksoftirqd/119:35:111
81400,0rcu_preempt19-21ksoftirqd/119:24:401
81400,0rcu_preempt19-21ksoftirqd/119:24:401
81400,0rcu_preempt19-21ksoftirqd/119:04:281
81400,0rcu_preempt19-21ksoftirqd/100:29:401
81400,0rcu_preempt16865-21if_eth019:29:271
81400,0rcu_preempt10509-21munin-node1
10050400,0irq/346-484840016530-21sh22:14:141
10050400,0irq/346-484840012725-21ssh23:48:241
973099395,0cyclictest12816-21ssh23:14:591
81390,0rcu_preempt6679-21ssh22:04:161
81390,0rcu_preempt19-21ksoftirqd/121:54:201
81390,0rcu_preempt19-21ksoftirqd/120:39:251
81390,0rcu_preempt19-21ksoftirqd/119:57:261
81390,0rcu_preempt19-21ksoftirqd/119:40:141
10050390,0irq/346-484840027077-21ssh22:57:111
10050390,0irq/346-484840012832-21ssh22:43:021
9950380,0irq/345-484840025779-21ping20:04:351
81380,0rcu_preempt16728-21diskmemload23:11:571
81380,0rcu_preempt0-21swapper/120:34:181
81380,0rcu_preempt0-21swapper/120:19:171
10050370,0irq/346-484840025779-21ping20:24:181
10050370,0irq/346-484840021487-21wget19:44:181
81360,0rcu_preempt19-21ksoftirqd/121:04:301
81360,0rcu_preempt19-21ksoftirqd/119:18:361
81360,0rcu_preempt0-21swapper/120:01:481
81360,0rcu_preempt0-21swapper/120:01:481
10050360,0irq/346-48484000-21swapper/120:59:271
81350,0rcu_preempt19-21ksoftirqd/120:29:271
130112350,0chrt11515-1kworker/1:1H20:54:411
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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