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2026-06-20 - 05:23

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 Sat Jun 20, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10050820,0irq/346-4848400111rcuc/000:32:530
81810,0rcu_preempt22938-21kworker/0:021:35:310
10050810,0irq/346-4848400111rcuc/021:50:350
10050800,0irq/346-4848400111rcuc/021:46:020
81790,0rcu_preempt19-21ksoftirqd/119:25:241
10050790,0irq/346-4848400111rcuc/021:20:350
81760,0rcu_preempt3-21ksoftirqd/023:53:050
81760,0rcu_preempt3-21ksoftirqd/021:39:010
81760,0rcu_preempt3-21ksoftirqd/000:26:140
81740,0rcu_preempt3-21ksoftirqd/023:47:550
81740,0rcu_preempt3-21ksoftirqd/023:16:200
81740,0rcu_preempt19-21ksoftirqd/123:44:281
81740,0rcu_preempt19-21ksoftirqd/122:40:271
81740,0rcu_preempt19-21ksoftirqd/122:25:521
81730,0rcu_preempt3-21ksoftirqd/023:42:240
81730,0rcu_preempt3-21ksoftirqd/021:27:010
81720,0rcu_preempt3-21ksoftirqd/022:07:030
10050720,0irq/346-484840041ktimersoftd/023:29:190
81710,0rcu_preempt54-21kswapd021:37:041
81710,0rcu_preempt19-21ksoftirqd/122:58:481
81700,0rcu_preempt3-21ksoftirqd/022:41:230
81700,0rcu_preempt19-21ksoftirqd/100:29:351
81690,0rcu_preempt3-21ksoftirqd/022:34:260
81690,0rcu_preempt3-21ksoftirqd/022:12:100
81690,0rcu_preempt3-21ksoftirqd/021:15:020
81690,0rcu_preempt19-21ksoftirqd/121:59:201
81680,0rcu_preempt19-21ksoftirqd/119:27:411
81670,0rcu_preempt19-21ksoftirqd/123:23:071
81670,0rcu_preempt19-21ksoftirqd/123:20:051
81670,0rcu_preempt19-21ksoftirqd/122:53:301
81660,0rcu_preempt3-21ksoftirqd/021:29:370
81660,0rcu_preempt19-21ksoftirqd/121:28:281
81640,0rcu_preempt19-21ksoftirqd/121:38:221
81640,0rcu_preempt19-21ksoftirqd/100:23:001
81630,0rcu_preempt19-21ksoftirqd/123:38:111
81630,0rcu_preempt19-21ksoftirqd/121:21:021
81630,0rcu_preempt19-21ksoftirqd/121:09:021
10050630,0irq/346-484840022665-1kworker/1:1H21:43:381
81620,0rcu_preempt19-21ksoftirqd/122:13:151
10050620,0irq/346-484840024381-1kworker/1:1H00:14:511
81610,0rcu_preempt19-21ksoftirqd/100:02:151
81610,0rcu_preempt10050irq/346-484840019:27:560
10050610,0irq/346-48484007144-1kworker/1:1H23:30:231
10050610,0irq/346-484840032257-1kworker/1:2H22:45:501
10050610,0irq/346-484840032257-1kworker/1:2H22:45:501
10050610,0irq/346-484840017062-1kworker/1:2H23:36:141
81600,0rcu_preempt0-21swapper/021:08:130
2612999609,0cyclictest29410-21ping19:42:380
10050600,0irq/346-484840054-21kswapd000:09:541
10050600,0irq/346-484840022323-1kworker/1:0H22:35:491
10050590,0irq/346-48484006856-1kworker/1:1H00:33:261
10050590,0irq/346-484840032257-1kworker/1:2H22:48:301
10050590,0irq/346-484840017365-1kworker/1:1H22:32:171
81580,0rcu_preempt3-21ksoftirqd/019:38:020
10050580,0irq/346-484840015852-1kworker/1:0H21:57:121
10050570,0irq/346-484840054-21kswapd021:15:471
10050570,0irq/346-484840031944-1kworker/1:0H23:50:551
10050570,0irq/346-48484002472-1kworker/1:0H22:18:451
81560,0rcu_preempt3-21ksoftirqd/022:55:130
81560,0rcu_preempt3-21ksoftirqd/020:23:110
81560,0rcu_preempt18421-21unixbench_singl00:07:560
10050560,0irq/346-484840054-21kswapd023:09:321
81550,0rcu_preempt32256-1kworker/0:0H22:45:240
81550,0rcu_preempt32256-1kworker/0:0H22:45:240
81550,0rcu_preempt3-21ksoftirqd/020:11:580
10050550,0irq/346-48484009502-1kworker/1:3H00:02:431
81540,0rcu_preempt9866-21ping19:57:370
81540,0rcu_preempt19-21ksoftirqd/120:02:381
10050540,0irq/346-484840054-21kswapd022:24:160
10050540,0irq/346-484840032601-1kworker/1:2H21:48:441
10050540,0irq/346-484840029914-1kworker/1:3H22:10:021
81530,0rcu_preempt3-21ksoftirqd/020:15:500
81530,0rcu_preempt19971-21kworker/0:120:37:370
10050530,0irq/346-484840015758-21sh21:54:430
81520,0rcu_preempt3-21ksoftirqd/023:42:530
81520,0rcu_preempt3-21ksoftirqd/000:19:210
81520,0rcu_preempt19-21ksoftirqd/120:02:271
81520,0rcu_preempt1619-21kworker/0:100:04:170
10050520,0irq/346-48484008563-1kworker/1:2H21:23:411
10050520,0irq/346-48484004512-1kworker/1:2H23:56:311
81510,0rcu_preempt3-21ksoftirqd/022:57:430
81510,0rcu_preempt3-21ksoftirqd/022:27:360
81510,0rcu_preempt3-21ksoftirqd/020:52:440
81510,0rcu_preempt26128-21cyclictest23:02:431
10050510,0irq/346-484840030228-21ssh23:14:501
10050510,0irq/346-484840028758-21ssh00:18:241
81500,0rcu_preempt9866-21ping20:02:550
81500,0rcu_preempt3-21ksoftirqd/023:58:070
81500,0rcu_preempt3-21ksoftirqd/022:17:380
81500,0rcu_preempt19-21ksoftirqd/120:11:101
81500,0rcu_preempt19-21ksoftirqd/119:43:201
81500,0rcu_preempt19-21ksoftirqd/119:12:461
81500,0rcu_preempt19-21ksoftirqd/119:02:371
10050500,0irq/346-484840054-21kswapd022:48:590
81490,0rcu_preempt3-21ksoftirqd/023:11:360
81490,0rcu_preempt3-21ksoftirqd/019:47:510
81490,0rcu_preempt19-21ksoftirqd/120:22:501
81490,0rcu_preempt19-21ksoftirqd/120:12:471
81490,0rcu_preempt18097-21kworker/0:020:22:160
10050490,0irq/346-484840054-21kswapd022:00:460
81480,0rcu_preempt375-21kworker/0:021:06:020
81480,0rcu_preempt3-21ksoftirqd/019:02:490
81480,0rcu_preempt29034-21kworker/0:222:14:510
10050480,0irq/346-484840054-21kswapd023:05:540
81470,0rcu_preempt3-21ksoftirqd/023:21:250
81470,0rcu_preempt3-21ksoftirqd/020:57:530
81470,0rcu_preempt3-21ksoftirqd/000:32:120
81470,0rcu_preempt22341-21memory20:32:481
81470,0rcu_preempt19-21ksoftirqd/120:17:431
81470,0rcu_preempt19-21ksoftirqd/119:39:331
81470,0rcu_preempt0-21swapper/023:24:150
10050470,0irq/346-484840025715-1kworker/1:0H22:05:031
81460,0rcu_preempt3-21ksoftirqd/023:35:410
81460,0rcu_preempt3-21ksoftirqd/019:52:380
10050460,0irq/346-484840029410-21ping19:19:121
10050460,0irq/346-484840014766-1kworker/1:3H20:37:431
81450,0rcu_preempt3-21ksoftirqd/020:42:440
81450,0rcu_preempt3-21ksoftirqd/000:17:260
81450,0rcu_preempt19-21ksoftirqd/119:37:241
81450,0rcu_preempt19-21ksoftirqd/119:37:241
81440,0rcu_preempt8941-21kworker/0:119:16:050
81440,0rcu_preempt54-21kswapd020:48:030
81440,0rcu_preempt54-21kswapd020:43:391
81440,0rcu_preempt3-21ksoftirqd/020:35:110
81440,0rcu_preempt3-21ksoftirqd/020:27:460
81440,0rcu_preempt19-21ksoftirqd/119:52:451
81430,0rcu_preempt8941-21kworker/0:119:22:020
81430,0rcu_preempt19-21ksoftirqd/121:02:451
81420,0rcu_preempt19-21ksoftirqd/120:57:551
81420,0rcu_preempt19-21ksoftirqd/119:07:441
81410,0rcu_preempt31205-21munin-node0
81400,0rcu_preempt3-21ksoftirqd/019:07:530
81400,0rcu_preempt19-21ksoftirqd/120:27:511
81400,0rcu_preempt19-21ksoftirqd/119:47:441
81380,0rcu_preempt3-21ksoftirqd/019:33:040
81380,0rcu_preempt3-21ksoftirqd/019:33:040
81380,0rcu_preempt19-21ksoftirqd/120:52:431
81360,0rcu_preempt1470-21runrttasks20:49:331
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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