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2026-04-22 - 04:18

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 highest latencies:
System rackaslot5s.osadl.org (updated Wed Apr 22, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81710,0rcu_preempt3-21ksoftirqd/000:38:030
10050700,0irq/346-4848400111rcuc/022:12:570
81690,0rcu_preempt3-21ksoftirqd/022:54:450
81690,0rcu_preempt3-21ksoftirqd/000:30:290
81690,0rcu_preempt3-21ksoftirqd/000:30:290
81690,0rcu_preempt28412-21ping19:45:350
81690,0rcu_preempt19-21ksoftirqd/119:43:241
81680,0rcu_preempt3-21ksoftirqd/023:45:240
81670,0rcu_preempt3-21ksoftirqd/000:23:340
81660,0rcu_preempt3-21ksoftirqd/023:37:140
81660,0rcu_preempt3-21ksoftirqd/000:17:470
81660,0rcu_preempt3-21ksoftirqd/000:17:470
81650,0rcu_preempt3-21ksoftirqd/023:51:230
81650,0rcu_preempt3-21ksoftirqd/000:07:250
81630,0rcu_preempt3-21ksoftirqd/022:14:260
81620,0rcu_preempt3-21ksoftirqd/023:32:290
81610,0rcu_preempt3-21ksoftirqd/021:13:590
81600,0rcu_preempt3-21ksoftirqd/020:25:000
7142570,0chrt10050irq/346-484840019:31:360
81550,0rcu_preempt3-21ksoftirqd/022:23:420
81550,0rcu_preempt3-21ksoftirqd/022:23:420
81550,0rcu_preempt3-21ksoftirqd/000:19:210
22522550,0chrt10050irq/346-484840019:35:060
81540,0rcu_preempt6801-21kworker/0:122:43:400
81540,0rcu_preempt25012-21kworker/0:019:19:270
81540,0rcu_preempt19-21ksoftirqd/123:34:321
81540,0rcu_preempt19-21ksoftirqd/122:33:461
81540,0rcu_preempt19-21ksoftirqd/122:33:461
81530,0rcu_preempt3-21ksoftirqd/020:12:400
81530,0rcu_preempt3-21ksoftirqd/020:03:360
81530,0rcu_preempt25132-21cyclictest21:38:250
10050530,0irq/346-48484001710-1kworker/0:2H21:45:490
81520,0rcu_preempt3-21ksoftirqd/023:03:450
81520,0rcu_preempt30669-21kworker/0:022:52:540
81520,0rcu_preempt0-21swapper/023:42:430
10050520,0irq/346-4848400851-21rngd20:44:390
81510,0rcu_preempt3-21ksoftirqd/022:35:370
81510,0rcu_preempt3-21ksoftirqd/022:35:370
81510,0rcu_preempt3-21ksoftirqd/021:51:430
81510,0rcu_preempt3-21ksoftirqd/021:28:500
81510,0rcu_preempt3-21ksoftirqd/021:20:140
81500,0rcu_preempt7684-21ssh00:00:470
81500,0rcu_preempt3-21ksoftirqd/022:40:110
81500,0rcu_preempt3-21ksoftirqd/022:07:120
81500,0rcu_preempt3-21ksoftirqd/022:07:120
81500,0rcu_preempt3-21ksoftirqd/021:59:100
81500,0rcu_preempt19-21ksoftirqd/122:47:451
81500,0rcu_preempt18573-21kworker/0:020:33:500
10050500,0irq/346-484840023656-1kworker/0:2H21:12:550
81490,0rcu_preempt3-21ksoftirqd/019:56:360
81490,0rcu_preempt19-21ksoftirqd/121:47:061
81490,0rcu_preempt19-21ksoftirqd/100:28:091
81490,0rcu_preempt15728-21kworker/0:023:19:550
10050490,0irq/346-48484009569-21munin-node0
10050490,0irq/346-48484003091-1kworker/0:2H23:24:310
10050490,0irq/346-48484000-21swapper/022:30:000
81480,0rcu_preempt9321-21kworker/u4:223:56:290
81480,0rcu_preempt3-21ksoftirqd/022:19:320
81480,0rcu_preempt3-21ksoftirqd/021:23:530
81480,0rcu_preempt3-21ksoftirqd/020:18:520
81480,0rcu_preempt3-21ksoftirqd/020:18:520
81480,0rcu_preempt3-21ksoftirqd/020:13:470
81480,0rcu_preempt19-21ksoftirqd/122:58:521
81480,0rcu_preempt11082-21aten_rapower_po22:58:360
10050480,0irq/346-48484000-21swapper/000:13:080
81470,0rcu_preempt3-21ksoftirqd/023:14:160
81470,0rcu_preempt3-21ksoftirqd/019:23:340
81470,0rcu_preempt3-21ksoftirqd/019:03:420
81470,0rcu_preempt19-21ksoftirqd/122:55:341
81470,0rcu_preempt19-21ksoftirqd/121:58:311
81470,0rcu_preempt19-21ksoftirqd/120:03:471
81470,0rcu_preempt19-21ksoftirqd/119:43:441
81470,0rcu_preempt19-21ksoftirqd/100:34:161
81470,0rcu_preempt19-21ksoftirqd/100:01:551
81460,0rcu_preempt3-21ksoftirqd/020:38:400
81460,0rcu_preempt19-21ksoftirqd/123:28:491
81460,0rcu_preempt19-21ksoftirqd/123:13:471
81460,0rcu_preempt19-21ksoftirqd/122:13:501
81460,0rcu_preempt19-21ksoftirqd/121:38:351
81460,0rcu_preempt19-21ksoftirqd/120:14:531
81460,0rcu_preempt19-21ksoftirqd/120:10:051
81460,0rcu_preempt19-21ksoftirqd/100:32:161
81460,0rcu_preempt19-21ksoftirqd/100:32:161
81460,0rcu_preempt15549-21ntpq21:23:481
10050460,0irq/346-48484006772-21munin-node0
10050460,0irq/346-484840027901-21ssh21:36:370
81450,0rcu_preempt3-21ksoftirqd/023:11:340
81450,0rcu_preempt3-21ksoftirqd/020:48:410
81450,0rcu_preempt3-21ksoftirqd/019:38:350
81450,0rcu_preempt32130-21diskmemload22:21:461
81450,0rcu_preempt19-21ksoftirqd/123:48:401
81450,0rcu_preempt19-21ksoftirqd/122:27:291
81450,0rcu_preempt19-21ksoftirqd/122:27:291
81450,0rcu_preempt19-21ksoftirqd/120:18:471
81450,0rcu_preempt19-21ksoftirqd/120:18:471
81450,0rcu_preempt19-21ksoftirqd/120:02:501
81450,0rcu_preempt19-21ksoftirqd/119:56:131
10050450,0irq/346-484840023656-1kworker/0:2H20:58:390
9950440,0irq/345-48484006799-1kworker/1:0H21:18:551
81440,0rcu_preempt3-21ksoftirqd/019:08:400
81440,0rcu_preempt32130-21diskmemload21:53:410
81440,0rcu_preempt30646-21apt-get21:03:350
81440,0rcu_preempt19-21ksoftirqd/123:18:481
81440,0rcu_preempt19-21ksoftirqd/123:03:441
81440,0rcu_preempt19-21ksoftirqd/121:52:341
81440,0rcu_preempt19-21ksoftirqd/119:23:461
81440,0rcu_preempt19-21ksoftirqd/119:18:591
81430,0rcu_preempt352-1kworker/1:0H23:56:361
81430,0rcu_preempt19-21ksoftirqd/122:48:371
81430,0rcu_preempt19-21ksoftirqd/122:42:521
81430,0rcu_preempt19-21ksoftirqd/121:28:511
81430,0rcu_preempt19-21ksoftirqd/120:37:511
81430,0rcu_preempt19-21ksoftirqd/120:23:331
81430,0rcu_preempt19-21ksoftirqd/100:22:221
81430,0rcu_preempt19-21ksoftirqd/100:14:341
81430,0rcu_preempt19-21ksoftirqd/100:14:341
81430,0rcu_preempt19-21ksoftirqd/100:09:031
81420,0rcu_preempt3-21ksoftirqd/019:15:270
81420,0rcu_preempt19-21ksoftirqd/123:44:261
81420,0rcu_preempt19-21ksoftirqd/123:23:421
81420,0rcu_preempt19-21ksoftirqd/121:33:491
81420,0rcu_preempt19-21ksoftirqd/120:39:521
81410,0rcu_preempt54-21kswapd020:57:081
81410,0rcu_preempt19-21ksoftirqd/119:48:291
81400,0rcu_preempt3-21ksoftirqd/020:53:390
81400,0rcu_preempt3-21ksoftirqd/020:28:360
81400,0rcu_preempt19-21ksoftirqd/123:41:391
81400,0rcu_preempt19-21ksoftirqd/123:09:141
81400,0rcu_preempt19-21ksoftirqd/122:32:321
81400,0rcu_preempt19-21ksoftirqd/122:08:551
81400,0rcu_preempt19-21ksoftirqd/121:53:351
81400,0rcu_preempt19-21ksoftirqd/119:03:341
81390,0rcu_preempt30234-1kworker/1:2H21:13:241
81390,0rcu_preempt19-21ksoftirqd/120:48:271
81390,0rcu_preempt19-21ksoftirqd/120:45:431
81390,0rcu_preempt19-21ksoftirqd/119:33:591
81390,0rcu_preempt19-21ksoftirqd/119:12:481
81380,0rcu_preempt19-21ksoftirqd/121:13:381
81380,0rcu_preempt19-21ksoftirqd/121:02:071
81380,0rcu_preempt19-21ksoftirqd/120:30:361
81380,0rcu_preempt19-21ksoftirqd/100:04:511
81380,0rcu_preempt11548-1kworker/1:1H22:07:471
81380,0rcu_preempt11548-1kworker/1:1H22:07:471
81370,0rcu_preempt19-21ksoftirqd/121:06:441
81360,0rcu_preempt19-21ksoftirqd/119:16:021
81330,0rcu_preempt19-21ksoftirqd/119:28:521
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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