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2026-03-13 - 13:32

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 Fri Mar 13, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81920,0rcu_preempt3-21ksoftirqd/021:59:300
81870,0rcu_preempt27600-1kworker/0:2H19:44:290
81810,0rcu_preempt3-21ksoftirqd/021:49:220
81770,0rcu_preempt2360-21diskstats20:04:190
81740,0rcu_preempt9602-21kworker/0:222:33:540
81740,0rcu_preempt3-21ksoftirqd/021:12:360
81720,0rcu_preempt3-21ksoftirqd/022:47:200
81720,0rcu_preempt3-21ksoftirqd/021:04:240
81720,0rcu_preempt3-21ksoftirqd/021:04:240
81710,0rcu_preempt3-21ksoftirqd/022:22:030
81680,0rcu_preempt3-21ksoftirqd/000:24:310
81670,0rcu_preempt3-21ksoftirqd/021:36:400
81660,0rcu_preempt3-21ksoftirqd/022:06:560
81650,0rcu_preempt3-21ksoftirqd/022:40:570
81640,0rcu_preempt3-21ksoftirqd/021:33:350
81620,0rcu_preempt3-21ksoftirqd/023:04:040
81620,0rcu_preempt3-21ksoftirqd/022:14:280
81620,0rcu_preempt3-21ksoftirqd/021:39:290
81620,0rcu_preempt3-21ksoftirqd/000:09:020
10050620,0irq/346-484840030260-1kworker/1:3H22:25:381
10050610,0irq/346-484840012715-1kworker/1:0H22:36:311
10050610,0irq/346-484840012715-1kworker/1:0H22:36:311
10050600,0irq/346-48484005160-1kworker/1:0H23:01:191
10050600,0irq/346-484840027608-1kworker/1:3H22:54:071
10050600,0irq/346-484840022281-1kworker/1:0H23:53:311
10050600,0irq/346-484840018088-1kworker/1:0H21:15:341
10050600,0irq/346-484840018088-1kworker/1:0H21:15:341
9950590,0irq/345-48484000-21swapper/123:09:121
10050590,0irq/346-48484007422-1kworker/0:2H23:48:070
10050590,0irq/346-48484007422-1kworker/0:2H00:15:440
10050590,0irq/346-484840054-21kswapd022:40:171
10050590,0irq/346-484840027240-1kworker/0:3H23:57:400
10050590,0irq/346-484840023085-1kworker/1:0H21:44:101
10050590,0irq/346-484840022655-1kworker/1:2H22:47:111
10050590,0irq/346-484840017342-1kworker/1:2H23:46:151
10050590,0irq/346-484840013133-1kworker/1:2H21:35:091
81580,0rcu_preempt19-21ksoftirqd/120:15:551
81580,0rcu_preempt19-21ksoftirqd/120:15:551
81580,0rcu_preempt19-21ksoftirqd/120:13:001
81580,0rcu_preempt19-21ksoftirqd/120:03:421
81580,0rcu_preempt19-21ksoftirqd/120:03:421
10050580,0irq/346-484840019994-1kworker/1:1H23:17:181
81570,0rcu_preempt3-21ksoftirqd/023:43:150
81570,0rcu_preempt19-21ksoftirqd/120:25:561
81570,0rcu_preempt19-21ksoftirqd/120:20:551
81570,0rcu_preempt19-21ksoftirqd/119:56:021
10050570,0irq/346-48484008472-1kworker/0:1H23:09:510
10050570,0irq/346-48484007421-1kworker/1:0H23:37:381
10050570,0irq/346-484840054-21kswapd000:05:201
10050570,0irq/346-484840029583-1kworker/1:0H00:32:001
10050570,0irq/346-484840012373-1kworker/1:1H23:42:161
10050570,0irq/346-48484000-21swapper/021:17:350
10050570,0irq/346-48484000-21swapper/021:17:350
81560,0rcu_preempt3-21ksoftirqd/020:09:160
81560,0rcu_preempt19-21ksoftirqd/120:06:051
10050560,0irq/346-484840025766-1kworker/1:1H21:13:251
10050560,0irq/346-484840023085-1kworker/1:0H21:43:091
81550,0rcu_preempt3-21ksoftirqd/020:49:120
81550,0rcu_preempt3-21ksoftirqd/019:34:020
81550,0rcu_preempt19-21ksoftirqd/120:34:171
10050550,0irq/346-484840054-21kswapd022:21:311
10050550,0irq/346-484840054-21kswapd021:56:161
10050540,0irq/346-4848400851-21rngd23:34:210
10050540,0irq/346-484840054-21kswapd021:28:330
10050540,0irq/346-484840054-21kswapd021:28:330
10050540,0irq/346-484840054-21kswapd000:27:121
10050540,0irq/346-4848400484-1kworker/1:3H21:51:471
10050540,0irq/346-48484002123-1kworker/1:2H00:38:411
10050540,0irq/346-484840015372-1kworker/1:3H22:06:581
81530,0rcu_preempt3-21ksoftirqd/000:19:220
81530,0rcu_preempt23348-21diskmemload22:09:120
10050530,0irq/346-484840054-21kswapd022:36:110
10050530,0irq/346-484840054-21kswapd022:36:110
10050530,0irq/346-484840054-21kswapd021:44:590
10050530,0irq/346-484840054-21kswapd021:22:021
10050530,0irq/346-484840029923-1kworker/0:0H23:28:270
10050530,0irq/346-48484002811-1kworker/1:1H22:30:541
10050530,0irq/346-484840024973-1kworker/1:2H23:21:401
10050530,0irq/346-484840014446-1kworker/0:3H19:06:220
10050520,0irq/346-484840054-21kswapd022:50:041
10050520,0irq/346-484840032570-1kworker/1:1H23:07:151
10050520,0irq/346-484840030515-1kworker/0:1H22:58:250
10050520,0irq/346-484840014654-1kworker/1:2H00:17:491
81510,0rcu_preempt23348-21diskmemload23:19:310
10050510,0irq/346-484840054-21kswapd023:03:100
10050510,0irq/346-484840054-21kswapd021:31:081
81500,0rcu_preempt19-21ksoftirqd/119:39:031
81500,0rcu_preempt19-21ksoftirqd/119:24:381
81500,0rcu_preempt19-21ksoftirqd/119:24:381
10050500,0irq/346-48484009478-21ssh21:59:351
10050500,0irq/346-484840054-21kswapd000:36:290
10050500,0irq/346-484840054-21kswapd000:33:390
10050500,0irq/346-48484000-21swapper/000:02:260
81490,0rcu_preempt3-21ksoftirqd/022:24:320
81490,0rcu_preempt3-21ksoftirqd/021:54:220
10050490,0irq/346-484840054-21kswapd023:55:111
10050490,0irq/346-484840054-21kswapd021:22:370
10050490,0irq/346-484840031945-21ssh00:00:491
10050490,0irq/346-484840020183-21ssh22:10:401
10050490,0irq/346-48484001768-21ssh23:30:091
81480,0rcu_preempt3-21ksoftirqd/023:30:250
81480,0rcu_preempt23348-21diskmemload22:49:200
10050480,0irq/346-48484008168-1kworker/1:1H21:25:511
10050480,0irq/346-48484008168-1kworker/1:1H21:25:511
10050480,0irq/346-484840054-21kswapd023:52:410
10050480,0irq/346-484840021529-21ssh00:23:411
10050480,0irq/346-484840019995-1kworker/0:1H23:16:150
81470,0rcu_preempt8227-1kworker/0:0H20:24:130
81470,0rcu_preempt19-21ksoftirqd/119:29:271
4350470,0irq/32-433000000-21swapper/019:49:140
10050470,0irq/346-484840030486-21ssh23:26:471
10050470,0irq/346-484840011346-21ssh00:13:210
9950460,0irq/345-48484000-21swapper/119:39:011
81460,0rcu_preempt19-21ksoftirqd/100:09:131
81450,0rcu_preempt32401-21ping20:19:330
10050450,0irq/346-484840020326-1kworker/1:1H22:14:531
81440,0rcu_preempt3-21ksoftirqd/020:59:150
81440,0rcu_preempt19-21ksoftirqd/120:54:291
81440,0rcu_preempt19-21ksoftirqd/119:19:101
81440,0rcu_preempt19-21ksoftirqd/119:14:181
10050440,0irq/346-48484000-21swapper/019:59:010
81430,0rcu_preempt3-21ksoftirqd/020:39:190
81430,0rcu_preempt3-21ksoftirqd/020:14:250
81430,0rcu_preempt3-21ksoftirqd/020:14:250
81430,0rcu_preempt12010-21aten_rapower_cu20:34:150
10050430,0irq/346-48484000-21swapper/119:09:181
81420,0rcu_preempt19-21ksoftirqd/119:44:341
81420,0rcu_preempt15479-21df_inode20:44:160
81420,0rcu_preempt14634-21kworker/0:019:14:240
10050420,0irq/346-484840017363-21ls19:09:260
81410,0rcu_preempt3-21ksoftirqd/020:54:270
10050410,0irq/346-484840024315-1kworker/0:2H19:34:220
81400,0rcu_preempt3-21ksoftirqd/019:24:280
81400,0rcu_preempt3-21ksoftirqd/019:24:280
81400,0rcu_preempt19-21ksoftirqd/120:41:231
16369994014,0cyclictest0-21swapper/020:03:290
16369994014,0cyclictest0-21swapper/020:03:290
10050400,0irq/346-48484000-21swapper/019:41:390
81390,0rcu_preempt19-21ksoftirqd/121:04:241
81390,0rcu_preempt19-21ksoftirqd/121:04:241
81390,0rcu_preempt19-21ksoftirqd/120:44:181
81390,0rcu_preempt19-21ksoftirqd/119:49:261
81390,0rcu_preempt0-21swapper/020:29:280
81380,0rcu_preempt19-21ksoftirqd/120:59:141
81380,0rcu_preempt19-21ksoftirqd/120:32:221
81380,0rcu_preempt19-21ksoftirqd/119:06:211
9950370,0irq/345-484840020084-21sshd19:19:220
81360,0rcu_preempt0-21swapper/120:49:271
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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