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2026-06-10 - 05:44

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 Wed Jun 10, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10050810,0irq/346-484840025540-1kworker/0:2H21:58:220
81720,0rcu_preempt3-21ksoftirqd/000:32:540
81720,0rcu_preempt3-21ksoftirqd/000:32:540
10050710,0irq/346-48484000-21swapper/000:18:170
81700,0rcu_preempt3-21ksoftirqd/022:28:060
81680,0rcu_preempt3-21ksoftirqd/023:12:340
81670,0rcu_preempt19-21ksoftirqd/123:26:381
81660,0rcu_preempt3-21ksoftirqd/022:07:590
10050650,0irq/346-48484000-21swapper/022:21:250
10050640,0irq/346-48484000-21swapper/021:50:220
81630,0rcu_preempt19-21ksoftirqd/122:19:171
81630,0rcu_preempt19-21ksoftirqd/122:04:221
81630,0rcu_preempt19-21ksoftirqd/119:43:201
10050630,0irq/346-4848400745-1kworker/1:1H00:23:581
10050630,0irq/346-484840024556-1kworker/1:3H23:02:371
10050630,0irq/346-484840016627-1kworker/1:1H23:28:591
10050630,0irq/346-48484000-21swapper/023:30:440
10050620,0irq/346-484840022651-1kworker/1:2H00:09:471
10050620,0irq/346-484840018822-1kworker/1:0H21:24:151
10050620,0irq/346-484840017742-1kworker/1:1H00:00:341
10050620,0irq/346-484840014758-1kworker/1:1H00:31:481
10050610,0irq/346-484840030458-1kworker/1:1H22:01:001
81600,0rcu_preempt3-21ksoftirqd/022:46:000
10050600,0irq/346-484840054-21kswapd021:02:540
10050600,0irq/346-484840019609-1kworker/1:1H22:55:421
10050600,0irq/346-484840016627-1kworker/1:1H23:33:181
10050600,0irq/346-48484000-21swapper/021:36:160
81590,0rcu_preempt30011-21kworker/0:119:52:470
81590,0rcu_preempt30011-21kworker/0:119:52:470
81590,0rcu_preempt19-21ksoftirqd/123:44:101
81590,0rcu_preempt19-21ksoftirqd/123:44:101
81590,0rcu_preempt19-21ksoftirqd/120:32:541
10050590,0irq/346-484840054-21kswapd023:38:251
10050590,0irq/346-48484004901-1kworker/1:2H22:40:401
10050590,0irq/346-484840028304-1kworker/1:0H00:14:561
10050590,0irq/346-484840023740-1kworker/1:1H21:29:241
10050590,0irq/346-484840023411-1kworker/1:3H00:05:331
10050590,0irq/346-48484001047-1kworker/0:0H21:54:200
81580,0rcu_preempt19-21ksoftirqd/121:48:391
10050580,0irq/346-4848400745-1kworker/1:1H00:20:031
10050580,0irq/346-484840054-21kswapd021:42:471
10050580,0irq/346-484840019652-1kworker/1:2H00:34:231
10050580,0irq/346-484840019652-1kworker/1:2H00:34:231
81570,0rcu_preempt3-21ksoftirqd/023:52:540
81570,0rcu_preempt3-21ksoftirqd/022:24:390
10050570,0irq/346-484840014719-1kworker/0:0H22:53:080
10050570,0irq/346-484840013916-1kworker/1:1H21:10:111
10050570,0irq/346-484840011742-1kworker/1:0H23:21:251
81560,0rcu_preempt12834-21munin-node1
10050560,0irq/346-484840029419-1kworker/0:3H23:06:190
10050560,0irq/346-484840018822-1kworker/1:0H21:14:391
81550,0rcu_preempt3-21ksoftirqd/020:07:370
81550,0rcu_preempt19-21ksoftirqd/121:32:581
81550,0rcu_preempt19-21ksoftirqd/119:07:491
10050550,0irq/346-484840054-21kswapd021:07:590
10050550,0irq/346-484840054-21kswapd000:31:120
10050550,0irq/346-484840027515-1kworker/1:2H22:30:321
10050550,0irq/346-484840015752-1kworker/1:0H21:54:081
10050550,0irq/346-484840014718-1kworker/1:2H22:50:481
9950540,0irq/345-4848400181ktimersoftd/121:40:241
81540,0rcu_preempt4425-21apt-get19:07:450
81540,0rcu_preempt19-21ksoftirqd/122:25:181
81540,0rcu_preempt19-21ksoftirqd/119:23:011
10050540,0irq/346-4848400851-21rngd22:50:080
10050540,0irq/346-484840054-21kswapd023:01:181
10050540,0irq/346-48484001880-1kworker/0:0H23:12:380
81530,0rcu_preempt3-21ksoftirqd/020:57:480
81530,0rcu_preempt3-21ksoftirqd/020:57:480
10050530,0irq/346-48484006800-1kworker/1:3H23:17:121
10050530,0irq/346-484840032442-1kworker/1:1H22:44:101
10050530,0irq/346-484840027515-1kworker/1:2H22:33:391
10050530,0irq/346-484840018822-1kworker/1:0H21:21:201
10050530,0irq/346-484840018822-1kworker/1:0H21:21:201
10050530,0irq/346-484840012765-1kworker/1:1H22:15:251
9950520,0irq/345-484840024556-1kworker/1:3H23:07:481
81520,0rcu_preempt3-21ksoftirqd/023:48:060
81520,0rcu_preempt3-21ksoftirqd/000:05:130
81520,0rcu_preempt19-21ksoftirqd/123:47:491
81520,0rcu_preempt19-21ksoftirqd/119:42:241
81520,0rcu_preempt11279-21diskmemload21:40:560
10050520,0irq/346-48484000-21swapper/023:57:490
81510,0rcu_preempt3-21ksoftirqd/022:57:480
81510,0rcu_preempt3-21ksoftirqd/021:42:500
81510,0rcu_preempt3-21ksoftirqd/020:23:030
81510,0rcu_preempt3-21ksoftirqd/000:13:000
81510,0rcu_preempt19-21ksoftirqd/120:23:031
81510,0rcu_preempt0-21swapper/121:03:001
10050510,0irq/346-48484007863-1kworker/1:0H22:10:101
10050510,0irq/346-484840054-21kswapd023:20:280
10050510,0irq/346-4848400318852sleep022:34:040
10050510,0irq/346-484840025656-1kworker/0:1H23:38:220
81500,0rcu_preempt5640-21ssh22:40:480
81500,0rcu_preempt3-21ksoftirqd/020:46:580
81500,0rcu_preempt3-21ksoftirqd/019:02:580
81500,0rcu_preempt31329-21munin-node0
81500,0rcu_preempt23587-21kworker/0:121:20:260
81500,0rcu_preempt23587-21kworker/0:121:20:260
81500,0rcu_preempt19-21ksoftirqd/119:58:021
10050500,0irq/346-484840054-21kswapd000:24:510
10050500,0irq/346-484840014010-21apt-get23:22:470
10050500,0irq/346-48484001047-1kworker/0:0H21:31:120
10050500,0irq/346-48484000-21swapper/023:46:070
10050500,0irq/346-48484000-21swapper/023:46:070
81490,0rcu_preempt3-21ksoftirqd/023:32:560
81490,0rcu_preempt3-21ksoftirqd/020:52:580
81490,0rcu_preempt3-21ksoftirqd/020:13:060
81490,0rcu_preempt3-21ksoftirqd/020:03:000
81490,0rcu_preempt23587-21kworker/0:122:13:320
81490,0rcu_preempt20325-21ping20:17:551
10050490,0irq/346-484840054-21kswapd022:05:260
10050490,0irq/346-484840054-21kswapd021:16:510
10050490,0irq/346-484840054-21kswapd000:11:530
81480,0rcu_preempt3-21ksoftirqd/020:32:580
81480,0rcu_preempt3-21ksoftirqd/019:58:080
81480,0rcu_preempt3-21ksoftirqd/019:47:510
81480,0rcu_preempt20325-21ping20:18:050
81480,0rcu_preempt19-21ksoftirqd/119:19:341
10050480,0irq/346-484840054-21kswapd021:26:090
81470,0rcu_preempt19-21ksoftirqd/119:27:571
81460,0rcu_preempt19-21ksoftirqd/120:37:551
81460,0rcu_preempt19-21ksoftirqd/120:07:561
81460,0rcu_preempt19-21ksoftirqd/119:52:521
81460,0rcu_preempt19-21ksoftirqd/119:52:521
81460,0rcu_preempt19-21ksoftirqd/119:12:531
81450,0rcu_preempt3-21ksoftirqd/019:12:520
81450,0rcu_preempt30687-21apt-get20:27:471
10050450,0irq/346-48484000-21swapper/120:04:041
81440,0rcu_preempt3-21ksoftirqd/020:47:570
81440,0rcu_preempt19-21ksoftirqd/120:52:591
81440,0rcu_preempt19-21ksoftirqd/120:47:471
81440,0rcu_preempt18218-21ntp_states19:47:591
10050440,0irq/346-484840014772-21irqstats19:38:020
10050440,0irq/346-48484000-21swapper/123:53:571
81430,0rcu_preempt19-21ksoftirqd/120:12:551
81420,0rcu_preempt3-21ksoftirqd/020:39:070
428199421,0cyclictest7566-21ping19:27:530
81410,0rcu_preempt3-21ksoftirqd/019:45:100
428199412,0cyclictest0-21swapper/019:22:500
81400,0rcu_preempt26591-21kworker/1:020:57:531
81400,0rcu_preempt26591-21kworker/1:020:57:531
81390,0rcu_preempt19-21ksoftirqd/120:42:531
81390,0rcu_preempt1426-21munin-node19:02:531
81380,0rcu_preempt3-21ksoftirqd/019:17:540
10050370,0irq/346-484840012892-21wget19:32:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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