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2026-06-26 - 06:08

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Fri Jun 26, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81780,0rcu_preempt17207-21kworker/0:320:21:270
81740,0rcu_preempt3-21ksoftirqd/019:53:470
81730,0rcu_preempt3-21ksoftirqd/023:35:220
81730,0rcu_preempt3-21ksoftirqd/023:35:220
81700,0rcu_preempt3-21ksoftirqd/022:12:360
81690,0rcu_preempt851-21rngd22:38:050
81690,0rcu_preempt3-21ksoftirqd/000:28:070
81690,0rcu_preempt3-21ksoftirqd/000:28:070
81670,0rcu_preempt3-21ksoftirqd/022:59:210
81670,0rcu_preempt3-21ksoftirqd/022:22:160
81670,0rcu_preempt3-21ksoftirqd/021:30:520
81610,0rcu_preempt19-21ksoftirqd/123:43:051
10050610,0irq/346-484840026233-1kworker/0:1H22:06:060
81600,0rcu_preempt3-21ksoftirqd/000:24:580
81600,0rcu_preempt19677-21kworker/0:119:02:310
10050580,0irq/346-484840032394-1kworker/0:1H23:50:590
81570,0rcu_preempt3-21ksoftirqd/023:31:140
81570,0rcu_preempt19-21ksoftirqd/121:36:251
81560,0rcu_preempt19-21ksoftirqd/121:52:431
81560,0rcu_preempt19-21ksoftirqd/121:37:331
81560,0rcu_preempt0-21swapper/122:13:561
10050560,0irq/346-48484008730-1kworker/1:1H22:23:551
10050560,0irq/346-484840030097-21runrttasks19:17:220
10050560,0irq/346-484840014050-1kworker/0:1H21:22:160
81550,0rcu_preempt3-21ksoftirqd/019:15:370
81540,0rcu_preempt7634-21kworker/1:123:05:411
81540,0rcu_preempt3-21ksoftirqd/000:00:500
10050540,0irq/346-48484008711-21sshd21:47:320
10050540,0irq/346-48484008711-21sshd21:47:320
10050540,0irq/346-4848400181ktimersoftd/100:10:361
10050540,0irq/346-484840017898-1kworker/0:2H22:33:040
9950530,0irq/345-484840021275-1kworker/0:2H22:01:230
81530,0rcu_preempt19-21ksoftirqd/123:22:471
81530,0rcu_preempt19-21ksoftirqd/120:57:371
10050530,0irq/346-48484008278-21ssh22:52:320
10050530,0irq/346-4848400181ktimersoftd/123:10:591
10050520,0irq/346-4848400336-1kworker/0:1H22:49:240
10050520,0irq/346-484840017898-1kworker/0:2H22:30:150
81510,0rcu_preempt19-21ksoftirqd/120:11:081
9950500,0irq/345-48484000-21swapper/020:57:310
81500,0rcu_preempt3-21ksoftirqd/020:25:320
81500,0rcu_preempt19-21ksoftirqd/121:47:471
81500,0rcu_preempt19-21ksoftirqd/121:47:471
81500,0rcu_preempt19-21ksoftirqd/100:22:331
81500,0rcu_preempt1470-21runrttasks21:57:321
10050500,0irq/346-48484004111-1kworker/0:3H21:10:250
10050500,0irq/346-484840031507-1kworker/0:1H21:42:050
10050500,0irq/346-484840018002-21ssh21:56:560
81490,0rcu_preempt3-21ksoftirqd/022:42:460
81490,0rcu_preempt19-21ksoftirqd/120:07:061
81490,0rcu_preempt18595-1kworker/1:0H20:22:381
81490,0rcu_preempt10303-21ping20:17:491
10050490,0irq/346-484840028867-21ssh00:17:530
9950480,0irq/345-484840054-21kswapd023:44:000
81480,0rcu_preempt7634-21kworker/1:123:12:341
81480,0rcu_preempt19-21ksoftirqd/123:57:211
81480,0rcu_preempt19-21ksoftirqd/120:12:411
81480,0rcu_preempt19-21ksoftirqd/119:47:341
81480,0rcu_preempt19-21ksoftirqd/119:31:041
81480,0rcu_preempt12945-21kworker/0:020:35:330
10050480,0irq/346-484840031713-21ssh22:10:260
10050480,0irq/346-48484002664-1kworker/0:2H23:23:170
10050480,0irq/346-48484001847-21users23:17:530
81470,0rcu_preempt3-21ksoftirqd/019:10:200
81470,0rcu_preempt19-21ksoftirqd/123:27:301
81470,0rcu_preempt19-21ksoftirqd/122:50:091
81470,0rcu_preempt19-21ksoftirqd/121:43:251
81470,0rcu_preempt19-21ksoftirqd/119:55:481
81470,0rcu_preempt19-21ksoftirqd/119:43:411
81470,0rcu_preempt19-21ksoftirqd/119:37:091
81470,0rcu_preempt19-21ksoftirqd/100:05:161
81470,0rcu_preempt1586-21grep23:17:501
10050470,0irq/346-484840014419-21ssh00:37:010
10050470,0irq/346-48484000-21swapper/000:07:580
9950460,0irq/345-48484000-21swapper/019:42:240
81460,0rcu_preempt54-21kswapd022:30:051
81460,0rcu_preempt3-21ksoftirqd/019:57:530
81460,0rcu_preempt19-21ksoftirqd/123:58:451
81460,0rcu_preempt19-21ksoftirqd/122:42:411
81460,0rcu_preempt19-21ksoftirqd/122:17:411
81460,0rcu_preempt19-21ksoftirqd/121:02:451
81460,0rcu_preempt19-21ksoftirqd/119:12:371
81460,0rcu_preempt19-21ksoftirqd/119:02:451
10050460,0irq/346-48484009902-1kworker/0:0H00:02:230
10050460,0irq/346-484840054-21kswapd021:22:441
10050460,0irq/346-48484004715-21if_eth219:37:450
10050460,0irq/346-484840015666-21/usr/sbin/munin22:27:200
81450,0rcu_preempt29958-21ssh00:19:201
81450,0rcu_preempt19-21ksoftirqd/122:57:311
81450,0rcu_preempt19-21ksoftirqd/122:37:311
81450,0rcu_preempt19-21ksoftirqd/122:02:471
81450,0rcu_preempt19-21ksoftirqd/121:20:561
81450,0rcu_preempt19-21ksoftirqd/120:47:291
81450,0rcu_preempt19-21ksoftirqd/119:57:421
81450,0rcu_preempt19-21ksoftirqd/119:26:421
10050450,0irq/346-484840022145-21munin-run20:32:200
10050450,0irq/346-484840019818-1kworker/0:3H00:17:190
9950440,0irq/345-484840026936-21meminfo21:32:430
81440,0rcu_preempt3-21ksoftirqd/020:37:320
81440,0rcu_preempt22028-21meminfo21:27:451
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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