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2026-08-29 - 08:10

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 Aug 29, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81800,0rcu_preempt17669-1kworker/0:2H22:24:560
10050800,0irq/346-484840054-21kswapd021:41:310
10050790,0irq/346-484840054-21kswapd022:09:580
10050790,0irq/346-484840054-21kswapd022:09:580
81780,0rcu_preempt836-21rngd00:09:510
10050770,0irq/346-484840054-21kswapd023:04:590
10050760,0irq/346-484840054-21kswapd022:07:550
10050750,0irq/346-484840054-21kswapd023:48:330
10050750,0irq/346-484840054-21kswapd000:32:370
10050750,0irq/346-484840054-21kswapd000:32:370
10050750,0irq/346-484840013773-1kworker/0:0H00:03:390
10050740,0irq/346-484840054-21kswapd023:13:020
10050730,0irq/346-484840054-21kswapd023:52:390
10050730,0irq/346-484840054-21kswapd022:54:570
10050730,0irq/346-484840027121-1kworker/0:2H23:37:280
10050730,0irq/346-484840022357-1kworker/0:2H23:00:230
10050720,0irq/346-48484007755-1kworker/0:0H22:19:030
10050720,0irq/346-48484006158-1kworker/0:4H00:26:050
10050720,0irq/346-484840018037-1kworker/0:3H21:22:190
10050720,0irq/346-484840013773-1kworker/0:0H23:56:310
81710,0rcu_preempt54-21kswapd021:04:520
10050710,0irq/346-4848400836-21rngd22:44:420
10050710,0irq/346-484840029831-1kworker/0:0H23:16:190
10050710,0irq/346-484840027969-1kworker/0:0H21:30:330
10050710,0irq/346-484840018037-1kworker/0:3H21:24:470
10050710,0irq/346-484840014984-1kworker/0:1H22:52:170
81700,0rcu_preempt3-21ksoftirqd/022:32:570
10050700,0irq/346-484840025326-1kworker/0:2H21:59:020
10050700,0irq/346-48484001936-1kworker/0:3H00:17:150
81690,0rcu_preempt3-21ksoftirqd/022:36:420
10050680,0irq/346-484840013092-1kworker/0:2H21:11:500
10050680,0irq/346-484840012711-1kworker/0:3H22:20:470
10050670,0irq/346-48484006158-1kworker/0:4H00:23:100
10050670,0irq/346-484840015396-1kworker/0:0H22:00:060
81650,0rcu_preempt3-21ksoftirqd/021:14:530
81640,0rcu_preempt5446-1kworker/0:1H21:36:590
10050630,0irq/346-484840024450-1kworker/0:2H00:07:210
81620,0rcu_preempt3-21ksoftirqd/023:19:510
81580,0rcu_preempt29113-21ntpq20:25:010
10050580,0irq/346-484840054-21kswapd000:34:500
81570,0rcu_preempt3-21ksoftirqd/019:14:510
81570,0rcu_preempt19902-21ping20:19:320
81570,0rcu_preempt19-21ksoftirqd/119:59:441
81560,0rcu_preempt3-21ksoftirqd/023:24:330
81550,0rcu_preempt3-21ksoftirqd/021:49:550
81550,0rcu_preempt3-21ksoftirqd/020:54:590
81550,0rcu_preempt19-21ksoftirqd/120:09:421
81540,0rcu_preempt3-21ksoftirqd/023:40:010
81540,0rcu_preempt3-21ksoftirqd/020:49:540
81540,0rcu_preempt3-21ksoftirqd/019:10:110
81540,0rcu_preempt19902-21ping20:04:590
9950530,0irq/345-484840020347-1kworker/1:1H22:19:501
81530,0rcu_preempt3-21ksoftirqd/022:43:540
81530,0rcu_preempt3-21ksoftirqd/020:39:430
81530,0rcu_preempt3-21ksoftirqd/020:29:580
81530,0rcu_preempt3-21ksoftirqd/020:19:590
81520,0rcu_preempt3-21ksoftirqd/020:59:540
81520,0rcu_preempt3-21ksoftirqd/019:54:590
81520,0rcu_preempt0-21swapper/021:47:410
3686995211,0cyclictest22185-1kworker/0:0H23:33:010
10050520,0irq/346-484840054-21kswapd021:14:161
81510,0rcu_preempt3-21ksoftirqd/020:09:580
10050510,0irq/346-484840032526-1kworker/1:1H22:39:331
81500,0rcu_preempt3-21ksoftirqd/020:00:010
10050500,0irq/346-484840015313-21munin-node1
9950490,0irq/345-484840029384-1kworker/1:2H00:15:511
81490,0rcu_preempt3-21ksoftirqd/020:34:560
81490,0rcu_preempt3-21ksoftirqd/019:49:520
81490,0rcu_preempt19-21ksoftirqd/120:25:061
10050490,0irq/346-484840054-21kswapd023:16:111
10050490,0irq/346-484840011798-21runrttasks00:26:421
81480,0rcu_preempt3-21ksoftirqd/020:44:580
81480,0rcu_preempt3-21ksoftirqd/019:34:530
81480,0rcu_preempt3-21ksoftirqd/019:34:530
81480,0rcu_preempt24886-1kworker/1:1H23:39:571
81480,0rcu_preempt19-21ksoftirqd/123:33:131
10050480,0irq/346-48484004631-1kworker/1:0H23:48:281
10050480,0irq/346-484840012360-21awk22:49:321
81470,0rcu_preempt3-21ksoftirqd/019:04:470
81460,0rcu_preempt9116-21kworker/0:019:24:590
81460,0rcu_preempt19-21ksoftirqd/122:34:421
3686994612,0cyclictest14923-1kworker/0:2H19:44:510
10050460,0irq/346-48484008613-21ssh00:23:591
10050460,0irq/346-48484000-21swapper/121:55:511
81450,0rcu_preempt25329-1kworker/1:3H21:59:351
81450,0rcu_preempt19-21ksoftirqd/122:59:471
81450,0rcu_preempt19-21ksoftirqd/119:19:471
81440,0rcu_preempt9116-21kworker/0:019:40:010
81440,0rcu_preempt3780-21kworker/1:021:24:561
81440,0rcu_preempt19-21ksoftirqd/121:32:291
81440,0rcu_preempt19-21ksoftirqd/121:16:091
81440,0rcu_preempt19-21ksoftirqd/119:39:491
81440,0rcu_preempt19-21ksoftirqd/119:34:471
81440,0rcu_preempt19-21ksoftirqd/119:34:471
81440,0rcu_preempt19-21ksoftirqd/119:29:511
81440,0rcu_preempt19-21ksoftirqd/119:18:551
81440,0rcu_preempt19-21ksoftirqd/119:04:561
10050440,0irq/346-484840017832-21cron21:49:321
81430,0rcu_preempt54-21kswapd019:24:150
81430,0rcu_preempt3685-21cyclictest20:14:541
81430,0rcu_preempt3685-21cyclictest20:09:321
81430,0rcu_preempt19-21ksoftirqd/123:36:061
81430,0rcu_preempt19-21ksoftirqd/121:39:411
81430,0rcu_preempt19-21ksoftirqd/119:25:011
81430,0rcu_preempt19-21ksoftirqd/100:30:551
81430,0rcu_preempt19-21ksoftirqd/100:30:551
81430,0rcu_preempt19-21ksoftirqd/100:09:531
81430,0rcu_preempt19-21ksoftirqd/100:03:271
10050430,0irq/346-4848400836-21rngd22:28:141
10050430,0irq/346-484840011470-21dropbear19:30:100
81420,0rcu_preempt19-21ksoftirqd/123:05:001
81420,0rcu_preempt19-21ksoftirqd/122:09:421
81420,0rcu_preempt19-21ksoftirqd/122:09:421
81420,0rcu_preempt19-21ksoftirqd/122:09:001
81420,0rcu_preempt19-21ksoftirqd/121:37:451
81420,0rcu_preempt19-21ksoftirqd/120:54:431
81410,0rcu_preempt3685-21cyclictest00:06:341
81410,0rcu_preempt19-21ksoftirqd/123:49:481
81410,0rcu_preempt19-21ksoftirqd/123:27:001
81410,0rcu_preempt19-21ksoftirqd/122:54:581
81410,0rcu_preempt19-21ksoftirqd/122:52:491
81410,0rcu_preempt19-21ksoftirqd/122:29:431
81410,0rcu_preempt19-21ksoftirqd/120:19:441
81410,0rcu_preempt19-21ksoftirqd/119:49:421
9950400,0irq/345-48484000-21swapper/120:39:341
81400,0rcu_preempt19-21ksoftirqd/123:54:491
81400,0rcu_preempt19-21ksoftirqd/123:09:561
81400,0rcu_preempt19-21ksoftirqd/122:14:381
81400,0rcu_preempt19-21ksoftirqd/121:49:501
81400,0rcu_preempt19-21ksoftirqd/121:19:551
81400,0rcu_preempt19-21ksoftirqd/120:34:421
81400,0rcu_preempt19-21ksoftirqd/119:54:491
81390,0rcu_preempt19-21ksoftirqd/123:19:441
81390,0rcu_preempt19-21ksoftirqd/100:34:331
81380,0rcu_preempt19-21ksoftirqd/121:04:581
81380,0rcu_preempt19-21ksoftirqd/121:00:321
81380,0rcu_preempt19-21ksoftirqd/120:49:441
81380,0rcu_preempt19-21ksoftirqd/120:30:251
81350,0rcu_preempt19-21ksoftirqd/120:44:321
81350,0rcu_preempt19-21ksoftirqd/119:10:061
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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