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2026-06-22 - 15:41

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 Mon Jun 22, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81860,0rcu_preempt19-21ksoftirqd/110:16:021
81860,0rcu_preempt19-21ksoftirqd/110:16:021
10050820,0irq/346-484840054-21kswapd010:42:180
81810,0rcu_preempt27367-21kworker/1:212:12:521
81790,0rcu_preempt24783-21diskmemload11:07:451
81740,0rcu_preempt3-21ksoftirqd/010:56:440
81740,0rcu_preempt19-21ksoftirqd/110:42:481
81730,0rcu_preempt19-21ksoftirqd/112:01:341
81720,0rcu_preempt19-21ksoftirqd/111:17:061
81710,0rcu_preempt3-21ksoftirqd/012:13:060
81710,0rcu_preempt19-21ksoftirqd/109:17:531
81670,0rcu_preempt19-21ksoftirqd/112:30:321
81670,0rcu_preempt19-21ksoftirqd/110:17:351
81650,0rcu_preempt19-21ksoftirqd/111:24:061
81650,0rcu_preempt19-21ksoftirqd/109:59:431
81630,0rcu_preempt19-21ksoftirqd/111:39:381
81630,0rcu_preempt19-21ksoftirqd/109:55:571
81630,0rcu_preempt19-21ksoftirqd/109:55:571
81620,0rcu_preempt3-21ksoftirqd/011:07:350
81620,0rcu_preempt19-21ksoftirqd/109:34:491
81610,0rcu_preempt19-21ksoftirqd/111:48:241
81610,0rcu_preempt19-21ksoftirqd/111:46:381
10050590,0irq/346-48484000-21swapper/111:34:161
9950580,0irq/345-484840081rcu_preempt11:01:541
81570,0rcu_preempt3-21ksoftirqd/008:14:360
81570,0rcu_preempt19-21ksoftirqd/110:04:481
81570,0rcu_preempt19-21ksoftirqd/109:13:491
81560,0rcu_preempt19-21ksoftirqd/109:38:381
81550,0rcu_preempt3-21ksoftirqd/012:22:350
81550,0rcu_preempt3-21ksoftirqd/010:20:070
81550,0rcu_preempt19-21ksoftirqd/111:27:391
81550,0rcu_preempt19-21ksoftirqd/109:47:451
81550,0rcu_preempt19-21ksoftirqd/108:27:361
81540,0rcu_preempt8121-21grep10:27:541
81540,0rcu_preempt3-21ksoftirqd/012:02:400
81540,0rcu_preempt3-21ksoftirqd/011:47:470
81540,0rcu_preempt3-21ksoftirqd/010:32:490
81540,0rcu_preempt3-21ksoftirqd/009:52:330
81540,0rcu_preempt3-21ksoftirqd/009:52:330
81540,0rcu_preempt3-21ksoftirqd/008:32:350
81540,0rcu_preempt19-21ksoftirqd/109:32:171
10050540,0irq/346-48484001740-1kworker/0:1H10:57:270
9950530,0irq/345-48484003494-1kworker/1:1H12:34:571
81530,0rcu_preempt21070-21ping07:22:411
81530,0rcu_preempt1702-21kworker/0:208:01:290
10050530,0irq/346-484840019605-21apt-get10:07:350
10050530,0irq/346-484840019295-1kworker/0:3H10:48:390
9950520,0irq/345-48484009800-1kworker/1:2H09:27:171
9950520,0irq/345-48484008258-1kworker/1:3H12:08:111
9950520,0irq/345-484840021036-1kworker/1:1H12:20:161
81520,0rcu_preempt3-21ksoftirqd/012:10:220
81520,0rcu_preempt3-21ksoftirqd/010:12:510
81520,0rcu_preempt3-21ksoftirqd/010:12:510
81520,0rcu_preempt3-21ksoftirqd/007:52:410
81520,0rcu_preempt3-21ksoftirqd/007:52:410
81520,0rcu_preempt3-21ksoftirqd/007:42:250
10250520,0irq/333-mmc024783-21diskmemload11:02:411
10050520,0irq/346-48484000-21swapper/011:58:520
9950510,0irq/345-484840021036-1kworker/1:1H12:25:381
9950510,0irq/345-484840016520-1kworker/1:2H10:52:321
9950510,0irq/345-48484001256-1kworker/1:2H12:02:311
81510,0rcu_preempt3-21ksoftirqd/010:06:360
81510,0rcu_preempt19-21ksoftirqd/111:21:061
9950500,0irq/345-48484009363-1kworker/1:0H10:40:371
9950500,0irq/345-484840054-21kswapd012:18:240
9950500,0irq/345-48484004843-1kworker/0:0H09:19:160
81500,0rcu_preempt3-21ksoftirqd/009:57:500
81500,0rcu_preempt3-21ksoftirqd/009:25:200
81500,0rcu_preempt19-21ksoftirqd/108:22:541
81500,0rcu_preempt19-21ksoftirqd/108:17:501
81500,0rcu_preempt1702-21kworker/0:208:42:350
10050500,0irq/346-48484009799-1kworker/0:1H09:27:310
10050500,0irq/346-484840026455-1kworker/0:2H11:25:230
10050500,0irq/346-484840021537-1kworker/0:1H11:30:040
9950490,0irq/345-48484006045-1kworker/0:2H11:34:050
81490,0rcu_preempt3-21ksoftirqd/012:32:400
81490,0rcu_preempt3-21ksoftirqd/012:27:380
81490,0rcu_preempt3-21ksoftirqd/011:21:150
81490,0rcu_preempt27367-21kworker/1:210:26:281
81490,0rcu_preempt21652-21munin-node1
81490,0rcu_preempt19-21ksoftirqd/107:57:371
10050490,0irq/346-48484000-21swapper/009:35:430
9950480,0irq/345-484840029612-1kworker/1:2H09:47:211
9950480,0irq/345-484840029612-1kworker/1:2H09:47:211
9950480,0irq/345-48484000-21swapper/011:40:350
9950480,0irq/345-48484000-21swapper/007:22:470
81480,0rcu_preempt851-21rngd08:07:551
81480,0rcu_preempt3-21ksoftirqd/010:28:440
81480,0rcu_preempt3-21ksoftirqd/009:42:440
81480,0rcu_preempt3-21ksoftirqd/009:42:440
81480,0rcu_preempt3-21ksoftirqd/009:38:140
81480,0rcu_preempt3-21ksoftirqd/008:10:370
81480,0rcu_preempt3-21ksoftirqd/008:06:200
81480,0rcu_preempt3-21ksoftirqd/008:06:200
81480,0rcu_preempt3-21ksoftirqd/007:12:440
81480,0rcu_preempt3-21ksoftirqd/007:05:160
81480,0rcu_preempt28156-21kworker/0:209:13:410
81480,0rcu_preempt19-21ksoftirqd/108:02:541
81480,0rcu_preempt19-21ksoftirqd/108:02:541
9950470,0irq/345-48484000-21swapper/010:23:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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