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2025-11-14 - 07:58

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 Nov 14, 2025 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811500,0rcu_preempt20897-1kworker/0:0H19:46:400
811230,0rcu_preempt3-21ksoftirqd/022:01:580
811230,0rcu_preempt3-21ksoftirqd/021:36:340
81970,0rcu_preempt28518-1kworker/0:3H00:37:480
322502860,0sleep010050irq/346-484840020:01:130
256802830,0sleep09950irq/345-484840022:32:580
81800,0rcu_preempt19-21ksoftirqd/123:38:421
81800,0rcu_preempt19-21ksoftirqd/122:24:581
81770,0rcu_preempt19-21ksoftirqd/120:15:291
81760,0rcu_preempt19-21ksoftirqd/121:11:151
81750,0rcu_preempt19-21ksoftirqd/123:15:121
81750,0rcu_preempt19-21ksoftirqd/122:57:131
81750,0rcu_preempt19-21ksoftirqd/121:39:021
81740,0rcu_preempt14585-21cyclictest22:12:141
81730,0rcu_preempt1112-21kworker/1:023:21:561
13150720,0irq/301-480200027658-1kworker/1:0H23:59:591
81710,0rcu_preempt19-21ksoftirqd/121:55:511
81700,0rcu_preempt3-21ksoftirqd/023:09:430
81690,0rcu_preempt26322-21kworker/1:222:24:401
9950680,0irq/345-4848400171rcuc/123:40:161
10050680,0irq/346-4848400171rcuc/121:50:151
81670,0rcu_preempt5938-1kworker/1:0H23:31:131
81670,0rcu_preempt3-21ksoftirqd/022:10:160
81670,0rcu_preempt19-21ksoftirqd/121:23:451
81670,0rcu_preempt19-21ksoftirqd/100:21:271
10050670,0irq/346-484840054-21kswapd021:24:070
81660,0rcu_preempt751-21rngd00:33:350
81660,0rcu_preempt19-21ksoftirqd/122:03:401
66212660,0sleep010050irq/346-484840020:23:400
9950650,0irq/345-48484000-21swapper/022:59:530
81650,0rcu_preempt3-21ksoftirqd/023:57:500
81650,0rcu_preempt19-21ksoftirqd/123:48:041
81650,0rcu_preempt19-21ksoftirqd/122:41:421
81650,0rcu_preempt19-21ksoftirqd/121:27:101
81640,0rcu_preempt19-21ksoftirqd/123:52:091
81640,0rcu_preempt19-21ksoftirqd/122:17:441
9950630,0irq/345-4848400171rcuc/123:00:091
81630,0rcu_preempt19-21ksoftirqd/121:47:581
81630,0rcu_preempt19-21ksoftirqd/121:17:561
81630,0rcu_preempt19-21ksoftirqd/100:06:511
81620,0rcu_preempt3-21ksoftirqd/000:07:140
10050620,0irq/346-484840016658-1kworker/0:3H22:24:330
9950610,0irq/345-48484000-21swapper/021:49:540
81610,0rcu_preempt3-21ksoftirqd/023:30:290
81610,0rcu_preempt19-21ksoftirqd/100:28:541
81610,0rcu_preempt19-21ksoftirqd/100:28:541
10050610,0irq/346-484840025767-21ssh23:50:170
10050610,0irq/346-484840018552-1kworker/0:1H00:24:480
10050610,0irq/346-484840018552-1kworker/0:1H00:24:480
10050610,0irq/346-4848400171rcuc/121:42:271
9950600,0irq/345-4848400171rcuc/100:35:131
81600,0rcu_preempt3-21ksoftirqd/021:32:040
10050600,0irq/346-484840018490-1kworker/0:3H23:48:580
10050600,0irq/346-484840017888-1kworker/0:1H21:19:430
10050600,0irq/346-484840017041-1kworker/0:0H23:40:180
81590,0rcu_preempt3-21ksoftirqd/021:40:080
81590,0rcu_preempt29173-1kworker/1:0H22:39:071
10050590,0irq/346-484840015885-1kworker/0:3H19:15:080
81580,0rcu_preempt54-21kswapd021:13:180
81580,0rcu_preempt3-21ksoftirqd/000:18:310
10050580,0irq/346-48484004764-1kworker/0:0H20:17:060
10050580,0irq/346-4848400171rcuc/121:32:581
10050580,0irq/346-48484000-21swapper/021:25:430
9950570,0irq/345-484840015076-21munin-node0
81570,0rcu_preempt3-21ksoftirqd/023:29:030
81570,0rcu_preempt3-21ksoftirqd/022:58:470
81570,0rcu_preempt3-21ksoftirqd/022:41:290
81570,0rcu_preempt3-21ksoftirqd/022:07:130
81570,0rcu_preempt19-21ksoftirqd/119:45:091
9950560,0irq/345-484840018193-21latency_hist20:59:430
81560,0rcu_preempt19-21ksoftirqd/122:05:311
81560,0rcu_preempt19-21ksoftirqd/100:29:561
13150560,0irq/301-48020000-21swapper/020:05:020
10050560,0irq/346-48484007117-1kworker/0:0H20:25:140
10050560,0irq/346-48484004279-1kworker/0:1H22:15:550
10050560,0irq/346-484840032670-1kworker/0:0H22:45:120
10050560,0irq/346-484840029175-1kworker/1:2H23:05:151
10050550,0irq/346-484840018011-1kworker/0:0H23:05:090
10050550,0irq/346-4848400171rcuc/120:20:481
10050550,0irq/346-48484000-21swapper/021:45:010
9950540,0irq/345-48484000-21swapper/000:10:130
14590995411,0cyclictest23578-21ssh23:09:541
10050540,0irq/346-484840029144-21ssh23:15:360
10050540,0irq/346-4848400181ktimersoftd/122:44:591
9950530,0irq/345-484840032635-21latency_hist23:59:430
9950530,0irq/345-4848400171rcuc/120:55:091
9950530,0irq/345-48484000-21swapper/023:36:150
183712530,0sleep09950irq/345-484840000:22:050
10050530,0irq/346-48484005017-1kworker/0:2H22:49:550
10050530,0irq/346-48484002533-21runrttasks23:23:160
81520,0rcu_preempt32067-21ssh23:59:021
81520,0rcu_preempt2822-21kworker/1:019:20:291
81520,0rcu_preempt19-21ksoftirqd/122:29:481
10050520,0irq/346-484840028209-1kworker/0:1H22:38:370
81510,0rcu_preempt3-21ksoftirqd/021:59:220
81510,0rcu_preempt19-21ksoftirqd/100:11:171
9950500,0irq/345-484840019095-21sshd19:20:220
81500,0rcu_preempt3-21ksoftirqd/020:10:210
10050500,0irq/346-484840020897-1kworker/0:0H19:54:530
10050500,0irq/346-484840020897-1kworker/0:0H19:54:530
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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