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2026-06-28 - 09:08

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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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 Sun Jun 28, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81980,0rcu_preempt54-21kswapd021:02:421
81950,0rcu_preempt19-21ksoftirqd/122:43:061
81930,0rcu_preempt19-21ksoftirqd/122:57:421
81900,0rcu_preempt54-21kswapd021:16:211
81880,0rcu_preempt19-21ksoftirqd/100:02:191
81870,0rcu_preempt19-21ksoftirqd/122:07:411
81780,0rcu_preempt3-21ksoftirqd/023:39:580
81780,0rcu_preempt3-21ksoftirqd/023:39:580
81760,0rcu_preempt3-21ksoftirqd/000:32:170
81750,0rcu_preempt3-21ksoftirqd/021:26:370
81750,0rcu_preempt3-21ksoftirqd/000:23:050
81750,0rcu_preempt3-21ksoftirqd/000:23:050
81740,0rcu_preempt3-21ksoftirqd/022:40:070
81740,0rcu_preempt19-21ksoftirqd/123:33:461
81740,0rcu_preempt19-21ksoftirqd/123:09:491
81730,0rcu_preempt19-21ksoftirqd/122:12:331
81710,0rcu_preempt3134-1kworker/0:2H23:02:510
81700,0rcu_preempt19-21ksoftirqd/100:20:511
10050690,0irq/346-48484008565-1kworker/0:2H22:09:010
10050690,0irq/346-484840019-21ksoftirqd/121:45:381
81680,0rcu_preempt19-21ksoftirqd/122:27:431
81670,0rcu_preempt3-21ksoftirqd/023:17:590
9950660,0irq/345-484840015201-1kworker/1:2H23:46:001
81660,0rcu_preempt19-21ksoftirqd/100:22:311
81660,0rcu_preempt19-21ksoftirqd/100:22:311
81660,0rcu_preempt0-21swapper/123:04:181
10050660,0irq/346-484840020681-1kworker/0:1H22:47:500
9950640,0irq/345-484840019-21ksoftirqd/122:52:331
81640,0rcu_preempt19-21ksoftirqd/121:19:451
81630,0rcu_preempt10728-1kworker/0:1H22:36:390
81630,0rcu_preempt10728-1kworker/0:1H22:36:390
81610,0rcu_preempt19-21ksoftirqd/122:25:421
10050610,0irq/346-484840017833-21ssh23:14:231
9950600,0irq/345-4848400181ktimersoftd/122:38:261
9950600,0irq/345-4848400171rcuc/121:26:501
81590,0rcu_preempt3-21ksoftirqd/023:52:420
81590,0rcu_preempt3-21ksoftirqd/019:57:330
81590,0rcu_preempt19-21ksoftirqd/100:29:011
10050590,0irq/346-484840081rcu_preempt00:36:381
81580,0rcu_preempt19-21ksoftirqd/121:52:301
81580,0rcu_preempt19-21ksoftirqd/121:34:291
81580,0rcu_preempt0-21swapper/121:50:471
14328995811,0cyclictest0-21swapper/020:02:400
10050580,0irq/346-4848400181ktimersoftd/119:12:371
10050580,0irq/346-4848400181ktimersoftd/119:12:371
9950570,0irq/345-4848400171rcuc/123:50:371
9950570,0irq/345-4848400171rcuc/123:20:291
9950570,0irq/345-484840012810-1kworker/0:0H21:08:190
81570,0rcu_preempt3-21ksoftirqd/023:57:480
81570,0rcu_preempt19-21ksoftirqd/100:09:461
10050570,0irq/346-484840020649-1kworker/0:1H22:13:120
9950560,0irq/345-4848400181ktimersoftd/122:02:391
9950560,0irq/345-4848400171rcuc/123:38:071
9950560,0irq/345-4848400171rcuc/123:38:071
81560,0rcu_preempt3-21ksoftirqd/023:07:300
10050560,0irq/346-4848400181ktimersoftd/122:19:441
81550,0rcu_preempt3-21ksoftirqd/023:22:370
81550,0rcu_preempt3-21ksoftirqd/021:47:360
81550,0rcu_preempt0-21swapper/122:01:571
10050550,0irq/346-484840023125-21meminfo23:52:401
10050550,0irq/346-484840020715-21ssh21:38:411
9950540,0irq/345-4848400171rcuc/122:47:371
9950540,0irq/345-4848400171rcuc/100:02:361
9950540,0irq/345-48484000-21swapper/021:59:000
81540,0rcu_preempt3-21ksoftirqd/023:33:140
81540,0rcu_preempt19-21ksoftirqd/121:31:121
81540,0rcu_preempt19-21ksoftirqd/120:21:101
81540,0rcu_preempt19-21ksoftirqd/120:15:061
81540,0rcu_preempt19-21ksoftirqd/120:15:061
81540,0rcu_preempt1049-21avahi-daemon19:44:381
10050540,0irq/346-484840013596-21munin-node0
9950530,0irq/345-4848400111rcuc/021:46:530
81530,0rcu_preempt3-21ksoftirqd/022:57:300
81530,0rcu_preempt3-21ksoftirqd/022:22:470
81530,0rcu_preempt3-21ksoftirqd/019:07:300
81530,0rcu_preempt19-21ksoftirqd/123:22:531
10050530,0irq/346-484840013511-1kworker/0:0H22:17:470
81520,0rcu_preempt54-21kswapd022:34:261
81520,0rcu_preempt54-21kswapd022:34:261
81520,0rcu_preempt3-21ksoftirqd/021:52:380
81520,0rcu_preempt3-21ksoftirqd/021:37:460
10050520,0irq/346-48484001804-1kworker/0:1H00:06:330
9950510,0irq/345-484840010689-21proc_pri20:32:420
81510,0rcu_preempt3-21ksoftirqd/000:07:370
81510,0rcu_preempt1317-21chrt23:30:520
10050510,0irq/346-484840054-21kswapd023:27:311
10050510,0irq/346-484840015722-1kworker/0:0H22:42:400
10050510,0irq/346-48484001376-1kworker/0:1H21:37:150
81500,0rcu_preempt3-21ksoftirqd/023:12:500
81500,0rcu_preempt3-21ksoftirqd/020:57:430
81500,0rcu_preempt3-21ksoftirqd/020:39:260
81500,0rcu_preempt3-21ksoftirqd/020:21:010
81500,0rcu_preempt3-21ksoftirqd/020:12:460
81500,0rcu_preempt3-21ksoftirqd/020:12:460
81500,0rcu_preempt3-21ksoftirqd/000:17:470
81500,0rcu_preempt3-21ksoftirqd/000:12:470
81500,0rcu_preempt19-21ksoftirqd/120:07:351
81500,0rcu_preempt14127-21php-cgi22:05:110
10050500,0irq/346-48484005770-1kworker/0:4H22:31:070
10050500,0irq/346-48484000-21swapper/021:28:370
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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