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2026-06-19 - 11:26

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 Jun 19, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81820,0rcu_preempt54-21kswapd021:15:551
81800,0rcu_preempt19-21ksoftirqd/121:09:111
81740,0rcu_preempt19-21ksoftirqd/122:10:471
81720,0rcu_preempt3-21ksoftirqd/020:37:490
81720,0rcu_preempt19-21ksoftirqd/119:38:001
81720,0rcu_preempt13316-21kworker/1:121:23:561
81720,0rcu_preempt13316-21kworker/1:121:23:561
81710,0rcu_preempt3-21ksoftirqd/023:43:360
81710,0rcu_preempt19-21ksoftirqd/119:42:531
81700,0rcu_preempt3-21ksoftirqd/021:23:000
81700,0rcu_preempt3-21ksoftirqd/021:23:000
81680,0rcu_preempt19-21ksoftirqd/120:37:431
81670,0rcu_preempt0-21swapper/121:27:521
81660,0rcu_preempt19-21ksoftirqd/121:21:471
9950650,0irq/345-4848400181ktimersoftd/100:36:201
81650,0rcu_preempt19-21ksoftirqd/123:27:411
81640,0rcu_preempt19-21ksoftirqd/122:47:521
81620,0rcu_preempt3-21ksoftirqd/023:09:120
81620,0rcu_preempt3-21ksoftirqd/023:09:120
81620,0rcu_preempt19-21ksoftirqd/122:31:431
81620,0rcu_preempt19-21ksoftirqd/122:01:111
81620,0rcu_preempt19-21ksoftirqd/100:03:531
9950610,0irq/345-484840081rcu_preempt23:58:391
81610,0rcu_preempt19-21ksoftirqd/119:31:361
81600,0rcu_preempt3-21ksoftirqd/020:29:370
81600,0rcu_preempt19-21ksoftirqd/123:07:291
81600,0rcu_preempt19-21ksoftirqd/123:07:291
81600,0rcu_preempt19-21ksoftirqd/122:52:571
81600,0rcu_preempt19-21ksoftirqd/121:50:311
81600,0rcu_preempt19-21ksoftirqd/120:17:561
81590,0rcu_preempt19-21ksoftirqd/123:42:561
81590,0rcu_preempt19-21ksoftirqd/122:14:151
81580,0rcu_preempt19-21ksoftirqd/122:20:561
9950570,0irq/345-484840024783-1kworker/1:1H23:13:151
9950570,0irq/345-484840019-21ksoftirqd/121:41:501
81570,0rcu_preempt0-21swapper/123:55:301
9950560,0irq/345-484840017197-1kworker/1:3H23:36:421
81560,0rcu_preempt3-21ksoftirqd/023:52:560
81560,0rcu_preempt29355-21kworker/0:021:02:420
81560,0rcu_preempt19-21ksoftirqd/100:12:061
81550,0rcu_preempt19-21ksoftirqd/100:30:121
9950540,0irq/345-484840032335-1kworker/1:1H22:44:211
9950540,0irq/345-484840027625-1kworker/1:2H21:34:321
9950540,0irq/345-484840019824-1kworker/1:3H23:04:211
9950540,0irq/345-484840017448-1kworker/1:0H22:42:261
9950540,0irq/345-484840010080-1kworker/1:1H21:52:331
81540,0rcu_preempt3-21ksoftirqd/023:05:530
81540,0rcu_preempt3-21ksoftirqd/022:37:550
81540,0rcu_preempt3-21ksoftirqd/022:19:020
81540,0rcu_preempt3-21ksoftirqd/022:14:270
81540,0rcu_preempt3-21ksoftirqd/019:15:100
81540,0rcu_preempt20619-21kworker/0:122:00:020
81540,0rcu_preempt19-21ksoftirqd/120:02:401
81540,0rcu_preempt17560-21kworker/0:223:27:550
9950530,0irq/345-48484000-21swapper/022:09:210
81530,0rcu_preempt3-21ksoftirqd/023:22:390
81530,0rcu_preempt3-21ksoftirqd/022:06:220
81530,0rcu_preempt3-21ksoftirqd/021:11:490
81530,0rcu_preempt19-21ksoftirqd/123:49:461
81530,0rcu_preempt19-21ksoftirqd/123:40:211
81530,0rcu_preempt19-21ksoftirqd/122:02:381
10050530,0irq/346-48484002340-1kworker/1:2H23:22:441
81520,0rcu_preempt3-21ksoftirqd/023:50:330
81520,0rcu_preempt3-21ksoftirqd/023:37:450
81520,0rcu_preempt3-21ksoftirqd/022:32:480
81520,0rcu_preempt3-21ksoftirqd/021:52:580
81520,0rcu_preempt19-21ksoftirqd/120:12:561
81520,0rcu_preempt19-21ksoftirqd/120:07:281
81520,0rcu_preempt19-21ksoftirqd/120:07:281
81520,0rcu_preempt19-21ksoftirqd/119:02:431
9950510,0irq/345-484840028089-21ssh00:17:561
9950510,0irq/345-484840014862-1kworker/1:0H23:00:071
9950510,0irq/345-48484000-21swapper/100:15:091
81510,0rcu_preempt3-21ksoftirqd/021:38:060
81510,0rcu_preempt3-21ksoftirqd/020:57:300
81510,0rcu_preempt3-21ksoftirqd/020:12:420
81510,0rcu_preempt22957-1grep00:12:530
81510,0rcu_preempt1005-21kworker/0:121:12:330
81510,0rcu_preempt0-21swapper/100:27:251
10050510,0irq/346-48484009495-21ssh21:48:130
9950500,0irq/345-484840029744-1kworker/1:0H23:18:551
9950500,0irq/345-484840029744-1kworker/1:0H23:18:551
9950500,0irq/345-48484000-21swapper/021:17:540
81500,0rcu_preempt9547-21ping20:07:510
81500,0rcu_preempt9547-21ping20:07:510
81500,0rcu_preempt9547-21ping19:57:371
81500,0rcu_preempt9547-21ping19:57:371
81500,0rcu_preempt851-21rngd23:14:050
81500,0rcu_preempt3-21ksoftirqd/023:33:090
81500,0rcu_preempt3-21ksoftirqd/021:34:480
81500,0rcu_preempt18934-21kworker/0:022:32:100
81500,0rcu_preempt13316-21kworker/1:121:45:571
9950490,0irq/345-484840022745-21ssh22:34:331
81490,0rcu_preempt3-21ksoftirqd/019:57:530
81490,0rcu_preempt3-21ksoftirqd/019:57:530
81490,0rcu_preempt3-21ksoftirqd/000:07:370
81490,0rcu_preempt3-21ksoftirqd/000:00:080
81490,0rcu_preempt27695-21kworker/0:119:55:110
81490,0rcu_preempt19-21ksoftirqd/119:11:051
9950480,0irq/345-48484000-21swapper/022:23:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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