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2026-07-11 - 13:24

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 Sat Jul 11, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811350,0rcu_preempt3-21ksoftirqd/019:06:190
811310,0rcu_preempt19-21ksoftirqd/123:42:221
81840,0rcu_preempt54-21kswapd023:18:411
10050840,0irq/346-4848400111rcuc/022:10:000
81810,0rcu_preempt14650-1kworker/0:2H23:44:200
10050770,0irq/346-484840041ktimersoftd/022:16:510
10050770,0irq/346-484840041ktimersoftd/000:11:090
81760,0rcu_preempt19-21ksoftirqd/100:22:431
81750,0rcu_preempt24487-1kworker/0:0H19:42:260
81750,0rcu_preempt19-21ksoftirqd/121:50:291
81740,0rcu_preempt22711-21kworker/1:222:57:081
10050740,0irq/346-4848400111rcuc/022:39:390
10050720,0irq/346-484840041ktimersoftd/023:36:330
1333399716,0cyclictest0-21swapper/023:14:430
1333399702,0cyclictest0-21swapper/021:29:130
10050700,0irq/346-484840041ktimersoftd/000:14:150
1333399696,0cyclictest0-21swapper/021:43:540
81670,0rcu_preempt19-21ksoftirqd/122:47:301
81670,0rcu_preempt19-21ksoftirqd/122:47:301
81670,0rcu_preempt19-21ksoftirqd/122:17:321
81670,0rcu_preempt19-21ksoftirqd/122:12:341
81670,0rcu_preempt19-21ksoftirqd/121:10:451
81660,0rcu_preempt19-21ksoftirqd/122:06:481
81660,0rcu_preempt17846-21df_inode22:42:210
81650,0rcu_preempt3-21ksoftirqd/021:57:310
81640,0rcu_preempt19-21ksoftirqd/123:58:541
81640,0rcu_preempt19-21ksoftirqd/122:53:071
313902640,0chrt10050irq/346-484840000:33:450
1333399643,0cyclictest0-21swapper/022:58:570
81630,0rcu_preempt19-21ksoftirqd/120:32:181
1333399639,0cyclictest0-21swapper/022:27:230
1333399637,0cyclictest0-21swapper/021:20:340
81620,0rcu_preempt19-21ksoftirqd/123:12:401
81620,0rcu_preempt19-21ksoftirqd/121:17:301
81610,0rcu_preempt3-21ksoftirqd/023:27:260
81610,0rcu_preempt19-21ksoftirqd/123:06:521
81610,0rcu_preempt19-21ksoftirqd/121:43:581
81610,0rcu_preempt19-21ksoftirqd/120:12:231
81610,0rcu_preempt19-21ksoftirqd/120:12:231
1333399612,0cyclictest3780-21meminfo21:22:290
10050610,0irq/346-484840054-21kswapd021:23:481
81600,0rcu_preempt19-21ksoftirqd/122:27:331
81600,0rcu_preempt19-21ksoftirqd/121:29:041
1333399606,0cyclictest1348-21lldpd22:06:310
1333399602,0cyclictest9405-21diskmemload22:33:150
1333399602,0cyclictest9405-21diskmemload22:33:150
1333399602,0cyclictest13899-21munin-node0
1333399602,0cyclictest0-21swapper/023:37:300
1333399602,0cyclictest0-21swapper/021:09:280
1333399601,0cyclictest21539-21ssh23:18:040
81590,0rcu_preempt3-21ksoftirqd/020:27:170
81590,0rcu_preempt19-21ksoftirqd/122:42:391
81590,0rcu_preempt19-21ksoftirqd/100:17:231
1333399592,0cyclictest20799-21runrttasks00:22:500
1333399592,0cyclictest20641-21php-cgi19:27:340
13333995915,0cyclictest29843-21ssh21:16:360
81580,0rcu_preempt8966-21apt-get20:32:160
81580,0rcu_preempt19-21ksoftirqd/122:40:351
81580,0rcu_preempt19-21ksoftirqd/121:15:441
81580,0rcu_preempt0-21swapper/119:57:201
1333399582,0cyclictest19090-21fschecks_time21:02:230
1333399582,0cyclictest16624-21ping19:17:190
1333399582,0cyclictest0-21swapper/021:51:510
13333995813,0cyclictest0-21swapper/021:32:520
10050580,0irq/346-48484007007-1kworker/1:1H00:12:021
10050580,0irq/346-484840024978-21ssh00:27:281
81570,0rcu_preempt3-21ksoftirqd/021:37:300
81570,0rcu_preempt3-21ksoftirqd/000:17:170
1333399573,0cyclictest0-21swapper/023:52:060
13333995716,0cyclictest22554-21apt-get22:47:170
13333995716,0cyclictest22554-21apt-get22:47:170
13333995712,0cyclictest27752-21ssh23:24:430
13333995712,0cyclictest13550-21runrttasks23:10:360
13333995712,0cyclictest0-21swapper/000:30:550
10050570,0irq/346-48484007007-1kworker/1:1H00:12:421
1333399568,0cyclictest0-21swapper/022:56:130
1333399564,0cyclictest851-21rngd21:53:050
1333399562,0cyclictest16624-21ping19:32:240
1333399562,0cyclictest0-21swapper/023:02:250
13333995612,0cyclictest10050irq/346-484840000:04:030
1333399561,0cyclictest18422-21taskset19:22:170
10050560,0irq/346-48484007470-1kworker/1:1H23:07:361
10050560,0irq/346-484840031844-1kworker/1:2H00:36:061
81550,0rcu_preempt19-21ksoftirqd/122:24:021
81550,0rcu_preempt0-21swapper/123:30:551
81550,0rcu_preempt0-21swapper/120:22:341
81540,0rcu_preempt3-21ksoftirqd/020:17:400
81540,0rcu_preempt19-21ksoftirqd/123:52:231
1333399542,0cyclictest29380-21ping20:02:250
1333399542,0cyclictest0-21swapper/022:21:190
1333399542,0cyclictest0-21swapper/000:00:460
13333995411,0cyclictest27056-21munin-node0
10050540,0irq/346-484840054-21kswapd021:41:051
10050540,0irq/346-484840032461-1kworker/1:1H22:32:491
10050540,0irq/346-484840032461-1kworker/1:1H22:32:491
10050540,0irq/346-48484002062-1kworker/1:0H00:04:441
81530,0rcu_preempt3-21ksoftirqd/019:07:160
81530,0rcu_preempt15120-21apt-get19:12:170
1333399537,0cyclictest0-21swapper/023:52:080
1333399533,0cyclictest0-21swapper/019:55:100
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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