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2026-10-27 - 03:01

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 Tue Oct 27, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81760,0rcu_preempt22897-1kworker/0:0H19:20:500
81740,0rcu_preempt19-21ksoftirqd/120:23:111
81740,0rcu_preempt0-21swapper/122:36:561
10050730,0irq/346-484840015576-1kworker/0:3H00:14:420
81720,0rcu_preempt19-21ksoftirqd/120:09:581
81710,0rcu_preempt3434-21ssh22:21:221
81700,0rcu_preempt7019-21kworker/1:221:29:481
81690,0rcu_preempt19-21ksoftirqd/121:40:401
81680,0rcu_preempt7922-21ssh21:20:351
81680,0rcu_preempt19-21ksoftirqd/122:49:591
81680,0rcu_preempt19-21ksoftirqd/122:31:291
81680,0rcu_preempt0-21swapper/122:54:511
81670,0rcu_preempt20016-21ssh23:10:311
81670,0rcu_preempt19-21ksoftirqd/122:25:341
81670,0rcu_preempt19-21ksoftirqd/122:14:041
81660,0rcu_preempt19-21ksoftirqd/123:22:251
81660,0rcu_preempt19-21ksoftirqd/123:19:351
81650,0rcu_preempt19-21ksoftirqd/123:53:521
81650,0rcu_preempt19-21ksoftirqd/121:35:281
81640,0rcu_preempt19-21ksoftirqd/122:19:031
81640,0rcu_preempt19-21ksoftirqd/120:01:001
81640,0rcu_preempt0-21swapper/122:42:071
81630,0rcu_preempt3-21ksoftirqd/020:29:360
81630,0rcu_preempt2604-21ssh23:59:071
81630,0rcu_preempt19-21ksoftirqd/123:05:371
81620,0rcu_preempt3-21ksoftirqd/021:32:240
81610,0rcu_preempt3-21ksoftirqd/000:00:050
81610,0rcu_preempt19-21ksoftirqd/123:49:181
81610,0rcu_preempt19-21ksoftirqd/122:45:031
81610,0rcu_preempt19-21ksoftirqd/121:44:511
81610,0rcu_preempt19-21ksoftirqd/121:05:001
81600,0rcu_preempt5594-21apt-get00:34:471
81600,0rcu_preempt3-21ksoftirqd/022:49:450
81600,0rcu_preempt19-21ksoftirqd/123:41:151
81600,0rcu_preempt19-21ksoftirqd/123:33:231
81600,0rcu_preempt19-21ksoftirqd/122:04:251
81600,0rcu_preempt19-21ksoftirqd/120:05:511
81590,0rcu_preempt19-21ksoftirqd/121:55:171
81590,0rcu_preempt19-21ksoftirqd/121:55:171
81590,0rcu_preempt19-21ksoftirqd/121:51:121
81590,0rcu_preempt19-21ksoftirqd/121:10:591
81590,0rcu_preempt19-21ksoftirqd/120:27:181
81590,0rcu_preempt19-21ksoftirqd/100:03:191
9950580,0irq/345-4848400171rcuc/100:15:151
81580,0rcu_preempt19-21ksoftirqd/123:03:411
81580,0rcu_preempt19-21ksoftirqd/122:08:241
81580,0rcu_preempt19-21ksoftirqd/120:50:021
81580,0rcu_preempt19-21ksoftirqd/120:32:211
81580,0rcu_preempt19-21ksoftirqd/100:24:361
81570,0rcu_preempt3-21ksoftirqd/023:53:590
81570,0rcu_preempt3-21ksoftirqd/021:28:100
81570,0rcu_preempt30661-1kworker/1:3H23:24:581
81570,0rcu_preempt19-21ksoftirqd/120:16:391
81570,0rcu_preempt19-21ksoftirqd/100:05:091
81570,0rcu_preempt19-21ksoftirqd/100:05:091
81560,0rcu_preempt19-21ksoftirqd/121:00:021
81560,0rcu_preempt19-21ksoftirqd/119:09:581
81560,0rcu_preempt19-21ksoftirqd/100:20:011
81560,0rcu_preempt0-21swapper/023:05:190
81550,0rcu_preempt19-21ksoftirqd/121:24:591
81550,0rcu_preempt19-21ksoftirqd/120:54:451
81550,0rcu_preempt19-21ksoftirqd/119:50:011
81550,0rcu_preempt1522-21kworker/0:021:51:470
10050550,0irq/346-48484005481-21taskset23:29:250
81540,0rcu_preempt3-21ksoftirqd/022:21:270
81540,0rcu_preempt3-21ksoftirqd/021:39:550
81540,0rcu_preempt19-21ksoftirqd/121:15:361
81540,0rcu_preempt19-21ksoftirqd/120:46:041
81540,0rcu_preempt19-21ksoftirqd/119:35:071
10050540,0irq/346-484840041ktimersoftd/022:09:570
81530,0rcu_preempt19-21ksoftirqd/123:35:041
81530,0rcu_preempt19-21ksoftirqd/123:35:041
81530,0rcu_preempt19-21ksoftirqd/119:14:551
81520,0rcu_preempt3-21ksoftirqd/022:14:470
81520,0rcu_preempt21148-21kworker/0:219:29:530
81520,0rcu_preempt19-21ksoftirqd/119:54:471
10050520,0irq/346-48484000-21swapper/021:59:040
10050520,0irq/346-48484000-21swapper/021:59:040
81510,0rcu_preempt3-21ksoftirqd/020:29:550
81510,0rcu_preempt3-21ksoftirqd/020:09:470
81510,0rcu_preempt19-21ksoftirqd/120:39:591
9950500,0irq/345-48484000-21swapper/000:23:400
5150500,0irq/332-48070003501-21kworker/0:222:59:150
10050500,0irq/346-4848400765-21rngd21:21:560
10050500,0irq/346-484840025708-1kworker/0:1H23:19:450
81490,0rcu_preempt765-21rngd22:28:070
81490,0rcu_preempt3-21ksoftirqd/023:54:480
81490,0rcu_preempt3-21ksoftirqd/022:32:550
81490,0rcu_preempt3-21ksoftirqd/021:16:410
10050490,0irq/346-484840026103-1kworker/0:1H21:44:520
81480,0rcu_preempt3-21ksoftirqd/020:14:360
81480,0rcu_preempt3-21ksoftirqd/019:04:510
81480,0rcu_preempt19-21ksoftirqd/120:37:571
81480,0rcu_preempt19-21ksoftirqd/100:32:171
81480,0rcu_preempt19-21ksoftirqd/100:11:041
10050480,0irq/346-484840019441-21ssh22:04:590
10050480,0irq/346-48484000-21swapper/023:39:350
10050480,0irq/346-48484000-21swapper/023:39:350
10050480,0irq/346-48484000-21swapper/023:02:230
9950470,0irq/345-48484006741-21grep00:35:070
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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