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2025-11-25 - 11:40

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 Nov 25, 2025 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1735021200,0sleep010050irq/346-484840020:17:330
76652860,0sleep19950irq/345-484840000:37:011
81780,0rcu_preempt3-21ksoftirqd/019:19:320
81760,0rcu_preempt19-21ksoftirqd/121:55:131
81730,0rcu_preempt3-21ksoftirqd/022:45:570
81730,0rcu_preempt17522-1kworker/1:2H22:17:211
81730,0rcu_preempt0-21swapper/122:06:021
81720,0rcu_preempt15751-21dropbear22:44:491
10050720,0irq/346-4848400181ktimersoftd/121:24:511
189552710,0chrt10050irq/346-484840020:22:010
10050710,0irq/346-484840029282-1kworker/0:1H23:10:020
81700,0rcu_preempt18708-21dropbear21:29:481
81700,0rcu_preempt0-21swapper/123:12:321
81700,0rcu_preempt0-21swapper/100:20:311
139082700,0sleep010050irq/346-484840020:05:420
81690,0rcu_preempt5636-21apt-get00:34:420
81690,0rcu_preempt0-21swapper/121:11:571
81690,0rcu_preempt0-21swapper/100:34:131
81680,0rcu_preempt19-21ksoftirqd/122:12:371
81680,0rcu_preempt19-21ksoftirqd/120:28:181
81680,0rcu_preempt0-21swapper/123:37:211
81680,0rcu_preempt0-21swapper/123:37:211
81680,0rcu_preempt0-21swapper/121:43:301
81680,0rcu_preempt0-21swapper/100:11:221
81670,0rcu_preempt3-21ksoftirqd/021:24:550
81670,0rcu_preempt19-21ksoftirqd/121:45:561
81670,0rcu_preempt19-21ksoftirqd/120:20:021
81670,0rcu_preempt19-21ksoftirqd/120:13:311
81670,0rcu_preempt0-21swapper/123:50:441
81670,0rcu_preempt0-21swapper/123:47:331
81670,0rcu_preempt0-21swapper/123:30:421
81670,0rcu_preempt0-21swapper/123:30:421
81670,0rcu_preempt0-21swapper/122:38:561
81670,0rcu_preempt0-21swapper/122:26:471
81670,0rcu_preempt0-21swapper/100:18:331
81670,0rcu_preempt0-21swapper/100:01:281
81660,0rcu_preempt19-21ksoftirqd/121:36:591
81660,0rcu_preempt19-21ksoftirqd/120:14:451
81650,0rcu_preempt0-21swapper/123:40:241
81650,0rcu_preempt0-21swapper/123:00:211
81650,0rcu_preempt0-21swapper/122:42:111
81650,0rcu_preempt0-21swapper/121:51:461
81650,0rcu_preempt0-21swapper/121:23:091
81650,0rcu_preempt0-21swapper/100:09:131
81640,0rcu_preempt19-21ksoftirqd/120:01:261
81640,0rcu_preempt0-21swapper/123:05:531
81640,0rcu_preempt0-21swapper/100:25:421
81610,0rcu_preempt3-21ksoftirqd/023:55:110
81610,0rcu_preempt3-21ksoftirqd/023:55:110
81610,0rcu_preempt19-21ksoftirqd/123:14:451
81600,0rcu_preempt3-21ksoftirqd/023:50:120
81590,0rcu_preempt3-21ksoftirqd/022:41:420
81590,0rcu_preempt3-21ksoftirqd/022:03:080
206632590,0sleep010050irq/346-484840020:27:510
10050580,0irq/346-4848400803-1kworker/0:1H21:49:400
81570,0rcu_preempt3-21ksoftirqd/023:45:020
81570,0rcu_preempt3-21ksoftirqd/021:49:210
10050570,0irq/346-484840025533-21apt-get19:04:440
81560,0rcu_preempt3-21ksoftirqd/000:32:240
81560,0rcu_preempt19-21ksoftirqd/120:09:171
10050560,0irq/346-48484000-21swapper/021:34:520
81550,0rcu_preempt3-21ksoftirqd/020:56:080
81550,0rcu_preempt3-21ksoftirqd/000:10:220
10050550,0irq/346-484840013321-1kworker/0:3H23:21:400
10050550,0irq/346-484840013321-1kworker/0:3H23:21:400
81540,0rcu_preempt3-21ksoftirqd/022:19:430
4350540,0irq/32-433000000-21swapper/023:24:470
10050540,0irq/346-48484001369-21runrttasks21:14:360
81530,0rcu_preempt29396-1kworker/0:1H22:34:550
81530,0rcu_preempt19-21ksoftirqd/122:49:481
81530,0rcu_preempt19-21ksoftirqd/122:29:451
81530,0rcu_preempt19-21ksoftirqd/121:04:391
10050530,0irq/346-48484008641-21ssh23:15:050
10050530,0irq/346-484840017523-1kworker/0:1H22:08:480
81520,0rcu_preempt19-21ksoftirqd/120:30:031
10050520,0irq/346-48484009692-1kworker/1:2H23:58:281
10050520,0irq/346-48484009692-1kworker/1:2H23:58:281
10050520,0irq/346-484840027117-21idleruntime-cro00:19:310
9950510,0irq/345-484840030302-21ping19:39:321
9950510,0irq/345-484840030302-21ping19:39:321
81510,0rcu_preempt19-21ksoftirqd/121:14:551
81510,0rcu_preempt19-21ksoftirqd/119:14:521
81510,0rcu_preempt19-21ksoftirqd/119:09:521
10050510,0irq/346-48484009156-1kworker/0:2H21:59:280
10050510,0irq/346-4848400751-21rngd23:37:030
10050510,0irq/346-4848400751-21rngd23:37:030
10050510,0irq/346-48484000-21swapper/022:16:220
81500,0rcu_preempt19-21ksoftirqd/123:24:491
2703199501,0cyclictest30686-21dropbear19:19:510
10050500,0irq/346-484840054-21kswapd023:19:441
10050500,0irq/346-484840054-21kswapd023:19:441
10050500,0irq/346-484840030381-1kworker/0:1H20:59:330
10050500,0irq/346-48484001582-1kworker/0:0H23:07:160
81490,0rcu_preempt3-21ksoftirqd/021:42:130
81490,0rcu_preempt3-21ksoftirqd/021:21:040
81490,0rcu_preempt19-21ksoftirqd/120:55:021
10050490,0irq/346-48484000-21swapper/022:52:190
81480,0rcu_preempt751-21rngd19:20:061
81480,0rcu_preempt392-21processes19:25:060
81480,0rcu_preempt3-21ksoftirqd/023:02:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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