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2026-06-16 - 05:48

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 highest latencies:
System rackaslot5s.osadl.org (updated Tue Jun 16, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811040,0rcu_preempt3-21ksoftirqd/021:48:000
81750,0rcu_preempt18915-1kworker/0:2H21:23:160
81740,0rcu_preempt3-21ksoftirqd/021:42:420
81730,0rcu_preempt17118-1kworker/0:2H20:02:430
81720,0rcu_preempt3-21ksoftirqd/022:10:260
81700,0rcu_preempt3-21ksoftirqd/000:35:500
81690,0rcu_preempt3-21ksoftirqd/000:07:410
81690,0rcu_preempt3-21ksoftirqd/000:02:530
10050690,0irq/346-48484003620-1kworker/0:3H22:18:110
81680,0rcu_preempt7580-1kworker/0:2H23:20:010
81680,0rcu_preempt3-21ksoftirqd/022:27:510
81680,0rcu_preempt3-21ksoftirqd/021:41:090
81670,0rcu_preempt3-21ksoftirqd/022:02:330
81670,0rcu_preempt3-21ksoftirqd/000:16:270
10050670,0irq/346-4848400171rcuc/122:12:181
81660,0rcu_preempt4178-21kworker/0:019:38:040
81660,0rcu_preempt3-21ksoftirqd/023:22:590
81660,0rcu_preempt3-21ksoftirqd/022:24:320
81650,0rcu_preempt4275-21ps22:42:570
81640,0rcu_preempt3-21ksoftirqd/021:32:570
10050640,0irq/346-484840020516-1kworker/1:2H00:12:061
81630,0rcu_preempt3-21ksoftirqd/023:55:090
81630,0rcu_preempt3-21ksoftirqd/021:17:340
10050620,0irq/346-484840054-21kswapd000:27:161
10050620,0irq/346-484840015582-1kworker/1:0H00:01:341
10050610,0irq/346-484840054-21kswapd023:02:491
81600,0rcu_preempt3-21ksoftirqd/023:57:510
81600,0rcu_preempt3-21ksoftirqd/023:32:550
81600,0rcu_preempt3-21ksoftirqd/022:57:150
81600,0rcu_preempt19-21ksoftirqd/120:17:521
10050600,0irq/346-4848400974-1kworker/1:0H22:41:141
10050600,0irq/346-484840054-21kswapd023:39:531
10050600,0irq/346-484840015582-1kworker/1:0H00:04:121
9950590,0irq/345-48484001067-21lighttpd22:50:040
81590,0rcu_preempt6092-21ssh22:12:410
81590,0rcu_preempt3-21ksoftirqd/022:57:570
81590,0rcu_preempt3-21ksoftirqd/020:07:420
81580,0rcu_preempt3-21ksoftirqd/000:21:510
81580,0rcu_preempt19-21ksoftirqd/120:05:121
81580,0rcu_preempt19-21ksoftirqd/119:59:041
10050580,0irq/346-484840054-21kswapd021:44:471
10050580,0irq/346-484840030753-1kworker/1:1H23:11:291
10050580,0irq/346-484840029671-1kworker/1:1H00:18:001
81570,0rcu_preempt3-21ksoftirqd/019:28:060
81570,0rcu_preempt3-21ksoftirqd/019:22:520
81570,0rcu_preempt19-21ksoftirqd/120:08:191
10050570,0irq/346-48484008577-1kworker/1:0H22:16:061
10050570,0irq/346-484840020809-1kworker/1:2H23:01:451
10050570,0irq/346-484840012122-1kworker/1:0H00:30:061
81560,0rcu_preempt19-21ksoftirqd/120:22:331
81560,0rcu_preempt19-21ksoftirqd/120:22:331
81560,0rcu_preempt19-21ksoftirqd/119:56:481
10050560,0irq/346-484840054-21kswapd022:31:241
10050560,0irq/346-484840054-21kswapd021:54:240
10050560,0irq/346-484840018287-1kworker/1:1H23:33:581
10050560,0irq/346-48484001356-1kworker/1:3H21:41:551
81550,0rcu_preempt19-21ksoftirqd/120:14:261
10050550,0irq/346-484840054-21kswapd023:47:401
10050550,0irq/346-484840054-21kswapd022:25:371
10050550,0irq/346-48484004434-1kworker/1:0H21:09:011
10050550,0irq/346-484840028435-1kworker/0:0H22:36:210
10050550,0irq/346-484840015582-1kworker/1:0H00:13:511
10050550,0irq/346-48484001356-1kworker/1:3H21:35:261
10050550,0irq/346-484840012123-1kworker/0:2H00:30:440
10050540,0irq/346-4848400974-1kworker/1:0H22:43:271
10050540,0irq/346-48484007165-1kworker/0:1H00:26:370
10050540,0irq/346-484840054-21kswapd023:26:401
81530,0rcu_preempt3-21ksoftirqd/021:02:480
81530,0rcu_preempt19-21ksoftirqd/123:52:561
81530,0rcu_preempt19-21ksoftirqd/123:42:431
10050530,0irq/346-484840054-21kswapd023:28:171
10050530,0irq/346-484840054-21kswapd023:16:451
10050530,0irq/346-484840054-21kswapd000:36:111
10050530,0irq/346-484840028435-1kworker/0:0H22:38:270
10050530,0irq/346-484840021130-1kworker/1:0H21:55:011
10050530,0irq/346-484840017539-1kworker/0:1H23:37:570
10050530,0irq/346-484840013953-1kworker/0:0H21:15:110
10050520,0irq/346-48484009003-1kworker/1:2H21:18:541
10050520,0irq/346-48484008577-1kworker/1:0H22:19:391
10050520,0irq/346-48484006291-1kworker/1:0H21:49:271
10050520,0irq/346-484840054-21kswapd022:55:261
10050520,0irq/346-484840031068-1kworker/1:0H22:06:231
10050510,0irq/346-484840054-21kswapd023:11:560
10050510,0irq/346-484840054-21kswapd021:29:171
10050510,0irq/346-484840012551-1kworker/0:0H23:27:590
81500,0rcu_preempt31001-21ssh23:42:520
10050500,0irq/346-4848400681-1kworker/0:0H23:49:120
10050500,0irq/346-484840054-21kswapd021:58:140
10050500,0irq/346-484840028434-1kworker/1:1H22:35:251
81490,0rcu_preempt19-21ksoftirqd/119:38:071
10050490,0irq/346-484840054-21kswapd021:17:051
81480,0rcu_preempt3-21ksoftirqd/019:57:570
81480,0rcu_preempt3-21ksoftirqd/019:02:460
81480,0rcu_preempt2661-21ping19:27:481
81480,0rcu_preempt22926-21if_eth120:17:510
10050480,0irq/346-48484000-21swapper/023:03:570
81470,0rcu_preempt3-21ksoftirqd/020:37:560
81470,0rcu_preempt3-21ksoftirqd/020:37:560
81470,0rcu_preempt19-21ksoftirqd/120:52:411
81470,0rcu_preempt19-21ksoftirqd/119:22:431
10050470,0irq/346-484840054-21kswapd023:16:010
10050470,0irq/346-484840054-21kswapd021:10:000
81460,0rcu_preempt19-21ksoftirqd/119:42:521
10050460,0irq/346-484840023841-1kworker/1:3H21:26:141
10050460,0irq/346-484840023839-1kworker/0:0H21:27:440
81450,0rcu_preempt3-21ksoftirqd/019:12:420
10050450,0irq/346-484840026122-1kworker/1:2H22:02:281
81440,0rcu_preempt6374-21diskmemload22:49:001
81440,0rcu_preempt3901-21ntpdc20:57:530
81440,0rcu_preempt3-21ksoftirqd/020:47:450
81440,0rcu_preempt3-21ksoftirqd/019:07:550
81440,0rcu_preempt19-21ksoftirqd/120:35:051
81430,0rcu_preempt19-21ksoftirqd/120:27:411
81430,0rcu_preempt19-21ksoftirqd/119:47:581
81430,0rcu_preempt19-21ksoftirqd/119:09:161
81420,0rcu_preempt5601-21proc_pri21:02:551
81420,0rcu_preempt3-21ksoftirqd/020:32:570
81420,0rcu_preempt3-21ksoftirqd/020:27:550
81420,0rcu_preempt3-21ksoftirqd/020:12:570
81420,0rcu_preempt31783-21cyclictest23:21:111
81420,0rcu_preempt19-21ksoftirqd/121:02:301
81420,0rcu_preempt19-21ksoftirqd/120:47:421
81410,0rcu_preempt3-21ksoftirqd/019:52:580
81410,0rcu_preempt3-21ksoftirqd/019:47:560
81410,0rcu_preempt31437-1kworker/1:1H19:04:421
81410,0rcu_preempt19-21ksoftirqd/119:32:431
81410,0rcu_preempt1619-21cut20:52:430
81400,0rcu_preempt3-21ksoftirqd/020:22:570
81400,0rcu_preempt3-21ksoftirqd/020:22:570
81400,0rcu_preempt19-21ksoftirqd/120:37:351
81400,0rcu_preempt19-21ksoftirqd/120:37:351
81400,0rcu_preempt19-21ksoftirqd/119:17:501
81400,0rcu_preempt11197-21df19:42:470
81390,0rcu_preempt0-21swapper/120:46:501
81380,0rcu_preempt3-21ksoftirqd/020:42:510
81380,0rcu_preempt19-21ksoftirqd/119:15:451
9950370,0irq/345-48484000-21swapper/019:35:470
10050370,0irq/346-48484004305-21sh19:22:310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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