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2026-09-14 - 03:07

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 Mon Sep 14, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811280,0rcu_preempt19-21ksoftirqd/123:50:461
811280,0rcu_preempt19-21ksoftirqd/123:39:301
811280,0rcu_preempt19-21ksoftirqd/100:04:591
811260,0rcu_preempt19-21ksoftirqd/121:20:191
811250,0rcu_preempt19-21ksoftirqd/121:11:081
811240,0rcu_preempt19-21ksoftirqd/100:12:441
811210,0rcu_preempt19-21ksoftirqd/123:32:121
811200,0rcu_preempt19-21ksoftirqd/122:21:441
811190,0rcu_preempt19-21ksoftirqd/123:21:551
811160,0rcu_preempt19-21ksoftirqd/122:49:251
811110,0rcu_preempt54-21kswapd000:34:341
811110,0rcu_preempt19-21ksoftirqd/123:14:151
811110,0rcu_preempt19-21ksoftirqd/119:30:251
811070,0rcu_preempt19-21ksoftirqd/122:39:341
811060,0rcu_preempt19-21ksoftirqd/122:17:451
811050,0rcu_preempt19-21ksoftirqd/123:24:431
811050,0rcu_preempt19-21ksoftirqd/121:34:131
811040,0rcu_preempt19-21ksoftirqd/121:59:371
811030,0rcu_preempt19-21ksoftirqd/123:18:471
811020,0rcu_preempt19-21ksoftirqd/122:10:061
811020,0rcu_preempt19-21ksoftirqd/119:43:341
811010,0rcu_preempt19-21ksoftirqd/100:29:471
811010,0rcu_preempt19-21ksoftirqd/100:14:471
811010,0rcu_preempt0-21swapper/100:04:151
811000,0rcu_preempt19-21ksoftirqd/122:47:441
81980,0rcu_preempt19-21ksoftirqd/122:54:591
81970,0rcu_preempt9111-1kworker/1:1H23:47:371
81970,0rcu_preempt54-21kswapd021:17:491
81970,0rcu_preempt54-21kswapd021:17:491
81970,0rcu_preempt19-21ksoftirqd/123:03:031
81970,0rcu_preempt19-21ksoftirqd/122:34:241
81970,0rcu_preempt19-21ksoftirqd/122:26:301
81970,0rcu_preempt19-21ksoftirqd/121:58:121
81970,0rcu_preempt19-21ksoftirqd/121:58:121
81960,0rcu_preempt6837-21cyclictest23:31:030
81950,0rcu_preempt19-21ksoftirqd/121:40:111
81950,0rcu_preempt19-21ksoftirqd/121:34:321
81940,0rcu_preempt54-21kswapd021:28:161
81940,0rcu_preempt19-21ksoftirqd/122:29:221
81930,0rcu_preempt19-21ksoftirqd/121:50:421
10050930,0irq/346-4848400111rcuc/021:19:330
81900,0rcu_preempt19-21ksoftirqd/123:06:331
81890,0rcu_preempt19-21ksoftirqd/119:44:531
10050830,0irq/346-4848400111rcuc/023:15:380
10050800,0irq/346-484840041ktimersoftd/022:25:560
81780,0rcu_preempt19-21ksoftirqd/119:59:301
10050770,0irq/346-4848400111rcuc/022:03:350
10050760,0irq/346-484840054-21kswapd022:30:490
10050760,0irq/346-484840054-21kswapd022:18:580
10050760,0irq/346-4848400111rcuc/022:52:020
10050750,0irq/346-484840054-21kswapd023:59:450
10050750,0irq/346-4848400111rcuc/022:07:070
10050740,0irq/346-48484006417-1kworker/0:1H23:11:040
10050740,0irq/346-484840021796-1kworker/0:2H00:32:020
10050740,0irq/346-484840016499-1kworker/0:1H21:11:580
10050730,0irq/346-484840026792-1kworker/0:1H00:38:470
10050720,0irq/346-484840014123-1kworker/0:0H00:17:330
10050720,0irq/346-4848400111rcuc/000:22:410
81710,0rcu_preempt19-21ksoftirqd/120:14:401
10050710,0irq/346-484840014123-1kworker/0:0H23:55:110
10050700,0irq/346-484840028032-1kworker/0:1H00:06:000
10050700,0irq/346-484840011857-1kworker/0:0H22:13:110
10050690,0irq/346-484840031491-1kworker/0:3H21:40:290
10050690,0irq/346-484840026468-1kworker/0:0H23:34:520
10050690,0irq/346-484840021147-1kworker/0:3H22:21:030
10050690,0irq/346-484840014123-1kworker/0:0H23:50:520
81680,0rcu_preempt1763-1kworker/1:1H00:23:431
81670,0rcu_preempt19-21ksoftirqd/120:49:291
10050670,0irq/346-4848400111rcuc/021:28:130
81660,0rcu_preempt19-21ksoftirqd/120:19:321
10050660,0irq/346-484840041ktimersoftd/023:41:510
10050660,0irq/346-484840016499-1kworker/0:1H21:14:530
10050660,0irq/346-484840016499-1kworker/0:1H21:14:530
10050650,0irq/346-48484004581-1kworker/0:2H22:37:120
81610,0rcu_preempt19-21ksoftirqd/123:58:331
81590,0rcu_preempt3-21ksoftirqd/023:21:060
81560,0rcu_preempt10232-1kworker/0:2H20:59:180
10050560,0irq/346-484840055762chrt21:33:110
81540,0rcu_preempt19-21ksoftirqd/120:14:171
10050540,0irq/346-48484004115-1kworker/0:0H21:35:460
10050540,0irq/346-48484000-21swapper/022:59:190
81530,0rcu_preempt3-21ksoftirqd/021:49:090
81530,0rcu_preempt3-21ksoftirqd/021:49:090
10050530,0irq/346-484840054-21kswapd021:46:201
10050530,0irq/346-484840054-21kswapd021:46:201
10050510,0irq/346-48484009578-1kworker/0:1H22:45:150
10050510,0irq/346-4848400945-1kworker/0:2H00:10:500
81500,0rcu_preempt3-21ksoftirqd/020:05:080
81500,0rcu_preempt3-21ksoftirqd/020:05:080
10050490,0irq/346-484840025511-21ssh21:53:040
10050490,0irq/346-48484001907-21sendmail-msp23:39:171
81480,0rcu_preempt3-21ksoftirqd/020:21:360
81480,0rcu_preempt3-21ksoftirqd/019:59:560
81480,0rcu_preempt19-21ksoftirqd/119:14:271
81470,0rcu_preempt3-21ksoftirqd/022:54:290
81470,0rcu_preempt3-21ksoftirqd/020:28:030
81470,0rcu_preempt3-21ksoftirqd/020:18:030
81470,0rcu_preempt3-21ksoftirqd/020:10:470
10050470,0irq/346-48484004095-1kworker/0:0H23:45:350
81460,0rcu_preempt17860-21ssh00:27:110
81450,0rcu_preempt9789-1kworker/1:1H19:19:491
81450,0rcu_preempt5333-21apt-get19:04:280
81450,0rcu_preempt3-21ksoftirqd/020:34:140
81450,0rcu_preempt3-21ksoftirqd/019:57:590
81450,0rcu_preempt19-21ksoftirqd/119:24:581
10050450,0irq/346-484840054-21kswapd023:26:030
10050450,0irq/346-484840010123-21ping19:19:180
81440,0rcu_preempt3-21ksoftirqd/019:49:570
81440,0rcu_preempt23051-21ping20:24:321
81440,0rcu_preempt22454-21ps19:54:401
81440,0rcu_preempt20760-21kworker/1:020:41:111
81440,0rcu_preempt19-21ksoftirqd/119:04:371
10050440,0irq/346-484840054-21kswapd023:08:210
81430,0rcu_preempt4697-21kworker/0:120:51:480
81430,0rcu_preempt3-21ksoftirqd/022:44:160
81430,0rcu_preempt3-21ksoftirqd/021:55:080
81430,0rcu_preempt3-21ksoftirqd/021:55:080
81430,0rcu_preempt3-21ksoftirqd/019:47:550
81430,0rcu_preempt15131-21kworker/dying19:39:180
10050430,0irq/346-484840054-21kswapd019:39:190
10050430,0irq/346-48484000-21swapper/020:39:170
81420,0rcu_preempt8674-21kworker/0:119:10:240
81420,0rcu_preempt3-21ksoftirqd/021:05:590
81420,0rcu_preempt3-21ksoftirqd/020:46:460
81420,0rcu_preempt19-21ksoftirqd/120:54:401
81420,0rcu_preempt19-21ksoftirqd/119:36:211
81410,0rcu_preempt19-21ksoftirqd/122:09:171
81410,0rcu_preempt19-21ksoftirqd/120:59:411
81410,0rcu_preempt19-21ksoftirqd/120:04:471
81410,0rcu_preempt19-21ksoftirqd/120:04:471
81400,0rcu_preempt19-21ksoftirqd/120:34:351
81400,0rcu_preempt19-21ksoftirqd/119:49:321
81400,0rcu_preempt19-21ksoftirqd/119:09:471
81400,0rcu_preempt19-21ksoftirqd/100:24:361
81400,0rcu_preempt12550-21diskstats21:04:321
10050400,0irq/346-484840054-21kswapd021:01:140
10050400,0irq/346-48484000-21swapper/020:41:100
10050400,0irq/346-48484000-21swapper/019:19:210
81390,0rcu_preempt19-21ksoftirqd/120:44:371
81390,0rcu_preempt19-21ksoftirqd/120:29:331
6838993913,0cyclictest0-21swapper/019:29:510
683899372,0cyclictest13085-1kworker/0:1H19:29:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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