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2025-12-07 - 09:24

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 highest latencies:
System rackaslot5s.osadl.org (updated Sun Dec 07, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811010,0rcu_preempt19-21ksoftirqd/123:59:131
811000,0rcu_preempt19-21ksoftirqd/100:20:081
289322970,0sleep010050irq/346-484840020:01:460
81960,0rcu_preempt19-21ksoftirqd/121:39:301
81960,0rcu_preempt19-21ksoftirqd/100:14:561
81950,0rcu_preempt54-21kswapd021:31:591
81950,0rcu_preempt19-21ksoftirqd/123:30:221
81950,0rcu_preempt19-21ksoftirqd/123:28:461
81950,0rcu_preempt19-21ksoftirqd/123:11:571
81950,0rcu_preempt19-21ksoftirqd/120:24:341
81950,0rcu_preempt19-21ksoftirqd/119:59:351
81940,0rcu_preempt24493-21kworker/1:223:04:241
81930,0rcu_preempt19-21ksoftirqd/121:23:371
81930,0rcu_preempt0-21swapper/121:24:281
81900,0rcu_preempt19-21ksoftirqd/119:45:281
81890,0rcu_preempt19-21ksoftirqd/123:03:301
81880,0rcu_preempt19-21ksoftirqd/123:16:501
81880,0rcu_preempt19-21ksoftirqd/122:26:011
81880,0rcu_preempt19-21ksoftirqd/121:46:201
81870,0rcu_preempt19-21ksoftirqd/123:43:241
81870,0rcu_preempt19-21ksoftirqd/123:43:241
81860,0rcu_preempt54-21kswapd022:00:521
81860,0rcu_preempt19-21ksoftirqd/100:25:101
81860,0rcu_preempt19-21ksoftirqd/100:02:061
81850,0rcu_preempt54-21kswapd022:52:331
81850,0rcu_preempt19-21ksoftirqd/123:47:411
81850,0rcu_preempt19-21ksoftirqd/123:21:101
81850,0rcu_preempt19-21ksoftirqd/121:50:551
81840,0rcu_preempt19-21ksoftirqd/100:07:141
81830,0rcu_preempt19-21ksoftirqd/119:34:351
81820,0rcu_preempt19-21ksoftirqd/123:36:461
81810,0rcu_preempt19-21ksoftirqd/120:20:241
81810,0rcu_preempt19-21ksoftirqd/120:11:541
81810,0rcu_preempt19-21ksoftirqd/120:05:371
81810,0rcu_preempt19-21ksoftirqd/120:05:371
81800,0rcu_preempt19-21ksoftirqd/119:29:391
81790,0rcu_preempt19-21ksoftirqd/121:19:211
81780,0rcu_preempt19-21ksoftirqd/122:41:541
81780,0rcu_preempt19-21ksoftirqd/120:29:541
81780,0rcu_preempt19-21ksoftirqd/119:19:551
81770,0rcu_preempt19-21ksoftirqd/121:36:251
81770,0rcu_preempt19-21ksoftirqd/120:18:001
81770,0rcu_preempt19-21ksoftirqd/100:09:291
81750,0rcu_preempt5627-21ssh22:59:320
81750,0rcu_preempt19-21ksoftirqd/122:24:211
81740,0rcu_preempt19-21ksoftirqd/122:47:471
81740,0rcu_preempt19-21ksoftirqd/122:04:521
81740,0rcu_preempt19-21ksoftirqd/119:41:541
272752740,0chrt9950irq/345-484840023:26:520
81730,0rcu_preempt19-21ksoftirqd/122:56:491
81730,0rcu_preempt19-21ksoftirqd/122:37:261
81730,0rcu_preempt19-21ksoftirqd/122:11:521
81730,0rcu_preempt19-21ksoftirqd/121:11:481
81730,0rcu_preempt19-21ksoftirqd/120:47:081
81730,0rcu_preempt19-21ksoftirqd/120:39:351
81730,0rcu_preempt19-21ksoftirqd/119:24:281
81730,0rcu_preempt19-21ksoftirqd/100:33:011
81730,0rcu_preempt11694-21kworker/1:120:34:401
81720,0rcu_preempt19-21ksoftirqd/121:57:201
81720,0rcu_preempt19-21ksoftirqd/121:00:151
81720,0rcu_preempt19-21ksoftirqd/121:00:151
81720,0rcu_preempt19-21ksoftirqd/120:54:581
81720,0rcu_preempt19-21ksoftirqd/120:50:471
81710,0rcu_preempt19-21ksoftirqd/122:30:511
81710,0rcu_preempt19-21ksoftirqd/121:05:521
81710,0rcu_preempt19-21ksoftirqd/119:58:531
81710,0rcu_preempt13098-21kworker/u4:000:36:211
81710,0rcu_preempt13098-21kworker/u4:000:36:211
81700,0rcu_preempt54-21kswapd022:15:081
81700,0rcu_preempt19-21ksoftirqd/119:50:411
321542700,0sleep010050irq/346-484840020:11:160
81680,0rcu_preempt19-21ksoftirqd/119:17:251
81680,0rcu_preempt19-21ksoftirqd/119:17:251
81680,0rcu_preempt19-21ksoftirqd/119:09:461
81670,0rcu_preempt19-21ksoftirqd/123:50:511
81660,0rcu_preempt3-21ksoftirqd/021:40:140
81630,0rcu_preempt3-21ksoftirqd/022:29:480
81620,0rcu_preempt54-21kswapd023:29:460
10050620,0irq/346-484840017856-1kworker/0:3H00:10:440
81610,0rcu_preempt54-21kswapd020:22:130
81610,0rcu_preempt3-21ksoftirqd/021:15:320
10050610,0irq/346-484840025657-1kworker/0:0H00:25:590
81600,0rcu_preempt54-21kswapd023:52:070
81600,0rcu_preempt54-21kswapd022:02:010
81600,0rcu_preempt3-21ksoftirqd/021:36:140
81600,0rcu_preempt3-21ksoftirqd/019:09:380
81590,0rcu_preempt3-21ksoftirqd/023:54:230
81590,0rcu_preempt3-21ksoftirqd/022:45:300
81590,0rcu_preempt3-21ksoftirqd/000:05:450
81570,0rcu_preempt3-21ksoftirqd/023:19:220
81570,0rcu_preempt3-21ksoftirqd/022:37:190
81570,0rcu_preempt3-21ksoftirqd/022:09:290
10050570,0irq/346-484840028338-1kworker/0:1H22:54:370
81560,0rcu_preempt3-21ksoftirqd/023:45:080
10050520,0irq/346-4848400751-21rngd23:39:030
10050510,0irq/346-48484007714-21ssh23:44:200
10050510,0irq/346-48484007714-21ssh23:44:200
10050510,0irq/346-4848400751-21rngd22:18:330
51072500,0sleep010050irq/346-484840020:29:290
10050500,0irq/346-484840054-21kswapd023:15:100
10050500,0irq/346-484840054-21kswapd022:52:200
10050500,0irq/346-484840032165-1kworker/0:2H21:29:370
10050490,0irq/346-484840054-21kswapd023:12:220
10050490,0irq/346-484840013928-21ssh21:44:460
10050490,0irq/346-48484000-21swapper/021:19:260
10050490,0irq/346-48484000-21swapper/000:19:260
10050480,0irq/346-484840031772-21ssh00:14:430
10050480,0irq/346-484840024471-1kworker/0:0H22:42:320
10050480,0irq/346-48484000-21swapper/023:08:580
10050480,0irq/346-48484000-21swapper/021:50:250
10050480,0irq/346-48484000-21swapper/021:09:330
15632470,0sleep010050irq/346-484840020:18:090
10050470,0irq/346-484840054-21kswapd022:19:250
10050470,0irq/346-48484000-21swapper/022:29:200
10050470,0irq/346-48484000-21swapper/019:54:430
81460,0rcu_preempt24435-21kworker/0:022:04:370
10050460,0irq/346-484840054-21kswapd023:59:430
10050460,0irq/346-48484003-21ksoftirqd/019:39:250
10050460,0irq/346-484840027380-21ping20:24:430
13150450,0irq/301-48020003-21ksoftirqd/019:19:380
10050450,0irq/346-48484007912-1kworker/0:0H20:44:400
1117299442,0cyclictest21002-21sendmail19:39:200
10050440,0irq/346-484840022611-1kworker/0:1H21:58:460
10050440,0irq/346-48484000-21swapper/021:27:030
10050430,0irq/346-48484000-21swapper/000:37:310
10050430,0irq/346-48484000-21swapper/000:37:310
10050430,0irq/346-48484000-21swapper/000:33:450
10050420,0irq/346-484840014482-1kworker/0:0H20:59:220
10050420,0irq/346-484840014482-1kworker/0:0H20:59:220
10050410,0irq/346-484840025563-1kworker/0:2H19:54:200
10050410,0irq/346-484840014098-1kworker/0:0H19:15:590
10050410,0irq/346-484840014098-1kworker/0:0H19:15:590
81400,0rcu_preempt3-21ksoftirqd/019:04:460
10050400,0irq/346-48484008256-21sendmail20:39:200
10050400,0irq/346-484840011212-1kworker/0:1H20:49:360
9950390,0irq/345-484840014451-21ping19:44:390
1117299392,0cyclictest14451-21ping19:24:380
11172993912,0cyclictest0-21swapper/019:30:560
10050390,0irq/346-484840028859-1kworker/0:4H20:04:380
10050390,0irq/346-484840028859-1kworker/0:4H20:04:380
10050390,0irq/346-484840016137-1kworker/0:2H21:04:350
10050390,0irq/346-484840012848-1kworker/0:3H20:54:480
10050390,0irq/346-48484000-21swapper/020:39:240
81370,0rcu_preempt19-21ksoftirqd/119:04:471
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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