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2026-03-26 - 18:36

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 Thu Mar 26, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811220,0rcu_preempt31400-21cat07:39:220
81880,0rcu_preempt3-21ksoftirqd/009:59:070
81870,0rcu_preempt54-21kswapd009:49:010
81870,0rcu_preempt3-21ksoftirqd/010:41:210
81870,0rcu_preempt3-21ksoftirqd/007:34:050
81820,0rcu_preempt3-21ksoftirqd/008:53:500
81780,0rcu_preempt851-21rngd10:49:000
81740,0rcu_preempt3-21ksoftirqd/009:39:350
81720,0rcu_preempt3-21ksoftirqd/011:59:450
81720,0rcu_preempt3-21ksoftirqd/011:59:450
81720,0rcu_preempt3-21ksoftirqd/009:29:540
81710,0rcu_preempt30599-21kworker/0:112:03:590
81690,0rcu_preempt3-21ksoftirqd/010:54:210
81690,0rcu_preempt3-21ksoftirqd/010:21:390
81680,0rcu_preempt3-21ksoftirqd/011:44:320
81680,0rcu_preempt3-21ksoftirqd/011:33:490
81680,0rcu_preempt29237-21kworker/1:110:15:491
81680,0rcu_preempt19-21ksoftirqd/107:58:241
81670,0rcu_preempt3-21ksoftirqd/009:20:220
81670,0rcu_preempt1470-21runrttasks09:32:081
81670,0rcu_preempt1406-21ssh10:19:521
81660,0rcu_preempt54-21kswapd009:59:461
81660,0rcu_preempt19-21ksoftirqd/111:02:491
81660,0rcu_preempt19-21ksoftirqd/108:23:181
81660,0rcu_preempt19-21ksoftirqd/108:14:031
81660,0rcu_preempt19-21ksoftirqd/108:13:141
81660,0rcu_preempt19-21ksoftirqd/108:03:161
81660,0rcu_preempt0-21swapper/110:51:231
81650,0rcu_preempt54-21kswapd010:30:341
81650,0rcu_preempt19-21ksoftirqd/111:30:551
81650,0rcu_preempt19-21ksoftirqd/111:27:281
81650,0rcu_preempt19-21ksoftirqd/108:04:531
81650,0rcu_preempt19-21ksoftirqd/107:22:381
10050650,0irq/346-484840054-21kswapd009:44:270
81640,0rcu_preempt54-21kswapd012:10:381
81640,0rcu_preempt54-21kswapd008:33:141
81640,0rcu_preempt3-21ksoftirqd/010:08:350
81640,0rcu_preempt3-21ksoftirqd/009:11:140
81640,0rcu_preempt3-21ksoftirqd/009:11:140
81640,0rcu_preempt20882-21ssh10:39:291
81640,0rcu_preempt19-21ksoftirqd/111:07:451
81640,0rcu_preempt19-21ksoftirqd/109:55:191
81640,0rcu_preempt0-21swapper/111:44:191
81640,0rcu_preempt0-21swapper/109:27:161
81630,0rcu_preempt28058-21kworker/1:012:26:011
81630,0rcu_preempt23888-21ping07:38:481
81630,0rcu_preempt19-21ksoftirqd/112:38:361
81630,0rcu_preempt19-21ksoftirqd/112:22:291
10050630,0irq/346-484840025912-1kworker/1:1H11:55:091
81620,0rcu_preempt54-21kswapd010:44:331
81620,0rcu_preempt54-21kswapd010:37:551
81620,0rcu_preempt54-21kswapd007:30:571
81620,0rcu_preempt3-21ksoftirqd/007:19:160
81620,0rcu_preempt23300-1kworker/0:2H10:11:200
81620,0rcu_preempt19-21ksoftirqd/112:32:111
81620,0rcu_preempt19-21ksoftirqd/112:16:291
81620,0rcu_preempt19-21ksoftirqd/111:21:171
81620,0rcu_preempt19-21ksoftirqd/111:15:331
81620,0rcu_preempt19-21ksoftirqd/110:12:091
81620,0rcu_preempt19-21ksoftirqd/109:12:271
81620,0rcu_preempt19-21ksoftirqd/109:12:271
81620,0rcu_preempt19-21ksoftirqd/109:01:441
81620,0rcu_preempt19-21ksoftirqd/107:27:571
81620,0rcu_preempt0-21swapper/111:09:481
10050620,0irq/346-48484008325-1kworker/1:3H12:06:451
81610,0rcu_preempt3-21ksoftirqd/011:19:060
81610,0rcu_preempt3-21ksoftirqd/009:04:060
81610,0rcu_preempt19-21ksoftirqd/110:06:301
81610,0rcu_preempt19-21ksoftirqd/109:34:211
81610,0rcu_preempt19-21ksoftirqd/108:34:061
81610,0rcu_preempt19-21ksoftirqd/108:24:271
81610,0rcu_preempt19-21ksoftirqd/107:44:121
10050610,0irq/346-484840031949-1kworker/1:1H09:46:281
10050610,0irq/346-484840030861-1kworker/1:2H12:01:161
10050610,0irq/346-484840030861-1kworker/1:2H12:01:161
10050610,0irq/346-484840025912-1kworker/1:1H11:52:301
10050610,0irq/346-48484001787-1kworker/0:1H10:24:210
81600,0rcu_preempt54-21kswapd010:23:531
81600,0rcu_preempt3-21ksoftirqd/012:34:090
81600,0rcu_preempt26797-21kworker/1:109:13:541
81600,0rcu_preempt19-21ksoftirqd/109:49:261
81600,0rcu_preempt19-21ksoftirqd/107:39:231
81600,0rcu_preempt19-21ksoftirqd/107:04:061
81590,0rcu_preempt19-21ksoftirqd/111:37:061
81580,0rcu_preempt3-21ksoftirqd/010:44:090
81580,0rcu_preempt19-21ksoftirqd/111:41:581
81580,0rcu_preempt19-21ksoftirqd/108:51:151
81580,0rcu_preempt19-21ksoftirqd/108:44:521
81580,0rcu_preempt0-21swapper/107:52:421
10050580,0irq/346-484840017850-1kworker/0:0H09:34:360
81570,0rcu_preempt6791-21ssh09:19:421
81570,0rcu_preempt54-21kswapd009:38:561
81570,0rcu_preempt54-21kswapd009:04:131
81570,0rcu_preempt54-21kswapd008:39:021
81570,0rcu_preempt19-21ksoftirqd/110:55:391
81570,0rcu_preempt0-21swapper/107:09:011
10050570,0irq/346-4848400851-21rngd11:05:210
81550,0rcu_preempt3-21ksoftirqd/011:39:060
81550,0rcu_preempt3-21ksoftirqd/007:04:100
10050550,0irq/346-4848400851-21rngd11:54:550
10050550,0irq/346-48484006853-21apt-get10:58:590
10050550,0irq/346-4848400500-1kworker/0:1H12:33:130
10050540,0irq/346-484840018862-1kworker/0:3H11:11:590
81520,0rcu_preempt3-21ksoftirqd/011:49:050
81520,0rcu_preempt14584-21apt-get08:28:590
10050520,0irq/346-484840054-21kswapd011:28:040
10050510,0irq/346-484840054-21kswapd009:55:420
10050510,0irq/346-484840013240-1kworker/0:2H12:11:330
81500,0rcu_preempt3-21ksoftirqd/008:09:160
81500,0rcu_preempt21882-21ps08:49:130
81500,0rcu_preempt19-21ksoftirqd/107:14:001
10050500,0irq/346-484840054-21kswapd012:19:310
10050500,0irq/346-484840054-21kswapd011:16:330
10050500,0irq/346-484840054-21kswapd010:36:580
81490,0rcu_preempt3-21ksoftirqd/008:34:140
81490,0rcu_preempt19-21ksoftirqd/108:58:451
10050490,0irq/346-484840054-21kswapd012:24:090
10050490,0irq/346-484840054-21kswapd012:14:070
10050490,0irq/346-484840054-21kswapd010:14:390
10050490,0irq/346-484840054-21kswapd009:27:120
10050490,0irq/346-484840054-21kswapd009:15:590
10050480,0irq/346-4848400851-21rngd11:35:510
10050480,0irq/346-48484000-21swapper/010:29:230
81450,0rcu_preempt3-21ksoftirqd/007:59:120
81440,0rcu_preempt3-21ksoftirqd/008:19:000
10050440,0irq/346-48484003-21ksoftirqd/007:53:210
81430,0rcu_preempt54-21kswapd008:27:320
81430,0rcu_preempt3-21ksoftirqd/008:04:160
81430,0rcu_preempt23050-21ntp_kernel_pll_07:14:130
2060899422,0cyclictest0-21swapper/008:17:340
81410,0rcu_preempt0-21swapper/008:39:030
1599410,0migration/025347-21munin-node0
81400,0rcu_preempt19497-21latency_hist08:43:490
81400,0rcu_preempt0-21swapper/007:09:150
2060899392,0cyclictest0-21swapper/007:29:230
20608993912,0cyclictest0-21swapper/007:44:200
81360,0rcu_preempt3-21ksoftirqd/007:54:060
2060899361,0cyclictest0-21swapper/007:27:530
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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