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2026-06-27 - 00:01

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 Fri Jun 26, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811360,0rcu_preempt3-21ksoftirqd/012:02:370
811360,0rcu_preempt3-21ksoftirqd/012:02:370
811080,0rcu_preempt19-21ksoftirqd/108:21:441
81980,0rcu_preempt19-21ksoftirqd/109:33:561
81950,0rcu_preempt54-21kswapd011:47:251
81900,0rcu_preempt19-21ksoftirqd/111:05:561
81880,0rcu_preempt19-21ksoftirqd/110:08:471
81880,0rcu_preempt0-21swapper/109:14:411
81870,0rcu_preempt54-21kswapd011:38:311
81870,0rcu_preempt54-21kswapd010:58:311
81870,0rcu_preempt19-21ksoftirqd/111:35:091
81860,0rcu_preempt19-21ksoftirqd/111:13:451
81860,0rcu_preempt19-21ksoftirqd/110:01:001
81850,0rcu_preempt19-21ksoftirqd/110:56:391
81850,0rcu_preempt12797-21ssh12:27:371
81840,0rcu_preempt19-21ksoftirqd/111:44:491
81830,0rcu_preempt54-21kswapd009:45:261
81820,0rcu_preempt19-21ksoftirqd/112:15:031
81800,0rcu_preempt19-21ksoftirqd/112:07:061
81800,0rcu_preempt19-21ksoftirqd/112:07:061
81800,0rcu_preempt10335-21kworker/1:211:56:151
81780,0rcu_preempt19-21ksoftirqd/112:20:481
81780,0rcu_preempt19-21ksoftirqd/109:09:411
81760,0rcu_preempt15565-21ssh10:19:031
81750,0rcu_preempt19-21ksoftirqd/108:01:061
81750,0rcu_preempt0-21swapper/111:59:291
81750,0rcu_preempt0-21swapper/108:27:241
81740,0rcu_preempt851-21rngd12:09:501
81740,0rcu_preempt20310-21ssh09:18:061
9950720,0irq/345-4848400171rcuc/110:28:201
9950720,0irq/345-4848400171rcuc/110:28:201
81720,0rcu_preempt19-21ksoftirqd/110:48:351
81720,0rcu_preempt19-21ksoftirqd/110:48:351
81720,0rcu_preempt19-21ksoftirqd/109:29:091
81710,0rcu_preempt19-21ksoftirqd/110:41:211
81710,0rcu_preempt19-21ksoftirqd/110:41:211
81710,0rcu_preempt16563-21kworker/1:110:44:481
81700,0rcu_preempt8664-21diskmemload09:47:290
81700,0rcu_preempt16563-21kworker/1:110:24:041
81700,0rcu_preempt16563-21kworker/1:110:16:041
81690,0rcu_preempt54-21kswapd012:35:421
81690,0rcu_preempt19-21ksoftirqd/111:11:521
81670,0rcu_preempt4950-21ping07:31:181
81650,0rcu_preempt3-21ksoftirqd/012:16:570
81650,0rcu_preempt19-21ksoftirqd/108:25:271
81640,0rcu_preempt3-21ksoftirqd/009:58:120
81640,0rcu_preempt19-21ksoftirqd/108:57:301
81640,0rcu_preempt19-21ksoftirqd/107:24:361
10050640,0irq/346-4848400171rcuc/110:36:141
81630,0rcu_preempt19-21ksoftirqd/111:20:021
81630,0rcu_preempt19-21ksoftirqd/109:37:301
81630,0rcu_preempt19-21ksoftirqd/108:02:401
81630,0rcu_preempt14072-21ssh10:17:420
81620,0rcu_preempt3-21ksoftirqd/007:12:500
81620,0rcu_preempt19-21ksoftirqd/110:06:011
10050620,0irq/346-484840010577-1kworker/0:2H11:56:410
81610,0rcu_preempt3-21ksoftirqd/011:24:200
81610,0rcu_preempt3-21ksoftirqd/010:12:480
81610,0rcu_preempt19-21ksoftirqd/111:26:351
81610,0rcu_preempt19-21ksoftirqd/109:49:091
10050610,0irq/346-4848400171rcuc/109:22:521
81590,0rcu_preempt54-21kswapd010:54:080
81580,0rcu_preempt19-21ksoftirqd/108:42:471
81580,0rcu_preempt19-21ksoftirqd/108:32:371
81580,0rcu_preempt19-21ksoftirqd/107:52:411
81570,0rcu_preempt54-21kswapd009:46:000
81570,0rcu_preempt3-21ksoftirqd/010:34:050
81570,0rcu_preempt25320-21php-cgi09:56:461
81570,0rcu_preempt19-21ksoftirqd/112:22:301
81570,0rcu_preempt19-21ksoftirqd/111:27:221
81570,0rcu_preempt19-21ksoftirqd/107:07:371
81570,0rcu_preempt19-21ksoftirqd/107:07:371
81560,0rcu_preempt3-21ksoftirqd/010:25:340
81560,0rcu_preempt19-21ksoftirqd/108:16:361
10050550,0irq/346-48484009009-21ssh09:39:480
10050550,0irq/346-484840054-21kswapd010:27:330
10050550,0irq/346-484840054-21kswapd010:27:330
81540,0rcu_preempt19-21ksoftirqd/108:08:011
10050540,0irq/346-4848400851-21rngd10:51:570
10050540,0irq/346-4848400851-21rngd10:51:570
81530,0rcu_preempt19-21ksoftirqd/109:02:351
81530,0rcu_preempt19-21ksoftirqd/108:47:391
10050520,0irq/346-4848400851-21rngd11:47:300
10050520,0irq/346-484840054-21kswapd012:07:460
10050520,0irq/346-48484005071-1kworker/0:3H11:15:430
10050520,0irq/346-484840022572-1kworker/0:0H11:00:260
81510,0rcu_preempt32568-21apt-get07:02:320
81510,0rcu_preempt3-21ksoftirqd/011:37:440
81510,0rcu_preempt3-21ksoftirqd/011:02:480
81510,0rcu_preempt3-21ksoftirqd/009:27:350
166999512,0cyclictest4950-21ping07:37:460
10050510,0irq/346-484840054-21kswapd010:38:310
10050510,0irq/346-484840054-21kswapd010:38:310
9950500,0irq/345-48484000-21swapper/009:21:370
81500,0rcu_preempt19-21ksoftirqd/107:12:381
10050500,0irq/346-484840054-21kswapd009:09:470
81490,0rcu_preempt3-21ksoftirqd/010:47:200
167099491,0cyclictest5400-21munin-node1
10050490,0irq/346-484840022923-1kworker/0:2H09:56:470
10050490,0irq/346-48484000-21swapper/010:09:030
81480,0rcu_preempt3-21ksoftirqd/009:25:200
81480,0rcu_preempt3-21ksoftirqd/008:32:200
81470,0rcu_preempt3-21ksoftirqd/008:54:340
81470,0rcu_preempt3-21ksoftirqd/008:12:400
81470,0rcu_preempt19-21ksoftirqd/107:32:291
167099472,0cyclictest3451-1kworker/1:2H08:52:431
10050470,0irq/346-484840027362-21ssh11:37:090
81460,0rcu_preempt3-21ksoftirqd/010:03:310
81460,0rcu_preempt15746-21ssh11:57:430
167099462,0cyclictest15762-21switchtime07:47:461
167099461,0cyclictest4950-21ping07:37:321
10050460,0irq/346-484840054-21kswapd012:24:290
9950450,0irq/345-48484002417-1kworker/0:0H11:45:030
81450,0rcu_preempt3-21ksoftirqd/008:50:480
81450,0rcu_preempt3-21ksoftirqd/008:22:400
81450,0rcu_preempt3-21ksoftirqd/007:57:210
81450,0rcu_preempt3-21ksoftirqd/007:42:470
81450,0rcu_preempt3-21ksoftirqd/007:09:120
81450,0rcu_preempt3-21ksoftirqd/007:09:120
81450,0rcu_preempt19-21ksoftirqd/108:37:331
81450,0rcu_preempt19-21ksoftirqd/108:37:331
81450,0rcu_preempt19-21ksoftirqd/107:42:251
10050450,0irq/346-484840054-21kswapd011:31:460
81440,0rcu_preempt8664-21diskmemload12:34:500
81440,0rcu_preempt3-21ksoftirqd/009:12:460
81440,0rcu_preempt26068-21kworker/0:108:43:200
10050440,0irq/346-484840054-21kswapd011:19:520
10050440,0irq/346-48484000-21swapper/012:31:440
10050440,0irq/346-48484000-21swapper/011:07:400
81430,0rcu_preempt3-21ksoftirqd/008:33:120
81430,0rcu_preempt19-21ksoftirqd/107:02:381
10050430,0irq/346-484840032133-1kworker/0:3H12:17:300
10050430,0irq/346-48484000-21swapper/009:35:050
81420,0rcu_preempt3-21ksoftirqd/009:05:090
81410,0rcu_preempt3-21ksoftirqd/008:07:410
81410,0rcu_preempt3-21ksoftirqd/007:49:230
81400,0rcu_preempt3-21ksoftirqd/009:01:140
81400,0rcu_preempt3-21ksoftirqd/008:37:530
81400,0rcu_preempt3-21ksoftirqd/008:37:530
81390,0rcu_preempt3-21ksoftirqd/007:53:090
81390,0rcu_preempt17891-21ping08:02:350
81370,0rcu_preempt3-21ksoftirqd/007:17:340
166999372,0cyclictest0-21swapper/008:20:360
81360,0rcu_preempt3-21ksoftirqd/007:27:460
166999363,0cyclictest4950-21ping07:22:320
9950350,0irq/345-48484000-21swapper/007:32:380
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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