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2026-09-12 - 16:55

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 Sat Sep 12, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81870,0rcu_preempt19-21ksoftirqd/109:14:411
81860,0rcu_preempt0-21swapper/111:05:471
81740,0rcu_preempt3583-21kworker/1:011:36:061
81740,0rcu_preempt19-21ksoftirqd/112:03:061
81740,0rcu_preempt19-21ksoftirqd/107:39:211
81720,0rcu_preempt54-21kswapd009:51:101
81720,0rcu_preempt19-21ksoftirqd/107:24:321
81710,0rcu_preempt19-21ksoftirqd/111:34:051
81710,0rcu_preempt19-21ksoftirqd/110:49:281
81700,0rcu_preempt19-21ksoftirqd/112:28:011
81690,0rcu_preempt3-21ksoftirqd/012:38:220
81690,0rcu_preempt3-21ksoftirqd/010:47:500
81690,0rcu_preempt3-21ksoftirqd/009:58:320
81690,0rcu_preempt19-21ksoftirqd/112:15:141
81680,0rcu_preempt3-21ksoftirqd/012:02:300
81660,0rcu_preempt3-21ksoftirqd/012:14:510
81660,0rcu_preempt3-21ksoftirqd/009:48:410
81660,0rcu_preempt19-21ksoftirqd/111:45:011
81660,0rcu_preempt19-21ksoftirqd/110:41:221
81660,0rcu_preempt19-21ksoftirqd/110:31:261
81660,0rcu_preempt19-21ksoftirqd/109:43:331
81660,0rcu_preempt0-21swapper/110:03:151
81640,0rcu_preempt19-21ksoftirqd/109:54:391
209542640,0chrt10050irq/346-484840008:04:200
81630,0rcu_preempt19-21ksoftirqd/111:13:111
81630,0rcu_preempt19-21ksoftirqd/109:31:421
81630,0rcu_preempt19-21ksoftirqd/109:22:221
81620,0rcu_preempt19-21ksoftirqd/111:02:171
81620,0rcu_preempt19-21ksoftirqd/108:06:421
81620,0rcu_preempt0-21swapper/110:24:161
81610,0rcu_preempt19-21ksoftirqd/112:38:401
81610,0rcu_preempt19-21ksoftirqd/112:23:321
81610,0rcu_preempt19-21ksoftirqd/111:58:141
81610,0rcu_preempt19-21ksoftirqd/110:38:131
81600,0rcu_preempt19-21ksoftirqd/112:31:281
81600,0rcu_preempt19-21ksoftirqd/111:50:141
81600,0rcu_preempt19-21ksoftirqd/107:23:081
81600,0rcu_preempt17388-21ssh09:49:190
10050600,0irq/346-484840029245-21ssh12:10:361
10050600,0irq/346-484840010557-21ssh10:47:021
81590,0rcu_preempt3-21ksoftirqd/011:17:270
81590,0rcu_preempt3-21ksoftirqd/008:14:440
81590,0rcu_preempt0-21swapper/112:06:211
10050590,0irq/346-484840017730-21ssh11:26:481
81580,0rcu_preempt3-21ksoftirqd/010:49:340
81580,0rcu_preempt19-21ksoftirqd/108:57:161
81580,0rcu_preempt0-21swapper/009:10:540
81570,0rcu_preempt3-21ksoftirqd/008:49:440
9950560,0irq/345-48484002047-1kworker/0:1H10:06:250
10050560,0irq/346-484840032756-21ssh10:36:460
81550,0rcu_preempt3-21ksoftirqd/012:26:300
81550,0rcu_preempt3-21ksoftirqd/011:20:260
81550,0rcu_preempt3-21ksoftirqd/009:34:440
81550,0rcu_preempt3-21ksoftirqd/008:09:460
81550,0rcu_preempt3-21ksoftirqd/008:09:460
81550,0rcu_preempt19-21ksoftirqd/110:09:441
81550,0rcu_preempt19-21ksoftirqd/110:04:471
81550,0rcu_preempt19-21ksoftirqd/107:45:081
9950540,0irq/345-484840029591-1kworker/0:3H11:08:530
81540,0rcu_preempt3-21ksoftirqd/012:19:330
81540,0rcu_preempt3-21ksoftirqd/011:24:440
81540,0rcu_preempt3-21ksoftirqd/009:59:370
81540,0rcu_preempt3-21ksoftirqd/007:49:340
81540,0rcu_preempt18897-21kworker/0:007:57:330
81530,0rcu_preempt3-21ksoftirqd/011:54:280
81530,0rcu_preempt3-21ksoftirqd/011:49:280
81530,0rcu_preempt3-21ksoftirqd/011:44:310
81530,0rcu_preempt3-21ksoftirqd/010:09:340
81530,0rcu_preempt3-21ksoftirqd/009:39:410
9950520,0irq/345-484840081rcu_preempt10:25:211
9950520,0irq/345-484840081rcu_preempt10:25:211
81520,0rcu_preempt3-21ksoftirqd/010:39:320
81520,0rcu_preempt3-21ksoftirqd/008:01:480
81520,0rcu_preempt10787-21ssh10:14:401
81520,0rcu_preempt10103-21ssh10:14:290
10050520,0irq/346-48484001732-21if_eth207:04:360
81510,0rcu_preempt3-21ksoftirqd/010:24:320
81510,0rcu_preempt3-21ksoftirqd/010:24:320
81510,0rcu_preempt19-21ksoftirqd/107:59:291
10050510,0irq/346-484840031450-21munin-node0
10050510,0irq/346-48484002168-1kworker/0:1H11:12:420
81500,0rcu_preempt3-21ksoftirqd/009:29:390
81500,0rcu_preempt3-21ksoftirqd/009:15:020
81500,0rcu_preempt3-21ksoftirqd/008:54:300
81500,0rcu_preempt3-21ksoftirqd/008:24:200
81500,0rcu_preempt32160-21date12:14:190
81500,0rcu_preempt19692-21kworker/0:009:19:340
81500,0rcu_preempt19-21ksoftirqd/108:20:421
81500,0rcu_preempt0-21swapper/109:04:341
10050500,0irq/346-48484003-21ksoftirqd/011:32:040
81490,0rcu_preempt3-21ksoftirqd/012:08:220
81490,0rcu_preempt3-21ksoftirqd/011:34:460
81490,0rcu_preempt3-21ksoftirqd/009:00:520
81490,0rcu_preempt3-21ksoftirqd/007:14:350
81490,0rcu_preempt19-21ksoftirqd/110:56:291
81490,0rcu_preempt19-21ksoftirqd/108:14:391
81490,0rcu_preempt1333-21lldpd11:39:340
10050490,0irq/346-48484000-21swapper/010:32:330
9950480,0irq/345-48484005248-21df11:14:331
81480,0rcu_preempt3-21ksoftirqd/010:59:370
81480,0rcu_preempt3-21ksoftirqd/009:26:010
81480,0rcu_preempt18834-21ping08:24:491
10050480,0irq/346-48484009192-21runrttasks07:27:480
10050480,0irq/346-48484005195-1kworker/0:2H12:30:240
81470,0rcu_preempt3-21ksoftirqd/010:19:460
81470,0rcu_preempt19-21ksoftirqd/111:42:471
81470,0rcu_preempt19-21ksoftirqd/109:10:111
81470,0rcu_preempt19-21ksoftirqd/107:14:181
10050470,0irq/346-484840054-21kswapd007:36:401
10050470,0irq/346-484840054-21kswapd007:36:401
9950460,0irq/345-48484006061-21ping07:39:200
9950460,0irq/345-48484006061-21ping07:39:200
81460,0rcu_preempt54-21kswapd009:38:071
81460,0rcu_preempt3-21ksoftirqd/008:29:430
81460,0rcu_preempt3-21ksoftirqd/007:09:380
81460,0rcu_preempt19-21ksoftirqd/111:19:421
81460,0rcu_preempt19-21ksoftirqd/109:44:521
81460,0rcu_preempt19-21ksoftirqd/107:54:341
81460,0rcu_preempt18834-21ping08:21:240
9950450,0irq/345-48484000-21swapper/109:28:081
9950450,0irq/345-48484000-21swapper/007:30:520
81450,0rcu_preempt3-21ksoftirqd/010:54:230
81450,0rcu_preempt19-21ksoftirqd/107:29:381
81440,0rcu_preempt7136-21kworker/0:009:06:080
81440,0rcu_preempt32471-21apt-get08:39:290
81440,0rcu_preempt19-21ksoftirqd/108:09:341
81440,0rcu_preempt19-21ksoftirqd/108:09:341
10050440,0irq/346-484840032339-21latency_hist08:39:191
81430,0rcu_preempt6061-21ping07:19:370
81430,0rcu_preempt19-21ksoftirqd/108:49:441
81430,0rcu_preempt19-21ksoftirqd/108:29:391
81420,0rcu_preempt2780-21cyclictest07:49:381
81420,0rcu_preempt2420-21ps08:44:430
81420,0rcu_preempt19-21ksoftirqd/107:14:361
81410,0rcu_preempt6061-21ping07:44:340
9950400,0irq/345-48484006061-21ping07:39:230
81390,0rcu_preempt19-21ksoftirqd/108:59:291
81380,0rcu_preempt19-21ksoftirqd/108:48:231
81380,0rcu_preempt19-21ksoftirqd/108:43:131
81380,0rcu_preempt19-21ksoftirqd/107:05:341
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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