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2026-04-03 - 20:27

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 Apr 03, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811340,0rcu_preempt19-21ksoftirqd/110:07:371
811150,0rcu_preempt19-21ksoftirqd/111:01:191
811060,0rcu_preempt19-21ksoftirqd/112:19:331
811010,0rcu_preempt3-21ksoftirqd/010:19:520
811010,0rcu_preempt19-21ksoftirqd/112:33:421
811010,0rcu_preempt19-21ksoftirqd/110:39:061
81990,0rcu_preempt19-21ksoftirqd/111:48:421
81980,0rcu_preempt19-21ksoftirqd/112:04:061
81970,0rcu_preempt19-21ksoftirqd/110:44:111
81920,0rcu_preempt19-21ksoftirqd/110:54:161
81860,0rcu_preempt19-21ksoftirqd/110:33:381
81830,0rcu_preempt3-21ksoftirqd/011:26:080
81810,0rcu_preempt19-21ksoftirqd/110:25:411
81790,0rcu_preempt29976-21kworker/1:110:17:361
81790,0rcu_preempt29976-21kworker/1:110:17:361
9950780,0irq/345-484840041ktimersoftd/010:29:040
9950770,0irq/345-484840041ktimersoftd/009:24:010
560799777,0cyclictest21821-1kworker/0:0H11:04:170
9950760,0irq/345-4848400111rcuc/009:39:330
81760,0rcu_preempt19-21ksoftirqd/107:42:151
560799743,0cyclictest0-21swapper/012:37:520
9950730,0irq/345-484840041ktimersoftd/011:50:340
9950730,0irq/345-4848400111rcuc/012:33:400
81730,0rcu_preempt11869-21ssh10:13:351
10050730,0irq/346-4848400111rcuc/011:18:540
81720,0rcu_preempt17417-21ssh11:24:081
81710,0rcu_preempt307-21ssh10:01:261
81700,0rcu_preempt19-21ksoftirqd/112:34:301
560799707,0cyclictest26131-1kworker/0:3H12:10:180
10050680,0irq/346-484840041ktimersoftd/011:45:410
10050680,0irq/346-4848400111rcuc/009:35:160
10050680,0irq/346-4848400111rcuc/009:35:160
560799672,0cyclictest5885-21munin-node0
560799666,0cyclictest54-21kswapd009:23:030
560799662,0cyclictest32152-21taskset11:39:090
81650,0rcu_preempt19-21ksoftirqd/111:36:341
81650,0rcu_preempt19-21ksoftirqd/110:21:151
560799651,0cyclictest15609-21apt-get07:38:520
81640,0rcu_preempt19-21ksoftirqd/109:58:221
560799649,0cyclictest10050irq/346-484840010:24:520
560799642,0cyclictest20711-21ssh07:53:550
560799642,0cyclictest20711-21ssh07:53:550
560799641,0cyclictest17056-21ssh10:51:030
10050640,0irq/346-484840041ktimersoftd/011:09:590
9950630,0irq/345-4848400111rcuc/009:09:310
81630,0rcu_preempt851-21rngd12:04:270
560799632,0cyclictest0-21swapper/011:55:240
81620,0rcu_preempt3-21ksoftirqd/009:17:310
81620,0rcu_preempt19-21ksoftirqd/109:23:521
81620,0rcu_preempt19-21ksoftirqd/109:17:331
81620,0rcu_preempt19-21ksoftirqd/109:09:391
560799629,0cyclictest10050irq/346-484840012:00:420
560799626,0cyclictest0-21swapper/008:23:560
560799623,0cyclictest19788-21latency_hist09:48:430
560799622,0cyclictest24287-21munin-node0
560799622,0cyclictest14251-21ssh12:27:070
560799615,0cyclictest4725-1kworker/0:0H10:09:450
560799614,0cyclictest0-21swapper/011:14:540
560799613,0cyclictest0-21swapper/009:59:340
560799612,0cyclictest19545-21df10:53:550
560799612,0cyclictest0-21swapper/010:35:550
5607996112,0cyclictest10050irq/346-484840012:15:020
560799602,0cyclictest9146-21runrttasks10:43:390
560799602,0cyclictest29541-21munin-run09:58:420
81590,0rcu_preempt3-21ksoftirqd/010:44:060
81590,0rcu_preempt19-21ksoftirqd/109:51:521
81590,0rcu_preempt19-21ksoftirqd/107:54:001
81590,0rcu_preempt19-21ksoftirqd/107:54:001
560799592,0cyclictest5544-21ssh10:06:460
560799587,0cyclictest17365-1kworker/0:0H09:46:400
560799586,0cyclictest393-21diskstats09:28:580
560799582,0cyclictest8889-21ping07:28:590
560799582,0cyclictest0-21swapper/011:37:100
81570,0rcu_preempt10050irq/346-484840007:19:140
560799576,0cyclictest1085-21idleruntime-cro08:33:410
560799571,0cyclictest8889-21ping07:38:420
81560,0rcu_preempt19-21ksoftirqd/108:15:431
81560,0rcu_preempt19-21ksoftirqd/108:03:411
560799562,0cyclictest0-21swapper/010:14:460
560799562,0cyclictest0-21swapper/010:14:460
560799561,0cyclictest5725-1kworker/0:1H08:48:530
560799561,0cyclictest5725-1kworker/0:1H08:48:530
560799561,0cyclictest21328-21ssh11:28:420
560799561,0cyclictest21328-21ssh11:28:420
81550,0rcu_preempt19-21ksoftirqd/111:19:071
81540,0rcu_preempt4542-21apt-get08:43:500
81540,0rcu_preempt19-21ksoftirqd/112:12:421
81540,0rcu_preempt19-21ksoftirqd/111:49:541
81540,0rcu_preempt12608-21diskmemload11:08:531
560799542,0cyclictest8889-21ping07:43:530
560799542,0cyclictest0-21swapper/008:04:020
560799542,0cyclictest0-21swapper/007:24:060
81530,0rcu_preempt3-21ksoftirqd/007:13:510
560799521,0cyclictest27082-21apt08:13:500
560799521,0cyclictest26936-21munin-run08:13:420
81510,0rcu_preempt3-21ksoftirqd/008:18:520
81510,0rcu_preempt19-21ksoftirqd/111:29:361
81510,0rcu_preempt19-21ksoftirqd/111:29:361
81510,0rcu_preempt19-21ksoftirqd/109:39:041
81510,0rcu_preempt18403-21kworker/1:108:24:391
560799512,0cyclictest21683-1kworker/0:3H07:58:590
9950500,0irq/345-4848400560899cyclictest11:39:091
81500,0rcu_preempt3-21ksoftirqd/008:38:520
81500,0rcu_preempt18403-21kworker/1:108:07:351
560799502,0cyclictest0-21swapper/008:33:520
81490,0rcu_preempt19-21ksoftirqd/108:09:071
81480,0rcu_preempt19-21ksoftirqd/109:29:021
81480,0rcu_preempt19-21ksoftirqd/108:19:061
81480,0rcu_preempt19-21ksoftirqd/107:30:081
81480,0rcu_preempt18403-21kworker/1:108:29:021
81470,0rcu_preempt3-21ksoftirqd/007:09:100
81470,0rcu_preempt19-21ksoftirqd/112:01:011
5608994710,0cyclictest17337-21runrttasks09:45:361
10050470,0irq/346-4848400560899cyclictest11:55:241
81460,0rcu_preempt4098-21apt-get07:03:510
81460,0rcu_preempt19-21ksoftirqd/107:34:141
81460,0rcu_preempt19-21ksoftirqd/107:03:571
560899469,0cyclictest54-21kswapd010:38:281
9950450,0irq/345-4848400560899cyclictest09:33:541
9950450,0irq/345-4848400560899cyclictest09:33:541
81450,0rcu_preempt3-21ksoftirqd/008:53:570
81450,0rcu_preempt19-21ksoftirqd/112:23:541
9950440,0irq/345-4848400560899cyclictest12:14:061
560899447,0cyclictest8018-21munin-node1
5608994413,0cyclictest12608-21diskmemload09:20:131
5608994412,0cyclictest12608-21diskmemload10:49:401
5608994410,0cyclictest12608-21diskmemload11:17:111
81430,0rcu_preempt3-21ksoftirqd/007:49:030
81430,0rcu_preempt19-21ksoftirqd/111:03:421
81430,0rcu_preempt19-21ksoftirqd/107:27:241
5608994312,0cyclictest18900-21aten_rapower_cu07:48:521
5608994211,0cyclictest1470-21runrttasks08:45:271
81410,0rcu_preempt19-21ksoftirqd/108:48:521
81410,0rcu_preempt19-21ksoftirqd/108:48:521
81400,0rcu_preempt3-21ksoftirqd/009:00:240
81400,0rcu_preempt11118-21munin-node1
560899407,0cyclictest102912chrt07:21:111
81390,0rcu_preempt6419-21ntp_states07:09:051
81380,0rcu_preempt3-21ksoftirqd/009:07:250
81380,0rcu_preempt19-21ksoftirqd/108:39:491
9950370,0irq/345-4848400560899cyclictest08:33:521
81370,0rcu_preempt19-21ksoftirqd/108:59:011
81370,0rcu_preempt19-21ksoftirqd/107:44:141
81360,0rcu_preempt19-21ksoftirqd/107:14:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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