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2026-04-01 - 20:37

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 792 highest latencies:
System rackaslot5s.osadl.org (updated Wed Apr 01, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811080,0rcu_preempt3-21ksoftirqd/012:16:320
811010,0rcu_preempt21378-1kworker/1:1H12:35:471
81950,0rcu_preempt19-21ksoftirqd/110:53:001
81820,0rcu_preempt851-21rngd10:20:111
81800,0rcu_preempt29382-21kworker/1:211:57:221
81790,0rcu_preempt19-21ksoftirqd/111:03:581
81780,0rcu_preempt19-21ksoftirqd/112:31:471
81740,0rcu_preempt3-21ksoftirqd/010:20:190
81740,0rcu_preempt19-21ksoftirqd/109:51:171
81730,0rcu_preempt19-21ksoftirqd/110:31:441
81720,0rcu_preempt3-21ksoftirqd/012:23:540
81700,0rcu_preempt19-21ksoftirqd/110:53:471
81690,0rcu_preempt3-21ksoftirqd/010:29:070
81680,0rcu_preempt19-21ksoftirqd/110:37:571
81680,0rcu_preempt19-21ksoftirqd/109:28:301
81670,0rcu_preempt19-21ksoftirqd/110:14:491
81650,0rcu_preempt19-21ksoftirqd/112:03:561
81630,0rcu_preempt3-21ksoftirqd/008:23:560
81630,0rcu_preempt19-21ksoftirqd/110:39:031
81630,0rcu_preempt19-21ksoftirqd/110:27:321
81620,0rcu_preempt9470-21kworker/0:211:24:040
81620,0rcu_preempt19-21ksoftirqd/109:19:301
81610,0rcu_preempt19-21ksoftirqd/110:44:031
9950600,0irq/345-4848400171rcuc/111:35:181
81590,0rcu_preempt19-21ksoftirqd/111:21:071
81590,0rcu_preempt19-21ksoftirqd/109:41:051
81590,0rcu_preempt19-21ksoftirqd/109:41:051
9950580,0irq/345-4848400171rcuc/112:17:021
81580,0rcu_preempt3-21ksoftirqd/010:43:440
81580,0rcu_preempt19-21ksoftirqd/111:41:361
81580,0rcu_preempt19-21ksoftirqd/109:17:331
81570,0rcu_preempt3745-21kworker/0:009:19:490
81570,0rcu_preempt19-21ksoftirqd/112:08:591
81560,0rcu_preempt3-21ksoftirqd/011:38:540
81560,0rcu_preempt19-21ksoftirqd/110:59:241
9950550,0irq/345-4848400181ktimersoftd/108:23:431
81550,0rcu_preempt9470-21kworker/0:211:23:210
81550,0rcu_preempt8915-21apt-get09:03:530
81550,0rcu_preempt3-21ksoftirqd/007:58:430
81550,0rcu_preempt19-21ksoftirqd/111:47:301
81550,0rcu_preempt1470-21runrttasks07:13:551
9950540,0irq/345-484840019-21ksoftirqd/109:57:061
9950540,0irq/345-4848400171rcuc/110:04:131
81540,0rcu_preempt3-21ksoftirqd/011:49:080
81540,0rcu_preempt3-21ksoftirqd/009:49:000
81540,0rcu_preempt3-21ksoftirqd/008:04:100
81540,0rcu_preempt3-21ksoftirqd/008:00:140
10050540,0irq/346-48484008397-1kworker/0:3H09:11:190
9950530,0irq/345-4848400171rcuc/111:27:111
81530,0rcu_preempt3987-21apt-get08:48:530
81530,0rcu_preempt3-21ksoftirqd/012:02:360
81530,0rcu_preempt3-21ksoftirqd/009:14:070
9950520,0irq/345-4848400181ktimersoftd/109:30:271
81520,0rcu_preempt54-21kswapd012:12:310
81520,0rcu_preempt3-21ksoftirqd/012:08:380
81520,0rcu_preempt3-21ksoftirqd/011:53:560
81520,0rcu_preempt3-21ksoftirqd/009:58:550
81520,0rcu_preempt1051-21kworker/0:111:11:510
10050520,0irq/346-484840022987-1kworker/0:1H09:56:020
9950510,0irq/345-4848400181ktimersoftd/110:09:541
81510,0rcu_preempt3-21ksoftirqd/010:59:090
81510,0rcu_preempt3-21ksoftirqd/010:09:100
81510,0rcu_preempt3-21ksoftirqd/009:34:030
81510,0rcu_preempt3-21ksoftirqd/008:09:000
81510,0rcu_preempt3-21ksoftirqd/007:16:330
81510,0rcu_preempt19-21ksoftirqd/109:36:521
81510,0rcu_preempt19-21ksoftirqd/108:14:041
81510,0rcu_preempt19-21ksoftirqd/108:04:131
81510,0rcu_preempt19-21ksoftirqd/107:59:061
10050510,0irq/346-484840028322-1kworker/0:0H09:26:300
9950500,0irq/345-484840081rcu_preempt12:22:551
9950500,0irq/345-4848400181ktimersoftd/111:30:281
9950500,0irq/345-4848400171rcuc/109:12:561
81500,0rcu_preempt3-21ksoftirqd/012:29:080
81500,0rcu_preempt3-21ksoftirqd/011:04:130
81500,0rcu_preempt3-21ksoftirqd/010:14:050
81500,0rcu_preempt3-21ksoftirqd/009:44:140
81500,0rcu_preempt3-21ksoftirqd/009:29:020
81500,0rcu_preempt3-21ksoftirqd/008:15:030
81500,0rcu_preempt3-21ksoftirqd/007:03:550
81500,0rcu_preempt27211-21kworker/0:109:03:220
81500,0rcu_preempt27211-21kworker/0:109:03:220
9950490,0irq/345-48484001545-21ssh11:09:161
81490,0rcu_preempt3-21ksoftirqd/012:19:110
81490,0rcu_preempt3-21ksoftirqd/011:33:560
81490,0rcu_preempt3-21ksoftirqd/011:29:050
81490,0rcu_preempt3-21ksoftirqd/010:48:440
9950480,0irq/345-4848400181ktimersoftd/112:03:431
81480,0rcu_preempt3-21ksoftirqd/011:14:060
81480,0rcu_preempt3-21ksoftirqd/010:56:380
81480,0rcu_preempt3-21ksoftirqd/008:29:110
81480,0rcu_preempt3-21ksoftirqd/008:20:050
81480,0rcu_preempt29382-21kworker/1:209:44:001
81480,0rcu_preempt2600-21kworker/0:311:44:050
81480,0rcu_preempt19-21ksoftirqd/108:28:551
81480,0rcu_preempt19-21ksoftirqd/108:09:101
81470,0rcu_preempt6698-21ping07:29:151
81470,0rcu_preempt3-21ksoftirqd/010:43:290
81470,0rcu_preempt3-21ksoftirqd/010:04:100
81470,0rcu_preempt3-21ksoftirqd/008:53:550
81470,0rcu_preempt19-21ksoftirqd/108:24:041
81470,0rcu_preempt19-21ksoftirqd/107:34:131
9950460,0irq/345-48484000-21swapper/012:33:540
9950460,0irq/345-48484000-21swapper/010:26:390
81460,0rcu_preempt6698-21ping07:38:590
81460,0rcu_preempt3-21ksoftirqd/010:34:070
81450,0rcu_preempt3-21ksoftirqd/009:39:000
81450,0rcu_preempt3-21ksoftirqd/009:39:000
81450,0rcu_preempt3-21ksoftirqd/007:46:200
81450,0rcu_preempt31454-21apt-get08:33:550
81450,0rcu_preempt31454-21apt-get08:33:550
81450,0rcu_preempt19-21ksoftirqd/107:44:411
81450,0rcu_preempt1738-21users08:39:090
81440,0rcu_preempt3-21ksoftirqd/007:12:540
81440,0rcu_preempt19-21ksoftirqd/112:24:001
81440,0rcu_preempt19-21ksoftirqd/110:02:031
81440,0rcu_preempt19-21ksoftirqd/107:39:111
81430,0rcu_preempt3-21ksoftirqd/007:48:540
81420,0rcu_preempt3-21ksoftirqd/008:44:100
81420,0rcu_preempt19-21ksoftirqd/108:38:571
81420,0rcu_preempt19-21ksoftirqd/107:57:121
81420,0rcu_preempt19-21ksoftirqd/107:28:261
81420,0rcu_preempt19-21ksoftirqd/107:19:141
81420,0rcu_preempt19-21ksoftirqd/107:09:031
81410,0rcu_preempt19-21ksoftirqd/111:14:101
81410,0rcu_preempt19-21ksoftirqd/108:49:031
9950400,0irq/345-48484000-21swapper/007:33:440
81400,0rcu_preempt3-21ksoftirqd/007:28:440
81400,0rcu_preempt19-21ksoftirqd/111:50:111
81400,0rcu_preempt19-21ksoftirqd/109:02:281
81400,0rcu_preempt19-21ksoftirqd/109:02:281
81400,0rcu_preempt19-21ksoftirqd/107:48:541
81390,0rcu_preempt19-21ksoftirqd/109:04:101
81380,0rcu_preempt19-21ksoftirqd/107:07:231
81370,0rcu_preempt19-21ksoftirqd/108:34:101
81370,0rcu_preempt19-21ksoftirqd/108:34:101
341499378,0cyclictest0-21swapper/007:34:120
81360,0rcu_preempt19-21ksoftirqd/108:44:101
341499363,0cyclictest0-21swapper/007:19:420
81340,0rcu_preempt19-21ksoftirqd/108:54:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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