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2026-05-19 - 03:22

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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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 Tue May 19, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811080,0rcu_preempt3-21ksoftirqd/022:40:320
81970,0rcu_preempt3-21ksoftirqd/022:51:160
81860,0rcu_preempt3-21ksoftirqd/023:19:110
81860,0rcu_preempt3-21ksoftirqd/020:43:170
81860,0rcu_preempt10756-21kworker/0:020:08:040
81850,0rcu_preempt3-21ksoftirqd/021:38:200
81840,0rcu_preempt3-21ksoftirqd/023:53:190
81840,0rcu_preempt3-21ksoftirqd/020:06:180
81810,0rcu_preempt3-21ksoftirqd/023:32:200
81810,0rcu_preempt3-21ksoftirqd/022:37:140
81810,0rcu_preempt3-21ksoftirqd/022:05:240
81810,0rcu_preempt3-21ksoftirqd/019:50:090
81800,0rcu_preempt7729-21kworker/0:200:34:150
81800,0rcu_preempt3-21ksoftirqd/019:23:300
81800,0rcu_preempt20089-21kworker/0:022:13:260
81800,0rcu_preempt14065-21kworker/0:121:25:590
81800,0rcu_preempt14065-21kworker/0:121:25:590
81790,0rcu_preempt7114-21kworker/0:221:52:580
81790,0rcu_preempt3-21ksoftirqd/020:24:040
81790,0rcu_preempt3-21ksoftirqd/020:16:030
81790,0rcu_preempt3-21ksoftirqd/019:32:590
81790,0rcu_preempt14672-21kworker/0:019:08:200
81780,0rcu_preempt3-21ksoftirqd/021:08:250
81780,0rcu_preempt3-21ksoftirqd/000:10:260
81780,0rcu_preempt2403-21kworker/0:119:54:390
81780,0rcu_preempt21228-21kworker/0:123:43:480
81780,0rcu_preempt17204-21kworker/0:221:13:380
81770,0rcu_preempt654-21kworker/0:123:15:350
81770,0rcu_preempt3-21ksoftirqd/023:11:160
81770,0rcu_preempt3-21ksoftirqd/021:37:400
81770,0rcu_preempt32130-21diskmemload00:14:310
81770,0rcu_preempt32130-21diskmemload00:03:420
81760,0rcu_preempt3-21ksoftirqd/023:41:420
81760,0rcu_preempt3-21ksoftirqd/023:34:400
81760,0rcu_preempt3-21ksoftirqd/023:02:050
81760,0rcu_preempt3-21ksoftirqd/022:43:520
81760,0rcu_preempt3-21ksoftirqd/022:00:290
81760,0rcu_preempt3-21ksoftirqd/020:02:460
81760,0rcu_preempt3-21ksoftirqd/019:43:200
81760,0rcu_preempt3-21ksoftirqd/019:18:090
81750,0rcu_preempt3-21ksoftirqd/023:50:430
81750,0rcu_preempt3-21ksoftirqd/023:04:540
81750,0rcu_preempt3-21ksoftirqd/022:26:150
81750,0rcu_preempt3-21ksoftirqd/022:22:520
81750,0rcu_preempt3-21ksoftirqd/021:49:330
81750,0rcu_preempt3-21ksoftirqd/021:00:260
81750,0rcu_preempt3-21ksoftirqd/020:19:100
81750,0rcu_preempt3-21ksoftirqd/019:13:230
81750,0rcu_preempt3-21ksoftirqd/000:21:320
81750,0rcu_preempt32130-21diskmemload22:08:170
81750,0rcu_preempt32130-21diskmemload21:18:110
81740,0rcu_preempt8690-21kworker/0:000:24:070
81740,0rcu_preempt3-21ksoftirqd/023:23:130
81740,0rcu_preempt3-21ksoftirqd/022:53:130
81740,0rcu_preempt3-21ksoftirqd/021:06:000
81740,0rcu_preempt3-21ksoftirqd/020:57:380
81740,0rcu_preempt3-21ksoftirqd/020:57:380
81740,0rcu_preempt3-21ksoftirqd/020:38:350
81740,0rcu_preempt3-21ksoftirqd/019:42:590
81740,0rcu_preempt3-21ksoftirqd/000:28:080
81730,0rcu_preempt3-21ksoftirqd/021:43:110
81730,0rcu_preempt3-21ksoftirqd/021:31:410
81730,0rcu_preempt3-21ksoftirqd/020:51:130
81730,0rcu_preempt3-21ksoftirqd/020:33:290
81720,0rcu_preempt3-21ksoftirqd/023:58:250
81720,0rcu_preempt3-21ksoftirqd/022:27:590
81700,0rcu_preempt19136-21apt-get20:28:080
81650,0rcu_preempt3-21ksoftirqd/019:33:170
81640,0rcu_preempt19-21ksoftirqd/122:03:151
10050570,0irq/346-484840032130-21diskmemload23:17:261
9950560,0irq/345-48484007044-1kworker/1:0H21:17:221
9950560,0irq/345-484840031111-1kworker/1:0H22:49:401
81560,0rcu_preempt19-21ksoftirqd/120:18:091
10050540,0irq/346-48484002103-21ssh21:09:361
9950530,0irq/345-48484008599-1kworker/1:0H22:55:241
9950530,0irq/345-484840011987-1kworker/1:1H21:21:501
10050530,0irq/346-484840021412-21idleruntime-cro22:02:571
9950520,0irq/345-484840031678-1kworker/1:3H21:41:281
9950520,0irq/345-484840026196-1kworker/1:1H22:41:481
9950520,0irq/345-4848400171rcuc/122:30:491
10050520,0irq/346-484840054-21kswapd022:11:251
9950510,0irq/345-48484009152-1kworker/1:2H21:50:451
9950510,0irq/345-48484007939-1kworker/1:0H00:02:281
9950510,0irq/345-484840027668-1kworker/1:0H00:20:131
9950510,0irq/345-484840018488-1kworker/1:0H23:06:511
9950510,0irq/345-484840015648-1kworker/1:0H23:37:091
9950510,0irq/345-484840013564-1kworker/1:1H23:01:011
10050510,0irq/346-48484000-21swapper/123:29:021
9950490,0irq/345-48484002991-1kworker/1:1H00:04:491
81490,0rcu_preempt19-21ksoftirqd/123:18:141
10050490,0irq/346-484840016308-1kworker/1:1H22:34:411
9950480,0irq/345-48484006400-1kworker/1:1H22:20:511
9950480,0irq/345-484840018488-1kworker/1:0H23:08:431
9950480,0irq/345-48484000-21swapper/123:48:301
9950470,0irq/345-4848400851-21rngd22:13:311
10050470,0irq/346-48484002991-1kworker/1:1H23:55:411
10050470,0irq/346-48484002443-21chrt00:28:001
10050450,0irq/346-484840020172-21munin-node1
10050440,0irq/346-484840054-21kswapd023:23:081
81430,0rcu_preempt3-21ksoftirqd/019:03:160
9950410,0irq/345-48484001438-1kworker/1:2H22:23:451
10050410,0irq/346-484840028458-21ping19:37:301
9950400,0irq/345-484840031111-1kworker/1:0H22:46:081
10050400,0irq/346-48484005269-21ssh21:46:121
10050400,0irq/346-484840019709-21ssh00:12:421
10050400,0irq/346-484840010121-21ssh00:35:191
81390,0rcu_preempt19-21ksoftirqd/121:32:581
10050390,0irq/346-484840030874-21ps00:23:211
10050390,0irq/346-484840028458-21ping19:23:151
10050390,0irq/346-484840014077-1kworker/1:0H21:56:061
10050390,0irq/346-48484001049-21avahi-daemon19:08:081
9950380,0irq/345-484840028458-21ping19:42:581
81380,0rcu_preempt19-21ksoftirqd/119:07:261
10050380,0irq/346-484840026601-21ssh21:34:341
10050380,0irq/346-484840024908-21ssh23:44:171
81370,0rcu_preempt3285-21kworker/1:023:38:101
10050370,0irq/346-484840015530-21ssh21:23:231
10050370,0irq/346-484840015530-21ssh21:23:231
81360,0rcu_preempt10443-1kworker/1:3H20:12:581
10050350,0irq/346-484840010317-21ping19:59:061
317602340,0chrt30169-1kworker/1:0H21:04:091
284182340,0sleep128102-1kworker/1:2H19:17:421
10050340,0irq/346-484840025183-21cyclictest19:43:261
10050340,0irq/346-484840025105-21munin-node1
81330,0rcu_preempt28102-1kworker/1:2H19:18:251
10050330,0irq/346-48484000-21swapper/119:48:291
285462320,0chrt28510-1kworker/1:4H20:55:001
285462320,0chrt28510-1kworker/1:4H20:55:001
270602320,0chrt26869-1kworker/1:0H20:51:391
10050320,0irq/346-48484000-21swapper/120:33:231
9950310,0irq/345-48484000-21swapper/119:53:171
300872310,0chrt28509-1kworker/1:3H20:58:471
156682310,0chrt15359-1kworker/1:1H20:17:491
81300,0rcu_preempt19-21ksoftirqd/119:28:101
2518599303,0cyclictest0-21swapper/120:27:101
81280,0rcu_preempt10317-21ping20:28:131
10050280,0irq/346-484840023522-21sshd20:38:551
10050280,0irq/346-484840010317-21ping20:03:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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