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2026-06-09 - 05:16

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 Jun 09, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81890,0rcu_preempt19-21ksoftirqd/123:09:361
81850,0rcu_preempt19-21ksoftirqd/120:05:201
81820,0rcu_preempt19-21ksoftirqd/100:03:221
81770,0rcu_preempt3-21ksoftirqd/021:50:540
81760,0rcu_preempt3-21ksoftirqd/022:09:310
81730,0rcu_preempt19-21ksoftirqd/120:18:031
81720,0rcu_preempt19-21ksoftirqd/100:27:581
81710,0rcu_preempt23903-21ssh23:54:361
81690,0rcu_preempt22293-21ssh21:41:291
81660,0rcu_preempt19-21ksoftirqd/119:19:401
9950650,0irq/345-4848400181ktimersoftd/100:16:211
81640,0rcu_preempt19-21ksoftirqd/123:40:301
9950630,0irq/345-48484002694-1kworker/1:2H23:00:131
81620,0rcu_preempt19-21ksoftirqd/123:33:031
81610,0rcu_preempt6048-21kworker/0:200:24:000
81610,0rcu_preempt26412-21kworker/u4:122:42:481
81610,0rcu_preempt19-21ksoftirqd/123:58:151
81610,0rcu_preempt19-21ksoftirqd/123:12:461
81600,0rcu_preempt54-21kswapd022:08:031
81600,0rcu_preempt19-21ksoftirqd/122:52:561
81580,0rcu_preempt25389-21kworker/0:000:03:060
81580,0rcu_preempt19-21ksoftirqd/122:47:401
9950570,0irq/345-484840081rcu_preempt23:30:431
9950570,0irq/345-48484003406-1kworker/0:1H21:56:330
9950570,0irq/345-484840011177-1kworker/1:0H21:33:171
9950570,0irq/345-48484000-21swapper/122:03:141
81570,0rcu_preempt19-21ksoftirqd/123:17:451
81570,0rcu_preempt19-21ksoftirqd/100:23:371
10050570,0irq/346-484840017442-1kworker/0:3H21:08:130
10050570,0irq/346-48484000-21swapper/023:45:010
9950560,0irq/345-48484005973-1kworker/1:2H00:12:301
9950560,0irq/345-4848400181ktimersoftd/122:42:281
81560,0rcu_preempt3-21ksoftirqd/023:09:250
81560,0rcu_preempt3-21ksoftirqd/021:22:320
81560,0rcu_preempt30090-21ping20:02:550
81560,0rcu_preempt19-21ksoftirqd/120:09:361
81560,0rcu_preempt13657-21kworker/0:121:41:480
81540,0rcu_preempt3-21ksoftirqd/023:48:590
81540,0rcu_preempt13148-21kworker/0:222:05:310
81540,0rcu_preempt0-21swapper/121:54:411
10050540,0irq/346-484840016392-1kworker/1:2H23:51:141
9950530,0irq/345-484840021686-1kworker/0:1H23:19:260
9950530,0irq/345-48484000-21swapper/121:14:401
81530,0rcu_preempt3-21ksoftirqd/020:18:020
81530,0rcu_preempt3-21ksoftirqd/019:13:040
81530,0rcu_preempt3-21ksoftirqd/000:29:180
81530,0rcu_preempt25389-21kworker/0:022:18:340
81530,0rcu_preempt25389-21kworker/0:022:18:340
81530,0rcu_preempt20239-21kworker/0:123:01:130
81530,0rcu_preempt19-21ksoftirqd/100:33:041
81530,0rcu_preempt0-21swapper/121:58:491
9950520,0irq/345-484840081rcu_preempt00:18:511
81520,0rcu_preempt3-21ksoftirqd/022:12:460
81520,0rcu_preempt3-21ksoftirqd/021:22:480
81520,0rcu_preempt3-21ksoftirqd/021:00:590
81520,0rcu_preempt3-21ksoftirqd/019:08:010
81520,0rcu_preempt31620-21kworker/0:123:30:490
81520,0rcu_preempt19-21ksoftirqd/122:22:321
81520,0rcu_preempt19-21ksoftirqd/122:22:321
9950510,0irq/345-484840081rcu_preempt21:20:101
9950510,0irq/345-48484000-21swapper/023:55:400
9950510,0irq/345-48484000-21swapper/000:21:110
81510,0rcu_preempt3-21ksoftirqd/023:12:510
81510,0rcu_preempt3-21ksoftirqd/022:34:230
81510,0rcu_preempt3-21ksoftirqd/021:28:430
81510,0rcu_preempt0-21swapper/123:05:541
9950500,0irq/345-484840030942-1kworker/1:0H21:50:091
81500,0rcu_preempt860-21kworker/0:220:07:590
81500,0rcu_preempt6048-21kworker/0:200:11:500
81500,0rcu_preempt3-21ksoftirqd/023:02:560
81500,0rcu_preempt3-21ksoftirqd/021:57:540
81500,0rcu_preempt3-21ksoftirqd/021:36:140
81500,0rcu_preempt3-21ksoftirqd/020:17:360
81500,0rcu_preempt19-21ksoftirqd/122:26:511
10050500,0irq/346-484840029289-21idleruntime-cro23:27:371
81490,0rcu_preempt6048-21kworker/0:200:33:320
81490,0rcu_preempt3-21ksoftirqd/021:45:290
81490,0rcu_preempt3-21ksoftirqd/020:00:320
81490,0rcu_preempt19-21ksoftirqd/122:27:541
81490,0rcu_preempt19-21ksoftirqd/120:23:061
81490,0rcu_preempt19-21ksoftirqd/120:13:001
10050490,0irq/346-484840028477-21ssh23:59:040
9950480,0irq/345-48484000-21swapper/121:45:571
81480,0rcu_preempt9463-21ssh21:28:031
81480,0rcu_preempt3-21ksoftirqd/022:24:460
81480,0rcu_preempt3-21ksoftirqd/019:42:560
81480,0rcu_preempt3-21ksoftirqd/019:42:560
81480,0rcu_preempt19-21ksoftirqd/119:54:341
10050480,0irq/346-484840054-21kswapd022:44:120
10050480,0irq/346-48484000-21swapper/022:51:120
9950470,0irq/345-48484007195-21diskstats23:37:530
81470,0rcu_preempt3-21ksoftirqd/022:56:250
81470,0rcu_preempt3-21ksoftirqd/022:39:440
81470,0rcu_preempt3-21ksoftirqd/021:13:040
81470,0rcu_preempt3-21ksoftirqd/019:48:020
81470,0rcu_preempt3-21ksoftirqd/000:16:110
81470,0rcu_preempt19-21ksoftirqd/119:58:041
10050470,0irq/346-484840017307-21ping19:37:500
9950460,0irq/345-48484000-21swapper/121:09:081
81460,0rcu_preempt3-21ksoftirqd/023:33:210
81460,0rcu_preempt3-21ksoftirqd/019:56:250
81460,0rcu_preempt19-21ksoftirqd/122:33:051
81460,0rcu_preempt19-21ksoftirqd/119:29:511
81460,0rcu_preempt19-21ksoftirqd/119:23:171
1599460,0migration/022186-21taskset19:32:240
10050460,0irq/346-48484000-21swapper/020:23:080
9950450,0irq/345-484840017307-21ping19:32:530
81450,0rcu_preempt3-21ksoftirqd/022:27:560
81450,0rcu_preempt3-21ksoftirqd/020:48:040
81450,0rcu_preempt19-21ksoftirqd/119:43:231
81450,0rcu_preempt19-21ksoftirqd/119:43:231
81450,0rcu_preempt19-21ksoftirqd/119:36:001
1599450,0migration/018881-21taskset19:21:550
138682450,0sleep010394-1kworker/0:2H19:06:170
10050450,0irq/346-484840021686-1kworker/0:1H23:23:100
9950440,0irq/345-48484000-21swapper/123:43:011
81440,0rcu_preempt18361-21kworker/0:121:02:480
81430,0rcu_preempt19-21ksoftirqd/121:03:021
10050430,0irq/346-48484009870-21runrttasks20:32:550
81420,0rcu_preempt3-21ksoftirqd/020:52:530
81420,0rcu_preempt3-21ksoftirqd/020:39:360
81420,0rcu_preempt19-21ksoftirqd/120:37:511
81420,0rcu_preempt19-21ksoftirqd/119:37:531
81410,0rcu_preempt3-21ksoftirqd/020:43:490
81410,0rcu_preempt19-21ksoftirqd/121:22:381
81410,0rcu_preempt19-21ksoftirqd/120:52:561
81410,0rcu_preempt19-21ksoftirqd/119:47:571
10050410,0irq/346-48484008902-21ls20:28:030
9950400,0irq/345-484840018162-1kworker/1:3H22:14:161
81390,0rcu_preempt19-21ksoftirqd/120:33:061
81390,0rcu_preempt19-21ksoftirqd/119:12:561
81380,0rcu_preempt19-21ksoftirqd/120:57:501
81380,0rcu_preempt19-21ksoftirqd/120:43:031
81380,0rcu_preempt19-21ksoftirqd/120:27:581
81380,0rcu_preempt19-21ksoftirqd/119:03:011
81370,0rcu_preempt3-21ksoftirqd/019:23:130
81370,0rcu_preempt19-21ksoftirqd/120:50:391
81370,0rcu_preempt19-21ksoftirqd/119:09:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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