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2026-01-11 - 04:46

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 Sun Jan 11, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811230,0rcu_preempt19-21ksoftirqd/123:50:371
811230,0rcu_preempt14820-21ssh21:55:461
81740,0rcu_preempt3-21ksoftirqd/020:00:190
10050670,0irq/346-48484000-21swapper/022:17:560
11272660,0chrt9950irq/345-484840021:42:110
11272660,0chrt9950irq/345-484840021:42:110
10050660,0irq/346-48484000-21swapper/021:28:200
81640,0rcu_preempt19-21ksoftirqd/119:35:261
81640,0rcu_preempt15655-21kworker/1:100:34:071
81630,0rcu_preempt19-21ksoftirqd/123:45:151
81630,0rcu_preempt19-21ksoftirqd/121:42:421
81630,0rcu_preempt19-21ksoftirqd/121:42:421
81630,0rcu_preempt19-21ksoftirqd/121:21:521
10050630,0irq/346-48484000-21swapper/023:07:400
81620,0rcu_preempt851-21rngd00:28:120
81620,0rcu_preempt19-21ksoftirqd/122:40:021
81610,0rcu_preempt29245-21memory20:55:200
81610,0rcu_preempt19-21ksoftirqd/121:19:551
81610,0rcu_preempt19-21ksoftirqd/100:02:251
81600,0rcu_preempt19-21ksoftirqd/123:32:021
81600,0rcu_preempt19-21ksoftirqd/121:51:481
81600,0rcu_preempt19-21ksoftirqd/121:12:331
81600,0rcu_preempt19-21ksoftirqd/100:29:291
81590,0rcu_preempt3-21ksoftirqd/023:35:090
81590,0rcu_preempt19-21ksoftirqd/123:07:471
81590,0rcu_preempt19-21ksoftirqd/122:32:261
81590,0rcu_preempt19-21ksoftirqd/121:45:171
81590,0rcu_preempt19-21ksoftirqd/119:25:291
81590,0rcu_preempt0-21swapper/122:58:251
81580,0rcu_preempt19-21ksoftirqd/122:11:181
81580,0rcu_preempt19-21ksoftirqd/121:37:031
81580,0rcu_preempt19-21ksoftirqd/120:05:051
81570,0rcu_preempt19-21ksoftirqd/123:26:471
81570,0rcu_preempt19-21ksoftirqd/123:22:001
81570,0rcu_preempt15655-21kworker/1:123:35:081
81560,0rcu_preempt8007-21kworker/0:121:17:070
81560,0rcu_preempt3-21ksoftirqd/000:35:100
81560,0rcu_preempt3-21ksoftirqd/000:20:100
81560,0rcu_preempt19-21ksoftirqd/122:17:321
10050560,0irq/346-4848400851-21rngd21:23:260
81550,0rcu_preempt3-21ksoftirqd/023:45:270
81550,0rcu_preempt3-21ksoftirqd/021:10:090
81540,0rcu_preempt3-21ksoftirqd/023:30:000
81540,0rcu_preempt3-21ksoftirqd/021:30:280
81540,0rcu_preempt16967-21kworker/0:122:40:210
10050540,0irq/346-48484002835-1kworker/1:0H22:35:351
10050540,0irq/346-484840024641-1kworker/1:2H23:12:291
10050540,0irq/346-484840021724-1kworker/1:2H00:16:111
10050540,0irq/346-48484000-21swapper/022:03:310
9950530,0irq/345-484840019-21ksoftirqd/100:20:041
81530,0rcu_preempt3-21ksoftirqd/023:50:230
81530,0rcu_preempt3-21ksoftirqd/023:40:260
81530,0rcu_preempt3-21ksoftirqd/023:40:260
81530,0rcu_preempt3-21ksoftirqd/020:10:120
10050530,0irq/346-4848400851-21rngd21:39:570
10050530,0irq/346-48484004102-1kworker/1:1H23:57:501
81520,0rcu_preempt3-21ksoftirqd/020:40:220
81520,0rcu_preempt3-21ksoftirqd/020:30:220
81520,0rcu_preempt3-21ksoftirqd/019:50:220
81520,0rcu_preempt19-21ksoftirqd/120:00:301
10050520,0irq/346-48484009048-1kworker/1:3H00:05:031
10050520,0irq/346-4848400851-21rngd22:56:450
10050520,0irq/346-484840018252-1kworker/1:1H21:30:411
10050520,0irq/346-484840016387-21ssh00:10:021
81510,0rcu_preempt3-21ksoftirqd/023:55:150
81510,0rcu_preempt3-21ksoftirqd/022:08:460
81510,0rcu_preempt3-21ksoftirqd/020:19:370
81510,0rcu_preempt28665-21apt-get20:55:091
10050510,0irq/346-48484004959-1kworker/0:3H22:53:300
10050510,0irq/346-484840032425-1kworker/1:1H22:50:231
10050510,0irq/346-484840029539-1kworker/1:0H23:18:481
10050510,0irq/346-484840029539-1kworker/1:0H23:18:481
10050510,0irq/346-484840022159-21ssh23:42:321
10050510,0irq/346-484840022159-21ssh23:42:321
81500,0rcu_preempt3-21ksoftirqd/023:25:150
81500,0rcu_preempt3-21ksoftirqd/023:00:080
81500,0rcu_preempt3-21ksoftirqd/022:24:050
81500,0rcu_preempt3-21ksoftirqd/020:45:060
81500,0rcu_preempt3-21ksoftirqd/019:55:230
81500,0rcu_preempt3-21ksoftirqd/000:11:360
81500,0rcu_preempt19-21ksoftirqd/120:20:281
81500,0rcu_preempt19-21ksoftirqd/120:20:281
81500,0rcu_preempt19-21ksoftirqd/120:10:191
81500,0rcu_preempt19-21ksoftirqd/119:20:091
10050500,0irq/346-484840021611-21ssh22:35:340
81490,0rcu_preempt3-21ksoftirqd/022:30:170
81490,0rcu_preempt3-21ksoftirqd/021:51:020
81490,0rcu_preempt3-21ksoftirqd/020:06:500
81490,0rcu_preempt3-21ksoftirqd/000:15:170
81490,0rcu_preempt3-21ksoftirqd/000:00:180
81490,0rcu_preempt28320-21kworker/0:021:05:100
81490,0rcu_preempt24846-21apt-get19:05:090
81490,0rcu_preempt19-21ksoftirqd/120:25:171
81490,0rcu_preempt16777-21kworker/0:120:22:020
81490,0rcu_preempt16777-21kworker/0:120:22:020
10050490,0irq/346-484840018222-1kworker/0:3H22:26:100
81480,0rcu_preempt3-21ksoftirqd/000:30:290
81480,0rcu_preempt3-21ksoftirqd/000:05:180
10050480,0irq/346-484840032425-1kworker/1:1H22:48:221
10050480,0irq/346-484840029644-21ping19:30:250
10050480,0irq/346-484840019203-21ssh21:27:511
10050480,0irq/346-484840012689-1kworker/1:1H22:26:491
10050480,0irq/346-48484000-21swapper/022:14:570
9950470,0irq/345-48484000-21swapper/119:40:181
81470,0rcu_preempt5745-21kworker/0:123:12:110
81470,0rcu_preempt3-21ksoftirqd/020:51:380
81470,0rcu_preempt3-21ksoftirqd/020:25:240
81470,0rcu_preempt19-21ksoftirqd/122:07:111
81470,0rcu_preempt19-21ksoftirqd/120:35:091
81470,0rcu_preempt19-21ksoftirqd/120:15:321
81470,0rcu_preempt19-21ksoftirqd/100:35:161
81470,0rcu_preempt14840-21kworker/0:119:49:570
10050470,0irq/346-484840031820-21munin-plugin-st21:04:590
10050470,0irq/346-48484000-21swapper/021:46:450
81460,0rcu_preempt5535-21ssh22:20:081
81460,0rcu_preempt3-21ksoftirqd/023:20:300
81460,0rcu_preempt3-21ksoftirqd/022:49:560
81460,0rcu_preempt3-21ksoftirqd/020:35:180
81460,0rcu_preempt1339-21snmpd19:34:581
308922460,0chrt10050irq/346-484840019:20:430
10050460,0irq/346-48484000-21swapper/023:15:310
10050460,0irq/346-48484000-21swapper/023:15:310
81450,0rcu_preempt3-21ksoftirqd/021:56:530
81450,0rcu_preempt19-21ksoftirqd/123:00:161
81450,0rcu_preempt19-21ksoftirqd/119:10:201
9950440,0irq/345-484840029644-21ping19:39:280
81440,0rcu_preempt19-21ksoftirqd/119:50:161
81430,0rcu_preempt3-21ksoftirqd/019:15:230
81430,0rcu_preempt3-21ksoftirqd/019:14:590
10050430,0irq/346-48484005668-1kworker/1:1H22:00:111
10050430,0irq/346-484840029644-21ping19:40:240
81420,0rcu_preempt19-21ksoftirqd/121:00:121
81420,0rcu_preempt19-21ksoftirqd/120:40:241
81420,0rcu_preempt0-21swapper/119:55:251
2635699421,0cyclictest29644-21ping19:27:170
81410,0rcu_preempt29644-21ping19:45:101
81410,0rcu_preempt19-21ksoftirqd/121:05:181
81410,0rcu_preempt19-21ksoftirqd/120:48:481
81410,0rcu_preempt19-21ksoftirqd/119:19:591
81400,0rcu_preempt19-21ksoftirqd/120:30:141
81380,0rcu_preempt19-21ksoftirqd/119:05:561
81370,0rcu_preempt19-21ksoftirqd/120:54:341
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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