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2026-03-24 - 11:03

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 Mar 24, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81780,0rcu_preempt19-21ksoftirqd/121:10:201
81740,0rcu_preempt19-21ksoftirqd/123:23:141
81740,0rcu_preempt19-21ksoftirqd/100:37:571
81740,0rcu_preempt19-21ksoftirqd/100:32:001
81700,0rcu_preempt19-21ksoftirqd/123:37:581
81700,0rcu_preempt19-21ksoftirqd/123:37:581
81700,0rcu_preempt19-21ksoftirqd/122:35:591
81690,0rcu_preempt19-21ksoftirqd/119:26:511
81670,0rcu_preempt19-21ksoftirqd/123:50:331
10050670,0irq/346-4848400111rcuc/022:39:060
81660,0rcu_preempt19-21ksoftirqd/123:06:491
81640,0rcu_preempt19-21ksoftirqd/121:59:541
81640,0rcu_preempt19-21ksoftirqd/121:59:541
81640,0rcu_preempt19-21ksoftirqd/100:14:141
81630,0rcu_preempt19-21ksoftirqd/100:04:221
81630,0rcu_preempt19-21ksoftirqd/100:00:551
81620,0rcu_preempt19-21ksoftirqd/123:18:511
81620,0rcu_preempt19-21ksoftirqd/122:06:371
10050620,0irq/346-484840021115-1kworker/0:1H21:48:050
9950610,0irq/345-4848400181ktimersoftd/122:48:571
81610,0rcu_preempt19-21ksoftirqd/122:55:341
81610,0rcu_preempt19-21ksoftirqd/121:57:151
81610,0rcu_preempt19-21ksoftirqd/121:42:161
81610,0rcu_preempt19-21ksoftirqd/121:16:111
81610,0rcu_preempt19-21ksoftirqd/120:03:361
81600,0rcu_preempt25370-21kworker/0:119:56:550
81600,0rcu_preempt19-21ksoftirqd/123:44:341
81600,0rcu_preempt19-21ksoftirqd/123:30:011
81600,0rcu_preempt19-21ksoftirqd/122:20:261
81600,0rcu_preempt19-21ksoftirqd/100:26:111
81580,0rcu_preempt3-21ksoftirqd/021:41:270
81580,0rcu_preempt19-21ksoftirqd/123:01:211
81580,0rcu_preempt19-21ksoftirqd/121:31:071
81580,0rcu_preempt19-21ksoftirqd/121:24:071
81580,0rcu_preempt19-21ksoftirqd/100:19:181
81580,0rcu_preempt17175-1kworker/0:2H19:33:530
81560,0rcu_preempt54-21kswapd022:42:161
81540,0rcu_preempt25433-21ping20:14:021
81540,0rcu_preempt19-21ksoftirqd/122:24:081
81530,0rcu_preempt3-21ksoftirqd/023:09:070
81530,0rcu_preempt3-21ksoftirqd/022:18:090
81530,0rcu_preempt3-21ksoftirqd/020:29:030
81530,0rcu_preempt27084-21kworker/0:020:06:310
81530,0rcu_preempt11332-21kworker/0:121:09:070
81520,0rcu_preempt3-21ksoftirqd/022:54:060
81520,0rcu_preempt3-21ksoftirqd/022:24:080
81520,0rcu_preempt3-21ksoftirqd/019:14:190
81520,0rcu_preempt3-21ksoftirqd/019:04:150
10050520,0irq/346-484840016454-1kworker/0:2H23:29:270
81510,0rcu_preempt3-21ksoftirqd/023:24:140
81510,0rcu_preempt26187-21kworker/0:100:36:310
81500,0rcu_preempt3-21ksoftirqd/023:52:260
81500,0rcu_preempt3-21ksoftirqd/023:39:160
81500,0rcu_preempt3-21ksoftirqd/020:27:000
81500,0rcu_preempt22167-21kworker/1:023:09:131
81500,0rcu_preempt19-21ksoftirqd/121:48:151
81500,0rcu_preempt16434-21kworker/0:200:32:140
10050500,0irq/346-48484007028-21if_eth120:39:080
10050500,0irq/346-484840014641-21ssh22:45:460
9950490,0irq/345-48484000-21swapper/021:58:240
81490,0rcu_preempt3-21ksoftirqd/023:14:190
81490,0rcu_preempt3-21ksoftirqd/022:19:190
81490,0rcu_preempt3-21ksoftirqd/022:04:150
81490,0rcu_preempt3-21ksoftirqd/022:01:570
81490,0rcu_preempt3-21ksoftirqd/022:01:570
81490,0rcu_preempt3-21ksoftirqd/020:18:100
81490,0rcu_preempt3-21ksoftirqd/000:09:130
81490,0rcu_preempt22167-21kworker/1:020:04:211
10050490,0irq/346-484840022270-21sshd21:14:160
9950480,0irq/345-484840011184-1kworker/1:0H21:36:081
81480,0rcu_preempt3-21ksoftirqd/022:52:390
81480,0rcu_preempt3-21ksoftirqd/021:31:110
81480,0rcu_preempt3-21ksoftirqd/020:09:120
81480,0rcu_preempt3-21ksoftirqd/019:48:530
81480,0rcu_preempt3-21ksoftirqd/000:14:030
81480,0rcu_preempt27906-21kworker/0:000:23:380
81480,0rcu_preempt19-21ksoftirqd/122:44:061
81480,0rcu_preempt19-21ksoftirqd/120:24:051
81480,0rcu_preempt19-21ksoftirqd/120:12:461
10050480,0irq/346-484840018114-1kworker/0:2H23:59:140
9950470,0irq/345-484840054-21kswapd000:06:100
9950470,0irq/345-48484000-21swapper/022:35:420
81470,0rcu_preempt54-21kswapd019:12:470
81470,0rcu_preempt3-21ksoftirqd/023:37:380
81470,0rcu_preempt3-21ksoftirqd/023:37:380
81470,0rcu_preempt3-21ksoftirqd/023:22:580
81470,0rcu_preempt3-21ksoftirqd/022:12:300
81470,0rcu_preempt3-21ksoftirqd/021:21:240
81470,0rcu_preempt27745-21rm21:53:060
81470,0rcu_preempt19-21ksoftirqd/122:31:241
81470,0rcu_preempt19-21ksoftirqd/120:59:121
81470,0rcu_preempt19-21ksoftirqd/120:20:211
10050470,0irq/346-484840014237-21munin-run19:23:510
10050470,0irq/346-484840012593-21ping19:25:040
81460,0rcu_preempt3-21ksoftirqd/023:44:080
81460,0rcu_preempt3-21ksoftirqd/021:34:540
81460,0rcu_preempt3-21ksoftirqd/020:21:320
81460,0rcu_preempt3-21ksoftirqd/000:24:160
81460,0rcu_preempt19-21ksoftirqd/123:55:171
81460,0rcu_preempt19-21ksoftirqd/123:40:061
81460,0rcu_preempt19-21ksoftirqd/119:44:031
81460,0rcu_preempt19-21ksoftirqd/119:34:271
81450,0rcu_preempt3970-21ntp_states20:29:161
81450,0rcu_preempt19-21ksoftirqd/119:40:561
81450,0rcu_preempt19-21ksoftirqd/119:40:561
81450,0rcu_preempt19-21ksoftirqd/119:31:301
81450,0rcu_preempt19-21ksoftirqd/119:19:581
81450,0rcu_preempt19-21ksoftirqd/119:14:131
10050450,0irq/346-484840011435-21sed20:53:520
81440,0rcu_preempt3-21ksoftirqd/023:53:580
81440,0rcu_preempt3-21ksoftirqd/021:00:100
81440,0rcu_preempt19-21ksoftirqd/123:26:501
81440,0rcu_preempt19-21ksoftirqd/122:17:381
81440,0rcu_preempt19-21ksoftirqd/119:49:031
81440,0rcu_preempt19-21ksoftirqd/100:10:031
10050440,0irq/346-48484000-21swapper/023:04:200
81430,0rcu_preempt3-21ksoftirqd/022:33:330
81430,0rcu_preempt3-21ksoftirqd/020:54:300
81430,0rcu_preempt19-21ksoftirqd/120:39:131
10050430,0irq/346-48484004468-1kworker/0:2H20:44:100
10050430,0irq/346-484840031778-21wget21:24:090
10050430,0irq/346-484840027779-21ssh22:59:180
81420,0rcu_preempt3-21ksoftirqd/021:05:570
81420,0rcu_preempt3-21ksoftirqd/020:37:160
81420,0rcu_preempt19-21ksoftirqd/122:09:041
81420,0rcu_preempt19-21ksoftirqd/121:19:121
81420,0rcu_preempt12593-21ping19:44:040
10050420,0irq/346-484840026058-21ssh19:59:070
81410,0rcu_preempt19-21ksoftirqd/120:44:121
81410,0rcu_preempt19-21ksoftirqd/120:33:521
9950400,0irq/345-48484000-21swapper/019:29:150
81400,0rcu_preempt19-21ksoftirqd/121:49:031
81400,0rcu_preempt19-21ksoftirqd/121:04:051
81400,0rcu_preempt19-21ksoftirqd/119:09:101
81390,0rcu_preempt19-21ksoftirqd/120:49:141
81380,0rcu_preempt19-21ksoftirqd/119:53:531
81380,0rcu_preempt19-21ksoftirqd/119:07:581
81370,0rcu_preempt15877-21kworker/0:119:39:030
81370,0rcu_preempt15877-21kworker/0:119:39:030
81330,0rcu_preempt19-21ksoftirqd/120:54:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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