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2026-03-21 - 01:17

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 Fri Mar 20, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1114699807,0cyclictest14597-21seq07:19:040
10050760,0irq/346-484840030914-1kworker/0:2H11:03:400
81750,0rcu_preempt5735-21ssh09:29:060
10050710,0irq/346-484840054-21kswapd009:39:010
10050700,0irq/346-484840019607-1kworker/0:1H12:00:390
10050700,0irq/346-484840012628-1kworker/0:1H09:38:280
81690,0rcu_preempt3-21ksoftirqd/008:39:160
10050690,0irq/346-484840022872-1kworker/0:3H11:29:590
10050690,0irq/346-484840021127-1kworker/0:2H10:52:110
81680,0rcu_preempt3-21ksoftirqd/009:04:120
81670,0rcu_preempt28770-21ping08:24:110
81660,0rcu_preempt9238-21kworker/u4:208:04:090
81620,0rcu_preempt19-21ksoftirqd/112:22:121
81610,0rcu_preempt3-21ksoftirqd/012:24:210
81610,0rcu_preempt3-21ksoftirqd/012:04:180
81610,0rcu_preempt3-21ksoftirqd/010:09:070
81600,0rcu_preempt3-21ksoftirqd/011:04:150
81600,0rcu_preempt0-21swapper/012:21:090
81590,0rcu_preempt3-21ksoftirqd/010:54:200
81590,0rcu_preempt3-21ksoftirqd/007:54:060
81580,0rcu_preempt19-21ksoftirqd/108:14:071
81570,0rcu_preempt3-21ksoftirqd/011:54:180
81570,0rcu_preempt3-21ksoftirqd/011:09:150
81570,0rcu_preempt3-21ksoftirqd/010:34:540
81570,0rcu_preempt30580-21kworker/0:008:09:120
81570,0rcu_preempt12107-21kworker/0:012:12:130
81560,0rcu_preempt3-21ksoftirqd/011:39:200
81560,0rcu_preempt3-21ksoftirqd/007:15:570
81560,0rcu_preempt24171-21kworker/0:007:59:210
10050560,0irq/346-484840017591-1kworker/1:0H09:40:301
81550,0rcu_preempt9238-21kworker/u4:209:46:430
81550,0rcu_preempt5152-21ssh10:00:570
81550,0rcu_preempt3-21ksoftirqd/009:19:190
81550,0rcu_preempt3-21ksoftirqd/008:59:180
81550,0rcu_preempt3-21ksoftirqd/008:54:170
81550,0rcu_preempt3-21ksoftirqd/008:44:050
81550,0rcu_preempt31951-21munin-node0
81550,0rcu_preempt31951-21munin-node0
81550,0rcu_preempt14428-21ping07:34:060
81550,0rcu_preempt14428-21ping07:34:060
10050550,0irq/346-484840054-21kswapd010:44:141
81540,0rcu_preempt6251-21kworker/0:010:21:240
81540,0rcu_preempt3-21ksoftirqd/011:37:540
81540,0rcu_preempt3-21ksoftirqd/010:26:190
81540,0rcu_preempt3-21ksoftirqd/008:49:210
81540,0rcu_preempt2118-21ssh09:24:300
81530,0rcu_preempt3-21ksoftirqd/011:24:240
81530,0rcu_preempt3-21ksoftirqd/008:19:070
81520,0rcu_preempt3-21ksoftirqd/011:44:090
81520,0rcu_preempt3-21ksoftirqd/009:57:590
81520,0rcu_preempt22618-21runrttasks12:32:380
81520,0rcu_preempt0-21swapper/012:35:280
81510,0rcu_preempt6429-21kworker/0:210:43:570
81510,0rcu_preempt6251-21kworker/0:010:14:040
81510,0rcu_preempt3-21ksoftirqd/011:49:260
81510,0rcu_preempt3-21ksoftirqd/010:41:460
81510,0rcu_preempt3-21ksoftirqd/010:05:400
81510,0rcu_preempt3-21ksoftirqd/009:09:250
81510,0rcu_preempt3-21ksoftirqd/008:14:130
81510,0rcu_preempt19-21ksoftirqd/110:39:211
81510,0rcu_preempt19-21ksoftirqd/110:34:171
81500,0rcu_preempt3-21ksoftirqd/009:15:240
81500,0rcu_preempt3-21ksoftirqd/007:09:180
81500,0rcu_preempt19-21ksoftirqd/107:39:181
10050500,0irq/346-48484001067-21lighttpd12:09:161
81490,0rcu_preempt4367-21apt-get12:14:050
81490,0rcu_preempt3-21ksoftirqd/011:14:480
81490,0rcu_preempt3-21ksoftirqd/009:50:420
81490,0rcu_preempt3-21ksoftirqd/008:37:100
81490,0rcu_preempt19-21ksoftirqd/108:24:061
81490,0rcu_preempt18334-21kworker/0:111:23:110
81480,0rcu_preempt28770-21ping08:29:230
10050480,0irq/346-484840054-21kswapd011:36:391
81470,0rcu_preempt3-21ksoftirqd/007:05:490
81470,0rcu_preempt19-21ksoftirqd/110:49:051
10050470,0irq/346-48484009867-1kworker/1:2H11:50:491
1114699461,0cyclictest21999-21chrt07:39:270
10050460,0irq/346-48484008989-21ssh12:18:541
10050460,0irq/346-48484001637-1kworker/1:1H10:32:071
10050460,0irq/346-48484001637-1kworker/1:1H10:32:071
81450,0rcu_preempt19-21ksoftirqd/112:29:041
81450,0rcu_preempt19-21ksoftirqd/109:49:051
81450,0rcu_preempt19-21ksoftirqd/109:46:231
81450,0rcu_preempt19-21ksoftirqd/107:49:121
81450,0rcu_preempt19-21ksoftirqd/107:44:061
81440,0rcu_preempt3-21ksoftirqd/007:50:430
81440,0rcu_preempt19-21ksoftirqd/111:59:061
81440,0rcu_preempt19-21ksoftirqd/109:36:211
81440,0rcu_preempt19-21ksoftirqd/107:29:261
81430,0rcu_preempt19-21ksoftirqd/109:54:241
81420,0rcu_preempt3-21ksoftirqd/007:24:090
81420,0rcu_preempt29061-21munin-node1
81420,0rcu_preempt19-21ksoftirqd/111:24:051
81420,0rcu_preempt19-21ksoftirqd/111:14:241
81420,0rcu_preempt19-21ksoftirqd/110:18:141
81420,0rcu_preempt19-21ksoftirqd/107:34:061
81420,0rcu_preempt19-21ksoftirqd/107:34:061
81420,0rcu_preempt19-21ksoftirqd/107:28:161
81420,0rcu_preempt19-21ksoftirqd/107:04:121
81420,0rcu_preempt18405-21ssh11:54:211
81420,0rcu_preempt11145-21cyclictest11:04:061
9950410,0irq/345-484840021126-1kworker/1:3H10:55:151
81410,0rcu_preempt3-21ksoftirqd/007:44:140
81410,0rcu_preempt1994-21kworker/0:007:29:270
81410,0rcu_preempt19-21ksoftirqd/112:34:051
81410,0rcu_preempt19-21ksoftirqd/112:04:201
81410,0rcu_preempt19-21ksoftirqd/111:44:271
81410,0rcu_preempt19-21ksoftirqd/111:29:241
81410,0rcu_preempt19-21ksoftirqd/110:59:041
81410,0rcu_preempt19-21ksoftirqd/110:07:051
81410,0rcu_preempt19-21ksoftirqd/109:29:101
81410,0rcu_preempt19-21ksoftirqd/109:12:491
81410,0rcu_preempt19-21ksoftirqd/108:39:041
81410,0rcu_preempt19-21ksoftirqd/108:04:111
81400,0rcu_preempt19-21ksoftirqd/112:26:401
81400,0rcu_preempt19-21ksoftirqd/111:41:251
81400,0rcu_preempt19-21ksoftirqd/111:18:591
81400,0rcu_preempt19-21ksoftirqd/110:24:571
81400,0rcu_preempt19-21ksoftirqd/110:19:041
81400,0rcu_preempt19-21ksoftirqd/109:59:121
81400,0rcu_preempt19-21ksoftirqd/109:14:191
81400,0rcu_preempt19-21ksoftirqd/109:04:061
81400,0rcu_preempt19-21ksoftirqd/108:44:101
81400,0rcu_preempt19-21ksoftirqd/107:59:051
81400,0rcu_preempt19-21ksoftirqd/107:09:051
9950390,0irq/345-48484006364-1kworker/1:2H08:31:121
81390,0rcu_preempt19-21ksoftirqd/110:09:051
81390,0rcu_preempt19-21ksoftirqd/108:09:231
10050390,0irq/346-48484000-21swapper/107:58:551
81380,0rcu_preempt19-21ksoftirqd/109:23:591
81380,0rcu_preempt19-21ksoftirqd/107:19:221
10050380,0irq/346-48484000-21swapper/111:09:231
81370,0rcu_preempt19-21ksoftirqd/108:59:071
81370,0rcu_preempt19-21ksoftirqd/108:58:541
81350,0rcu_preempt19-21ksoftirqd/108:48:551
81350,0rcu_preempt19-21ksoftirqd/108:36:391
10050340,0irq/346-48484000-21swapper/108:19:211
9950300,0irq/345-484840014424-21munin-run07:18:541
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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