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2026-09-24 - 07:39

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Thu Sep 24, 2026 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811390,0rcu_preempt28014-21ping19:30:320
811250,0rcu_preempt3-21ksoftirqd/022:55:120
811150,0rcu_preempt3-21ksoftirqd/022:35:010
811130,0rcu_preempt3-21ksoftirqd/020:20:010
811050,0rcu_preempt19-21ksoftirqd/119:40:001
811040,0rcu_preempt3-21ksoftirqd/021:55:150
811030,0rcu_preempt3-21ksoftirqd/021:20:000
81900,0rcu_preempt3-21ksoftirqd/023:54:380
81900,0rcu_preempt3-21ksoftirqd/023:54:380
81880,0rcu_preempt3-21ksoftirqd/021:28:470
81880,0rcu_preempt3-21ksoftirqd/000:35:250
81830,0rcu_preempt3-21ksoftirqd/000:04:400
81800,0rcu_preempt956-21avahi-daemon23:54:591
81800,0rcu_preempt956-21avahi-daemon23:54:591
81800,0rcu_preempt3-21ksoftirqd/022:40:090
81770,0rcu_preempt3-21ksoftirqd/023:45:250
81770,0rcu_preempt3-21ksoftirqd/020:45:260
81770,0rcu_preempt19-21ksoftirqd/119:35:011
81700,0rcu_preempt3-21ksoftirqd/023:34:190
81700,0rcu_preempt19-21ksoftirqd/121:35:111
81690,0rcu_preempt19-21ksoftirqd/119:40:051
81680,0rcu_preempt3-21ksoftirqd/023:22:480
81680,0rcu_preempt3-21ksoftirqd/022:00:200
81670,0rcu_preempt19-21ksoftirqd/122:40:011
81660,0rcu_preempt3-21ksoftirqd/023:00:130
81650,0rcu_preempt3-21ksoftirqd/000:32:140
81640,0rcu_preempt19-21ksoftirqd/122:40:021
81630,0rcu_preempt11479-1kworker/1:1H00:33:401
81620,0rcu_preempt758-21rngd22:07:511
81620,0rcu_preempt3-21ksoftirqd/021:35:260
81610,0rcu_preempt3-21ksoftirqd/023:10:070
81600,0rcu_preempt3-21ksoftirqd/022:50:170
81600,0rcu_preempt3-21ksoftirqd/020:05:220
81590,0rcu_preempt19-21ksoftirqd/122:50:161
10050590,0irq/346-484840020595-21munin-node0
81580,0rcu_preempt3-21ksoftirqd/022:09:560
81580,0rcu_preempt3-21ksoftirqd/000:05:250
81570,0rcu_preempt3-21ksoftirqd/020:00:150
81570,0rcu_preempt19-21ksoftirqd/120:01:351
10050570,0irq/346-48484004619-1kworker/0:0H23:06:070
81560,0rcu_preempt8459-1kworker/1:1H22:21:491
81550,0rcu_preempt6940-21ssh23:55:290
81550,0rcu_preempt3-21ksoftirqd/020:45:000
81550,0rcu_preempt3-21ksoftirqd/000:20:100
81540,0rcu_preempt19-21ksoftirqd/100:20:041
81530,0rcu_preempt3-21ksoftirqd/022:33:170
10050530,0irq/346-48484009312-21ssh23:25:550
81520,0rcu_preempt3-21ksoftirqd/021:48:500
81520,0rcu_preempt3-21ksoftirqd/000:25:310
81520,0rcu_preempt19-21ksoftirqd/121:41:401
295482520,0chrt10050irq/346-484840019:23:490
81510,0rcu_preempt3-21ksoftirqd/022:14:410
81510,0rcu_preempt3-21ksoftirqd/019:08:200
10050510,0irq/346-48484000-21swapper/021:22:420
81500,0rcu_preempt7240-21apt-get19:55:110
81500,0rcu_preempt3-21ksoftirqd/020:10:250
10050500,0irq/346-484840030239-1kworker/0:2H21:40:170
10050500,0irq/346-48484000-21swapper/022:17:330
10050490,0irq/346-484840031395-1kworker/0:1H21:10:580
10050490,0irq/346-484840029198-1kworker/0:2H22:49:120
81480,0rcu_preempt19-21ksoftirqd/123:05:001
81480,0rcu_preempt19-21ksoftirqd/121:55:111
10050480,0irq/346-484840015192-21ssh22:28:370
10050480,0irq/346-484840010779-21ssh22:24:290
10050480,0irq/346-48484000-21swapper/023:41:240
81470,0rcu_preempt5619-1kworker/1:2H00:40:011
10050470,0irq/346-48484003-21ksoftirqd/019:40:010
10050470,0irq/346-484840028930-21ssh00:17:360
10050470,0irq/346-484840023582-1kworker/0:0H00:12:140
9950460,0irq/345-48484000-21swapper/021:51:180
10050460,0irq/346-48484000-21swapper/023:36:000
9950450,0irq/345-484840029973-21apt-get23:15:120
81450,0rcu_preempt3-21ksoftirqd/019:50:190
81450,0rcu_preempt20235-21kworker/1:223:12:441
10050450,0irq/346-484840028014-21ping19:25:180
10050450,0irq/346-48484000-21swapper/021:00:200
9950440,0irq/345-484840031396-1kworker/1:3H21:23:421
81440,0rcu_preempt3-21ksoftirqd/020:55:240
81440,0rcu_preempt19-21ksoftirqd/100:16:101
81440,0rcu_preempt19-21ksoftirqd/100:10:171
10050440,0irq/346-484840025552-21mktemp20:50:190
81430,0rcu_preempt19-21ksoftirqd/123:45:111
81430,0rcu_preempt19-21ksoftirqd/122:25:191
81430,0rcu_preempt19-21ksoftirqd/122:15:311
81430,0rcu_preempt19-21ksoftirqd/121:16:151
81430,0rcu_preempt19-21ksoftirqd/119:05:271
1599430,0migration/020597-21munin-node0
10050430,0irq/346-484840026287-21runrttasks19:14:160
81410,0rcu_preempt19-21ksoftirqd/123:32:251
302052410,0chrt26462-1kworker/0:0H21:05:010
302052410,0chrt26462-1kworker/0:0H21:05:010
10050410,0irq/346-48484005353-21ssh21:46:511
10050410,0irq/346-48484004408-21if_eth119:45:250
9950400,0irq/345-484840028014-21ping19:40:070
81400,0rcu_preempt3-21ksoftirqd/020:25:200
81400,0rcu_preempt19-21ksoftirqd/123:20:081
9950390,0irq/345-48484000-21swapper/020:30:160
81390,0rcu_preempt3-21ksoftirqd/019:15:230
81390,0rcu_preempt19-21ksoftirqd/122:56:011
81390,0rcu_preempt19-21ksoftirqd/121:30:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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