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2026-03-30 - 03:55

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 Mon Mar 30, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811410,0rcu_preempt20620-21ssh00:03:580
811280,0rcu_preempt3-21ksoftirqd/000:19:120
811240,0rcu_preempt3-21ksoftirqd/022:36:080
811080,0rcu_preempt3-21ksoftirqd/022:47:220
81780,0rcu_preempt3-21ksoftirqd/000:29:060
81780,0rcu_preempt3-21ksoftirqd/000:12:440
81770,0rcu_preempt54-21kswapd000:37:200
81720,0rcu_preempt3-21ksoftirqd/023:53:250
10050720,0irq/346-484840054-21kswapd023:36:120
10050710,0irq/346-484840030959-1kworker/0:0H22:39:580
10050710,0irq/346-484840030959-1kworker/0:0H22:39:580
10050710,0irq/346-484840021064-1kworker/0:0H22:25:430
10050700,0irq/346-484840010494-1kworker/0:0H00:25:590
81690,0rcu_preempt3-21ksoftirqd/023:39:370
10050690,0irq/346-484840016154-1kworker/0:3H22:20:340
10050680,0irq/346-484840032185-1kworker/0:1H00:16:060
10050670,0irq/346-48484000-21swapper/023:45:400
81660,0rcu_preempt0-21swapper/100:31:441
9950650,0irq/345-4848400171rcuc/119:19:041
10050650,0irq/346-484840026039-1kworker/0:1H23:14:230
10050650,0irq/346-4848400181ktimersoftd/123:19:021
10050650,0irq/346-4848400171rcuc/122:39:081
10050650,0irq/346-4848400171rcuc/122:39:081
10050640,0irq/346-4848400181ktimersoftd/122:47:101
81630,0rcu_preempt24761-21ssh21:24:080
81630,0rcu_preempt0-21swapper/100:34:331
81620,0rcu_preempt3-21ksoftirqd/021:30:120
81620,0rcu_preempt11989-21ps22:49:090
10050620,0irq/346-4848400181ktimersoftd/123:09:471
10050620,0irq/346-4848400171rcuc/123:16:141
10050620,0irq/346-4848400171rcuc/122:15:161
10050620,0irq/346-4848400171rcuc/121:22:111
10050620,0irq/346-48484000-21swapper/021:39:550
10050620,0irq/346-48484000-21swapper/021:22:470
81600,0rcu_preempt3-21ksoftirqd/020:14:140
10050600,0irq/346-48484005851-1kworker/0:2H23:59:210
10050600,0irq/346-4848400181ktimersoftd/122:52:191
10050600,0irq/346-4848400171rcuc/123:57:211
81590,0rcu_preempt3-21ksoftirqd/023:12:290
81590,0rcu_preempt19-21ksoftirqd/123:33:481
81590,0rcu_preempt19-21ksoftirqd/123:02:251
10050590,0irq/346-4848400171rcuc/122:20:491
10050590,0irq/346-4848400171rcuc/121:24:281
81580,0rcu_preempt3-21ksoftirqd/021:36:450
81580,0rcu_preempt19-21ksoftirqd/120:07:351
81580,0rcu_preempt19-21ksoftirqd/120:07:351
10050580,0irq/346-484840018817-1kworker/0:0H21:54:340
10050580,0irq/346-4848400171rcuc/123:39:501
10050580,0irq/346-48484001265-1kworker/0:3H22:09:060
81570,0rcu_preempt19-21ksoftirqd/122:07:041
10050570,0irq/346-4848400181ktimersoftd/122:13:251
9950560,0irq/345-48484000-21swapper/023:26:430
81560,0rcu_preempt54-21kswapd021:53:061
81560,0rcu_preempt3-21ksoftirqd/019:28:540
4350560,0irq/32-4330000016858-21dropbear21:49:000
10050560,0irq/346-48484000-21swapper/022:00:310
9950550,0irq/345-48484000-21swapper/023:58:290
81550,0rcu_preempt19-21ksoftirqd/123:58:551
81550,0rcu_preempt19-21ksoftirqd/122:02:421
81550,0rcu_preempt19-21ksoftirqd/121:54:341
9950540,0irq/345-48484000-21swapper/021:17:220
81540,0rcu_preempt19-21ksoftirqd/100:18:301
10050540,0irq/346-484840028145-1kworker/0:3H20:34:140
81530,0rcu_preempt19-21ksoftirqd/123:04:051
81530,0rcu_preempt19-21ksoftirqd/122:25:391
81530,0rcu_preempt19-21ksoftirqd/100:09:091
221699532,0cyclictest3052-21ssh00:18:561
10050530,0irq/346-484840054-21kswapd023:19:070
10050530,0irq/346-484840020771-1kworker/0:0H22:59:050
81520,0rcu_preempt19-21ksoftirqd/120:15:121
81520,0rcu_preempt19-21ksoftirqd/100:24:091
81520,0rcu_preempt11710-21ssh21:10:321
10050520,0irq/346-4848400171rcuc/121:40:171
10050520,0irq/346-484840015491-21munin-node0
9950510,0irq/345-484840026093-21ssh22:30:430
81510,0rcu_preempt31777-21ssh22:36:411
81510,0rcu_preempt19373-21memory19:59:081
81510,0rcu_preempt19-21ksoftirqd/120:24:031
10050510,0irq/346-48484003-21ksoftirqd/019:43:570
10050510,0irq/346-4848400171rcuc/123:44:091
10050510,0irq/346-4848400171rcuc/100:05:251
9950500,0irq/345-48484000-21swapper/020:53:460
9950500,0irq/345-48484000-21swapper/020:24:100
81500,0rcu_preempt54-21kswapd023:33:141
81500,0rcu_preempt3-21ksoftirqd/021:09:060
81500,0rcu_preempt19-21ksoftirqd/120:08:591
10050500,0irq/346-484840054-21kswapd023:30:200
81490,0rcu_preempt5496-21ping19:46:591
81490,0rcu_preempt19-21ksoftirqd/122:53:541
81490,0rcu_preempt19-21ksoftirqd/121:33:571
10050490,0irq/346-484840054-21kswapd023:50:481
10050490,0irq/346-484840032182-21wget20:39:020
9950480,0irq/345-48484000-21swapper/022:55:210
81480,0rcu_preempt3-21ksoftirqd/020:09:070
81480,0rcu_preempt19-21ksoftirqd/120:48:581
221699489,0cyclictest29477-21egrep21:28:591
221699482,0cyclictest14324-21processes23:24:111
10050480,0irq/346-48484001431-21ssh22:05:430
9950470,0irq/345-4848400221699cyclictest22:29:591
81470,0rcu_preempt8307-21meminfo21:04:081
81470,0rcu_preempt54-21kswapd020:59:130
81470,0rcu_preempt4179-21df_abs19:14:001
81470,0rcu_preempt19-21ksoftirqd/120:58:351
81470,0rcu_preempt19-21ksoftirqd/120:39:041
81470,0rcu_preempt19-21ksoftirqd/120:33:571
221699472,0cyclictest14978-21runrttasks21:46:551
13250470,0irq/301-4802000661-21munin-node0
13250470,0irq/301-4802000661-21munin-node0
81460,0rcu_preempt3-21ksoftirqd/021:43:560
81460,0rcu_preempt3-21ksoftirqd/020:19:060
81460,0rcu_preempt28850-21chrt20:29:030
10050460,0irq/346-484840020425-21munin-node0
10050460,0irq/346-484840020425-21munin-node0
9950450,0irq/345-48484000-21swapper/022:17:510
81450,0rcu_preempt3-21ksoftirqd/023:03:470
81450,0rcu_preempt3-21ksoftirqd/020:00:190
81450,0rcu_preempt19-21ksoftirqd/121:14:051
81450,0rcu_preempt19-21ksoftirqd/120:59:061
81450,0rcu_preempt19-21ksoftirqd/120:19:341
81450,0rcu_preempt19-21ksoftirqd/119:29:561
221699454,0cyclictest17966-21munin-node1
9950440,0irq/345-48484005496-21ping19:33:470
81440,0rcu_preempt851-21rngd19:53:540
81440,0rcu_preempt3997-21apt-get19:13:570
81440,0rcu_preempt19-21ksoftirqd/119:49:081
81440,0rcu_preempt19-21ksoftirqd/119:09:041
221699442,0cyclictest1328-21df20:43:591
10050440,0irq/346-48484005496-21ping19:23:590
9950430,0irq/345-484840013701-21cron19:43:450
81430,0rcu_preempt3-21ksoftirqd/020:54:010
81430,0rcu_preempt3-21ksoftirqd/020:43:570
81430,0rcu_preempt3-21ksoftirqd/019:09:080
81430,0rcu_preempt19-21ksoftirqd/119:39:131
221699422,0cyclictest0-21swapper/120:29:141
81410,0rcu_preempt3-21ksoftirqd/021:03:580
81410,0rcu_preempt19-21ksoftirqd/119:34:041
81410,0rcu_preempt19-21ksoftirqd/119:24:151
81410,0rcu_preempt19-21ksoftirqd/119:04:071
81410,0rcu_preempt19-21ksoftirqd/119:04:071
81400,0rcu_preempt3-21ksoftirqd/019:19:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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