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2026-03-29 - 14:39

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 792 highest latencies:
System rackaslot5s.osadl.org (updated Sun Mar 29, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811140,0rcu_preempt0-21swapper/022:26:390
81970,0rcu_preempt3-21ksoftirqd/023:34:130
81950,0rcu_preempt3-21ksoftirqd/022:54:160
81880,0rcu_preempt3-21ksoftirqd/019:25:590
81830,0rcu_preempt2273-21kworker/0:022:51:350
81810,0rcu_preempt2336-1kworker/0:0H00:34:050
81770,0rcu_preempt9616-1kworker/1:1H23:34:111
81770,0rcu_preempt31163-21diskmemload21:09:110
81740,0rcu_preempt3-21ksoftirqd/000:32:310
81730,0rcu_preempt3-21ksoftirqd/021:36:500
81710,0rcu_preempt3-21ksoftirqd/022:47:560
81700,0rcu_preempt3-21ksoftirqd/000:18:240
81700,0rcu_preempt3-21ksoftirqd/000:03:260
81690,0rcu_preempt32279-21kworker/0:123:18:230
10050690,0irq/346-4848400181ktimersoftd/121:54:061
81680,0rcu_preempt16664-21kworker/0:222:02:570
10050680,0irq/346-484840017591-1kworker/1:1H23:07:161
10050670,0irq/346-4848400675-1kworker/1:3H23:55:311
81660,0rcu_preempt3-21ksoftirqd/023:07:170
81650,0rcu_preempt19-21ksoftirqd/119:28:401
81630,0rcu_preempt7024-21kworker/0:121:17:010
81630,0rcu_preempt3-21ksoftirqd/020:28:580
81630,0rcu_preempt0-21swapper/023:56:430
81630,0rcu_preempt0-21swapper/000:23:130
81620,0rcu_preempt3-21ksoftirqd/023:29:120
81620,0rcu_preempt3-21ksoftirqd/020:48:580
81620,0rcu_preempt17847-21ssh22:33:580
81620,0rcu_preempt16664-21kworker/0:221:49:220
81620,0rcu_preempt0-21swapper/022:42:430
81620,0rcu_preempt0-21swapper/021:56:210
81610,0rcu_preempt3-21ksoftirqd/020:54:060
81610,0rcu_preempt3-21ksoftirqd/019:14:130
81610,0rcu_preempt0-21swapper/022:04:110
81600,0rcu_preempt8460-21kworker/0:223:46:120
81600,0rcu_preempt3-21ksoftirqd/021:19:080
81600,0rcu_preempt19-21ksoftirqd/121:38:471
81600,0rcu_preempt0-21swapper/022:31:120
81600,0rcu_preempt0-21swapper/021:41:270
81600,0rcu_preempt0-21swapper/000:24:470
9950590,0irq/345-48484002417199cyclictest00:34:081
81590,0rcu_preempt3-21ksoftirqd/023:38:580
81590,0rcu_preempt3-21ksoftirqd/021:03:570
81590,0rcu_preempt3-21ksoftirqd/000:03:590
81590,0rcu_preempt0-21swapper/023:20:260
81580,0rcu_preempt5742-21ps19:49:110
81580,0rcu_preempt32348-21kworker/0:000:09:510
81580,0rcu_preempt3-21ksoftirqd/023:24:060
81580,0rcu_preempt3-21ksoftirqd/023:09:100
81580,0rcu_preempt3-21ksoftirqd/019:59:000
81580,0rcu_preempt17573-21users20:24:170
81580,0rcu_preempt0-21swapper/023:49:440
81580,0rcu_preempt0-21swapper/021:46:120
10050580,0irq/346-484840054-21kswapd022:39:191
10050580,0irq/346-4848400299952sleep123:19:051
10050580,0irq/346-484840024169-21cyclictest23:32:361
10050580,0irq/346-484840021070-1kworker/1:0H21:33:261
81570,0rcu_preempt3-21ksoftirqd/021:29:110
81570,0rcu_preempt3-21ksoftirqd/020:34:050
81570,0rcu_preempt0-21swapper/022:19:460
81570,0rcu_preempt0-21swapper/020:44:050
10050570,0irq/346-484840054-21kswapd022:45:091
81560,0rcu_preempt3-21ksoftirqd/022:58:590
10050560,0irq/346-4848400181ktimersoftd/122:09:011
10050560,0irq/346-484840016138-1kworker/1:1H21:28:151
10050560,0irq/346-484840016138-1kworker/1:1H21:28:151
81550,0rcu_preempt3-21ksoftirqd/020:59:050
81550,0rcu_preempt19-21ksoftirqd/123:13:461
10050550,0irq/346-484840054-21kswapd022:36:551
10050550,0irq/346-484840054-21kswapd000:29:011
10050550,0irq/346-48484000-21swapper/123:46:131
81540,0rcu_preempt22181-21ps20:39:120
81540,0rcu_preempt0-21swapper/022:15:200
10050540,0irq/346-484840054-21kswapd023:49:441
10050540,0irq/346-484840054-21kswapd022:33:301
10050540,0irq/346-484840029890-1kworker/1:2H00:25:381
10050540,0irq/346-48484000-21swapper/122:14:151
81530,0rcu_preempt3-21ksoftirqd/022:09:070
81530,0rcu_preempt3-21ksoftirqd/019:54:110
81530,0rcu_preempt3-21ksoftirqd/019:10:570
10050530,0irq/346-48484005563-1kworker/1:1H22:22:571
81520,0rcu_preempt3-21ksoftirqd/020:19:020
81520,0rcu_preempt3-21ksoftirqd/020:19:020
81520,0rcu_preempt3-21ksoftirqd/020:14:180
81520,0rcu_preempt3-21ksoftirqd/020:03:470
81520,0rcu_preempt0-21swapper/021:26:420
81520,0rcu_preempt0-21swapper/021:26:420
10050520,0irq/346-484840054-21kswapd022:26:341
10050520,0irq/346-48484000-21swapper/122:57:451
81510,0rcu_preempt3-21ksoftirqd/020:09:070
10050510,0irq/346-484840054-21kswapd021:19:021
10050510,0irq/346-48484001635-21ssh21:11:051
10050510,0irq/346-48484000-21swapper/121:49:111
10050510,0irq/346-48484000-21swapper/121:40:181
10050510,0irq/346-48484000-21swapper/100:13:011
9950500,0irq/345-4848400181ktimersoftd/100:00:231
10050500,0irq/346-484840024865-21ssh22:08:061
10050500,0irq/346-484840020549-21ssh00:15:441
10050500,0irq/346-484840010088-21ssh00:04:421
10050500,0irq/346-48484000-21swapper/122:01:361
81490,0rcu_preempt498-21if_eth219:34:090
81490,0rcu_preempt3-21ksoftirqd/019:38:570
10050490,0irq/346-484840054-21kswapd023:01:371
10050490,0irq/346-484840054-21kswapd021:17:501
10050490,0irq/346-48484004799-1kworker/1:0H23:28:381
10050480,0irq/346-484840024556-21ssh00:19:341
10050470,0irq/346-48484004197-21ssh21:46:491
10050470,0irq/346-48484000-21swapper/123:39:481
10050470,0irq/346-48484000-21swapper/119:28:591
10050470,0irq/346-48484000-21swapper/119:28:591
81460,0rcu_preempt3-21ksoftirqd/019:07:210
10050460,0irq/346-484840026624-1kworker/1:0H23:18:161
81450,0rcu_preempt19892-21kworker/0:019:29:200
81450,0rcu_preempt19892-21kworker/0:019:29:200
10050440,0irq/346-48484002342-21ssh22:50:251
9950430,0irq/345-4848400171rcuc/121:05:421
81430,0rcu_preempt3-21ksoftirqd/019:47:010
81430,0rcu_preempt3-21ksoftirqd/019:21:160
81380,0rcu_preempt19-21ksoftirqd/120:44:141
81380,0rcu_preempt19-21ksoftirqd/119:04:101
81370,0rcu_preempt19-21ksoftirqd/119:43:591
81370,0rcu_preempt19-21ksoftirqd/119:18:591
10050370,0irq/346-484840027665-21kthreadd20:56:411
10050370,0irq/346-48484000-21swapper/120:18:571
10050370,0irq/346-48484000-21swapper/120:18:571
10050370,0irq/346-48484000-21swapper/119:14:131
81360,0rcu_preempt24169-21cyclictest19:09:101
81360,0rcu_preempt19-21ksoftirqd/119:38:461
81360,0rcu_preempt12770-1kworker/1:3H20:13:481
81350,0rcu_preempt19-21ksoftirqd/119:39:081
81350,0rcu_preempt17173-21ntpq20:24:111
10050350,0irq/346-48484000-21swapper/120:35:251
81340,0rcu_preempt19-21ksoftirqd/120:09:181
10050340,0irq/346-48484000-21swapper/120:43:391
10050330,0irq/346-48484000-21swapper/120:50:551
1699320,0migration/128643-21missed_timers20:59:081
10050320,0irq/346-48484000-21swapper/120:31:401
10050310,0irq/346-48484000-21swapper/120:01:561
81300,0rcu_preempt19-21ksoftirqd/120:08:471
10050300,0irq/346-48484000-21swapper/119:54:091
9950270,0irq/345-48484000-21swapper/119:49:031
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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