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2026-03-14 - 03:13

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 Sat Mar 14, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811520,0rcu_preempt3-21ksoftirqd/000:14:010
811430,0rcu_preempt3-21ksoftirqd/023:29:270
811050,0rcu_preempt54-21kswapd020:37:211
81990,0rcu_preempt0-21swapper/100:09:141
81960,0rcu_preempt19-21ksoftirqd/122:31:191
81950,0rcu_preempt14990-21diskmemload00:01:251
81920,0rcu_preempt19-21ksoftirqd/100:17:381
81900,0rcu_preempt54-21kswapd000:27:371
81870,0rcu_preempt19-21ksoftirqd/122:14:371
81870,0rcu_preempt19-21ksoftirqd/100:05:491
81860,0rcu_preempt19-21ksoftirqd/121:59:161
81830,0rcu_preempt19-21ksoftirqd/123:34:431
81830,0rcu_preempt19-21ksoftirqd/123:34:431
81820,0rcu_preempt19-21ksoftirqd/122:20:331
81810,0rcu_preempt19-21ksoftirqd/121:42:221
81810,0rcu_preempt19-21ksoftirqd/121:27:461
81800,0rcu_preempt19-21ksoftirqd/122:43:291
81770,0rcu_preempt19-21ksoftirqd/122:55:491
81770,0rcu_preempt0-21swapper/121:09:081
81760,0rcu_preempt19-21ksoftirqd/123:26:481
81750,0rcu_preempt19-21ksoftirqd/100:29:331
81730,0rcu_preempt3-21ksoftirqd/022:04:100
81710,0rcu_preempt54-21kswapd022:46:191
81690,0rcu_preempt4356-1kworker/1:0H00:20:011
10050690,0irq/346-4848400171rcuc/119:11:121
81680,0rcu_preempt19-21ksoftirqd/122:38:441
10050680,0irq/346-4848400171rcuc/123:52:131
81670,0rcu_preempt19-21ksoftirqd/123:42:361
81670,0rcu_preempt19-21ksoftirqd/119:36:211
10050670,0irq/346-48484000-21swapper/021:56:440
81650,0rcu_preempt19-21ksoftirqd/119:29:211
10050650,0irq/346-4848400181ktimersoftd/123:07:191
10050650,0irq/346-4848400171rcuc/123:02:191
10050650,0irq/346-4848400171rcuc/121:56:571
81640,0rcu_preempt3-21ksoftirqd/000:19:570
81640,0rcu_preempt19-21ksoftirqd/123:58:561
81640,0rcu_preempt19-21ksoftirqd/122:51:371
81630,0rcu_preempt54-21kswapd020:39:130
81620,0rcu_preempt19-21ksoftirqd/123:17:241
81620,0rcu_preempt19-21ksoftirqd/121:49:111
10050620,0irq/346-4848400171rcuc/122:04:311
10050620,0irq/346-4848400171rcuc/121:19:401
81610,0rcu_preempt19-21ksoftirqd/123:30:391
10050610,0irq/346-484840014292-21rm23:19:450
10050610,0irq/346-48484000-21swapper/000:30:570
81600,0rcu_preempt19-21ksoftirqd/121:45:171
10050600,0irq/346-484840030832-1kworker/0:3H22:54:120
10050600,0irq/346-484840016124-1kworker/0:3H22:17:150
81590,0rcu_preempt19-21ksoftirqd/121:18:581
10050590,0irq/346-4848400181ktimersoftd/120:13:391
10050590,0irq/346-4848400171rcuc/123:23:311
9950580,0irq/345-48484000-21swapper/020:54:120
81580,0rcu_preempt3-21ksoftirqd/000:04:500
10050580,0irq/346-484840010191-1kworker/0:1H23:18:450
9950570,0irq/345-48484000-21swapper/021:26:320
10050570,0irq/346-484840022443-21ssh00:34:230
10050570,0irq/346-4848400171rcuc/123:48:371
9950560,0irq/345-484840017109-1kworker/0:3H00:02:470
81560,0rcu_preempt19-21ksoftirqd/121:38:151
81560,0rcu_preempt19-21ksoftirqd/120:44:181
81560,0rcu_preempt19-21ksoftirqd/120:09:001
10050560,0irq/346-484840019167-1kworker/0:2H21:49:000
10050560,0irq/346-484840017265-1kworker/0:2H21:10:390
10050560,0irq/346-4848400171rcuc/121:31:121
81550,0rcu_preempt3-21ksoftirqd/022:40:050
81550,0rcu_preempt19-21ksoftirqd/122:24:111
81550,0rcu_preempt19-21ksoftirqd/120:18:211
10050550,0irq/346-48484003332-1kworker/0:0H22:38:320
10050550,0irq/346-484840031752-21ssh00:10:510
10050550,0irq/346-484840015405-21ssh00:27:350
10050550,0irq/346-484840014769-21ssh23:54:110
10050550,0irq/346-484840013171-1kworker/0:0H22:59:280
10050550,0irq/346-484840010191-1kworker/0:1H23:24:200
9950540,0irq/345-48484000-21swapper/023:39:180
9950540,0irq/345-48484000-21swapper/023:37:060
9950540,0irq/345-48484000-21swapper/023:37:060
9950540,0irq/345-48484000-21swapper/022:09:270
81540,0rcu_preempt6920-21apt-get20:44:100
81540,0rcu_preempt32765-21192.168.115.60-23:05:490
81540,0rcu_preempt19-21ksoftirqd/119:04:211
81540,0rcu_preempt1470-21runrttasks20:00:041
10050540,0irq/346-48484008241-1kworker/0:1H22:44:300
10050540,0irq/346-484840019222-1kworker/0:3H20:19:220
81530,0rcu_preempt24140-21ping20:09:190
81530,0rcu_preempt19-21ksoftirqd/123:09:251
81530,0rcu_preempt19-21ksoftirqd/120:39:181
81530,0rcu_preempt19-21ksoftirqd/120:29:181
81530,0rcu_preempt19-21ksoftirqd/119:14:111
81530,0rcu_preempt0-21swapper/023:12:450
10050530,0irq/346-4848400851-21rngd21:39:090
10050530,0irq/346-484840024038-1kworker/0:1H21:50:590
10050530,0irq/346-48484000-21swapper/021:38:380
10050530,0irq/346-48484000-21swapper/021:20:170
9950520,0irq/345-4848400171rcuc/100:37:051
13250520,0irq/301-48020000-21swapper/020:34:130
9950510,0irq/345-48484000-21swapper/023:44:180
9950510,0irq/345-48484000-21swapper/022:33:530
81510,0rcu_preempt851-21rngd19:57:091
81510,0rcu_preempt24140-21ping20:19:121
10050510,0irq/346-484840022908-21apt-get19:54:130
10050510,0irq/346-48484000-21swapper/023:52:140
9950500,0irq/345-48484000-21swapper/022:52:260
798999502,0cyclictest20008-21timerwakeupswit22:19:280
81490,0rcu_preempt3-21ksoftirqd/019:59:110
81490,0rcu_preempt3-21ksoftirqd/019:04:230
81490,0rcu_preempt19-21ksoftirqd/122:12:191
9950480,0irq/345-484840011272-21ping19:44:130
9950480,0irq/345-48484000-21swapper/022:02:430
81480,0rcu_preempt3-21ksoftirqd/020:34:010
10050480,0irq/346-48484004467-21ssh21:30:340
10050480,0irq/346-484840025948-1kworker/0:1H22:27:390
81470,0rcu_preempt54-21kswapd021:04:181
81470,0rcu_preempt3-21ksoftirqd/020:14:120
9950460,0irq/345-484840024140-21ping20:04:180
81460,0rcu_preempt3-21ksoftirqd/021:14:210
81460,0rcu_preempt19-21ksoftirqd/119:25:151
81450,0rcu_preempt29118-21kworker/1:020:26:041
81450,0rcu_preempt11272-21ping19:19:091
81440,0rcu_preempt3-21ksoftirqd/020:59:200
81440,0rcu_preempt3-21ksoftirqd/019:49:120
799099445,0cyclictest10446-21munin-node1
799099443,0cyclictest0-21swapper/120:59:121
81430,0rcu_preempt3-21ksoftirqd/020:24:210
81430,0rcu_preempt19-21ksoftirqd/119:44:211
799099438,0cyclictest9265-21munin-node1
81420,0rcu_preempt3-21ksoftirqd/019:15:540
81420,0rcu_preempt3-21ksoftirqd/019:09:180
81420,0rcu_preempt19-21ksoftirqd/119:49:141
81420,0rcu_preempt19-21ksoftirqd/119:39:541
1599420,0migration/017611-21taskset19:36:450
81410,0rcu_preempt3-21ksoftirqd/021:04:050
81410,0rcu_preempt3-21ksoftirqd/019:21:360
81400,0rcu_preempt18652-21tr19:39:280
10050400,0irq/346-48484001339-21snmpd20:49:260
798999392,0cyclictest11272-21ping19:24:140
798999372,0cyclictest0-21swapper/019:32:280
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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