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2026-08-09 - 09:09

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 Sun Aug 09, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811390,0rcu_preempt3-21ksoftirqd/023:25:080
811390,0rcu_preempt3-21ksoftirqd/022:15:290
811390,0rcu_preempt3-21ksoftirqd/021:34:510
811370,0rcu_preempt54-21kswapd023:08:510
811370,0rcu_preempt3-21ksoftirqd/022:08:580
811330,0rcu_preempt3-21ksoftirqd/023:45:590
811330,0rcu_preempt3-21ksoftirqd/021:46:470
811330,0rcu_preempt3-21ksoftirqd/021:42:340
811330,0rcu_preempt3-21ksoftirqd/021:12:210
811320,0rcu_preempt3-21ksoftirqd/023:40:250
811320,0rcu_preempt3-21ksoftirqd/022:32:390
811320,0rcu_preempt3-21ksoftirqd/000:23:490
811270,0rcu_preempt3-21ksoftirqd/021:25:160
811190,0rcu_preempt3-21ksoftirqd/023:32:450
811150,0rcu_preempt3-21ksoftirqd/000:16:210
811110,0rcu_preempt3-21ksoftirqd/000:26:040
811080,0rcu_preempt54-21kswapd021:31:580
81990,0rcu_preempt3-21ksoftirqd/023:37:180
81980,0rcu_preempt3-21ksoftirqd/022:36:450
81870,0rcu_preempt3-21ksoftirqd/019:14:510
10250830,0irq/333-mmc00-21swapper/121:25:101
81760,0rcu_preempt3-21ksoftirqd/021:17:490
81760,0rcu_preempt3-21ksoftirqd/019:55:170
81750,0rcu_preempt3-21ksoftirqd/020:20:030
81700,0rcu_preempt3-21ksoftirqd/022:40:030
10050700,0irq/346-484840022243-1kworker/0:2H22:56:130
10050690,0irq/346-484840011184-1kworker/0:0H22:11:320
81670,0rcu_preempt54-21kswapd022:26:221
10050670,0irq/346-4848400588-1kworker/0:2H21:57:210
9950650,0irq/345-484840081rcu_preempt23:35:571
10050650,0irq/346-484840081rcu_preempt22:41:221
10050650,0irq/346-4848400181ktimersoftd/123:57:381
9950640,0irq/345-484840019-21ksoftirqd/123:18:581
10050640,0irq/346-48484006304-1kworker/0:3H22:19:520
10050640,0irq/346-4848400181ktimersoftd/100:19:221
10050630,0irq/346-484840081rcu_preempt22:05:551
10050630,0irq/346-484840054-21kswapd021:40:221
10050630,0irq/346-484840019-21ksoftirqd/100:24:001
10050620,0irq/346-48484000-21swapper/023:22:000
9950610,0irq/345-484840019-21ksoftirqd/122:20:341
9950610,0irq/345-484840019-21ksoftirqd/100:04:551
13250610,0irq/301-480200019585-21ssh23:55:060
10050610,0irq/346-484840028413-1kworker/0:1H19:59:520
10050610,0irq/346-4848400181ktimersoftd/100:03:141
10050610,0irq/346-4848400171rcuc/122:38:321
81600,0rcu_preempt19-21ksoftirqd/120:25:291
81600,0rcu_preempt19-21ksoftirqd/120:25:291
10050600,0irq/346-4848400181ktimersoftd/123:30:421
10050600,0irq/346-4848400181ktimersoftd/121:47:461
10050600,0irq/346-484840016459-1kworker/1:1H23:54:021
81590,0rcu_preempt54-21kswapd000:33:131
81590,0rcu_preempt3-21ksoftirqd/000:39:510
81590,0rcu_preempt3-21ksoftirqd/000:39:510
81590,0rcu_preempt19303-21diskmemload22:02:580
81590,0rcu_preempt19-21ksoftirqd/122:34:061
81590,0rcu_preempt19-21ksoftirqd/121:57:021
81590,0rcu_preempt19-21ksoftirqd/121:00:251
10050590,0irq/346-48484005351-1kworker/0:1H23:10:090
10050590,0irq/346-4848400181ktimersoftd/123:11:341
9950580,0irq/345-4848400171rcuc/121:35:391
81580,0rcu_preempt29958-21ping20:05:180
81580,0rcu_preempt19-21ksoftirqd/122:55:041
111580,0rcuc/03710-1kworker/0:2H00:12:240
10050580,0irq/346-484840031196-1kworker/0:0H00:06:300
10050580,0irq/346-484840026640-1kworker/0:1H22:25:590
10050580,0irq/346-484840012398-1kworker/0:0H22:45:020
9950570,0irq/345-4848400181ktimersoftd/121:33:581
9950570,0irq/345-4848400171rcuc/123:41:021
9950570,0irq/345-4848400171rcuc/100:35:581
9950570,0irq/345-4848400171rcuc/100:35:581
10050570,0irq/346-4848400836-21rngd19:19:510
10050570,0irq/346-4848400181ktimersoftd/121:49:561
10050570,0irq/346-48484000-21swapper/023:01:530
10050570,0irq/346-48484000-21swapper/023:01:530
81560,0rcu_preempt3-21ksoftirqd/021:21:210
81560,0rcu_preempt19-21ksoftirqd/120:05:091
9950550,0irq/345-4848400171rcuc/122:51:031
9950550,0irq/345-4848400171rcuc/122:49:231
81550,0rcu_preempt19-21ksoftirqd/119:34:071
81550,0rcu_preempt19-21ksoftirqd/100:25:311
10050550,0irq/346-484840029608-21df_abs21:20:051
10050550,0irq/346-484840013591-1kworker/0:2H00:30:160
81540,0rcu_preempt3-21ksoftirqd/019:05:020
81540,0rcu_preempt19-21ksoftirqd/123:47:061
10050540,0irq/346-4848400181ktimersoftd/123:25:471
10050540,0irq/346-48484000-21swapper/022:53:100
9950530,0irq/345-4848400836-21rngd00:11:521
10050530,0irq/346-484840054-21kswapd021:16:461
10050530,0irq/346-48484005351-1kworker/0:1H23:15:060
10050530,0irq/346-484840025453-1kworker/0:2H00:00:390
9950520,0irq/345-4848400836-21rngd22:18:491
9950520,0irq/345-4848400171rcuc/121:10:251
81520,0rcu_preempt3-21ksoftirqd/020:40:150
81520,0rcu_preempt3-21ksoftirqd/019:25:120
10050520,0irq/346-4848400181ktimersoftd/123:01:321
10050520,0irq/346-4848400181ktimersoftd/123:01:321
9950510,0irq/345-484840022326-21apt-get19:40:020
81510,0rcu_preempt3-21ksoftirqd/020:45:170
10050510,0irq/346-484840026829-21if_eth021:50:070
10050510,0irq/346-484840025587-21munin-node0
10050510,0irq/346-4848400181ktimersoftd/123:07:521
81500,0rcu_preempt3-21ksoftirqd/023:54:130
81500,0rcu_preempt3-21ksoftirqd/020:25:170
81500,0rcu_preempt3-21ksoftirqd/020:25:170
9950490,0irq/345-484840029958-21ping20:15:180
81490,0rcu_preempt19-21ksoftirqd/120:03:401
10050490,0irq/346-484840054-21kswapd023:21:101
10050490,0irq/346-484840019023-1kworker/1:3H21:09:511
10050490,0irq/346-4848400171rcuc/119:50:021
10050490,0irq/346-484840015424-21sshd19:18:031
9950480,0irq/345-48484000-21swapper/020:59:520
81480,0rcu_preempt3-21ksoftirqd/020:50:050
81480,0rcu_preempt3-21ksoftirqd/020:30:220
10050480,0irq/346-484840015247-21munin-node0
81470,0rcu_preempt3-21ksoftirqd/021:05:160
81470,0rcu_preempt19-21ksoftirqd/122:10:171
81470,0rcu_preempt19-21ksoftirqd/119:06:051
10050460,0irq/346-484840054-21kswapd022:04:061
10050460,0irq/346-484840021854-1kworker/0:3H19:39:510
81450,0rcu_preempt3-21ksoftirqd/020:12:060
81440,0rcu_preempt3-21ksoftirqd/020:35:080
81440,0rcu_preempt3-21ksoftirqd/019:45:200
81430,0rcu_preempt19-21ksoftirqd/120:22:071
81430,0rcu_preempt19-21ksoftirqd/120:19:511
81430,0rcu_preempt19-21ksoftirqd/120:10:171
10050430,0irq/346-48484000-21swapper/019:32:060
81420,0rcu_preempt15608-21ping19:19:530
81420,0rcu_preempt15608-21ping19:19:530
81400,0rcu_preempt23958-21apt-get19:45:031
81400,0rcu_preempt19-21ksoftirqd/120:31:271
81400,0rcu_preempt19-21ksoftirqd/119:35:151
81400,0rcu_preempt15774-21apt-get19:20:031
81400,0rcu_preempt15774-21apt-get19:20:031
81390,0rcu_preempt19-21ksoftirqd/119:57:591
81390,0rcu_preempt19-21ksoftirqd/119:44:511
81390,0rcu_preempt19-21ksoftirqd/119:25:251
81390,0rcu_preempt19-21ksoftirqd/119:10:091
81370,0rcu_preempt19-21ksoftirqd/120:36:091
81360,0rcu_preempt19-21ksoftirqd/120:55:581
81360,0rcu_preempt19-21ksoftirqd/120:50:231
81360,0rcu_preempt19-21ksoftirqd/120:44:531
81360,0rcu_preempt19-21ksoftirqd/120:41:331
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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