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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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Click here to display the system's profile data or here to proceed to next system.
Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 Fri Jan 23, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811130,0rcu_preempt19-21ksoftirqd/122:20:071
81900,0rcu_preempt31971-21kworker/0:220:11:410
81900,0rcu_preempt2582-21kworker/0:120:24:400
81890,0rcu_preempt3-21ksoftirqd/023:29:590
81890,0rcu_preempt3-21ksoftirqd/021:16:330
81870,0rcu_preempt3-21ksoftirqd/023:13:490
81870,0rcu_preempt3-21ksoftirqd/022:03:070
81860,0rcu_preempt3-21ksoftirqd/023:55:140
81860,0rcu_preempt3-21ksoftirqd/021:38:570
81860,0rcu_preempt3-21ksoftirqd/020:37:590
81860,0rcu_preempt28275-21kworker/0:022:28:180
81850,0rcu_preempt3-21ksoftirqd/021:09:060
81840,0rcu_preempt3-21ksoftirqd/023:29:280
81840,0rcu_preempt3-21ksoftirqd/021:57:480
81830,0rcu_preempt3-21ksoftirqd/000:12:430
81830,0rcu_preempt19460-21kworker/0:121:30:420
81820,0rcu_preempt3-21ksoftirqd/023:49:170
81820,0rcu_preempt3-21ksoftirqd/023:38:250
81820,0rcu_preempt3-21ksoftirqd/021:43:500
81820,0rcu_preempt3-21ksoftirqd/020:25:110
81820,0rcu_preempt3-21ksoftirqd/020:19:440
81820,0rcu_preempt30015-21kworker/0:120:07:450
81810,0rcu_preempt3-21ksoftirqd/022:44:450
81810,0rcu_preempt3-21ksoftirqd/021:25:070
81810,0rcu_preempt3-21ksoftirqd/021:20:120
81810,0rcu_preempt3-21ksoftirqd/019:18:540
81810,0rcu_preempt3-21ksoftirqd/000:17:210
81810,0rcu_preempt26595-21munin-run19:54:470
81800,0rcu_preempt3-21ksoftirqd/023:51:290
81800,0rcu_preempt3-21ksoftirqd/022:57:480
81800,0rcu_preempt3-21ksoftirqd/022:57:480
81800,0rcu_preempt3-21ksoftirqd/022:16:010
81800,0rcu_preempt3-21ksoftirqd/021:51:230
81800,0rcu_preempt3-21ksoftirqd/020:42:590
81800,0rcu_preempt3-21ksoftirqd/020:30:030
81790,0rcu_preempt3-21ksoftirqd/023:20:360
81790,0rcu_preempt3-21ksoftirqd/023:05:470
81790,0rcu_preempt3-21ksoftirqd/023:02:400
81790,0rcu_preempt3-21ksoftirqd/022:12:140
81790,0rcu_preempt3-21ksoftirqd/020:04:430
81790,0rcu_preempt3-21ksoftirqd/000:24:540
81790,0rcu_preempt21681-21kworker/0:119:57:110
81790,0rcu_preempt19183-21apt-get21:09:590
81780,0rcu_preempt3-21ksoftirqd/022:04:530
81780,0rcu_preempt3-21ksoftirqd/020:57:120
81780,0rcu_preempt3-21ksoftirqd/020:57:120
81780,0rcu_preempt3-21ksoftirqd/000:00:560
81770,0rcu_preempt3-21ksoftirqd/022:52:000
81770,0rcu_preempt3-21ksoftirqd/020:49:260
81770,0rcu_preempt3-21ksoftirqd/000:30:550
81770,0rcu_preempt3-21ksoftirqd/000:30:550
81770,0rcu_preempt18159-21ssh23:19:430
81770,0rcu_preempt13259-21kworker/0:021:00:110
81760,0rcu_preempt3-21ksoftirqd/022:37:080
81760,0rcu_preempt3-21ksoftirqd/022:30:150
81760,0rcu_preempt3-21ksoftirqd/019:10:050
81760,0rcu_preempt3-21ksoftirqd/000:08:410
81760,0rcu_preempt3-21ksoftirqd/000:08:410
81760,0rcu_preempt21681-21kworker/0:119:45:150
81750,0rcu_preempt3-21ksoftirqd/023:40:060
81750,0rcu_preempt3-21ksoftirqd/022:47:320
81750,0rcu_preempt3-21ksoftirqd/000:38:260
81740,0rcu_preempt3-21ksoftirqd/000:20:180
81730,0rcu_preempt31971-21kworker/0:222:24:250
81720,0rcu_preempt3-21ksoftirqd/021:46:340
81700,0rcu_preempt54-21kswapd019:20:010
81690,0rcu_preempt3-21ksoftirqd/020:50:070
81690,0rcu_preempt3-21ksoftirqd/019:40:030
81690,0rcu_preempt19185-21munin-node0
81660,0rcu_preempt3-21ksoftirqd/019:35:230
81640,0rcu_preempt3-21ksoftirqd/019:25:240
10050610,0irq/346-48484005626-1kworker/1:1H00:11:501
10050600,0irq/346-484840054-21kswapd023:24:071
9950570,0irq/345-4848400181ktimersoftd/100:05:491
9950570,0irq/345-4848400181ktimersoftd/100:05:491
9950570,0irq/345-484840016038-1kworker/1:0H22:12:581
9950560,0irq/345-484840016920-1kworker/1:1H21:17:201
9950540,0irq/345-484840016038-1kworker/1:0H22:15:041
10050540,0irq/346-484840054-21kswapd023:18:551
10050540,0irq/346-484840018140-1kworker/1:3H23:53:551
9950520,0irq/345-4848400181ktimersoftd/100:01:471
81520,0rcu_preempt19-21ksoftirqd/119:05:001
9950510,0irq/345-484840030728-1kworker/1:1H23:33:401
9950510,0irq/345-484840028374-1kworker/1:2H23:01:571
10050510,0irq/346-484840054-21kswapd021:56:511
9950500,0irq/345-484840014714-1kworker/1:1H19:19:491
9950500,0irq/345-484840010889-1kworker/1:2H23:12:141
9950490,0irq/345-48484008485-1kworker/1:4H22:50:481
9950490,0irq/345-48484005936-1kworker/1:1H23:06:511
9950490,0irq/345-484840028102-1kworker/1:2H00:24:511
9950490,0irq/345-484840025521-1kworker/1:3H00:34:381
9950490,0irq/345-484840025521-1kworker/1:3H00:34:381
9950490,0irq/345-484840023395-1kworker/1:1H22:54:481
9950490,0irq/345-484840023395-1kworker/1:1H22:54:481
9950490,0irq/345-484840013185-1kworker/1:2H23:48:241
10050490,0irq/346-48484008484-1kworker/1:2H22:40:481
9950480,0irq/345-48484003776-1kworker/1:2H21:27:261
9950480,0irq/345-48484001088-1kworker/1:0H22:00:511
10050480,0irq/346-48484001427-21cron21:24:471
10050470,0irq/346-484840054-21kswapd022:27:501
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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