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2026-05-09 - 04:13

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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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 Sat May 09, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811150,0rcu_preempt15168-21munin-node0
81900,0rcu_preempt3-21ksoftirqd/023:10:120
81890,0rcu_preempt3-21ksoftirqd/021:27:270
81880,0rcu_preempt3-21ksoftirqd/000:02:540
81870,0rcu_preempt3-21ksoftirqd/021:22:020
81870,0rcu_preempt3-21ksoftirqd/020:10:060
81850,0rcu_preempt3-21ksoftirqd/021:54:410
81850,0rcu_preempt17406-21sh21:42:380
81840,0rcu_preempt3-21ksoftirqd/022:28:240
81840,0rcu_preempt3-21ksoftirqd/000:16:390
81840,0rcu_preempt3-21ksoftirqd/000:16:390
81830,0rcu_preempt3-21ksoftirqd/020:02:250
81830,0rcu_preempt18256-21kworker/0:119:53:090
81820,0rcu_preempt3-21ksoftirqd/021:02:570
81820,0rcu_preempt3-21ksoftirqd/020:44:350
81810,0rcu_preempt3-21ksoftirqd/023:52:020
81810,0rcu_preempt3-21ksoftirqd/020:23:360
81810,0rcu_preempt15501-21diskmemload23:47:110
81810,0rcu_preempt15501-21diskmemload21:09:570
81810,0rcu_preempt15501-21diskmemload21:09:570
81800,0rcu_preempt3-21ksoftirqd/023:37:430
81800,0rcu_preempt3-21ksoftirqd/023:05:540
81800,0rcu_preempt3-21ksoftirqd/022:16:270
81800,0rcu_preempt3-21ksoftirqd/022:03:210
81800,0rcu_preempt3-21ksoftirqd/021:46:050
81800,0rcu_preempt3-21ksoftirqd/020:41:550
81800,0rcu_preempt3-21ksoftirqd/020:41:550
81800,0rcu_preempt3-21ksoftirqd/020:28:320
81800,0rcu_preempt3-21ksoftirqd/020:16:580
81800,0rcu_preempt3-21ksoftirqd/000:23:250
81790,0rcu_preempt54-21kswapd023:23:170
81790,0rcu_preempt3-21ksoftirqd/023:13:230
81790,0rcu_preempt3-21ksoftirqd/021:33:250
81790,0rcu_preempt3-21ksoftirqd/020:18:370
81790,0rcu_preempt3-21ksoftirqd/020:18:370
81790,0rcu_preempt3-21ksoftirqd/019:17:590
81790,0rcu_preempt3-21ksoftirqd/000:20:160
81790,0rcu_preempt17286-21kworker/0:122:53:340
81780,0rcu_preempt3-21ksoftirqd/022:25:340
81780,0rcu_preempt3-21ksoftirqd/020:49:130
81780,0rcu_preempt3-21ksoftirqd/020:04:300
81780,0rcu_preempt3-21ksoftirqd/019:11:230
81780,0rcu_preempt3-21ksoftirqd/019:11:230
81770,0rcu_preempt3-21ksoftirqd/022:43:130
81770,0rcu_preempt3-21ksoftirqd/019:49:100
81770,0rcu_preempt3-21ksoftirqd/000:30:580
81770,0rcu_preempt0-21swapper/022:36:080
81760,0rcu_preempt3-21ksoftirqd/022:38:340
81760,0rcu_preempt3-21ksoftirqd/022:19:530
81760,0rcu_preempt3-21ksoftirqd/022:09:500
81760,0rcu_preempt3-21ksoftirqd/022:02:450
81760,0rcu_preempt3-21ksoftirqd/022:02:450
81750,0rcu_preempt3-21ksoftirqd/023:57:140
81750,0rcu_preempt3-21ksoftirqd/023:32:320
81750,0rcu_preempt3-21ksoftirqd/022:58:470
81750,0rcu_preempt3-21ksoftirqd/021:49:260
81750,0rcu_preempt3-21ksoftirqd/021:06:500
81750,0rcu_preempt3-21ksoftirqd/020:37:120
81750,0rcu_preempt3-21ksoftirqd/000:37:440
81750,0rcu_preempt3-21ksoftirqd/000:05:320
81740,0rcu_preempt54-21kswapd019:23:370
81740,0rcu_preempt3-21ksoftirqd/022:52:120
81740,0rcu_preempt3-21ksoftirqd/021:13:090
81740,0rcu_preempt3-21ksoftirqd/000:11:440
81730,0rcu_preempt3-21ksoftirqd/023:39:440
81730,0rcu_preempt3-21ksoftirqd/021:28:350
81730,0rcu_preempt3-21ksoftirqd/020:54:290
81700,0rcu_preempt3-21ksoftirqd/019:28:350
81700,0rcu_preempt11783-21ping19:43:270
10050670,0irq/346-484840023683-21ps22:53:331
81660,0rcu_preempt3-21ksoftirqd/019:38:150
81660,0rcu_preempt3-21ksoftirqd/019:36:000
81650,0rcu_preempt3-21ksoftirqd/019:18:090
10050590,0irq/346-484840019950-21ssh21:44:281
10050560,0irq/346-484840026320-21ssh00:34:081
9950540,0irq/345-4848400181ktimersoftd/122:21:501
9950520,0irq/345-48484007192-1kworker/1:0H00:17:261
9950520,0irq/345-48484007192-1kworker/1:0H00:17:261
9950520,0irq/345-484840025040-1kworker/1:0H21:58:581
9950520,0irq/345-484840025040-1kworker/1:0H21:58:581
9950520,0irq/345-484840022393-1kworker/1:1H23:28:351
9950510,0irq/345-484840032622-1kworker/1:0H21:39:251
9950510,0irq/345-484840027659-1kworker/1:1H21:23:251
9950510,0irq/345-48484002588-1kworker/1:2H22:13:591
9950510,0irq/345-484840025040-1kworker/1:0H21:57:271
9950510,0irq/345-48484002496-1kworker/1:0H23:04:531
9950510,0irq/345-484840022690-1kworker/1:2H21:15:141
9950510,0irq/345-484840019974-1kworker/1:3H22:52:481
9950510,0irq/345-484840015157-1kworker/1:1H21:08:091
9950510,0irq/345-484840015157-1kworker/1:1H21:08:091
9950510,0irq/345-484840013358-21proc_pri23:48:341
9950510,0irq/345-484840010142-1kworker/1:1H21:37:591
9950500,0irq/345-484840027659-1kworker/1:1H21:20:541
9950500,0irq/345-484840012417-1kworker/1:3H23:18:121
9950500,0irq/345-484840012161-1kworker/1:1H00:24:391
10050500,0irq/346-484840022104-1kworker/1:3H00:30:391
9950490,0irq/345-484840032268-1kworker/1:1H23:35:361
10050490,0irq/346-48484001067-21lighttpd23:39:411
9950480,0irq/345-48484009990-1kworker/1:0H22:43:381
9950480,0irq/345-48484009990-1kworker/1:0H22:40:391
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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