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2026-09-13 - 10:58

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Sun Sep 13, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811340,0rcu_preempt3-21ksoftirqd/022:43:390
811340,0rcu_preempt3-21ksoftirqd/021:36:520
811330,0rcu_preempt3-21ksoftirqd/022:58:560
811330,0rcu_preempt3-21ksoftirqd/022:48:000
811290,0rcu_preempt3-21ksoftirqd/023:24:060
811280,0rcu_preempt3-21ksoftirqd/023:37:220
811270,0rcu_preempt3-21ksoftirqd/023:41:490
811270,0rcu_preempt3-21ksoftirqd/022:09:470
811250,0rcu_preempt3-21ksoftirqd/021:52:280
811250,0rcu_preempt3-21ksoftirqd/000:18:320
811240,0rcu_preempt31123-21kworker/0:223:29:170
811190,0rcu_preempt3-21ksoftirqd/021:17:560
811180,0rcu_preempt3-21ksoftirqd/023:01:010
811180,0rcu_preempt3-21ksoftirqd/000:27:100
811160,0rcu_preempt3-21ksoftirqd/023:56:140
811160,0rcu_preempt3-21ksoftirqd/021:12:480
811150,0rcu_preempt3-21ksoftirqd/023:16:310
811150,0rcu_preempt3-21ksoftirqd/022:51:110
811150,0rcu_preempt3-21ksoftirqd/022:00:400
811150,0rcu_preempt3-21ksoftirqd/022:00:400
811140,0rcu_preempt3-21ksoftirqd/022:20:270
811110,0rcu_preempt3-21ksoftirqd/023:09:490
811110,0rcu_preempt3-21ksoftirqd/023:09:490
811090,0rcu_preempt3-21ksoftirqd/022:08:510
811090,0rcu_preempt3-21ksoftirqd/000:23:060
811090,0rcu_preempt3-21ksoftirqd/000:23:060
811080,0rcu_preempt3-21ksoftirqd/023:32:400
811080,0rcu_preempt3-21ksoftirqd/022:34:270
811080,0rcu_preempt3-21ksoftirqd/000:10:140
811080,0rcu_preempt3-21ksoftirqd/000:06:400
811070,0rcu_preempt3-21ksoftirqd/022:29:420
811050,0rcu_preempt3-21ksoftirqd/000:30:530
811040,0rcu_preempt3-21ksoftirqd/021:46:440
811030,0rcu_preempt3-21ksoftirqd/021:56:180
81870,0rcu_preempt3-21ksoftirqd/023:49:400
81870,0rcu_preempt3-21ksoftirqd/022:19:180
81870,0rcu_preempt25594-21kworker/0:220:35:190
81870,0rcu_preempt25594-21kworker/0:220:35:190
81860,0rcu_preempt3-21ksoftirqd/021:28:040
81850,0rcu_preempt3-21ksoftirqd/021:41:190
81850,0rcu_preempt3-21ksoftirqd/020:16:130
81840,0rcu_preempt3-21ksoftirqd/019:59:420
81840,0rcu_preempt22940-21kworker/0:222:28:270
81830,0rcu_preempt3-21ksoftirqd/020:30:250
81830,0rcu_preempt23732-21kworker/0:120:22:400
81810,0rcu_preempt3-21ksoftirqd/021:22:360
81810,0rcu_preempt3-21ksoftirqd/020:25:270
81810,0rcu_preempt3-21ksoftirqd/000:37:060
81800,0rcu_preempt3-21ksoftirqd/021:30:230
81790,0rcu_preempt784-21ssh23:44:380
81790,0rcu_preempt3-21ksoftirqd/020:54:540
81790,0rcu_preempt20064-21kworker/0:020:08:380
81790,0rcu_preempt20064-21kworker/0:020:08:380
81780,0rcu_preempt3-21ksoftirqd/019:16:300
81760,0rcu_preempt3-21ksoftirqd/023:59:210
81760,0rcu_preempt3-21ksoftirqd/023:59:210
81760,0rcu_preempt3-21ksoftirqd/019:13:170
81740,0rcu_preempt3-21ksoftirqd/020:49:460
81740,0rcu_preempt3-21ksoftirqd/020:39:330
81740,0rcu_preempt3-21ksoftirqd/019:50:310
81740,0rcu_preempt27201-1kworker/0:3H23:06:340
81730,0rcu_preempt3-21ksoftirqd/020:59:330
81720,0rcu_preempt3-21ksoftirqd/021:08:540
81710,0rcu_preempt3-21ksoftirqd/020:14:180
81700,0rcu_preempt3-21ksoftirqd/020:44:310
81690,0rcu_preempt3-21ksoftirqd/019:45:520
81680,0rcu_preempt3-21ksoftirqd/019:19:350
81640,0rcu_preempt3-21ksoftirqd/019:39:190
81640,0rcu_preempt3-21ksoftirqd/019:39:190
10050590,0irq/346-484840023314-1kworker/1:1H21:34:381
10050590,0irq/346-484840022683-21ssh21:56:141
10050590,0irq/346-4848400171rcuc/121:09:291
9950580,0irq/345-4848400171rcuc/122:40:181
10050580,0irq/346-4848400181ktimersoftd/123:26:071
10050580,0irq/346-4848400181ktimersoftd/122:38:021
10050580,0irq/346-484840013214-21ssh22:51:591
9950560,0irq/345-484840081rcu_preempt23:39:281
9950560,0irq/345-4848400171rcuc/100:21:271
9950560,0irq/345-4848400171rcuc/100:21:271
81560,0rcu_preempt19-21ksoftirqd/121:33:331
10050560,0irq/346-484840054-21kswapd023:19:171
10050560,0irq/346-48484001947-1kworker/0:3H19:24:400
9950550,0irq/345-4848400171rcuc/121:50:381
81550,0rcu_preempt19-21ksoftirqd/121:26:351
10050550,0irq/346-484840054-21kswapd022:59:201
9950540,0irq/345-4848400171rcuc/100:31:261
81540,0rcu_preempt19-21ksoftirqd/122:23:521
81540,0rcu_preempt0-21swapper/121:20:141
10050540,0irq/346-4848400181ktimersoftd/123:19:231
10050540,0irq/346-48484000-21swapper/122:14:421
9950520,0irq/345-4848400181ktimersoftd/122:46:411
9950520,0irq/345-4848400171rcuc/123:59:171
81520,0rcu_preempt19-21ksoftirqd/123:09:481
81520,0rcu_preempt19-21ksoftirqd/123:09:481
10050520,0irq/346-484840057699cyclictest21:49:121
9950500,0irq/345-4848400171rcuc/122:11:211
9950490,0irq/345-484840094692sleep123:53:371
9950490,0irq/345-4848400181ktimersoftd/123:47:181
81490,0rcu_preempt25525-21kworker/1:219:19:181
81490,0rcu_preempt19-21ksoftirqd/121:19:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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