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2025-11-08 - 05:26

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 Sat Nov 08, 2025 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
136662870,0sleep09950irq/345-484840000:20:000
31432840,0sleep010050irq/346-484840020:01:100
81750,0rcu_preempt21173-21ping19:35:501
81750,0rcu_preempt19-21ksoftirqd/121:18:051
81740,0rcu_preempt3-21ksoftirqd/022:21:490
81740,0rcu_preempt21173-21ping19:25:011
27062740,0chrt9950irq/345-484840021:21:290
81730,0rcu_preempt965-21lighttpd21:52:151
81730,0rcu_preempt19-21ksoftirqd/123:26:381
81730,0rcu_preempt19-21ksoftirqd/123:26:381
81730,0rcu_preempt19-21ksoftirqd/122:04:361
81730,0rcu_preempt17217-21ssh22:19:231
81730,0rcu_preempt0-21swapper/122:05:481
296532730,0chrt9950irq/345-484840021:55:020
81720,0rcu_preempt30542-21kworker/1:123:44:211
81720,0rcu_preempt19-21ksoftirqd/122:32:561
81720,0rcu_preempt19-21ksoftirqd/122:32:561
81720,0rcu_preempt19-21ksoftirqd/121:10:121
81720,0rcu_preempt19-21ksoftirqd/121:04:461
81720,0rcu_preempt19-21ksoftirqd/120:00:251
81720,0rcu_preempt19-21ksoftirqd/119:47:221
81720,0rcu_preempt19-21ksoftirqd/119:40:021
81720,0rcu_preempt1657-21ping20:19:501
81710,0rcu_preempt19-21ksoftirqd/123:32:271
81710,0rcu_preempt19-21ksoftirqd/120:05:341
81710,0rcu_preempt19-21ksoftirqd/119:30:241
81710,0rcu_preempt19-21ksoftirqd/100:11:321
81710,0rcu_preempt0-21swapper/123:01:541
81710,0rcu_preempt0-21swapper/121:33:141
50512710,0sleep010050irq/346-484840020:09:060
81700,0rcu_preempt19-21ksoftirqd/122:53:091
81700,0rcu_preempt19-21ksoftirqd/122:46:571
81700,0rcu_preempt19-21ksoftirqd/121:37:091
81700,0rcu_preempt19-21ksoftirqd/121:23:151
81700,0rcu_preempt19-21ksoftirqd/120:32:431
81700,0rcu_preempt19-21ksoftirqd/120:18:521
81700,0rcu_preempt0-21swapper/122:20:501
81700,0rcu_preempt0-21swapper/121:25:061
81690,0rcu_preempt54-21kswapd023:21:351
81690,0rcu_preempt3929-21ssh22:42:471
81690,0rcu_preempt19-21ksoftirqd/123:47:541
81690,0rcu_preempt19-21ksoftirqd/122:09:491
81690,0rcu_preempt19-21ksoftirqd/120:40:531
81690,0rcu_preempt19-21ksoftirqd/119:51:571
81690,0rcu_preempt19-21ksoftirqd/119:22:221
81690,0rcu_preempt0-21swapper/100:24:571
81680,0rcu_preempt19-21ksoftirqd/123:55:061
81680,0rcu_preempt19-21ksoftirqd/123:35:501
81680,0rcu_preempt19-21ksoftirqd/120:49:231
81680,0rcu_preempt19-21ksoftirqd/120:25:311
81680,0rcu_preempt19-21ksoftirqd/120:12:021
81680,0rcu_preempt19-21ksoftirqd/100:20:031
81680,0rcu_preempt0-21swapper/100:32:581
81670,0rcu_preempt22856-1kworker/0:3H21:11:190
81670,0rcu_preempt19-21ksoftirqd/123:12:021
81670,0rcu_preempt19-21ksoftirqd/123:07:591
81670,0rcu_preempt19-21ksoftirqd/122:27:561
81670,0rcu_preempt19-21ksoftirqd/119:59:071
81670,0rcu_preempt19-21ksoftirqd/100:02:221
81660,0rcu_preempt3-21ksoftirqd/022:50:100
81660,0rcu_preempt3-21ksoftirqd/000:05:360
81660,0rcu_preempt19-21ksoftirqd/123:15:201
81660,0rcu_preempt19-21ksoftirqd/121:55:061
81660,0rcu_preempt19-21ksoftirqd/121:45:161
81660,0rcu_preempt19-21ksoftirqd/119:17:081
81660,0rcu_preempt19-21ksoftirqd/100:37:541
81660,0rcu_preempt19-21ksoftirqd/100:18:361
81660,0rcu_preempt19-21ksoftirqd/100:07:481
81650,0rcu_preempt3-21ksoftirqd/022:15:190
81650,0rcu_preempt19-21ksoftirqd/122:54:541
81650,0rcu_preempt19-21ksoftirqd/122:38:121
81650,0rcu_preempt19-21ksoftirqd/121:41:101
81650,0rcu_preempt19-21ksoftirqd/121:06:211
81650,0rcu_preempt19-21ksoftirqd/120:57:311
81650,0rcu_preempt19-21ksoftirqd/120:39:131
81640,0rcu_preempt19-21ksoftirqd/120:54:251
18282640,0sleep010050irq/346-484840019:59:460
81630,0rcu_preempt19-21ksoftirqd/123:50:041
114172630,0sleep010050irq/346-484840020:27:040
81620,0rcu_preempt3-21ksoftirqd/022:06:340
81620,0rcu_preempt24112-1kworker/0:1H19:34:470
86292600,0sleep09950irq/345-484840022:49:080
81590,0rcu_preempt19-21ksoftirqd/119:13:251
81580,0rcu_preempt3-21ksoftirqd/022:10:180
80722570,0sleep010050irq/346-484840020:16:300
64982570,0sleep010050irq/346-484840020:12:050
81550,0rcu_preempt3-21ksoftirqd/022:35:120
81550,0rcu_preempt27369-1kworker/0:2H19:39:470
10050550,0irq/346-484840027519-1kworker/0:1H22:01:120
10050550,0irq/346-484840023151-1kworker/0:0H00:35:090
81540,0rcu_preempt9950irq/345-484840021:39:490
81540,0rcu_preempt10007-21kworker/0:123:56:230
10050540,0irq/346-484840054-21kswapd022:24:530
10050540,0irq/346-48484004700-1kworker/0:0H23:30:090
10050540,0irq/346-484840019306-1kworker/0:3H21:45:090
170752530,0sleep09950irq/345-484840021:39:480
10050530,0irq/346-48484000-21swapper/023:12:170
10050520,0irq/346-484840054-21kswapd022:30:360
10050520,0irq/346-484840054-21kswapd022:30:360
10050520,0irq/346-48484000-21swapper/023:25:030
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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