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2025-12-09 - 09:14

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 Tue Dec 09, 2025 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811050,0rcu_preempt29399-21ssh23:15:491
811030,0rcu_preempt19-21ksoftirqd/122:44:521
81980,0rcu_preempt18569-21ssh23:03:301
81970,0rcu_preempt19-21ksoftirqd/123:39:251
81960,0rcu_preempt0-21swapper/123:10:361
81960,0rcu_preempt0-21swapper/122:32:271
81960,0rcu_preempt0-21swapper/122:27:451
81950,0rcu_preempt54-21kswapd022:03:031
81940,0rcu_preempt0-21swapper/122:38:271
81940,0rcu_preempt0-21swapper/122:17:171
81920,0rcu_preempt14151-21kworker/1:121:58:071
81920,0rcu_preempt14151-21kworker/1:121:58:071
81910,0rcu_preempt19-21ksoftirqd/100:14:371
81900,0rcu_preempt7443-21ssh21:30:581
81900,0rcu_preempt19-21ksoftirqd/122:08:221
81900,0rcu_preempt0-21swapper/121:38:581
81900,0rcu_preempt0-21swapper/121:17:001
81900,0rcu_preempt0-21swapper/121:17:001
81890,0rcu_preempt54-21kswapd023:54:301
81890,0rcu_preempt19-21ksoftirqd/122:42:221
81890,0rcu_preempt19-21ksoftirqd/122:20:361
81880,0rcu_preempt54-21kswapd000:37:491
81870,0rcu_preempt54-21kswapd000:31:111
81870,0rcu_preempt19-21ksoftirqd/121:52:231
81860,0rcu_preempt19-21ksoftirqd/123:25:281
81860,0rcu_preempt19-21ksoftirqd/123:04:321
81860,0rcu_preempt19-21ksoftirqd/119:19:221
81850,0rcu_preempt19-21ksoftirqd/123:39:121
81850,0rcu_preempt19-21ksoftirqd/122:11:151
30992850,0sleep010050irq/346-484840020:13:510
81840,0rcu_preempt19-21ksoftirqd/100:04:451
81830,0rcu_preempt19-21ksoftirqd/123:21:451
81830,0rcu_preempt19-21ksoftirqd/121:10:091
81820,0rcu_preempt19-21ksoftirqd/123:31:551
81820,0rcu_preempt19-21ksoftirqd/121:20:261
81820,0rcu_preempt19-21ksoftirqd/100:23:331
81820,0rcu_preempt19-21ksoftirqd/100:01:551
81820,0rcu_preempt14151-21kworker/1:121:27:031
13282810,0sleep010050irq/346-484840020:07:190
81800,0rcu_preempt54-21kswapd021:45:071
81790,0rcu_preempt19-21ksoftirqd/123:47:051
81790,0rcu_preempt19-21ksoftirqd/100:09:581
81780,0rcu_preempt19-21ksoftirqd/123:53:051
81770,0rcu_preempt19-21ksoftirqd/120:01:121
81740,0rcu_preempt19-21ksoftirqd/122:52:571
81740,0rcu_preempt19-21ksoftirqd/100:25:081
81730,0rcu_preempt15190-21ssh21:40:021
81730,0rcu_preempt15190-21ssh21:40:021
81720,0rcu_preempt19-21ksoftirqd/122:58:141
81700,0rcu_preempt19-21ksoftirqd/119:39:061
81700,0rcu_preempt19-21ksoftirqd/119:39:061
81680,0rcu_preempt3-21ksoftirqd/021:29:330
81680,0rcu_preempt19-21ksoftirqd/120:19:361
81640,0rcu_preempt3-21ksoftirqd/022:59:410
81630,0rcu_preempt3-21ksoftirqd/019:49:320
81630,0rcu_preempt19-21ksoftirqd/119:42:181
81620,0rcu_preempt3-21ksoftirqd/021:44:430
10050620,0irq/346-484840054-21kswapd021:24:080
81610,0rcu_preempt3-21ksoftirqd/000:37:360
81610,0rcu_preempt19-21ksoftirqd/119:49:291
81600,0rcu_preempt54-21kswapd020:24:370
81590,0rcu_preempt3-21ksoftirqd/021:34:480
10050590,0irq/346-48484000-21swapper/023:46:440
81580,0rcu_preempt3-21ksoftirqd/000:07:220
10050580,0irq/346-484840054-21kswapd020:19:191
81570,0rcu_preempt54-21kswapd022:28:470
81570,0rcu_preempt3-21ksoftirqd/023:09:340
149902570,0sleep09950irq/345-484840022:59:190
81560,0rcu_preempt27879-21kworker/0:122:01:040
81560,0rcu_preempt19-21ksoftirqd/120:08:261
81560,0rcu_preempt11514-21apt-get20:39:301
81550,0rcu_preempt19-21ksoftirqd/120:59:421
81550,0rcu_preempt19-21ksoftirqd/120:13:271
81550,0rcu_preempt13148-21apt-get20:44:311
156842540,0sleep09950irq/345-484840023:39:180
81530,0rcu_preempt3-21ksoftirqd/019:47:390
81530,0rcu_preempt19-21ksoftirqd/120:25:091
81530,0rcu_preempt19-21ksoftirqd/119:54:401
81530,0rcu_preempt19-21ksoftirqd/119:09:421
81520,0rcu_preempt3-21ksoftirqd/020:56:060
81500,0rcu_preempt32429-21meminfo23:19:440
81500,0rcu_preempt30453-21ping20:14:300
81500,0rcu_preempt19-21ksoftirqd/121:04:361
81500,0rcu_preempt19-21ksoftirqd/121:04:361
81500,0rcu_preempt19-21ksoftirqd/120:49:451
81500,0rcu_preempt19-21ksoftirqd/120:29:351
136382500,0chrt9950irq/345-484840022:18:080
10050500,0irq/346-484840024162-21ssh21:12:240
81490,0rcu_preempt3-21ksoftirqd/021:03:560
81490,0rcu_preempt19-21ksoftirqd/120:34:331
81490,0rcu_preempt14029-1kworker/0:3H23:39:350
81490,0rcu_preempt13204-1kworker/0:2H23:07:460
188842490,0chrt9950irq/345-484840000:22:190
9950480,0irq/345-484840014717-1kworker/0:0H00:19:070
81480,0rcu_preempt3-21ksoftirqd/023:59:310
81480,0rcu_preempt3-21ksoftirqd/000:11:230
81480,0rcu_preempt30453-21ping20:19:380
81480,0rcu_preempt19-21ksoftirqd/119:44:461
81480,0rcu_preempt19-21ksoftirqd/119:14:391
177092480,0chrt9950irq/345-484840019:19:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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