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2026-04-29 - 07:20

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 Wed Apr 29, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811450,0rcu_preempt3-21ksoftirqd/022:18:170
811130,0rcu_preempt19-21ksoftirqd/100:08:551
811060,0rcu_preempt19-21ksoftirqd/121:43:371
81980,0rcu_preempt19-21ksoftirqd/121:34:301
81980,0rcu_preempt19-21ksoftirqd/121:16:091
81980,0rcu_preempt0-21swapper/123:22:081
81980,0rcu_preempt0-21swapper/100:06:041
81980,0rcu_preempt0-21swapper/100:06:041
81970,0rcu_preempt32458-21kworker/1:022:40:061
81960,0rcu_preempt19-21ksoftirqd/123:55:471
81960,0rcu_preempt19-21ksoftirqd/123:55:471
81960,0rcu_preempt0-21swapper/100:37:521
81950,0rcu_preempt0-21swapper/121:53:521
81940,0rcu_preempt19-21ksoftirqd/122:09:131
81930,0rcu_preempt19-21ksoftirqd/121:29:401
81930,0rcu_preempt19-21ksoftirqd/100:28:091
81930,0rcu_preempt19-21ksoftirqd/100:13:531
81920,0rcu_preempt19-21ksoftirqd/120:34:521
81900,0rcu_preempt19-21ksoftirqd/121:11:181
81900,0rcu_preempt19-21ksoftirqd/120:28:451
81890,0rcu_preempt19-21ksoftirqd/122:33:471
81880,0rcu_preempt54-21kswapd022:21:431
81880,0rcu_preempt19-21ksoftirqd/123:50:491
81880,0rcu_preempt19-21ksoftirqd/123:43:411
81880,0rcu_preempt19-21ksoftirqd/123:43:411
81880,0rcu_preempt19-21ksoftirqd/100:28:471
81860,0rcu_preempt19-21ksoftirqd/123:38:441
81860,0rcu_preempt19-21ksoftirqd/122:30:121
81860,0rcu_preempt19-21ksoftirqd/122:28:081
81850,0rcu_preempt19-21ksoftirqd/123:03:181
81850,0rcu_preempt19-21ksoftirqd/123:03:181
81850,0rcu_preempt19-21ksoftirqd/119:18:341
81840,0rcu_preempt19-21ksoftirqd/122:45:461
81830,0rcu_preempt30796-21diskmemload23:13:341
81830,0rcu_preempt19-21ksoftirqd/123:36:461
81830,0rcu_preempt19-21ksoftirqd/119:48:511
81810,0rcu_preempt19-21ksoftirqd/122:48:461
81800,0rcu_preempt19-21ksoftirqd/122:58:421
81800,0rcu_preempt19-21ksoftirqd/119:58:421
10050800,0irq/346-484840054-21kswapd023:23:290
81790,0rcu_preempt19-21ksoftirqd/120:23:171
81780,0rcu_preempt19-21ksoftirqd/122:07:161
81780,0rcu_preempt19-21ksoftirqd/121:48:451
81780,0rcu_preempt19-21ksoftirqd/100:18:311
81770,0rcu_preempt19-21ksoftirqd/122:13:491
81770,0rcu_preempt19-21ksoftirqd/121:28:061
81770,0rcu_preempt19-21ksoftirqd/121:18:441
81760,0rcu_preempt19-21ksoftirqd/120:11:541
81760,0rcu_preempt19-21ksoftirqd/120:11:541
81750,0rcu_preempt30796-21diskmemload23:58:351
81750,0rcu_preempt19-21ksoftirqd/119:43:461
81750,0rcu_preempt19-21ksoftirqd/119:33:331
81740,0rcu_preempt19-21ksoftirqd/120:06:161
81730,0rcu_preempt3-21ksoftirqd/000:37:220
81730,0rcu_preempt19-21ksoftirqd/123:08:191
81730,0rcu_preempt19-21ksoftirqd/122:54:221
81730,0rcu_preempt19-21ksoftirqd/119:23:431
10050730,0irq/346-484840021675-1kworker/0:0H23:53:260
10050730,0irq/346-484840021675-1kworker/0:0H23:53:260
81720,0rcu_preempt6800-21irqstats19:53:391
81720,0rcu_preempt6800-21irqstats19:53:391
81720,0rcu_preempt19-21ksoftirqd/119:28:581
81710,0rcu_preempt32458-21kworker/1:021:59:511
81710,0rcu_preempt19-21ksoftirqd/121:43:181
81710,0rcu_preempt19-21ksoftirqd/120:15:311
10050710,0irq/346-48484007776-1kworker/0:0H22:34:350
81700,0rcu_preempt19-21ksoftirqd/119:40:531
10050700,0irq/346-48484002325-1kworker/0:2H00:30:250
81690,0rcu_preempt19-21ksoftirqd/120:43:391
81690,0rcu_preempt19-21ksoftirqd/120:22:551
10050690,0irq/346-484840028263-1kworker/0:1H22:12:100
81680,0rcu_preempt19-21ksoftirqd/123:27:391
81670,0rcu_preempt19-21ksoftirqd/123:29:331
81660,0rcu_preempt54-21kswapd021:34:110
81660,0rcu_preempt19-21ksoftirqd/120:53:351
81650,0rcu_preempt19-21ksoftirqd/121:03:311
81640,0rcu_preempt19-21ksoftirqd/120:58:361
81630,0rcu_preempt19-21ksoftirqd/120:48:431
81600,0rcu_preempt19-21ksoftirqd/119:15:591
81590,0rcu_preempt23801-21cyclictest19:12:451
81580,0rcu_preempt3-21ksoftirqd/020:53:170
81570,0rcu_preempt3-21ksoftirqd/022:38:180
81550,0rcu_preempt19-21ksoftirqd/120:38:311
10050550,0irq/346-48484000-21swapper/019:58:160
10050550,0irq/346-48484000-21swapper/019:58:160
10050540,0irq/346-484840028992-21kernelversion21:38:390
10050530,0irq/346-484840022526-1kworker/0:2H22:05:230
81520,0rcu_preempt3-21ksoftirqd/023:03:180
10050520,0irq/346-48484007626-21aten_rapower_po23:28:300
10050520,0irq/346-484840014919-1kworker/0:1H22:30:270
10050500,0irq/346-484840054-21kswapd021:28:310
10050500,0irq/346-48484002280-1kworker/0:2H22:50:290
81490,0rcu_preempt3-21ksoftirqd/020:18:420
81480,0rcu_preempt2859-21kworker/u4:023:03:200
81480,0rcu_preempt2859-21kworker/u4:023:03:200
10050480,0irq/346-48484009416-21kworker/0:220:13:290
10050480,0irq/346-48484008017-1kworker/0:0H23:20:160
10050480,0irq/346-484840030522-1kworker/0:0H21:16:550
10050480,0irq/346-48484001907-1kworker/0:2H00:20:340
10050480,0irq/346-48484000-21swapper/021:46:500
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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