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2025-12-10 - 15:59

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 highest latencies:
System rackaslot5s.osadl.org (updated Wed Dec 10, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811400,0rcu_preempt2773-1kworker/1:2H23:53:461
811240,0rcu_preempt19-21ksoftirqd/119:34:331
10050850,0irq/346-4848400111rcuc/022:27:430
81830,0rcu_preempt19-21ksoftirqd/100:31:151
81830,0rcu_preempt19-21ksoftirqd/100:31:151
10050790,0irq/346-4848400111rcuc/023:13:140
81750,0rcu_preempt3-21ksoftirqd/021:12:190
81750,0rcu_preempt19-21ksoftirqd/121:22:451
10050740,0irq/346-4848400111rcuc/021:26:000
98842720,0sleep010050irq/346-484840019:57:210
10050720,0irq/346-4848400111rcuc/000:01:170
10050700,0irq/346-4848400111rcuc/023:20:110
10050700,0irq/346-4848400111rcuc/022:08:360
81690,0rcu_preempt3-21ksoftirqd/020:24:320
81680,0rcu_preempt19-21ksoftirqd/122:09:041
10050680,0irq/346-484840054-21kswapd000:09:390
81670,0rcu_preempt19-21ksoftirqd/122:33:591
10050670,0irq/346-4848400111rcuc/021:48:530
81660,0rcu_preempt19-21ksoftirqd/100:13:521
10050660,0irq/346-48484003301-1kworker/0:0H21:16:010
81650,0rcu_preempt0-21swapper/121:47:311
2611199653,0cyclictest0-21swapper/000:32:250
2611199653,0cyclictest0-21swapper/000:32:250
81640,0rcu_preempt19-21ksoftirqd/123:33:351
81640,0rcu_preempt19-21ksoftirqd/122:01:511
81640,0rcu_preempt19-21ksoftirqd/100:20:361
81640,0rcu_preempt19-21ksoftirqd/100:20:361
2611199643,0cyclictest0-21swapper/000:39:030
2611199643,0cyclictest0-21swapper/000:39:030
116972640,0sleep010050irq/346-484840020:04:070
81630,0rcu_preempt19-21ksoftirqd/122:52:591
81630,0rcu_preempt19-21ksoftirqd/122:35:131
81620,0rcu_preempt19-21ksoftirqd/123:44:521
81620,0rcu_preempt19-21ksoftirqd/123:03:031
81620,0rcu_preempt19-21ksoftirqd/121:26:321
81620,0rcu_preempt19-21ksoftirqd/120:10:541
81620,0rcu_preempt19-21ksoftirqd/100:19:031
81620,0rcu_preempt19-21ksoftirqd/100:03:121
2611199629,0cyclictest0-21swapper/022:57:410
81610,0rcu_preempt54-21kswapd021:00:420
81610,0rcu_preempt19-21ksoftirqd/123:22:461
81610,0rcu_preempt19-21ksoftirqd/123:15:531
81610,0rcu_preempt19-21ksoftirqd/123:09:131
81610,0rcu_preempt19-21ksoftirqd/121:13:441
81610,0rcu_preempt19-21ksoftirqd/119:49:481
81610,0rcu_preempt19-21ksoftirqd/100:35:011
81610,0rcu_preempt19-21ksoftirqd/100:35:011
81610,0rcu_preempt19-21ksoftirqd/100:27:141
2611199617,0cyclictest16690-21latency_hist20:19:190
26111996113,0cyclictest0-21swapper/023:29:290
81600,0rcu_preempt19-21ksoftirqd/123:41:231
81600,0rcu_preempt19-21ksoftirqd/123:28:231
81600,0rcu_preempt19-21ksoftirqd/122:45:281
81600,0rcu_preempt19-21ksoftirqd/122:25:211
26111996012,0cyclictest0-21swapper/019:29:510
81590,0rcu_preempt3-21ksoftirqd/000:19:320
81590,0rcu_preempt3-21ksoftirqd/000:19:320
81590,0rcu_preempt3-21ksoftirqd/000:09:050
81590,0rcu_preempt19-21ksoftirqd/123:54:401
81590,0rcu_preempt19-21ksoftirqd/123:09:331
81590,0rcu_preempt19-21ksoftirqd/122:59:081
81590,0rcu_preempt19-21ksoftirqd/122:40:281
81590,0rcu_preempt19-21ksoftirqd/122:09:481
81590,0rcu_preempt19-21ksoftirqd/100:07:471
2611199592,0cyclictest29384-21ping19:19:310
26111995912,0cyclictest0-21swapper/019:24:330
2611199591,0cyclictest22724-1kworker/0:1H21:36:260
81580,0rcu_preempt19-21ksoftirqd/121:37:511
2611199589,0cyclictest9828-21ping20:19:470
2611199589,0cyclictest0-21swapper/023:54:400
2611199587,0cyclictest0-21swapper/021:59:190
2611199582,0cyclictest29384-21ping19:39:290
81570,0rcu_preempt19-21ksoftirqd/122:21:081
81570,0rcu_preempt19-21ksoftirqd/121:42:131
81570,0rcu_preempt19-21ksoftirqd/119:44:081
81570,0rcu_preempt19-21ksoftirqd/119:29:431
2611199578,0cyclictest0-21swapper/022:11:540
2611199572,0cyclictest2628-21meminfo19:34:490
26111995712,0cyclictest0-21swapper/019:46:030
81560,0rcu_preempt26087-21kworker/0:019:14:310
81560,0rcu_preempt26087-21kworker/0:019:14:310
2611199562,0cyclictest0-21swapper/021:43:060
2611199561,0cyclictest0-21swapper/022:35:400
10050560,0irq/346-48484002641-1kworker/1:0H21:14:381
10050560,0irq/346-484840021406-1kworker/1:0H21:49:351
81550,0rcu_preempt19-21ksoftirqd/120:24:311
81550,0rcu_preempt19-21ksoftirqd/119:20:261
2611199555,0cyclictest3-21ksoftirqd/022:40:500
2611199552,0cyclictest0-21swapper/023:28:260
10050550,0irq/346-48484004667-21ssh23:43:550
81540,0rcu_preempt3-21ksoftirqd/022:19:190
81540,0rcu_preempt3-21ksoftirqd/022:19:190
81540,0rcu_preempt3-21ksoftirqd/000:14:290
81540,0rcu_preempt19-21ksoftirqd/120:14:341
2611199545,0cyclictest0-21swapper/021:22:320
2611199541,0cyclictest0-21swapper/023:50:420
10050540,0irq/346-484840054-21kswapd021:54:241
10050540,0irq/346-484840054-21kswapd021:29:411
81530,0rcu_preempt3-21ksoftirqd/022:29:320
81530,0rcu_preempt19-21ksoftirqd/123:35:361
81530,0rcu_preempt19-21ksoftirqd/123:35:361
10050530,0irq/346-484840054-21kswapd021:04:430
81520,0rcu_preempt3712-21ssh21:49:470
81520,0rcu_preempt3-21ksoftirqd/023:48:470
81520,0rcu_preempt3-21ksoftirqd/023:14:300
81520,0rcu_preempt19-21ksoftirqd/120:05:011
10050520,0irq/346-484840018368-21diskstats21:29:360
81510,0rcu_preempt19-21ksoftirqd/122:14:301
81510,0rcu_preempt19-21ksoftirqd/122:14:301
81510,0rcu_preempt0-21swapper/119:18:051
81510,0rcu_preempt0-21swapper/119:18:051
81500,0rcu_preempt3-21ksoftirqd/020:08:390
81500,0rcu_preempt19-21ksoftirqd/120:59:181
10050500,0irq/346-484840054-21kswapd023:03:550
10050500,0irq/346-48484003-21ksoftirqd/020:09:530
81490,0rcu_preempt3-21ksoftirqd/020:49:470
81490,0rcu_preempt29908-21apt-get20:59:301
81480,0rcu_preempt568-21diskmemload22:44:340
81480,0rcu_preempt19-21ksoftirqd/119:28:341
81480,0rcu_preempt15615-21kworker/0:119:04:460
81470,0rcu_preempt19-21ksoftirqd/119:44:311
10050470,0irq/346-484840054-21kswapd023:05:200
81460,0rcu_preempt54-21kswapd022:03:190
81460,0rcu_preempt54-21kswapd019:59:191
81460,0rcu_preempt3-21ksoftirqd/020:29:390
81460,0rcu_preempt3-21ksoftirqd/000:27:510
81460,0rcu_preempt28469-21diskstats20:54:370
81460,0rcu_preempt21902-21diskstats20:34:340
10050460,0irq/346-484840054-21kswapd022:49:430
10050460,0irq/346-48484000-21swapper/023:38:470
10050460,0irq/346-48484000-21swapper/023:38:470
81450,0rcu_preempt3-21ksoftirqd/022:19:300
81450,0rcu_preempt16585-21kworker/1:020:19:511
81440,0rcu_preempt26087-21kworker/0:019:09:330
81440,0rcu_preempt19-21ksoftirqd/119:59:351
81430,0rcu_preempt19-21ksoftirqd/120:39:461
81420,0rcu_preempt3-21ksoftirqd/020:44:300
81420,0rcu_preempt24981-21apt-get20:44:311
81400,0rcu_preempt3-21ksoftirqd/020:39:450
81400,0rcu_preempt19-21ksoftirqd/121:07:231
81400,0rcu_preempt19-21ksoftirqd/120:53:471
81400,0rcu_preempt19-21ksoftirqd/120:36:581
81400,0rcu_preempt19-21ksoftirqd/119:04:331
81400,0rcu_preempt0-21swapper/119:11:131
81390,0rcu_preempt19-21ksoftirqd/120:29:581
81380,0rcu_preempt3-21ksoftirqd/019:49:410
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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