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2026-04-20 - 19:39

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 Mon Apr 20, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81910,0rcu_preempt3-21ksoftirqd/007:43:530
81830,0rcu_preempt3-21ksoftirqd/007:26:060
81750,0rcu_preempt3-21ksoftirqd/009:15:200
81740,0rcu_preempt3-21ksoftirqd/009:46:110
81740,0rcu_preempt19-21ksoftirqd/111:09:071
81710,0rcu_preempt3-21ksoftirqd/010:11:480
81680,0rcu_preempt3-21ksoftirqd/012:16:290
81680,0rcu_preempt3-21ksoftirqd/012:16:290
81680,0rcu_preempt3-21ksoftirqd/011:38:440
81670,0rcu_preempt851-21rngd07:36:490
10050670,0irq/346-484840054-21kswapd010:03:410
10050670,0irq/346-484840054-21kswapd010:03:410
81660,0rcu_preempt3-21ksoftirqd/010:38:530
81660,0rcu_preempt3-21ksoftirqd/010:38:530
81660,0rcu_preempt3-21ksoftirqd/010:31:090
81650,0rcu_preempt3-21ksoftirqd/009:38:540
81650,0rcu_preempt3-21ksoftirqd/008:13:460
81650,0rcu_preempt12600-21apt-get08:48:370
81640,0rcu_preempt3-21ksoftirqd/009:48:510
12040996424,0cyclictest27217-21ssh12:32:140
81630,0rcu_preempt3-21ksoftirqd/011:58:530
81630,0rcu_preempt3-21ksoftirqd/008:23:530
81630,0rcu_preempt3-21ksoftirqd/008:08:450
81630,0rcu_preempt3-21ksoftirqd/007:58:460
81630,0rcu_preempt15053-1kworker/0:3H07:19:570
9950620,0irq/345-48484001256-1kworker/1:0H10:28:301
81620,0rcu_preempt4221-21ssh09:58:370
81620,0rcu_preempt3-21ksoftirqd/009:29:510
10050620,0irq/346-48484008858-1kworker/1:3H09:35:001
10050620,0irq/346-484840028896-1kworker/1:1H09:21:571
81610,0rcu_preempt7344-21ntpq10:33:520
81610,0rcu_preempt3-21ksoftirqd/012:28:150
81610,0rcu_preempt3-21ksoftirqd/011:53:430
10050610,0irq/346-484840015769-1kworker/1:1H11:51:281
10050610,0irq/346-484840013837-1kworker/1:0H09:52:311
9950600,0irq/345-484840028896-1kworker/1:1H09:41:531
81600,0rcu_preempt3-21ksoftirqd/010:48:420
81600,0rcu_preempt3-21ksoftirqd/008:53:530
81600,0rcu_preempt3-21ksoftirqd/008:43:380
81600,0rcu_preempt3-21ksoftirqd/007:48:510
81590,0rcu_preempt3-21ksoftirqd/011:36:200
81590,0rcu_preempt3-21ksoftirqd/008:33:510
81590,0rcu_preempt3-21ksoftirqd/008:03:470
10050590,0irq/346-48484009327-1kworker/1:2H12:29:381
10050590,0irq/346-484840054-21kswapd011:22:441
10050590,0irq/346-484840054-21kswapd010:35:531
81580,0rcu_preempt3-21ksoftirqd/011:48:440
81580,0rcu_preempt3-21ksoftirqd/011:28:410
81580,0rcu_preempt3-21ksoftirqd/009:04:420
81580,0rcu_preempt19-21ksoftirqd/112:34:551
10050580,0irq/346-484840030389-1kworker/1:0H10:59:391
10050580,0irq/346-484840026086-1kworker/1:0H11:27:431
10050580,0irq/346-484840015769-1kworker/1:1H11:53:581
81570,0rcu_preempt3-21ksoftirqd/011:23:360
81570,0rcu_preempt19-21ksoftirqd/109:53:391
10050570,0irq/346-48484008517-1kworker/1:0H11:47:541
10050570,0irq/346-48484008517-1kworker/1:0H11:40:431
10050570,0irq/346-484840020107-21ssh10:13:530
10050570,0irq/346-48484001345-1kworker/1:2H09:58:581
10050570,0irq/346-484840011220-1kworker/0:0H11:12:410
81560,0rcu_preempt3-21ksoftirqd/012:21:050
10050560,0irq/346-484840054-21kswapd009:09:570
10050560,0irq/346-48484003593-1kworker/1:3H11:58:581
10050560,0irq/346-48484001345-1kworker/1:2H10:04:131
10050560,0irq/346-48484001345-1kworker/1:2H10:04:131
81550,0rcu_preempt3-21ksoftirqd/012:03:370
81550,0rcu_preempt3-21ksoftirqd/010:18:400
81550,0rcu_preempt3-21ksoftirqd/008:28:510
81550,0rcu_preempt3-21ksoftirqd/008:18:520
81550,0rcu_preempt29217-21kworker/0:110:28:230
10050550,0irq/346-484840054-21kswapd010:55:250
10050550,0irq/346-484840054-21kswapd010:11:331
10050550,0irq/346-484840021375-1kworker/1:0H09:13:061
81540,0rcu_preempt3-21ksoftirqd/011:43:530
81540,0rcu_preempt3-21ksoftirqd/011:13:370
81540,0rcu_preempt3-21ksoftirqd/009:21:310
12040995425,0cyclictest1473-1kworker/0:2H09:33:490
10050540,0irq/346-484840054-21kswapd010:45:351
10050540,0irq/346-484840054-21kswapd009:31:081
10050540,0irq/346-484840054-21kswapd009:16:521
10050540,0irq/346-484840015167-1kworker/1:1H12:25:021
81530,0rcu_preempt3-21ksoftirqd/012:33:390
12040995337,0cyclictest19018-21diskmemload12:12:480
12040995326,0cyclictest1850250kworker/0:1H11:20:480
10050530,0irq/346-484840054-21kswapd012:18:111
10050530,0irq/346-484840054-21kswapd012:18:111
10050530,0irq/346-484840021399-1kworker/1:2H09:43:421
10050530,0irq/346-484840019814-1kworker/1:1H10:39:271
10050530,0irq/346-484840019814-1kworker/1:1H10:39:271
10050530,0irq/346-484840013780-1kworker/1:3H10:48:341
81520,0rcu_preempt3874-21kworker/0:109:25:250
81520,0rcu_preempt3-21ksoftirqd/010:45:030
81520,0rcu_preempt10278-21unixbench_multi08:38:550
12040995236,0cyclictest19018-21diskmemload09:54:150
12040995225,0cyclictest31070-1kworker/0:1H10:59:140
10050520,0irq/346-484840054-21kswapd012:13:241
81510,0rcu_preempt3-21ksoftirqd/007:12:250
81510,0rcu_preempt30386-21ssh10:57:311
12040995132,0cyclictest19018-21diskmemload11:07:080
10050510,0irq/346-484840054-21kswapd011:13:531
10050510,0irq/346-484840054-21kswapd010:22:421
10050510,0irq/346-48484004238-1kworker/1:1H11:05:031
10050510,0irq/346-48484001345-1kworker/1:2H10:15:031
10050510,0irq/346-484840012039-21cyclictest11:35:031
81500,0rcu_preempt3-21ksoftirqd/007:53:430
12040995028,0cyclictest15324-21ping07:28:550
10050500,0irq/346-484840054-21kswapd010:24:071
10050500,0irq/346-484840028896-1kworker/1:1H09:23:451
81490,0rcu_preempt3-21ksoftirqd/007:03:470
81490,0rcu_preempt19-21ksoftirqd/112:03:501
10050490,0irq/346-484840026086-1kworker/1:0H11:30:341
10050490,0irq/346-484840016882-21ssh12:21:461
81480,0rcu_preempt3874-21kworker/0:108:58:380
81480,0rcu_preempt3-21ksoftirqd/007:13:490
9950470,0irq/345-484840015324-21ping07:33:461
12040994723,0cyclictest15324-21ping07:38:570
81460,0rcu_preempt19-21ksoftirqd/107:29:011
81450,0rcu_preempt19-21ksoftirqd/108:58:341
81450,0rcu_preempt19-21ksoftirqd/107:43:591
81450,0rcu_preempt19-21ksoftirqd/107:43:221
81440,0rcu_preempt19-21ksoftirqd/107:18:271
81430,0rcu_preempt19-21ksoftirqd/108:18:261
81420,0rcu_preempt19-21ksoftirqd/108:13:261
81420,0rcu_preempt19-21ksoftirqd/107:58:511
81420,0rcu_preempt19-21ksoftirqd/107:23:371
81410,0rcu_preempt12157-21sed07:08:261
81400,0rcu_preempt19-21ksoftirqd/109:08:261
81400,0rcu_preempt19-21ksoftirqd/107:48:461
81390,0rcu_preempt19-21ksoftirqd/108:43:551
81390,0rcu_preempt19-21ksoftirqd/108:38:251
81390,0rcu_preempt19-21ksoftirqd/108:23:521
81390,0rcu_preempt19-21ksoftirqd/108:13:471
81390,0rcu_preempt19-21ksoftirqd/107:18:261
81380,0rcu_preempt19-21ksoftirqd/108:50:551
81380,0rcu_preempt19-21ksoftirqd/107:58:251
81370,0rcu_preempt19-21ksoftirqd/107:03:251
81360,0rcu_preempt12039-21cyclictest08:28:431
81350,0rcu_preempt19-21ksoftirqd/108:40:011
10050350,0irq/346-48484000-21swapper/108:03:531
156332330,0sleep113753-1kworker/1:3H08:57:331
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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