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2025-12-07 - 18:04

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 Sun Dec 07, 2025 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811180,0rcu_preempt19-21ksoftirqd/111:54:431
81950,0rcu_preempt19-21ksoftirqd/110:49:541
10050790,0irq/346-48484001222-1kworker/0:3H11:55:370
303662770,0chrt9950irq/345-484840008:22:580
10050760,0irq/346-484840054-21kswapd012:32:410
10050760,0irq/346-484840054-21kswapd009:35:590
10050740,0irq/346-484840054-21kswapd010:18:010
81720,0rcu_preempt16941-21apt-get09:59:330
10050720,0irq/346-48484000-21swapper/012:36:240
286642700,0sleep010050irq/346-484840008:17:270
286642700,0sleep010050irq/346-484840008:17:270
10050690,0irq/346-48484000-21swapper/012:12:380
10050690,0irq/346-48484000-21swapper/010:48:350
81670,0rcu_preempt30988-1kworker/0:4H11:03:350
81660,0rcu_preempt3-21ksoftirqd/010:58:510
81630,0rcu_preempt19-21ksoftirqd/111:45:171
52562610,0sleep19950irq/345-484840010:25:261
10050610,0irq/346-484840025408-1kworker/1:1H09:45:161
10050610,0irq/346-484840012662-1kworker/1:3H12:10:231
81600,0rcu_preempt19-21ksoftirqd/112:03:121
81600,0rcu_preempt19-21ksoftirqd/112:03:121
13150600,0irq/301-48020000-21swapper/010:49:450
10050600,0irq/346-484840054-21kswapd010:54:521
9950580,0irq/345-48484000-21swapper/110:14:001
81580,0rcu_preempt751-21rngd09:40:001
81570,0rcu_preempt1144-21ntpd10:19:411
238842570,0sleep010050irq/346-484840008:03:440
10050570,0irq/346-48484005868-1kworker/1:2H10:36:231
10050570,0irq/346-484840054-21kswapd012:06:111
10050570,0irq/346-48484005239-1kworker/1:0H12:31:561
9950560,0irq/345-4848400181ktimersoftd/107:54:431
81560,0rcu_preempt3-21ksoftirqd/011:19:320
81560,0rcu_preempt19-21ksoftirqd/109:56:011
81550,0rcu_preempt3-21ksoftirqd/011:33:080
81550,0rcu_preempt3-21ksoftirqd/009:44:400
81550,0rcu_preempt19-21ksoftirqd/112:14:411
81550,0rcu_preempt19-21ksoftirqd/110:41:561
10050550,0irq/346-484840054-21kswapd011:52:060
10050550,0irq/346-484840054-21kswapd009:40:180
10050550,0irq/346-484840054-21kswapd009:25:100
9950540,0irq/345-48484000-21swapper/011:36:090
81540,0rcu_preempt3-21ksoftirqd/011:39:310
81540,0rcu_preempt3-21ksoftirqd/010:39:320
81540,0rcu_preempt3-21ksoftirqd/009:56:430
81540,0rcu_preempt15496-1kworker/0:0H07:44:570
81540,0rcu_preempt15496-1kworker/0:0H07:44:570
81540,0rcu_preempt0-21swapper/109:16:211
81540,0rcu_preempt0-21swapper/109:16:211
111540,0rcuc/024756-1kworker/0:0H12:16:270
10050540,0irq/346-484840054-21kswapd011:37:381
10050540,0irq/346-484840022911-21ssh10:06:331
81530,0rcu_preempt3-21ksoftirqd/007:14:330
9950520,0irq/345-4848400751-21rngd09:49:371
81520,0rcu_preempt3-21ksoftirqd/010:09:310
10050520,0irq/346-48484009285-1kworker/0:1H12:00:350
10050520,0irq/346-48484009285-1kworker/0:1H12:00:350
10050520,0irq/346-484840054-21kswapd012:34:451
10050520,0irq/346-484840054-21kswapd009:21:511
10050520,0irq/346-484840031457-21ssh12:24:340
10050520,0irq/346-484840028865-1kworker/1:4H11:40:561
10050520,0irq/346-484840013239-1kworker/0:3H12:04:420
81510,0rcu_preempt6446-21apt-get08:49:320
81510,0rcu_preempt3-21ksoftirqd/007:04:360
81510,0rcu_preempt19-21ksoftirqd/107:41:471
221472510,0sleep010050irq/346-484840007:57:470
10050510,0irq/346-4848400751-21rngd09:17:030
10050510,0irq/346-4848400751-21rngd09:17:030
10050510,0irq/346-484840054-21kswapd012:24:271
10050510,0irq/346-484840025557-1kworker/1:2H11:49:361
81500,0rcu_preempt54-21kswapd008:24:400
81500,0rcu_preempt3-21ksoftirqd/011:09:560
81500,0rcu_preempt3-21ksoftirqd/010:28:070
81500,0rcu_preempt3-21ksoftirqd/008:04:460
81500,0rcu_preempt19-21ksoftirqd/109:25:461
81500,0rcu_preempt19-21ksoftirqd/107:45:231
81500,0rcu_preempt19-21ksoftirqd/107:45:231
81500,0rcu_preempt1850-21kworker/1:110:29:391
81500,0rcu_preempt12223-21diskmemload11:44:320
10050500,0irq/346-484840054-21kswapd009:39:211
10050500,0irq/346-484840028552-21ssh12:20:301
10050500,0irq/346-484840019060-1kworker/1:4H10:04:001
10050500,0irq/346-484840010512-1kworker/1:0H11:19:111
10050500,0irq/346-48484000-21swapper/009:53:300
9950490,0irq/345-48484000-21swapper/010:33:390
81490,0rcu_preempt6112-21apt-get07:09:320
81490,0rcu_preempt32460-21apt-get10:19:330
81490,0rcu_preempt3-21ksoftirqd/010:05:560
81490,0rcu_preempt3-21ksoftirqd/008:44:370
81490,0rcu_preempt3-21ksoftirqd/007:49:500
81490,0rcu_preempt3-21ksoftirqd/007:40:010
81490,0rcu_preempt19-21ksoftirqd/107:59:401
269832490,0chrt9950irq/345-484840012:19:240
10050490,0irq/346-484840054-21kswapd011:33:441
10050490,0irq/346-484840054-21kswapd011:01:271
10050490,0irq/346-484840019-21ksoftirqd/111:19:571
10050490,0irq/346-48484000-21swapper/009:19:330
9950480,0irq/345-48484000-21swapper/107:19:221
81480,0rcu_preempt9273-21kworker/0:109:11:190
81480,0rcu_preempt3-21ksoftirqd/011:27:300
81480,0rcu_preempt3-21ksoftirqd/008:59:450
81480,0rcu_preempt19-21ksoftirqd/109:09:471
81480,0rcu_preempt19-21ksoftirqd/108:09:411
81480,0rcu_preempt19-21ksoftirqd/107:29:381
81480,0rcu_preempt0-21swapper/110:16:041
81480,0rcu_preempt0-21swapper/109:32:341
10050480,0irq/346-48484000-21swapper/010:37:510
9950470,0irq/345-48484000-21swapper/011:04:330
81470,0rcu_preempt3-21ksoftirqd/009:29:450
81470,0rcu_preempt3-21ksoftirqd/009:08:370
81470,0rcu_preempt3-21ksoftirqd/008:09:490
81470,0rcu_preempt30489-21kworker/0:008:34:330
81470,0rcu_preempt19-21ksoftirqd/111:28:511
81470,0rcu_preempt19-21ksoftirqd/111:11:531
81470,0rcu_preempt19-21ksoftirqd/108:14:391
81470,0rcu_preempt19-21ksoftirqd/108:14:391
81470,0rcu_preempt19-21ksoftirqd/108:04:421
81470,0rcu_preempt19-21ksoftirqd/107:26:141
10050470,0irq/346-484840054-21kswapd011:16:340
9950460,0irq/345-48484000-21swapper/007:37:230
81460,0rcu_preempt19-21ksoftirqd/107:39:221
81460,0rcu_preempt0-21swapper/107:09:311
10050460,0irq/346-484840020462-1kworker/1:1H10:47:271
81450,0rcu_preempt22103-21ping08:19:441
81450,0rcu_preempt19-21ksoftirqd/111:04:321
81450,0rcu_preempt19-21ksoftirqd/108:39:431
10050450,0irq/346-48484002707-1kworker/0:0H08:39:230
81440,0rcu_preempt402-21memory08:29:420
81440,0rcu_preempt19-21ksoftirqd/108:29:391
81440,0rcu_preempt19-21ksoftirqd/108:26:211
81440,0rcu_preempt19-21ksoftirqd/107:49:221
81430,0rcu_preempt19-21ksoftirqd/108:34:321
10050430,0irq/346-48484008918-1kworker/1:0H07:19:201
10050430,0irq/346-48484007639-1kworker/0:3H08:54:310
13150420,0irq/301-48020009239-21ping07:19:410
81410,0rcu_preempt9239-21ping07:24:540
81400,0rcu_preempt19-21ksoftirqd/109:08:001
81400,0rcu_preempt19-21ksoftirqd/108:59:371
81400,0rcu_preempt19-21ksoftirqd/108:49:491
81400,0rcu_preempt19-21ksoftirqd/107:04:361
5965994015,0cyclictest0-21swapper/007:29:480
81390,0rcu_preempt19-21ksoftirqd/108:49:201
81380,0rcu_preempt19-21ksoftirqd/108:54:271
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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