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2026-06-01 - 22:52

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 Jun 01, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81990,0rcu_preempt19-21ksoftirqd/110:36:131
81930,0rcu_preempt19-21ksoftirqd/110:46:591
81820,0rcu_preempt19-21ksoftirqd/110:14:111
81810,0rcu_preempt54-21kswapd011:53:121
81760,0rcu_preempt3-21ksoftirqd/011:14:040
81740,0rcu_preempt19-21ksoftirqd/107:13:511
81730,0rcu_preempt54-21kswapd011:19:021
10050690,0irq/346-48484000-21swapper/012:18:050
10050680,0irq/346-484840054-21kswapd010:11:520
81670,0rcu_preempt19-21ksoftirqd/112:17:261
81660,0rcu_preempt3-21ksoftirqd/011:43:170
81660,0rcu_preempt19-21ksoftirqd/110:55:271
10050650,0irq/346-484840054-21kswapd009:17:450
10050650,0irq/346-48484000-21swapper/010:49:200
10050650,0irq/346-48484000-21swapper/010:49:200
10050650,0irq/346-48484000-21swapper/010:22:230
81630,0rcu_preempt3-21ksoftirqd/009:20:040
10050630,0irq/346-484840054-21kswapd012:32:010
10050630,0irq/346-484840014326-1kworker/1:1H12:28:431
10050630,0irq/346-48484000-21swapper/012:23:230
10050630,0irq/346-48484000-21swapper/012:23:230
10050630,0irq/346-48484000-21swapper/010:28:220
10050620,0irq/346-484840054-21kswapd012:12:010
10050620,0irq/346-48484000-21swapper/011:54:030
81610,0rcu_preempt10050irq/346-484840010:43:220
10050600,0irq/346-48484003-21ksoftirqd/011:35:520
10050600,0irq/346-484840023561-1kworker/1:0H09:21:441
10050600,0irq/346-484840018266-1kworker/1:1H10:22:361
81590,0rcu_preempt54-21kswapd010:59:440
81590,0rcu_preempt54-21kswapd010:59:440
81580,0rcu_preempt3-21ksoftirqd/008:23:170
10050580,0irq/346-484840028803-1kworker/1:3H11:35:091
10050570,0irq/346-48484003744-1kworker/1:2H11:12:441
10050570,0irq/346-484840031994-1kworker/1:3H09:30:431
10050560,0irq/346-484840025549-1kworker/1:2H09:58:331
81550,0rcu_preempt54-21kswapd007:57:540
81550,0rcu_preempt3-21ksoftirqd/007:12:560
10050550,0irq/346-48484004516-21if_can011:43:021
10050550,0irq/346-484840018266-1kworker/1:1H10:25:261
10050550,0irq/346-484840016002-1kworker/1:1H11:04:371
10050550,0irq/346-484840013536-1kworker/1:0H09:13:211
81540,0rcu_preempt54-21kswapd010:04:010
81540,0rcu_preempt3-21ksoftirqd/009:23:400
10050540,0irq/346-4848400851-21rngd11:09:380
10050540,0irq/346-484840054-21kswapd012:23:571
10050540,0irq/346-484840054-21kswapd012:23:571
10050540,0irq/346-484840054-21kswapd012:20:571
10050540,0irq/346-484840054-21kswapd010:08:131
10050540,0irq/346-484840016523-1kworker/1:0H11:59:561
81530,0rcu_preempt851-21rngd10:15:140
353499531,0cyclictest6816-21ping07:23:000
10050530,0irq/346-484840054-21kswapd010:40:431
10050530,0irq/346-484840054-21kswapd010:37:100
10050530,0irq/346-484840010487-1kworker/1:1H09:43:031
81520,0rcu_preempt3-21ksoftirqd/011:05:590
81520,0rcu_preempt19-21ksoftirqd/110:48:021
81520,0rcu_preempt19-21ksoftirqd/110:48:021
10050520,0irq/346-484840054-21kswapd012:05:321
10050520,0irq/346-484840054-21kswapd010:29:441
10050520,0irq/346-484840054-21kswapd009:54:041
10050520,0irq/346-484840054-21kswapd009:26:301
10050520,0irq/346-48484003209-1kworker/1:2H10:06:511
10050510,0irq/346-48484009422-21ssh11:48:001
10050510,0irq/346-484840054-21kswapd011:50:500
10050510,0irq/346-484840054-21kswapd011:38:451
10050510,0irq/346-484840054-21kswapd009:10:040
81500,0rcu_preempt3-21ksoftirqd/011:18:110
81500,0rcu_preempt3-21ksoftirqd/009:38:020
81500,0rcu_preempt3-21ksoftirqd/008:29:580
81500,0rcu_preempt3-21ksoftirqd/008:21:130
81500,0rcu_preempt19-21ksoftirqd/107:58:141
10050500,0irq/346-484840054-21kswapd011:29:191
10050500,0irq/346-484840054-21kswapd009:35:331
10050500,0irq/346-484840023563-1kworker/0:0H09:33:570
10050500,0irq/346-484840010842-21ssh11:17:111
10050500,0irq/346-48484000-21swapper/011:58:230
81490,0rcu_preempt54-21kswapd009:50:280
81490,0rcu_preempt3-21ksoftirqd/010:53:050
81490,0rcu_preempt3-21ksoftirqd/009:28:080
81490,0rcu_preempt3-21ksoftirqd/008:08:050
81490,0rcu_preempt2030-21apt-get07:02:560
81490,0rcu_preempt19-21ksoftirqd/108:17:451
81490,0rcu_preempt1470-21runrttasks07:55:020
10050490,0irq/346-48484008741-1kworker/0:2H09:44:200
10050490,0irq/346-484840054-21kswapd011:27:520
81480,0rcu_preempt3-21ksoftirqd/011:38:210
81480,0rcu_preempt3-21ksoftirqd/010:39:330
81480,0rcu_preempt3-21ksoftirqd/009:53:050
81480,0rcu_preempt3-21ksoftirqd/008:13:100
81480,0rcu_preempt19802-21kworker/0:109:58:180
81480,0rcu_preempt19-21ksoftirqd/107:34:141
81480,0rcu_preempt19-21ksoftirqd/107:34:141
10050480,0irq/346-48484008776-1kworker/1:1H11:23:521
10050480,0irq/346-4848400851-21rngd09:11:141
10050480,0irq/346-484840054-21kswapd012:13:440
10050480,0irq/346-484840054-21kswapd011:23:420
10050480,0irq/346-48484000-21swapper/012:33:210
10050480,0irq/346-48484000-21swapper/012:05:320
10050480,0irq/346-48484000-21swapper/010:23:110
81470,0rcu_preempt3-21ksoftirqd/008:58:020
81470,0rcu_preempt3-21ksoftirqd/008:43:020
81470,0rcu_preempt3-21ksoftirqd/008:34:060
81470,0rcu_preempt26611-1kworker/1:1H12:08:091
81470,0rcu_preempt19-21ksoftirqd/107:22:501
81460,0rcu_preempt3-21ksoftirqd/008:02:460
81460,0rcu_preempt3-21ksoftirqd/007:48:580
81460,0rcu_preempt3-21ksoftirqd/007:44:430
81460,0rcu_preempt19-21ksoftirqd/108:17:581
81460,0rcu_preempt19-21ksoftirqd/108:08:061
81460,0rcu_preempt19-21ksoftirqd/108:03:001
81460,0rcu_preempt19-21ksoftirqd/107:19:091
10050460,0irq/346-484840023600-1kworker/1:3H11:00:441
10050460,0irq/346-484840023600-1kworker/1:3H11:00:441
81450,0rcu_preempt6001-21php-cgi08:53:030
81450,0rcu_preempt3-21ksoftirqd/009:03:090
81450,0rcu_preempt3-21ksoftirqd/008:48:110
81450,0rcu_preempt3-21ksoftirqd/008:38:030
81450,0rcu_preempt19-21ksoftirqd/109:38:011
81450,0rcu_preempt19-21ksoftirqd/107:29:481
81450,0rcu_preempt0-21swapper/107:52:561
81440,0rcu_preempt19-21ksoftirqd/112:33:531
81440,0rcu_preempt19-21ksoftirqd/108:23:081
81440,0rcu_preempt19-21ksoftirqd/107:43:061
81440,0rcu_preempt19-21ksoftirqd/107:41:571
81440,0rcu_preempt19-21ksoftirqd/107:41:571
81440,0rcu_preempt12098-21kworker/1:109:49:331
81430,0rcu_preempt3-21ksoftirqd/007:08:040
81430,0rcu_preempt19-21ksoftirqd/108:53:031
81430,0rcu_preempt19-21ksoftirqd/108:48:131
81420,0rcu_preempt19-21ksoftirqd/108:43:121
81420,0rcu_preempt19-21ksoftirqd/108:33:041
81410,0rcu_preempt19-21ksoftirqd/109:03:031
81410,0rcu_preempt19-21ksoftirqd/108:58:021
81410,0rcu_preempt19-21ksoftirqd/108:28:041
81400,0rcu_preempt6816-21ping07:38:030
81400,0rcu_preempt6816-21ping07:38:030
81400,0rcu_preempt19-21ksoftirqd/107:04:431
10050400,0irq/346-48484000-21swapper/107:48:031
81390,0rcu_preempt3-21ksoftirqd/007:18:130
81390,0rcu_preempt19-21ksoftirqd/107:12:401
353499392,0cyclictest0-21swapper/007:32:460
81380,0rcu_preempt19-21ksoftirqd/108:38:051
353499372,0cyclictest0-21swapper/007:33:260
353499372,0cyclictest0-21swapper/007:33:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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