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2026-04-05 - 22:01

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 Apr 05, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811180,0rcu_preempt19202-21diskmemload09:38:061
811130,0rcu_preempt28245-1kworker/1:0H08:04:021
811120,0rcu_preempt54-21kswapd012:26:581
811120,0rcu_preempt0-21swapper/112:34:231
811100,0rcu_preempt19-21ksoftirqd/110:27:231
811100,0rcu_preempt19-21ksoftirqd/110:27:231
811090,0rcu_preempt19-21ksoftirqd/109:49:041
811080,0rcu_preempt19-21ksoftirqd/112:19:091
811070,0rcu_preempt19-21ksoftirqd/110:54:041
811070,0rcu_preempt19-21ksoftirqd/109:22:351
811050,0rcu_preempt20502-21ssh10:48:171
811050,0rcu_preempt19-21ksoftirqd/109:28:171
811040,0rcu_preempt19-21ksoftirqd/109:38:571
811030,0rcu_preempt19-21ksoftirqd/111:40:321
811010,0rcu_preempt19-21ksoftirqd/110:21:591
811010,0rcu_preempt19-21ksoftirqd/110:11:401
811000,0rcu_preempt14429-21ssh10:41:461
81990,0rcu_preempt19-21ksoftirqd/109:48:091
81980,0rcu_preempt19-21ksoftirqd/111:52:371
81980,0rcu_preempt19-21ksoftirqd/111:02:411
81980,0rcu_preempt19-21ksoftirqd/107:34:071
81970,0rcu_preempt19-21ksoftirqd/111:10:091
81970,0rcu_preempt19-21ksoftirqd/108:43:561
10050970,0irq/346-484840054-21kswapd011:59:480
81960,0rcu_preempt19-21ksoftirqd/112:17:341
81960,0rcu_preempt19-21ksoftirqd/111:26:071
81960,0rcu_preempt19-21ksoftirqd/110:49:141
81950,0rcu_preempt19-21ksoftirqd/112:30:291
81940,0rcu_preempt19-21ksoftirqd/110:34:121
81940,0rcu_preempt19-21ksoftirqd/110:34:121
81940,0rcu_preempt19-21ksoftirqd/109:54:521
81940,0rcu_preempt19-21ksoftirqd/109:10:491
81910,0rcu_preempt19-21ksoftirqd/111:34:041
81910,0rcu_preempt0-21swapper/110:16:501
81900,0rcu_preempt19-21ksoftirqd/111:03:481
81900,0rcu_preempt19-21ksoftirqd/108:58:231
81880,0rcu_preempt19-21ksoftirqd/112:12:021
81880,0rcu_preempt19-21ksoftirqd/107:52:121
81860,0rcu_preempt19-21ksoftirqd/107:12:001
81850,0rcu_preempt19-21ksoftirqd/110:04:171
81850,0rcu_preempt19-21ksoftirqd/107:08:401
81840,0rcu_preempt19-21ksoftirqd/110:00:511
81840,0rcu_preempt19-21ksoftirqd/108:14:421
81840,0rcu_preempt19-21ksoftirqd/108:13:401
81830,0rcu_preempt19-21ksoftirqd/109:14:201
81830,0rcu_preempt19-21ksoftirqd/107:38:561
81830,0rcu_preempt19-21ksoftirqd/107:38:561
81810,0rcu_preempt19-21ksoftirqd/111:33:331
81810,0rcu_preempt19-21ksoftirqd/108:02:171
81810,0rcu_preempt19-21ksoftirqd/107:43:411
81800,0rcu_preempt19-21ksoftirqd/108:33:531
81800,0rcu_preempt19-21ksoftirqd/108:24:471
81800,0rcu_preempt19-21ksoftirqd/108:24:471
81800,0rcu_preempt19-21ksoftirqd/107:28:491
81780,0rcu_preempt19-21ksoftirqd/107:22:271
81760,0rcu_preempt19-21ksoftirqd/112:02:531
81760,0rcu_preempt19-21ksoftirqd/111:22:231
81760,0rcu_preempt19-21ksoftirqd/111:15:401
81760,0rcu_preempt19-21ksoftirqd/110:32:441
81760,0rcu_preempt19-21ksoftirqd/108:29:041
81750,0rcu_preempt19-21ksoftirqd/112:03:541
81750,0rcu_preempt19-21ksoftirqd/111:53:581
81750,0rcu_preempt19-21ksoftirqd/107:24:101
81740,0rcu_preempt19-21ksoftirqd/111:47:241
81740,0rcu_preempt19-21ksoftirqd/109:30:571
81730,0rcu_preempt54-21kswapd009:19:040
81730,0rcu_preempt19-21ksoftirqd/108:49:051
81730,0rcu_preempt19-21ksoftirqd/108:19:391
81730,0rcu_preempt19-21ksoftirqd/107:56:521
10050720,0irq/346-484840018329-1kworker/0:0H10:50:000
81710,0rcu_preempt19-21ksoftirqd/109:03:401
81690,0rcu_preempt5317-21kworker/1:309:03:541
81690,0rcu_preempt3-21ksoftirqd/009:08:410
10050690,0irq/346-484840018329-1kworker/0:0H10:46:520
81680,0rcu_preempt3-21ksoftirqd/012:34:410
10050680,0irq/346-484840028683-1kworker/0:1H09:53:310
81670,0rcu_preempt19-21ksoftirqd/107:14:011
81670,0rcu_preempt19-21ksoftirqd/107:14:011
81660,0rcu_preempt3-21ksoftirqd/010:54:430
81650,0rcu_preempt10701-21apt-get07:03:500
9950640,0irq/345-48484000-21swapper/011:27:330
81640,0rcu_preempt3-21ksoftirqd/009:39:070
81620,0rcu_preempt19-21ksoftirqd/108:38:551
81580,0rcu_preempt3-21ksoftirqd/008:29:070
81550,0rcu_preempt3-21ksoftirqd/012:19:050
10050510,0irq/346-4848400851-21rngd10:06:530
10050500,0irq/346-4848400851-21rngd11:49:460
10050500,0irq/346-484840054-21kswapd011:04:090
10050500,0irq/346-48484001470-21runrttasks07:28:570
10050490,0irq/346-484840028683-1kworker/0:1H09:54:590
10050490,0irq/346-484840028241-1kworker/0:0H10:59:210
111480,0rcuc/02910-1kworker/0:0H11:38:520
10050470,0irq/346-48484009715-21ssh12:15:080
10050470,0irq/346-484840013811-1kworker/0:1H09:35:180
10050470,0irq/346-484840013713-21seq11:46:480
10050470,0irq/346-48484000-21swapper/010:19:060
10050460,0irq/346-48484003472-1kworker/0:1H10:35:260
10050460,0irq/346-48484003472-1kworker/0:1H10:35:260
10050450,0irq/346-484840054-21kswapd007:10:510
10050450,0irq/346-484840025465-1kworker/0:1H11:35:260
10050450,0irq/346-48484001639-21http_loadtime10:28:580
9950440,0irq/345-48484000-21swapper/011:09:080
9950440,0irq/345-48484000-21swapper/010:09:160
10050440,0irq/346-48484000-21swapper/012:29:000
10050440,0irq/346-48484000-21swapper/010:24:050
10050440,0irq/346-48484000-21swapper/010:24:050
10050440,0irq/346-48484000-21swapper/009:14:040
81430,0rcu_preempt3-21ksoftirqd/009:28:490
10050430,0irq/346-484840022266-21ssh10:16:580
10050430,0irq/346-48484001936-21grep09:23:520
10050430,0irq/346-48484000-21swapper/010:43:020
9950420,0irq/345-484840027978-21cut11:28:400
81420,0rcu_preempt0-21swapper/012:03:590
10050420,0irq/346-484840022373-21ssh11:55:120
10050420,0irq/346-484840015722-21sshd08:56:470
9950410,0irq/345-48484005921-21taskset09:59:550
190112410,0chrt15083-1kworker/0:2H12:24:190
13250410,0irq/301-48020000-21swapper/007:48:560
12210994116,0cyclictest0-21swapper/008:06:460
10050410,0irq/346-48484004412-21ssh12:09:410
10050410,0irq/346-484840022326-21meminfo09:44:030
10050410,0irq/346-484840019738-21ssh11:19:230
10050410,0irq/346-484840015619-1kworker/0:3H11:18:390
1221099404,0cyclictest15492-21ping07:43:510
10050400,0irq/346-4848400797-21sshd08:10:420
10050400,0irq/346-484840013569-1kworker/0:3H07:14:020
10050400,0irq/346-484840013569-1kworker/0:3H07:14:020
4350390,0irq/32-4330000012550-21dropbear08:47:540
12210993914,0cyclictest0-21swapper/007:24:020
10050390,0irq/346-48484000-21swapper/009:04:050
10050390,0irq/346-48484000-21swapper/008:48:540
1221099382,0cyclictest0-21swapper/008:28:180
1221099382,0cyclictest0-21swapper/008:28:180
10050380,0irq/346-48484007437-1kworker/0:0H08:33:570
10050380,0irq/346-484840029226-21if_eth207:58:590
12210993713,0cyclictest0-21swapper/007:33:540
12210993712,0cyclictest3107-21df08:18:530
12210993712,0cyclictest0-21swapper/007:42:580
12210993712,0cyclictest0-21swapper/007:42:580
10050370,0irq/346-48484008980-1kworker/0:2H08:38:550
9950360,0irq/345-48484000-21swapper/007:53:570
1221099366,0cyclictest29844-21ping08:13:510
10050360,0irq/346-484840012391-1kworker/0:0H07:20:530
10050340,0irq/346-484840017193-21sshd08:59:480
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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