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2026-03-25 - 17:11

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 Mar 25, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10050870,0irq/346-484840054-21kswapd011:43:510
10050730,0irq/346-48484000-21swapper/011:51:140
10050720,0irq/346-48484000-21swapper/011:39:550
10050720,0irq/346-48484000-21swapper/009:38:280
10050710,0irq/346-48484000-21swapper/010:50:290
81700,0rcu_preempt28630-21ssh12:11:140
81690,0rcu_preempt3-21ksoftirqd/010:18:420
81690,0rcu_preempt3-21ksoftirqd/009:13:550
81680,0rcu_preempt3-21ksoftirqd/009:31:520
10050680,0irq/346-48484000-21swapper/011:00:500
81670,0rcu_preempt3-21ksoftirqd/011:34:160
81670,0rcu_preempt3-21ksoftirqd/011:16:580
10050660,0irq/346-48484000-21swapper/012:22:490
81640,0rcu_preempt3-21ksoftirqd/009:57:330
81630,0rcu_preempt0-21swapper/110:50:381
81620,0rcu_preempt19-21ksoftirqd/110:30:201
81620,0rcu_preempt19-21ksoftirqd/110:03:231
81620,0rcu_preempt0-21swapper/009:25:360
81610,0rcu_preempt3-21ksoftirqd/011:19:450
81610,0rcu_preempt19-21ksoftirqd/111:20:211
81610,0rcu_preempt19-21ksoftirqd/107:49:121
81610,0rcu_preempt0-21swapper/110:07:221
10050610,0irq/346-484840023529-1kworker/1:1H12:08:271
81600,0rcu_preempt3-21ksoftirqd/010:19:120
81600,0rcu_preempt19-21ksoftirqd/112:35:101
81600,0rcu_preempt19-21ksoftirqd/112:28:221
81600,0rcu_preempt19-21ksoftirqd/112:01:271
81600,0rcu_preempt19-21ksoftirqd/109:38:431
10050600,0irq/346-4848400831-1kworker/1:0H10:37:121
10050600,0irq/346-484840054-21kswapd012:16:341
10050600,0irq/346-484840030575-1kworker/1:2H09:25:521
10050600,0irq/346-484840021919-1kworker/1:2H11:46:331
10050600,0irq/346-484840015485-1kworker/1:0H11:00:021
81590,0rcu_preempt19-21ksoftirqd/112:20:111
81590,0rcu_preempt19-21ksoftirqd/111:14:271
81590,0rcu_preempt19-21ksoftirqd/110:19:581
10050590,0irq/346-48484002475-1kworker/1:3H11:12:391
10050590,0irq/346-484840010588-1kworker/1:3H10:47:551
9950580,0irq/345-4848400181ktimersoftd/110:42:111
10050580,0irq/346-484840022199-1kworker/1:3H09:54:271
81570,0rcu_preempt3-21ksoftirqd/008:24:020
81570,0rcu_preempt3-21ksoftirqd/008:24:020
81570,0rcu_preempt24589-21kworker/0:208:08:110
81570,0rcu_preempt19-21ksoftirqd/108:59:071
10050570,0irq/346-484840054-21kswapd009:43:141
10050570,0irq/346-484840012643-1kworker/1:1H12:29:051
81560,0rcu_preempt54-21kswapd009:23:161
81560,0rcu_preempt3-21ksoftirqd/012:18:160
81560,0rcu_preempt22719-21ping08:13:510
10050560,0irq/346-48484009037-1kworker/1:2H10:11:331
10050560,0irq/346-48484009037-1kworker/1:2H10:11:331
10050560,0irq/346-484840030900-21ssh11:39:471
10050560,0irq/346-4848400230432chrt10:24:510
81550,0rcu_preempt3-21ksoftirqd/009:09:120
10050550,0irq/346-484840054-21kswapd011:36:371
10050550,0irq/346-484840054-21kswapd010:58:221
81540,0rcu_preempt26940-1kworker/0:0H09:59:250
81540,0rcu_preempt24589-21kworker/0:208:13:290
81540,0rcu_preempt19-21ksoftirqd/107:36:071
81540,0rcu_preempt19-21ksoftirqd/107:14:081
10050540,0irq/346-484840023530-1kworker/0:2H12:07:160
10050540,0irq/346-484840020812-1kworker/1:2H09:16:381
10050540,0irq/346-484840018794-1kworker/1:2H10:24:161
10050540,0irq/346-484840017353-1kworker/1:2H09:47:131
10050540,0irq/346-484840013902-1kworker/1:0H10:17:291
10050540,0irq/346-484840010500-1kworker/0:2H12:26:460
81530,0rcu_preempt13556-21diskmemload12:11:381
10050530,0irq/346-48484007995-1kworker/0:0H09:39:490
10050530,0irq/346-484840010161-21ssh10:45:030
81520,0rcu_preempt3-21ksoftirqd/011:56:400
81520,0rcu_preempt3-21ksoftirqd/010:12:050
81520,0rcu_preempt3-21ksoftirqd/010:12:050
81520,0rcu_preempt3-21ksoftirqd/010:04:450
81520,0rcu_preempt19-21ksoftirqd/107:39:271
81510,0rcu_preempt3-21ksoftirqd/011:29:110
81510,0rcu_preempt3-21ksoftirqd/009:49:180
81510,0rcu_preempt3-21ksoftirqd/007:11:580
81510,0rcu_preempt28390-21irqstats11:04:090
81510,0rcu_preempt19-21ksoftirqd/108:19:091
81510,0rcu_preempt19-21ksoftirqd/107:20:411
10050510,0irq/346-484840020288-1kworker/1:1H11:05:141
10050510,0irq/346-484840017114-1kworker/1:1H11:30:431
10050510,0irq/346-484840012268-1kworker/1:3H11:24:151
81500,0rcu_preempt3-21ksoftirqd/012:29:130
81500,0rcu_preempt3-21ksoftirqd/008:01:580
81500,0rcu_preempt19-21ksoftirqd/107:58:071
10050500,0irq/346-48484008876-21ssh11:50:451
10050500,0irq/346-484840054-21kswapd009:30:511
10050500,0irq/346-484840022199-1kworker/1:3H09:51:241
10050500,0irq/346-484840013769-1kworker/1:2H11:56:591
81490,0rcu_preempt32548-21kworker/0:108:29:140
81490,0rcu_preempt3-21ksoftirqd/009:23:350
81490,0rcu_preempt3-21ksoftirqd/008:23:470
81490,0rcu_preempt19-21ksoftirqd/108:08:511
81490,0rcu_preempt12941-21kworker/0:111:27:290
81480,0rcu_preempt3-21ksoftirqd/010:42:150
81480,0rcu_preempt3-21ksoftirqd/007:57:480
81480,0rcu_preempt19-21ksoftirqd/107:24:111
10050480,0irq/346-484840054-21kswapd011:12:330
10050480,0irq/346-484840015891-1kworker/1:1H09:10:421
81470,0rcu_preempt3-21ksoftirqd/011:59:540
81470,0rcu_preempt3-21ksoftirqd/010:29:250
81470,0rcu_preempt19-21ksoftirqd/108:09:171
10050470,0irq/346-484840054-21kswapd010:35:050
10050470,0irq/346-484840017770-21apt-get12:34:000
81460,0rcu_preempt5494-21apt-get08:44:010
81460,0rcu_preempt32548-21kworker/0:108:49:090
81460,0rcu_preempt3-21ksoftirqd/008:35:110
81460,0rcu_preempt19-21ksoftirqd/107:59:101
81460,0rcu_preempt19-21ksoftirqd/107:44:171
81450,0rcu_preempt3-21ksoftirqd/009:43:500
81450,0rcu_preempt19-21ksoftirqd/108:17:191
81450,0rcu_preempt18810-21taskset10:54:110
81450,0rcu_preempt12072-21apt-get09:04:010
81440,0rcu_preempt19-21ksoftirqd/109:04:061
81440,0rcu_preempt19-21ksoftirqd/108:24:151
81440,0rcu_preempt19-21ksoftirqd/108:24:151
10050440,0irq/346-484840012780-1kworker/1:2H07:31:061
10050440,0irq/346-484840011917-21http_loadtime07:24:100
81430,0rcu_preempt3-21ksoftirqd/009:00:080
81430,0rcu_preempt19-21ksoftirqd/108:29:091
81420,0rcu_preempt8359-21apt-get07:14:020
81420,0rcu_preempt3-21ksoftirqd/008:39:020
81420,0rcu_preempt3-21ksoftirqd/007:50:370
81420,0rcu_preempt3-21ksoftirqd/007:05:210
81420,0rcu_preempt19-21ksoftirqd/108:49:181
81420,0rcu_preempt19-21ksoftirqd/107:09:051
81410,0rcu_preempt8769-21munin-node1
81410,0rcu_preempt3-21ksoftirqd/007:48:390
81410,0rcu_preempt23188-21kworker/0:107:36:560
81410,0rcu_preempt19-21ksoftirqd/108:43:531
81410,0rcu_preempt19-21ksoftirqd/108:39:091
10050410,0irq/346-48484000-21swapper/107:04:111
81400,0rcu_preempt3-21ksoftirqd/008:55:410
81380,0rcu_preempt3-21ksoftirqd/007:19:110
81380,0rcu_preempt23188-21kworker/0:107:29:010
81380,0rcu_preempt19-21ksoftirqd/108:34:121
6576993710,0cyclictest18007-21taskset07:43:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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