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2026-03-23 - 15:04

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 792 highest latencies:
System rackaslot5s.osadl.org (updated Mon Mar 23, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811330,0rcu_preempt3-21ksoftirqd/010:39:080
81920,0rcu_preempt25970-21kworker/0:211:39:010
81910,0rcu_preempt3-21ksoftirqd/012:36:220
81910,0rcu_preempt3-21ksoftirqd/012:36:220
81900,0rcu_preempt26869-21kworker/u4:010:11:040
81880,0rcu_preempt3-21ksoftirqd/011:10:200
81870,0rcu_preempt3-21ksoftirqd/008:09:210
81850,0rcu_preempt3-21ksoftirqd/009:34:180
81850,0rcu_preempt27778-21kworker/0:112:02:010
81840,0rcu_preempt3-21ksoftirqd/011:54:180
81840,0rcu_preempt3-21ksoftirqd/011:37:210
81830,0rcu_preempt3-21ksoftirqd/009:50:110
81810,0rcu_preempt3-21ksoftirqd/011:44:030
81810,0rcu_preempt3-21ksoftirqd/010:38:350
81810,0rcu_preempt3-21ksoftirqd/010:32:470
81800,0rcu_preempt909-21kworker/0:109:32:050
81800,0rcu_preempt3-21ksoftirqd/007:56:490
81800,0rcu_preempt16903-21kworker/0:212:33:130
81800,0rcu_preempt13624-21kworker/0:010:47:100
81790,0rcu_preempt3-21ksoftirqd/012:24:190
81790,0rcu_preempt3-21ksoftirqd/011:24:250
81790,0rcu_preempt3-21ksoftirqd/010:20:440
81790,0rcu_preempt3-21ksoftirqd/009:39:190
81790,0rcu_preempt3-21ksoftirqd/009:39:190
81790,0rcu_preempt3-21ksoftirqd/008:24:020
81780,0rcu_preempt3-21ksoftirqd/010:24:060
81780,0rcu_preempt26909-21kworker/0:011:23:140
81770,0rcu_preempt3-21ksoftirqd/012:04:030
81760,0rcu_preempt3-21ksoftirqd/011:16:470
81730,0rcu_preempt3-21ksoftirqd/012:19:050
81730,0rcu_preempt3-21ksoftirqd/009:13:270
81730,0rcu_preempt3-21ksoftirqd/009:13:270
81710,0rcu_preempt3-21ksoftirqd/008:16:440
81700,0rcu_preempt3-21ksoftirqd/009:23:170
10050700,0irq/346-484840010572-1kworker/0:3H10:14:220
81690,0rcu_preempt3-21ksoftirqd/009:57:210
10050680,0irq/346-484840010388-1kworker/0:2H11:52:270
81670,0rcu_preempt3-21ksoftirqd/007:43:520
81660,0rcu_preempt54-21kswapd009:43:580
81660,0rcu_preempt3-21ksoftirqd/011:08:140
81640,0rcu_preempt3812-21ssh10:04:130
81640,0rcu_preempt3-21ksoftirqd/011:33:320
81640,0rcu_preempt3-21ksoftirqd/007:24:170
81640,0rcu_preempt3-21ksoftirqd/007:24:170
10050640,0irq/346-4848400181ktimersoftd/109:13:481
10050640,0irq/346-4848400181ktimersoftd/109:13:481
10050620,0irq/346-4848400181ktimersoftd/109:31:531
10050610,0irq/346-4848400181ktimersoftd/111:42:001
9950590,0irq/345-4848400181ktimersoftd/110:29:531
81590,0rcu_preempt54-21kswapd012:26:301
4350590,0irq/32-433000006310-21ssh08:44:070
10050590,0irq/346-4848400181ktimersoftd/112:11:111
10050590,0irq/346-4848400181ktimersoftd/109:42:201
10050590,0irq/346-4848400181ktimersoftd/109:42:201
10050590,0irq/346-4848400171rcuc/112:02:281
9950580,0irq/345-4848400181ktimersoftd/111:18:441
10050580,0irq/346-4848400181ktimersoftd/111:48:031
9950570,0irq/345-4848400181ktimersoftd/112:05:141
9950570,0irq/345-4848400171rcuc/111:25:171
10050570,0irq/346-4848400181ktimersoftd/112:32:111
9950560,0irq/345-4848400718199cyclictest10:46:001
9950560,0irq/345-484840019691-21ssh10:54:090
9950560,0irq/345-4848400181ktimersoftd/111:49:391
9950560,0irq/345-4848400181ktimersoftd/110:58:301
9950560,0irq/345-4848400181ktimersoftd/110:42:421
9950560,0irq/345-4848400171rcuc/111:19:301
9950560,0irq/345-4848400171rcuc/109:57:181
10050560,0irq/346-4848400181ktimersoftd/109:44:141
9950550,0irq/345-4848400171rcuc/111:33:141
9950550,0irq/345-4848400171rcuc/109:53:251
9950550,0irq/345-4848400171rcuc/109:38:101
81550,0rcu_preempt0-21swapper/010:00:380
10050550,0irq/346-4848400181ktimersoftd/110:38:341
10050550,0irq/346-484840016194-21ssh10:16:551
9950540,0irq/345-4848400718199cyclictest11:34:401
9950540,0irq/345-4848400181ktimersoftd/110:58:541
9950540,0irq/345-4848400181ktimersoftd/110:03:301
9950540,0irq/345-4848400171rcuc/110:49:461
10050540,0irq/346-4848400171rcuc/112:38:301
10050540,0irq/346-4848400171rcuc/112:38:301
10050540,0irq/346-484840016764-1kworker/0:2H09:14:180
10050530,0irq/346-4848400171rcuc/107:44:181
10050530,0irq/346-48484000-21swapper/009:26:400
9950520,0irq/345-4848400171rcuc/108:59:101
9950520,0irq/345-48484000-21swapper/012:10:420
10050520,0irq/346-484840020030-1kworker/0:0H12:15:220
9950510,0irq/345-4848400171rcuc/109:20:461
10050510,0irq/346-484840027737-21ssh11:02:330
10050510,0irq/346-484840023743-21munin-node0
10050510,0irq/346-484840011819-21munin-node0
10050500,0irq/346-484840014521-21ssh10:49:020
9950490,0irq/345-48484000-21swapper/007:44:290
10050490,0irq/346-484840014607-21munin-node0
10050490,0irq/346-484840014607-21munin-node0
9950480,0irq/345-4848400171rcuc/110:05:531
81480,0rcu_preempt3-21ksoftirqd/008:28:530
81480,0rcu_preempt3-21ksoftirqd/007:04:080
10050480,0irq/346-4848400851-21rngd10:11:261
10050480,0irq/346-48484004503-21wget08:39:030
10050480,0irq/346-484840015262-21ssh11:56:121
81470,0rcu_preempt19-21ksoftirqd/107:34:201
81470,0rcu_preempt1470-21runrttasks12:20:501
10050470,0irq/346-484840030320-21aten_rapower_cu08:19:030
10050470,0irq/346-484840025856-21iwlist08:04:150
9950460,0irq/345-484840010463-21ping07:34:190
81460,0rcu_preempt3-21ksoftirqd/008:34:130
81450,0rcu_preempt8043-21ps07:09:150
81450,0rcu_preempt3-21ksoftirqd/009:04:160
81450,0rcu_preempt19-21ksoftirqd/108:29:211
81440,0rcu_preempt19326-21ssh09:13:571
81440,0rcu_preempt19-21ksoftirqd/108:28:351
81440,0rcu_preempt19-21ksoftirqd/107:27:551
81440,0rcu_preempt19-21ksoftirqd/107:27:551
9950430,0irq/345-484840019-21ksoftirqd/108:14:101
81430,0rcu_preempt3-21ksoftirqd/008:49:060
81430,0rcu_preempt3-21ksoftirqd/007:14:190
81430,0rcu_preempt19-21ksoftirqd/108:20:401
81430,0rcu_preempt19-21ksoftirqd/108:00:581
81430,0rcu_preempt19-21ksoftirqd/107:29:271
81430,0rcu_preempt19-21ksoftirqd/107:29:271
81430,0rcu_preempt10627-21apt-get07:19:021
10050430,0irq/346-484840011210-21munin-node0
10050430,0irq/346-48484000-21swapper/110:22:561
81420,0rcu_preempt19-21ksoftirqd/112:14:041
81420,0rcu_preempt10463-21ping07:49:100
10050420,0irq/346-4848400171rcuc/111:12:581
9950410,0irq/345-4848400718199cyclictest09:27:391
81410,0rcu_preempt3-21ksoftirqd/008:54:110
81410,0rcu_preempt19-21ksoftirqd/108:09:141
81400,0rcu_preempt19-21ksoftirqd/108:56:321
81400,0rcu_preempt19-21ksoftirqd/107:43:351
81390,0rcu_preempt19-21ksoftirqd/108:05:231
81390,0rcu_preempt19-21ksoftirqd/107:50:101
10050390,0irq/346-484840025222-21ssh10:26:021
81380,0rcu_preempt19-21ksoftirqd/111:07:121
81380,0rcu_preempt19-21ksoftirqd/107:54:241
81380,0rcu_preempt19-21ksoftirqd/107:17:351
81370,0rcu_preempt19-21ksoftirqd/109:04:081
81370,0rcu_preempt19-21ksoftirqd/108:53:121
81370,0rcu_preempt19-21ksoftirqd/108:48:011
81370,0rcu_preempt19-21ksoftirqd/108:43:271
81370,0rcu_preempt19-21ksoftirqd/107:12:241
81370,0rcu_preempt19-21ksoftirqd/107:04:071
81360,0rcu_preempt19-21ksoftirqd/108:35:541
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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