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2026-09-14 - 01:47

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 Sep 13, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
100501050,0irq/346-484840030078-1kworker/0:3H09:48:390
81880,0rcu_preempt19-21ksoftirqd/111:39:471
81690,0rcu_preempt10130-21ssh10:54:051
81660,0rcu_preempt29859-21ssh11:13:401
81660,0rcu_preempt19-21ksoftirqd/112:20:331
81650,0rcu_preempt19-21ksoftirqd/109:50:031
10050650,0irq/346-484840054-21kswapd010:41:320
81640,0rcu_preempt19-21ksoftirqd/107:39:191
81630,0rcu_preempt19-21ksoftirqd/110:57:301
81620,0rcu_preempt19-21ksoftirqd/112:14:161
81620,0rcu_preempt19-21ksoftirqd/110:45:241
81610,0rcu_preempt19-21ksoftirqd/111:53:071
81610,0rcu_preempt19-21ksoftirqd/111:21:241
81610,0rcu_preempt19-21ksoftirqd/111:18:331
81610,0rcu_preempt19-21ksoftirqd/109:13:121
9950590,0irq/345-4848400181ktimersoftd/111:29:171
81590,0rcu_preempt19-21ksoftirqd/112:39:001
81590,0rcu_preempt19-21ksoftirqd/112:39:001
81590,0rcu_preempt19-21ksoftirqd/109:24:021
81590,0rcu_preempt19-21ksoftirqd/109:16:531
10050580,0irq/346-484840012876-1kworker/0:1H12:01:320
10050580,0irq/346-484840010608-1kworker/0:1H12:33:450
10050580,0irq/346-484840010608-1kworker/0:1H12:33:450
10050580,0irq/346-484840010183-1kworker/0:0H11:33:290
81570,0rcu_preempt3-21ksoftirqd/011:34:280
10050570,0irq/346-484840015219-1kworker/0:1H09:55:140
9950560,0irq/345-484840027043-1kworker/0:1H10:07:260
9950560,0irq/345-484840027043-1kworker/0:1H10:07:260
9950560,0irq/345-484840012876-1kworker/0:1H12:10:020
81560,0rcu_preempt9950irq/345-484840009:19:410
325402560,0chrt10050irq/346-484840007:23:390
10050560,0irq/346-484840032065-1kworker/0:2H10:12:020
85302550,0chrt7475-1kworker/0:2H10:51:590
81550,0rcu_preempt3-21ksoftirqd/011:54:370
81550,0rcu_preempt3-21ksoftirqd/011:49:320
81550,0rcu_preempt3-21ksoftirqd/007:09:350
81550,0rcu_preempt19-21ksoftirqd/110:20:501
81550,0rcu_preempt19-21ksoftirqd/108:04:291
81550,0rcu_preempt0-21swapper/110:24:391
10050550,0irq/346-484840030078-1kworker/0:3H09:38:350
10050550,0irq/346-48484001974-1kworker/0:0H09:27:410
10050550,0irq/346-484840010183-1kworker/0:0H11:29:140
9950540,0irq/345-484840012484-1kworker/0:0H11:00:050
81540,0rcu_preempt3-21ksoftirqd/012:24:280
9950530,0irq/345-48484007850-1kworker/1:1H12:06:221
81530,0rcu_preempt8922-21grep10:19:450
81530,0rcu_preempt19-21ksoftirqd/108:14:471
81530,0rcu_preempt0-21swapper/110:18:101
81520,0rcu_preempt3-21ksoftirqd/007:54:370
81520,0rcu_preempt19-21ksoftirqd/109:30:171
81520,0rcu_preempt19-21ksoftirqd/108:19:371
81520,0rcu_preempt19-21ksoftirqd/108:11:461
10050520,0irq/346-484840054-21kswapd010:16:120
9950510,0irq/345-48484001974-1kworker/0:0H09:16:300
81510,0rcu_preempt3-21ksoftirqd/012:34:360
81510,0rcu_preempt3-21ksoftirqd/012:34:360
81510,0rcu_preempt19-21ksoftirqd/109:59:341
81510,0rcu_preempt19-21ksoftirqd/107:20:471
81510,0rcu_preempt19-21ksoftirqd/107:04:351
81510,0rcu_preempt0-21swapper/111:44:401
81500,0rcu_preempt3-21ksoftirqd/011:14:200
81500,0rcu_preempt3-21ksoftirqd/010:34:340
81500,0rcu_preempt19-21ksoftirqd/109:04:411
81500,0rcu_preempt19-21ksoftirqd/107:44:481
81500,0rcu_preempt19-21ksoftirqd/107:44:481
10050500,0irq/346-48484006449-1kworker/0:3H07:44:400
10050500,0irq/346-48484006449-1kworker/0:3H07:44:400
10050500,0irq/346-484840010272-21ssh09:49:330
9950490,0irq/345-48484000-21swapper/011:44:390
81490,0rcu_preempt9377-21kworker/0:008:06:010
81490,0rcu_preempt54-21kswapd007:39:220
81490,0rcu_preempt3-21ksoftirqd/012:18:540
81490,0rcu_preempt3-21ksoftirqd/012:04:490
81490,0rcu_preempt3-21ksoftirqd/010:54:270
81490,0rcu_preempt3-21ksoftirqd/010:32:140
81490,0rcu_preempt3-21ksoftirqd/010:28:010
81490,0rcu_preempt3-21ksoftirqd/009:59:360
81490,0rcu_preempt3-21ksoftirqd/009:39:430
81490,0rcu_preempt3-21ksoftirqd/009:32:180
81490,0rcu_preempt3-21ksoftirqd/008:59:370
81490,0rcu_preempt3-21ksoftirqd/008:24:420
81490,0rcu_preempt3-21ksoftirqd/008:19:180
81490,0rcu_preempt3-21ksoftirqd/008:12:290
81490,0rcu_preempt3-21ksoftirqd/007:04:410
81490,0rcu_preempt20575-21apt-get11:04:280
81490,0rcu_preempt19-21ksoftirqd/110:43:291
81490,0rcu_preempt19-21ksoftirqd/110:10:241
81490,0rcu_preempt19-21ksoftirqd/109:41:041
81490,0rcu_preempt19-21ksoftirqd/109:24:341
81480,0rcu_preempt54-21kswapd008:23:180
81480,0rcu_preempt3-21ksoftirqd/011:22:010
81480,0rcu_preempt3-21ksoftirqd/009:04:340
81480,0rcu_preempt3-21ksoftirqd/008:50:290
81480,0rcu_preempt2537-21apt-get09:09:290
81480,0rcu_preempt24969-21apt-get08:39:290
10050480,0irq/346-48484003541-21rm10:47:000
81470,0rcu_preempt8543-21apt-get07:49:290
81470,0rcu_preempt54-21kswapd009:47:141
81470,0rcu_preempt3-21ksoftirqd/008:54:410
81470,0rcu_preempt3-21ksoftirqd/008:34:350
81470,0rcu_preempt19-21ksoftirqd/111:06:151
81470,0rcu_preempt19-21ksoftirqd/108:29:331
81470,0rcu_preempt19-21ksoftirqd/108:24:361
81470,0rcu_preempt19-21ksoftirqd/108:02:391
81470,0rcu_preempt19-21ksoftirqd/107:54:321
10050470,0irq/346-484840029693-21munin-node0
10050470,0irq/346-484840012427-21munin-node0
81460,0rcu_preempt2067-21kworker/1:111:30:041
81460,0rcu_preempt19-21ksoftirqd/111:59:381
81460,0rcu_preempt19-21ksoftirqd/109:54:301
81460,0rcu_preempt19-21ksoftirqd/108:57:031
10050460,0irq/346-484840031094-21ssh12:19:310
10050460,0irq/346-484840026142-21ssh11:09:400
81450,0rcu_preempt26811-21diskstats08:44:320
81450,0rcu_preempt19-21ksoftirqd/111:34:281
10050450,0irq/346-48484002368-21munin-node0
10050450,0irq/346-48484002368-21munin-node0
81440,0rcu_preempt19-21ksoftirqd/112:29:071
81440,0rcu_preempt19-21ksoftirqd/111:01:131
81440,0rcu_preempt17921-21munin-node1
10050440,0irq/346-48484004273-21munin-node0
9950430,0irq/345-484840023309-21munin-node0
81430,0rcu_preempt8151-21ssh11:56:111
81430,0rcu_preempt19-21ksoftirqd/112:29:481
81430,0rcu_preempt19-21ksoftirqd/112:29:481
81430,0rcu_preempt19-21ksoftirqd/110:04:371
81430,0rcu_preempt19-21ksoftirqd/110:04:371
81430,0rcu_preempt19-21ksoftirqd/109:34:461
81430,0rcu_preempt19-21ksoftirqd/108:39:381
81430,0rcu_preempt19-21ksoftirqd/107:34:331
10050430,0irq/346-484840021847-21ssh08:29:310
81420,0rcu_preempt19-21ksoftirqd/112:15:041
81420,0rcu_preempt19-21ksoftirqd/110:34:291
81420,0rcu_preempt19-21ksoftirqd/108:59:351
81420,0rcu_preempt19-21ksoftirqd/107:29:271
81420,0rcu_preempt19-21ksoftirqd/107:29:271
10050420,0irq/346-48484003-21ksoftirqd/007:24:410
81400,0rcu_preempt19-21ksoftirqd/108:49:391
81400,0rcu_preempt19-21ksoftirqd/108:34:341
81400,0rcu_preempt19-21ksoftirqd/107:24:381
81400,0rcu_preempt19-21ksoftirqd/107:09:391
81390,0rcu_preempt19-21ksoftirqd/108:45:441
81390,0rcu_preempt19-21ksoftirqd/107:50:461
81370,0rcu_preempt19-21ksoftirqd/107:14:351
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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