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2026-04-13 - 08:57

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 Apr 13, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81780,0rcu_preempt3-21ksoftirqd/020:18:440
81720,0rcu_preempt14330-21kworker/0:022:40:520
81700,0rcu_preempt19-21ksoftirqd/122:33:481
81690,0rcu_preempt32005-21rm22:29:001
81680,0rcu_preempt30580-21kworker/0:000:11:350
81670,0rcu_preempt20233-21kworker/0:121:46:390
81660,0rcu_preempt518-21kworker/0:123:52:020
81660,0rcu_preempt3-21ksoftirqd/021:03:580
81660,0rcu_preempt30580-21kworker/0:000:38:180
81660,0rcu_preempt20233-21kworker/0:121:59:500
81650,0rcu_preempt18266-21kworker/0:222:52:300
81650,0rcu_preempt11834-21kworker/0:200:06:000
81640,0rcu_preempt54-21kswapd021:13:530
81640,0rcu_preempt5359-21kworker/0:020:43:330
81630,0rcu_preempt3-21ksoftirqd/022:23:450
81620,0rcu_preempt3-21ksoftirqd/019:23:430
81620,0rcu_preempt30508-21kworker/0:021:26:270
81620,0rcu_preempt24143-21kworker/u4:122:10:490
81620,0rcu_preempt0-21swapper/023:12:390
81620,0rcu_preempt0-21swapper/021:41:430
81620,0rcu_preempt0-21swapper/000:32:010
81610,0rcu_preempt3-21ksoftirqd/020:38:580
81610,0rcu_preempt30508-21kworker/0:021:23:290
81610,0rcu_preempt19-21ksoftirqd/100:18:551
81610,0rcu_preempt19-21ksoftirqd/100:13:471
81610,0rcu_preempt11834-21kworker/0:200:01:450
81610,0rcu_preempt10830-21dropbear20:48:490
81600,0rcu_preempt0-21swapper/022:35:460
81600,0rcu_preempt0-21swapper/021:12:370
81600,0rcu_preempt0-21swapper/000:22:390
81590,0rcu_preempt0-21swapper/023:48:130
81590,0rcu_preempt0-21swapper/023:04:420
81590,0rcu_preempt0-21swapper/022:32:020
81590,0rcu_preempt0-21swapper/022:22:250
81590,0rcu_preempt0-21swapper/021:29:080
81590,0rcu_preempt0-21swapper/000:24:260
81580,0rcu_preempt3-21ksoftirqd/023:57:200
81580,0rcu_preempt3-21ksoftirqd/021:35:430
81580,0rcu_preempt18266-21kworker/0:222:55:530
81580,0rcu_preempt0-21swapper/023:34:510
81580,0rcu_preempt0-21swapper/023:20:480
81580,0rcu_preempt0-21swapper/023:20:480
81580,0rcu_preempt0-21swapper/022:47:370
81580,0rcu_preempt0-21swapper/021:55:360
81580,0rcu_preempt0-21swapper/000:16:220
81570,0rcu_preempt3-21ksoftirqd/022:03:510
81570,0rcu_preempt3-21ksoftirqd/022:03:510
81570,0rcu_preempt3-21ksoftirqd/019:46:090
81570,0rcu_preempt3-21ksoftirqd/019:46:090
81570,0rcu_preempt0-21swapper/023:30:110
81570,0rcu_preempt0-21swapper/023:15:590
10050570,0irq/346-48484002696-1kworker/1:1H23:14:531
81560,0rcu_preempt31694-21kworker/0:023:42:290
81560,0rcu_preempt0-21swapper/023:02:090
81560,0rcu_preempt0-21swapper/021:52:500
81550,0rcu_preempt19546-21kworker/0:219:36:160
10050550,0irq/346-484840014776-21ssh00:23:531
81540,0rcu_preempt3-21ksoftirqd/020:54:000
81540,0rcu_preempt3-21ksoftirqd/019:28:440
81540,0rcu_preempt19-21ksoftirqd/122:49:031
81540,0rcu_preempt19-21ksoftirqd/121:33:451
81530,0rcu_preempt3-21ksoftirqd/019:39:450
81530,0rcu_preempt3-21ksoftirqd/019:20:000
81530,0rcu_preempt10050-21cyclictest22:14:410
81520,0rcu_preempt17057-21diskmemload00:28:571
81520,0rcu_preempt0-21swapper/020:37:060
10050520,0irq/346-484840054-21kswapd023:10:141
81510,0rcu_preempt3-21ksoftirqd/020:59:080
81510,0rcu_preempt0-21swapper/023:28:080
81500,0rcu_preempt3-21ksoftirqd/019:13:580
81500,0rcu_preempt19-21ksoftirqd/121:03:331
10050500,0irq/346-484840014503-1kworker/1:3H23:58:571
81490,0rcu_preempt3-21ksoftirqd/019:08:540
81490,0rcu_preempt3-21ksoftirqd/019:08:540
10050490,0irq/346-484840054-21kswapd022:43:551
10050490,0irq/346-484840054-21kswapd022:21:221
10050490,0irq/346-484840031701-1kworker/1:0H21:57:161
9950480,0irq/345-484840030170-1kworker/1:3H23:01:311
81480,0rcu_preempt19-21ksoftirqd/100:03:541
10050480,0irq/346-484840017011-1kworker/1:2H21:44:361
9950470,0irq/345-48484009122-21runrttasks19:03:540
81470,0rcu_preempt3529-21kworker/0:220:25:270
81470,0rcu_preempt3-21ksoftirqd/020:08:490
81470,0rcu_preempt3-21ksoftirqd/019:59:040
81470,0rcu_preempt19-21ksoftirqd/123:33:441
81470,0rcu_preempt19-21ksoftirqd/120:23:441
81470,0rcu_preempt19-21ksoftirqd/120:18:591
10050470,0irq/346-484840054-21kswapd021:39:441
10050470,0irq/346-484840032148-1kworker/1:0H23:49:311
9950460,0irq/345-48484004689-1kworker/1:3H23:43:591
81460,0rcu_preempt19-21ksoftirqd/123:38:441
81460,0rcu_preempt19-21ksoftirqd/122:53:441
9950450,0irq/345-484840010050-21cyclictest19:43:321
81450,0rcu_preempt7266-21ntpq22:03:561
81450,0rcu_preempt7266-21ntpq22:03:561
81450,0rcu_preempt3-21ksoftirqd/020:03:550
10050450,0irq/346-4848400851-21rngd22:08:451
10050450,0irq/346-484840015154-1kworker/1:0H21:14:471
10050450,0irq/346-484840013331-21ping19:34:071
81440,0rcu_preempt3529-21kworker/0:220:28:490
81440,0rcu_preempt3-21ksoftirqd/019:53:540
81440,0rcu_preempt23905-21meminfo19:48:560
81440,0rcu_preempt19-21ksoftirqd/123:53:441
81440,0rcu_preempt19-21ksoftirqd/120:58:441
81440,0rcu_preempt19-21ksoftirqd/119:28:421
10050440,0irq/346-484840054-21kswapd023:07:381
10050440,0irq/346-484840054-21kswapd021:58:411
10050440,0irq/346-484840054-21kswapd021:49:051
10050440,0irq/346-484840024759-21ssh00:33:571
81430,0rcu_preempt426-21ntpq21:23:571
81430,0rcu_preempt19-21ksoftirqd/123:28:441
81430,0rcu_preempt19-21ksoftirqd/123:23:431
81430,0rcu_preempt19-21ksoftirqd/122:23:441
81430,0rcu_preempt19-21ksoftirqd/120:33:441
81430,0rcu_preempt19-21ksoftirqd/119:18:491
81430,0rcu_preempt17057-21diskmemload21:18:521
81420,0rcu_preempt31969-21apt-get00:08:431
81420,0rcu_preempt26273-21ping20:14:010
81420,0rcu_preempt19-21ksoftirqd/122:38:511
81420,0rcu_preempt19-21ksoftirqd/122:13:441
81420,0rcu_preempt19-21ksoftirqd/120:48:451
81420,0rcu_preempt19-21ksoftirqd/119:08:441
81420,0rcu_preempt19-21ksoftirqd/119:08:441
81410,0rcu_preempt19-21ksoftirqd/123:18:471
81410,0rcu_preempt19-21ksoftirqd/123:18:471
81410,0rcu_preempt19-21ksoftirqd/121:28:441
81410,0rcu_preempt19-21ksoftirqd/121:08:441
81410,0rcu_preempt19-21ksoftirqd/120:53:431
81410,0rcu_preempt19-21ksoftirqd/120:38:421
81410,0rcu_preempt19-21ksoftirqd/120:08:591
81400,0rcu_preempt19-21ksoftirqd/119:48:451
81400,0rcu_preempt13331-21ping19:18:321
81390,0rcu_preempt19-21ksoftirqd/120:13:501
10050390,0irq/346-484840019-21ksoftirqd/119:58:591
81380,0rcu_preempt19-21ksoftirqd/120:03:451
81380,0rcu_preempt19-21ksoftirqd/119:03:401
81380,0rcu_preempt0-21swapper/120:43:491
81360,0rcu_preempt19-21ksoftirqd/119:53:491
81360,0rcu_preempt19-21ksoftirqd/119:44:091
81360,0rcu_preempt19-21ksoftirqd/119:44:091
81360,0rcu_preempt19-21ksoftirqd/119:24:521
10050320,0irq/346-48484000-21swapper/120:28:531
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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