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2026-04-04 - 03:47

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 Sat Apr 04, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81930,0rcu_preempt19-21ksoftirqd/123:54:061
81920,0rcu_preempt9950irq/345-484840023:28:231
81770,0rcu_preempt17588-1kworker/0:0H23:39:030
81720,0rcu_preempt19-21ksoftirqd/123:44:071
81700,0rcu_preempt19-21ksoftirqd/121:04:031
81680,0rcu_preempt19-21ksoftirqd/120:43:531
81660,0rcu_preempt6752-1kworker/0:0H19:49:020
81610,0rcu_preempt3-21ksoftirqd/022:39:090
81610,0rcu_preempt19-21ksoftirqd/100:08:501
81590,0rcu_preempt26578-1kworker/0:0H22:08:420
81590,0rcu_preempt2276-21diskmemload21:41:091
10050570,0irq/346-484840011155-1kworker/0:2H22:58:420
81560,0rcu_preempt19-21ksoftirqd/122:28:521
81560,0rcu_preempt19-21ksoftirqd/120:13:591
10050560,0irq/346-484840032447-1kworker/0:3H00:00:030
10050560,0irq/346-484840023183-1kworker/0:1H23:54:130
81550,0rcu_preempt19-21ksoftirqd/119:03:561
81540,0rcu_preempt19-21ksoftirqd/123:18:561
81540,0rcu_preempt19-21ksoftirqd/121:24:041
10050540,0irq/346-48484009609-1kworker/0:3H21:18:080
10050540,0irq/346-484840021068-1kworker/0:0H23:08:400
81530,0rcu_preempt19-21ksoftirqd/100:04:061
10050520,0irq/346-484840030428-1kworker/0:2H00:38:030
81510,0rcu_preempt2276-21diskmemload22:54:021
81510,0rcu_preempt19-21ksoftirqd/122:24:101
81510,0rcu_preempt19-21ksoftirqd/122:04:051
10050510,0irq/346-484840011155-1kworker/0:2H22:57:490
10050510,0irq/346-48484000-21swapper/000:23:400
81500,0rcu_preempt19-21ksoftirqd/123:33:541
10050500,0irq/346-48484008918-1kworker/0:2H22:23:180
10050500,0irq/346-48484000-21swapper/023:45:510
81490,0rcu_preempt12625-1kworker/0:2H23:30:510
10050490,0irq/346-48484006792-1kworker/0:0H21:53:260
10050490,0irq/346-484840028713-1kworker/0:1H22:44:040
10050490,0irq/346-484840016118-1kworker/0:1H23:09:210
10050490,0irq/346-484840013477-21munin-node0
10050490,0irq/346-48484000-21swapper/021:41:360
9950480,0irq/345-48484007680-1kworker/0:0H23:27:420
10050480,0irq/346-484840028251-1kworker/0:0H23:48:540
10050480,0irq/346-484840027461-21ssh22:06:460
9950470,0irq/345-484840015810-21apt-get23:33:510
81470,0rcu_preempt32384-1kworker/0:1H19:24:130
81470,0rcu_preempt32384-1kworker/0:1H19:24:130
81470,0rcu_preempt19-21ksoftirqd/123:49:041
81470,0rcu_preempt19-21ksoftirqd/121:19:411
81470,0rcu_preempt19-21ksoftirqd/120:48:421
10050470,0irq/346-48484002863-21fw_packets21:08:580
9950460,0irq/345-48484001389-21ssh00:24:080
81460,0rcu_preempt19-21ksoftirqd/123:09:021
81460,0rcu_preempt18632-21kworker/0:100:11:130
10050460,0irq/346-48484006792-1kworker/0:0H21:47:040
10050460,0irq/346-48484006060-21munin-node0
10050460,0irq/346-48484005325-21ssh22:17:250
10050460,0irq/346-484840031080-1kworker/0:3H20:59:010
10050460,0irq/346-484840030285-21ssh21:36:470
10050460,0irq/346-484840023514-21ssh22:03:040
10050460,0irq/346-48484000-21swapper/021:58:150
9950450,0irq/345-484840012431-21zcat22:24:060
81450,0rcu_preempt19-21ksoftirqd/123:13:561
81450,0rcu_preempt19-21ksoftirqd/120:33:421
81450,0rcu_preempt19-21ksoftirqd/100:33:411
10050450,0irq/346-48484003889-21sendmail-mta19:34:010
10050450,0irq/346-484840017221-21munin-node0
10050450,0irq/346-484840016766-21aten_rapower_cu20:13:520
10050450,0irq/346-484840015267-21ssh21:21:260
9950440,0irq/345-484840026193-21apt-get19:03:510
9950440,0irq/345-484840021368-21ssh22:33:510
9950440,0irq/345-484840011422-21ping20:09:070
81440,0rcu_preempt19-21ksoftirqd/121:49:391
81440,0rcu_preempt19-21ksoftirqd/120:02:271
10050440,0irq/346-48484002757-1kworker/0:1H23:21:350
10050440,0irq/346-484840023912-21ssh21:29:500
10050440,0irq/346-484840011670-21latency_hist19:58:410
10050430,0irq/346-48484006267-1kworker/0:0H22:30:090
10050430,0irq/346-484840024822-21idleruntime-cro20:38:410
10050430,0irq/346-48484002030-21wget19:28:530
10050430,0irq/346-48484000-21swapper/023:13:570
9950420,0irq/345-48484005504-21munin-node0
9950420,0irq/345-484840025626-21tr20:39:030
81420,0rcu_preempt54-21kswapd021:44:071
81420,0rcu_preempt19-21ksoftirqd/122:35:301
81420,0rcu_preempt19-21ksoftirqd/121:36:081
81420,0rcu_preempt19-21ksoftirqd/120:24:011
81420,0rcu_preempt19-21ksoftirqd/120:19:031
81420,0rcu_preempt19-21ksoftirqd/120:09:001
81420,0rcu_preempt19-21ksoftirqd/119:43:571
81420,0rcu_preempt19-21ksoftirqd/119:31:431
81420,0rcu_preempt19-21ksoftirqd/119:21:471
81420,0rcu_preempt19-21ksoftirqd/119:21:471
81420,0rcu_preempt19-21ksoftirqd/100:24:021
81420,0rcu_preempt18385-21kworker/1:022:18:111
10050420,0irq/346-4848400851-21rngd22:48:500
10050420,0irq/346-484840013372-21http_loadtime00:03:590
9950410,0irq/345-4848400851-21rngd21:56:141
9950410,0irq/345-48484001425-21ntp_kernel_err21:04:030
9950410,0irq/345-48484001339-21snmpd19:59:030
9950410,0irq/345-48484000-21swapper/000:13:510
81410,0rcu_preempt6236-21ssh00:29:071
81410,0rcu_preempt30976-21ping19:39:031
81410,0rcu_preempt19-21ksoftirqd/122:18:411
81410,0rcu_preempt19-21ksoftirqd/120:04:081
81410,0rcu_preempt19-21ksoftirqd/119:36:381
81410,0rcu_preempt19-21ksoftirqd/119:23:441
81410,0rcu_preempt19-21ksoftirqd/119:23:441
9950400,0irq/345-48484000-21swapper/019:44:090
81400,0rcu_preempt21657-21ssh23:39:061
81400,0rcu_preempt19-21ksoftirqd/122:59:101
81400,0rcu_preempt19-21ksoftirqd/122:51:541
81400,0rcu_preempt19-21ksoftirqd/122:39:511
81400,0rcu_preempt19-21ksoftirqd/119:58:141
81400,0rcu_preempt19-21ksoftirqd/100:19:051
200462400,0chrt19586-1kworker/0:3H20:23:470
81390,0rcu_preempt19-21ksoftirqd/123:33:041
81390,0rcu_preempt19-21ksoftirqd/122:44:401
81390,0rcu_preempt19-21ksoftirqd/121:09:081
2769799392,0cyclictest11422-21ping20:21:580
10050390,0irq/346-484840022625-21ls20:29:060
81380,0rcu_preempt19-21ksoftirqd/123:03:581
81380,0rcu_preempt19-21ksoftirqd/121:59:051
81380,0rcu_preempt19-21ksoftirqd/121:02:321
81380,0rcu_preempt19-21ksoftirqd/120:28:421
10050380,0irq/346-484840029899-21apt20:53:500
9950370,0irq/345-48484000-21swapper/020:50:550
9950370,0irq/345-48484000-21swapper/019:15:510
81370,0rcu_preempt19-21ksoftirqd/123:58:541
81370,0rcu_preempt19-21ksoftirqd/122:08:541
81370,0rcu_preempt19-21ksoftirqd/121:29:061
81370,0rcu_preempt19-21ksoftirqd/121:16:591
81370,0rcu_preempt19-21ksoftirqd/120:42:051
81370,0rcu_preempt19-21ksoftirqd/100:15:001
9950360,0irq/345-48484000-21swapper/019:08:550
81360,0rcu_preempt19-21ksoftirqd/120:53:451
81360,0rcu_preempt19-21ksoftirqd/119:51:321
81360,0rcu_preempt19-21ksoftirqd/119:09:381
81350,0rcu_preempt19-21ksoftirqd/119:15:001
10050350,0irq/346-484840030629-1kworker/0:3H19:19:020
10050350,0irq/346-484840030629-1kworker/0:3H19:19:020
9950330,0irq/345-48484000-21swapper/020:48:400
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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