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2025-11-15 - 07:41

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 Nov 15, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81990,0rcu_preempt1093-1kworker/1:0H21:35:121
81950,0rcu_preempt16990-1kworker/0:3H19:20:170
81760,0rcu_preempt19-21ksoftirqd/100:20:291
10050760,0irq/346-484840029754-1kworker/0:3H21:57:170
81720,0rcu_preempt3-21ksoftirqd/021:16:410
81710,0rcu_preempt19-21ksoftirqd/123:45:571
15638997124,0cyclictest2835150kworker/0:1H23:52:520
81690,0rcu_preempt15567-21kworker/0:122:45:130
15638996922,0cyclictest7535-21if_err_can021:30:040
81680,0rcu_preempt3-21ksoftirqd/000:00:050
3412680,0sleep010050irq/346-484840020:00:090
81660,0rcu_preempt3-21ksoftirqd/022:40:050
81650,0rcu_preempt3-21ksoftirqd/000:05:150
81650,0rcu_preempt3-21ksoftirqd/000:05:150
15638996525,0cyclictest5284-1kworker/0:0H21:34:570
81640,0rcu_preempt3-21ksoftirqd/022:25:170
81640,0rcu_preempt3-21ksoftirqd/021:23:390
81640,0rcu_preempt3-21ksoftirqd/000:09:540
15638996423,0cyclictest7416-1kworker/0:0H23:26:420
15638996423,0cyclictest13655-1kworker/0:1H21:49:500
81630,0rcu_preempt3-21ksoftirqd/022:19:000
15638996323,0cyclictest8865-1kworker/0:3H21:44:520
15638996323,0cyclictest1062-21sed23:19:410
15638996317,0cyclictest0-21swapper/021:41:550
81620,0rcu_preempt3-21ksoftirqd/000:19:530
197902620,0sleep19950irq/345-484840023:02:371
15638996230,0cyclictest0-21swapper/021:26:580
81610,0rcu_preempt3-21ksoftirqd/023:19:540
81610,0rcu_preempt28792-21apt-get22:34:530
81610,0rcu_preempt2568-21kworker/0:220:09:520
81610,0rcu_preempt2568-21kworker/0:220:09:520
81610,0rcu_preempt23545-1kworker/0:1H19:41:520
15638996130,0cyclictest18881-21ssh22:22:150
15638996122,0cyclictest25147-21ssh00:26:410
81600,0rcu_preempt3-21ksoftirqd/023:35:030
81600,0rcu_preempt3-21ksoftirqd/022:59:530
81600,0rcu_preempt3-21ksoftirqd/000:34:520
15638996025,0cyclictest5787-1kworker/0:4H20:20:110
15638996025,0cyclictest24091-21php-cgi23:46:180
15638996024,0cyclictest10050irq/346-484840023:55:100
81590,0rcu_preempt1982-21meminfo20:05:080
15638995926,0cyclictest32375-21sh21:59:570
15638995924,0cyclictest23178-1kworker/0:2H23:08:110
15638995922,0cyclictest26509-1kworker/0:1H22:34:310
10050590,0irq/346-48484000-21swapper/122:51:561
15638995829,0cyclictest0-21swapper/023:33:040
15638995825,0cyclictest25465-21aten_rapower_en23:09:550
15638995822,0cyclictest10747-1kworker/0:4H22:54:210
81570,0rcu_preempt3-21ksoftirqd/000:30:100
15638995726,0cyclictest19439-21apt-get20:59:530
81560,0rcu_preempt3-21ksoftirqd/020:15:050
81560,0rcu_preempt3-21ksoftirqd/019:09:530
15638995627,0cyclictest8852-21ssh22:10:070
15638995627,0cyclictest17374-1kworker/0:0H20:55:060
15638995625,0cyclictest10747-1kworker/0:4H22:55:200
15638995624,0cyclictest30767-21munin-node0
15638995624,0cyclictest28909-21aten_rapower_cu19:49:530
15638995623,0cyclictest6939-21ssh22:08:110
15638995623,0cyclictest14940-21sh00:14:580
15638995622,0cyclictest9524-21sort20:29:410
15638995621,0cyclictest25139-1kworker/0:3H21:14:360
10050560,0irq/346-484840018861-21ntp_states23:40:101
10050560,0irq/346-484840018861-21ntp_states23:40:101
90472550,0sleep010050irq/346-484840020:25:400
15638995523,0cyclictest20022-1kworker/0:2H23:43:240
15638995523,0cyclictest20022-1kworker/0:2H23:43:240
15638995522,0cyclictest20894-21df_abs19:24:570
81540,0rcu_preempt3-21ksoftirqd/020:34:540
15638995423,0cyclictest13075-21sh20:39:570
15638995422,0cyclictest18911-21ping19:29:580
15638995421,0cyclictest0-21swapper/019:45:110
15638995324,0cyclictest18911-21ping19:34:530
15638995323,0cyclictest20667-1kworker/0:1H21:06:540
15638995323,0cyclictest20667-1kworker/0:1H21:06:540
10050530,0irq/346-484840030651-1kworker/1:0H22:39:591
10050530,0irq/346-484840022432-1kworker/1:0H22:30:081
15638995222,0cyclictest16352-21ssh20:49:570
15638995218,0cyclictest0-21swapper/020:44:560
10050520,0irq/346-48484007360-21ssh22:08:521
9950510,0irq/345-4848400751-21rngd22:34:541
15638995127,0cyclictest17421-21apt-get19:14:520
10050510,0irq/346-48484004232-1kworker/1:2H00:05:101
10050510,0irq/346-48484004232-1kworker/1:2H00:05:101
10050510,0irq/346-484840013654-1kworker/1:1H21:42:071
10050500,0irq/346-484840016728-1kworker/1:1H00:25:151
10050490,0irq/346-48484007616-21ssh21:30:051
10050490,0irq/346-484840031475-1kworker/1:0H23:19:421
10050490,0irq/346-484840027298-21ssh23:11:231
81480,0rcu_preempt31058-21apt-get00:34:531
9950470,0irq/345-484840054-21kswapd020:10:001
9950470,0irq/345-484840054-21kswapd020:10:001
81470,0rcu_preempt19-21ksoftirqd/120:15:071
81470,0rcu_preempt19-21ksoftirqd/120:00:061
10050470,0irq/346-4848400751-21rngd23:25:111
10050470,0irq/346-484840022302-1kworker/1:1H21:10:251
10050470,0irq/346-484840017891-1kworker/1:2H21:45:131
9950460,0irq/345-484840018911-21ping19:19:421
10050460,0irq/346-484840020915-1kworker/1:4H00:31:021
10050460,0irq/346-48484001654-21ssh22:01:211
10050460,0irq/346-484840014138-1kworker/1:1H22:19:551
10050460,0irq/346-48484000-21swapper/121:50:031
9950450,0irq/345-48484000-21swapper/121:54:561
81450,0rcu_preempt19-21ksoftirqd/119:45:211
81450,0rcu_preempt19-21ksoftirqd/119:35:071
81450,0rcu_preempt10427-21kworker/0:019:06:130
10050450,0irq/346-48484005887-1kworker/1:0H20:19:561
10050450,0irq/346-484840025140-1kworker/1:0H21:15:121
10050450,0irq/346-48484000-21swapper/119:54:591
81440,0rcu_preempt3206-1kworker/1:1H23:22:411
81440,0rcu_preempt19-21ksoftirqd/119:30:041
81440,0rcu_preempt19-21ksoftirqd/100:09:431
10050440,0irq/346-484840031822-21ssh23:55:191
10050440,0irq/346-48484000-21swapper/122:14:571
9950430,0irq/345-48484000-21swapper/100:02:021
81430,0rcu_preempt19-21ksoftirqd/123:49:521
81430,0rcu_preempt19-21ksoftirqd/119:21:041
10050430,0irq/346-484840022079-21munin-node1
10050430,0irq/346-484840011639-1kworker/1:0H23:35:111
10050430,0irq/346-48484000-21swapper/119:14:401
81420,0rcu_preempt19-21ksoftirqd/122:47:571
81420,0rcu_preempt19-21ksoftirqd/121:19:551
81420,0rcu_preempt19-21ksoftirqd/100:16:081
81420,0rcu_preempt0-21swapper/122:26:591
10050420,0irq/346-48484009390-21ssh22:10:191
10050420,0irq/346-48484004772-21ssh21:26:141
81410,0rcu_preempt54-21kswapd019:25:001
81410,0rcu_preempt19-21ksoftirqd/122:57:081
81410,0rcu_preempt19-21ksoftirqd/120:24:421
81410,0rcu_preempt19-21ksoftirqd/119:40:191
81400,0rcu_preempt19-21ksoftirqd/123:34:101
81400,0rcu_preempt19-21ksoftirqd/120:05:161
81390,0rcu_preempt19-21ksoftirqd/119:05:101
81370,0rcu_preempt9074-1kworker/1:0H20:29:581
81370,0rcu_preempt19-21ksoftirqd/121:05:041
81370,0rcu_preempt19-21ksoftirqd/121:05:041
81370,0rcu_preempt19-21ksoftirqd/120:54:401
81370,0rcu_preempt19-21ksoftirqd/120:39:421
81370,0rcu_preempt19-21ksoftirqd/120:35:591
81370,0rcu_preempt19-21ksoftirqd/119:49:581
81360,0rcu_preempt19-21ksoftirqd/121:00:101
81350,0rcu_preempt19-21ksoftirqd/120:55:061
81320,0rcu_preempt19-21ksoftirqd/120:44:421
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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