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2026-05-24 - 05:56

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 Sun May 24, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81840,0rcu_preempt3-21ksoftirqd/019:25:580
10050810,0irq/346-484840013829-1kworker/0:1H21:44:260
10050760,0irq/346-48484008765-1kworker/0:0H22:43:590
10050760,0irq/346-484840028560-1kworker/0:0H00:05:170
10050750,0irq/346-48484006272-1kworker/0:1H23:13:060
10050750,0irq/346-484840054-21kswapd022:23:260
10050750,0irq/346-484840026208-1kworker/0:2H23:30:530
10050740,0irq/346-484840018631-1kworker/0:0H23:56:170
81730,0rcu_preempt3-21ksoftirqd/022:41:090
10050730,0irq/346-48484001087-1kworker/0:2H00:28:580
81710,0rcu_preempt3-21ksoftirqd/020:33:150
81710,0rcu_preempt19935-21apt-get19:48:050
10050710,0irq/346-484840015192-1kworker/0:0H00:27:400
10050710,0irq/346-484840013353-1kworker/0:0H21:08:220
10050710,0irq/346-48484001283-1kworker/0:2H23:06:510
81690,0rcu_preempt3-21ksoftirqd/023:36:410
81690,0rcu_preempt3-21ksoftirqd/022:34:290
10050680,0irq/346-484840021248-1kworker/0:0H21:15:410
81640,0rcu_preempt22880-21ping20:03:180
10050640,0irq/346-484840054-21kswapd021:13:321
10050630,0irq/346-484840011226-1kworker/0:3H22:12:470
81620,0rcu_preempt3-21ksoftirqd/000:33:220
81620,0rcu_preempt19-21ksoftirqd/119:36:211
10050620,0irq/346-48484001087-1kworker/0:2H00:10:580
81600,0rcu_preempt26897-21rm22:58:150
10050600,0irq/346-484840021243-1kworker/0:2H22:22:230
81590,0rcu_preempt7417-21ssh00:17:040
81590,0rcu_preempt3741-21ssh23:08:040
81590,0rcu_preempt3-21ksoftirqd/022:53:050
81590,0rcu_preempt3-21ksoftirqd/022:53:050
81590,0rcu_preempt3-21ksoftirqd/022:48:340
81580,0rcu_preempt3-21ksoftirqd/023:43:060
81580,0rcu_preempt3-21ksoftirqd/020:18:050
81580,0rcu_preempt19-21ksoftirqd/123:58:231
81570,0rcu_preempt3-21ksoftirqd/021:37:540
81570,0rcu_preempt3-21ksoftirqd/020:08:150
81570,0rcu_preempt3-21ksoftirqd/019:13:050
81560,0rcu_preempt3-21ksoftirqd/022:28:040
81560,0rcu_preempt3-21ksoftirqd/022:13:190
81560,0rcu_preempt3-21ksoftirqd/021:23:070
10050560,0irq/346-484840054-21kswapd022:22:441
9950550,0irq/345-484840030422-1kworker/1:0H22:35:161
81550,0rcu_preempt3-21ksoftirqd/019:53:170
81550,0rcu_preempt20992-21ssh23:58:050
10050550,0irq/346-48484006461-21ssh21:33:041
81540,0rcu_preempt3-21ksoftirqd/023:50:570
81540,0rcu_preempt3-21ksoftirqd/023:22:210
81540,0rcu_preempt3-21ksoftirqd/022:01:540
81540,0rcu_preempt3-21ksoftirqd/021:35:490
81540,0rcu_preempt3-21ksoftirqd/019:18:040
81540,0rcu_preempt24294-21kworker/0:020:01:080
6657995412,0cyclictest26053-1kworker/0:1H21:52:570
6657995412,0cyclictest26053-1kworker/0:1H21:52:570
81530,0rcu_preempt3-21ksoftirqd/023:42:390
81530,0rcu_preempt3-21ksoftirqd/021:18:130
81530,0rcu_preempt3-21ksoftirqd/020:53:160
81530,0rcu_preempt3-21ksoftirqd/020:23:230
81530,0rcu_preempt3-21ksoftirqd/000:21:210
81530,0rcu_preempt22211-21kworker/0:121:52:230
10050530,0irq/346-48484000-21swapper/020:38:110
10050530,0irq/346-48484000-21swapper/020:38:110
81520,0rcu_preempt5362-21kworker/1:023:23:041
81520,0rcu_preempt3-21ksoftirqd/023:23:300
81520,0rcu_preempt3-21ksoftirqd/021:03:120
81520,0rcu_preempt3-21ksoftirqd/020:28:170
81520,0rcu_preempt3-21ksoftirqd/020:13:050
81520,0rcu_preempt1455-21apt-get21:28:030
81510,0rcu_preempt19-21ksoftirqd/120:13:211
81500,0rcu_preempt6146-21ssh22:04:460
81500,0rcu_preempt3-21ksoftirqd/020:58:080
81500,0rcu_preempt3-21ksoftirqd/020:58:080
9950490,0irq/345-484840054-21kswapd020:08:101
81490,0rcu_preempt19-21ksoftirqd/122:13:051
81490,0rcu_preempt19-21ksoftirqd/122:08:161
10050490,0irq/346-48484003750-1kworker/1:2H23:41:231
9950480,0irq/345-484840013770-1kworker/1:1H22:47:551
81480,0rcu_preempt54-21kswapd023:11:041
81480,0rcu_preempt3-21ksoftirqd/020:43:190
81480,0rcu_preempt19-21ksoftirqd/100:33:071
81480,0rcu_preempt11620-21kworker/1:121:31:481
81470,0rcu_preempt3-21ksoftirqd/019:03:120
81470,0rcu_preempt19-21ksoftirqd/122:46:581
81470,0rcu_preempt19-21ksoftirqd/121:08:221
81460,0rcu_preempt3-21ksoftirqd/019:08:290
81460,0rcu_preempt19-21ksoftirqd/122:39:331
81460,0rcu_preempt19-21ksoftirqd/121:58:051
81450,0rcu_preempt23480-21kworker/0:019:38:190
81450,0rcu_preempt19-21ksoftirqd/122:28:041
81450,0rcu_preempt19-21ksoftirqd/121:43:151
81450,0rcu_preempt19-21ksoftirqd/121:23:211
81450,0rcu_preempt19-21ksoftirqd/121:22:081
81440,0rcu_preempt23480-21kworker/0:019:43:110
81440,0rcu_preempt23480-21kworker/0:019:33:360
81440,0rcu_preempt19-21ksoftirqd/123:56:141
81440,0rcu_preempt19-21ksoftirqd/123:46:061
81440,0rcu_preempt19-21ksoftirqd/119:13:051
81440,0rcu_preempt19-21ksoftirqd/100:32:221
81440,0rcu_preempt13659-21diskmemload23:03:461
10050440,0irq/346-484840022199-21ntp_offset21:48:201
81430,0rcu_preempt6656-21cyclictest00:13:061
81430,0rcu_preempt3-21ksoftirqd/020:48:130
81430,0rcu_preempt19-21ksoftirqd/122:26:511
81430,0rcu_preempt19-21ksoftirqd/121:42:201
81430,0rcu_preempt19-21ksoftirqd/119:38:071
81430,0rcu_preempt19-21ksoftirqd/119:03:161
81420,0rcu_preempt3-21ksoftirqd/019:28:130
81420,0rcu_preempt19-21ksoftirqd/123:33:061
81420,0rcu_preempt19-21ksoftirqd/123:28:081
81420,0rcu_preempt19-21ksoftirqd/123:13:111
81420,0rcu_preempt19-21ksoftirqd/122:04:191
81420,0rcu_preempt19-21ksoftirqd/119:43:171
10050420,0irq/346-484840054-21kswapd020:23:561
10050420,0irq/346-48484002237-21ssh00:11:441
10050420,0irq/346-484840011160-21seq00:20:291
81410,0rcu_preempt19-21ksoftirqd/123:18:101
81410,0rcu_preempt19-21ksoftirqd/121:53:261
81410,0rcu_preempt19-21ksoftirqd/121:53:261
81410,0rcu_preempt19-21ksoftirqd/120:57:541
81410,0rcu_preempt19-21ksoftirqd/120:22:541
81400,0rcu_preempt19-21ksoftirqd/123:50:451
81400,0rcu_preempt19-21ksoftirqd/122:58:041
81400,0rcu_preempt19-21ksoftirqd/120:58:101
81400,0rcu_preempt19-21ksoftirqd/120:58:101
81400,0rcu_preempt19-21ksoftirqd/100:03:081
10050400,0irq/346-48484009939-21ping19:23:111
81390,0rcu_preempt23059-21munin-run19:57:531
81390,0rcu_preempt19-21ksoftirqd/122:53:111
81390,0rcu_preempt19-21ksoftirqd/122:53:111
81390,0rcu_preempt19-21ksoftirqd/119:57:541
10050390,0irq/346-484840054-21kswapd000:26:451
81380,0rcu_preempt19-21ksoftirqd/120:07:541
81380,0rcu_preempt19-21ksoftirqd/119:48:181
81370,0rcu_preempt19-21ksoftirqd/120:33:181
81370,0rcu_preempt19-21ksoftirqd/120:28:131
81370,0rcu_preempt19-21ksoftirqd/119:31:071
81370,0rcu_preempt19-21ksoftirqd/119:18:051
81370,0rcu_preempt19-21ksoftirqd/119:12:531
81340,0rcu_preempt19-21ksoftirqd/120:42:531
81340,0rcu_preempt19-21ksoftirqd/120:42:531
10050330,0irq/346-48484006230-21ntpq20:43:161
10050330,0irq/346-484840012169-21munin-node1
10050320,0irq/346-48484008738-21ls20:52:531
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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