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2026-03-20 - 05:26

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 Fri Mar 20, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811150,0rcu_preempt19-21ksoftirqd/120:30:421
811090,0rcu_preempt19-21ksoftirqd/120:19:211
811070,0rcu_preempt19-21ksoftirqd/121:59:101
811030,0rcu_preempt19-21ksoftirqd/121:09:311
811020,0rcu_preempt19-21ksoftirqd/122:19:231
81990,0rcu_preempt19-21ksoftirqd/123:54:121
81990,0rcu_preempt19-21ksoftirqd/119:44:271
81970,0rcu_preempt19-21ksoftirqd/122:59:191
81970,0rcu_preempt19-21ksoftirqd/122:59:191
81960,0rcu_preempt19-21ksoftirqd/121:31:341
81960,0rcu_preempt0-21swapper/123:31:101
81950,0rcu_preempt19-21ksoftirqd/122:14:061
81940,0rcu_preempt19-21ksoftirqd/122:40:151
81940,0rcu_preempt19-21ksoftirqd/121:34:071
81940,0rcu_preempt19-21ksoftirqd/100:29:201
81920,0rcu_preempt54-21kswapd021:49:141
81910,0rcu_preempt19-21ksoftirqd/122:52:181
81910,0rcu_preempt19-21ksoftirqd/121:16:301
81870,0rcu_preempt54-21kswapd023:34:121
81870,0rcu_preempt54-21kswapd021:57:511
81860,0rcu_preempt54-21kswapd023:39:561
81860,0rcu_preempt19-21ksoftirqd/123:04:421
81860,0rcu_preempt0-21swapper/100:01:571
81850,0rcu_preempt19-21ksoftirqd/120:44:171
81850,0rcu_preempt0-21swapper/123:16:181
81840,0rcu_preempt19-21ksoftirqd/122:38:021
81840,0rcu_preempt19-21ksoftirqd/122:31:401
81840,0rcu_preempt19-21ksoftirqd/121:21:411
81840,0rcu_preempt19-21ksoftirqd/100:22:551
81830,0rcu_preempt19-21ksoftirqd/121:41:161
81830,0rcu_preempt19-21ksoftirqd/121:25:431
81820,0rcu_preempt19-21ksoftirqd/120:24:081
81820,0rcu_preempt19-21ksoftirqd/100:10:231
81810,0rcu_preempt19-21ksoftirqd/120:09:141
81800,0rcu_preempt19-21ksoftirqd/123:49:161
81800,0rcu_preempt19-21ksoftirqd/123:49:161
81780,0rcu_preempt19-21ksoftirqd/120:14:111
81780,0rcu_preempt19-21ksoftirqd/120:14:111
81770,0rcu_preempt19-21ksoftirqd/119:24:121
81760,0rcu_preempt54-21kswapd022:28:291
10050740,0irq/346-484840054-21kswapd023:38:570
81730,0rcu_preempt1470-21runrttasks19:59:381
81720,0rcu_preempt54-21kswapd022:15:590
81720,0rcu_preempt19-21ksoftirqd/123:12:011
81710,0rcu_preempt19-21ksoftirqd/120:59:211
81710,0rcu_preempt0-21swapper/123:46:221
81690,0rcu_preempt7019-21kworker/1:120:54:131
81690,0rcu_preempt19-21ksoftirqd/122:45:481
81690,0rcu_preempt19-21ksoftirqd/120:05:581
81690,0rcu_preempt19-21ksoftirqd/100:07:171
81680,0rcu_preempt0-21swapper/122:57:441
81680,0rcu_preempt0-21swapper/100:17:011
81670,0rcu_preempt19-21ksoftirqd/122:04:211
81660,0rcu_preempt19-21ksoftirqd/123:19:081
81650,0rcu_preempt19-21ksoftirqd/120:34:131
81650,0rcu_preempt19-21ksoftirqd/119:20:181
81650,0rcu_preempt19-21ksoftirqd/100:35:031
81650,0rcu_preempt17016-21ssh00:27:031
81640,0rcu_preempt19-21ksoftirqd/123:25:231
81640,0rcu_preempt11936-21ping19:40:221
81630,0rcu_preempt19-21ksoftirqd/122:13:121
81630,0rcu_preempt19-21ksoftirqd/119:33:561
81620,0rcu_preempt3-21ksoftirqd/023:09:470
81620,0rcu_preempt19-21ksoftirqd/120:49:191
81620,0rcu_preempt19-21ksoftirqd/120:42:121
81610,0rcu_preempt3-21ksoftirqd/023:32:390
81600,0rcu_preempt19-21ksoftirqd/119:09:171
81580,0rcu_preempt9238-21kworker/u4:221:04:211
81580,0rcu_preempt7019-21kworker/1:121:45:571
81580,0rcu_preempt7019-21kworker/1:121:45:571
81580,0rcu_preempt19-21ksoftirqd/119:54:171
81550,0rcu_preempt19-21ksoftirqd/119:38:071
81550,0rcu_preempt0-21swapper/119:14:281
81530,0rcu_preempt3-21ksoftirqd/020:04:230
81530,0rcu_preempt3-21ksoftirqd/019:04:140
10050520,0irq/346-484840032046-1kworker/0:1H22:39:590
10050520,0irq/346-484840031565-1kworker/0:2H23:36:370
10050520,0irq/346-484840023845-1kworker/0:1H00:15:000
10050510,0irq/346-4848400851-21rngd00:26:170
10050510,0irq/346-48484002392-21ssh00:12:190
10050500,0irq/346-4848400851-21rngd21:11:350
10050500,0irq/346-484840017210-1kworker/0:1H22:19:550
81490,0rcu_preempt22503-21memory19:49:151
10050490,0irq/346-484840013282-1kworker/0:2H23:20:050
81480,0rcu_preempt3-21ksoftirqd/022:59:150
81480,0rcu_preempt3-21ksoftirqd/022:59:150
10050480,0irq/346-4848400851-21rngd21:45:410
10050480,0irq/346-4848400851-21rngd21:45:410
10050480,0irq/346-484840010976-21ssh23:14:380
10050470,0irq/346-484840021418-21ssh00:31:210
10050470,0irq/346-484840018948-1kworker/0:3H23:56:190
10050470,0irq/346-48484000-21swapper/021:33:550
865599469,0cyclictest1328250kworker/0:2H23:27:050
81460,0rcu_preempt3-21ksoftirqd/021:25:190
10050460,0irq/346-48484000-21swapper/021:51:210
81450,0rcu_preempt3-21ksoftirqd/023:47:560
81450,0rcu_preempt3-21ksoftirqd/021:22:280
13250450,0irq/301-48020000-21swapper/022:49:090
10050450,0irq/346-484840054-21kswapd000:03:300
1599440,0migration/02792-21diskmemload22:34:130
10050440,0irq/346-48484003-21ksoftirqd/020:25:160
10050440,0irq/346-48484001683-21ssh22:33:200
81430,0rcu_preempt3-21ksoftirqd/022:25:080
81430,0rcu_preempt3-21ksoftirqd/022:05:050
81430,0rcu_preempt3-21ksoftirqd/021:36:070
81430,0rcu_preempt19-21ksoftirqd/119:08:551
10050430,0irq/346-484840054-21kswapd000:20:540
10050430,0irq/346-484840021104-1kworker/0:2H00:35:560
10050430,0irq/346-48484000-21swapper/021:14:530
10050430,0irq/346-48484000-21swapper/020:54:070
81420,0rcu_preempt3-21ksoftirqd/022:54:060
81420,0rcu_preempt3-21ksoftirqd/020:28:560
10050420,0irq/346-48484004621-21ssh22:03:290
10050420,0irq/346-484840014524-21ssh22:45:410
9950410,0irq/345-48484000-21swapper/021:42:520
81410,0rcu_preempt3-21ksoftirqd/023:52:170
81410,0rcu_preempt3-21ksoftirqd/023:52:170
81410,0rcu_preempt3-21ksoftirqd/023:08:380
81410,0rcu_preempt3-21ksoftirqd/020:44:090
81410,0rcu_preempt28105-21php-cgi21:54:130
10050410,0irq/346-484840012292-21ssh22:10:350
9950400,0irq/345-484840015870-21irqstats19:29:190
81400,0rcu_preempt3-21ksoftirqd/019:14:050
81400,0rcu_preempt28493-21apt-get20:09:060
81400,0rcu_preempt14158-21apt-get21:04:050
4350400,0irq/32-433000006133-21dropbear20:39:090
10050400,0irq/346-484840026443-21aten_rapower_cu00:04:060
9950390,0irq/345-48484000-21swapper/019:49:060
81390,0rcu_preempt3-21ksoftirqd/019:54:070
1599390,0migration/032051-21http_loadtime20:19:140
10050390,0irq/346-484840025251-21aten_rapower_cu19:59:080
10050390,0irq/346-48484000-21swapper/020:34:200
865599381,0cyclictest24979-21ping20:16:150
865599381,0cyclictest24979-21ping20:16:150
81380,0rcu_preempt3-21ksoftirqd/019:44:150
81380,0rcu_preempt3-21ksoftirqd/019:39:290
81380,0rcu_preempt3-21ksoftirqd/019:24:280
10050380,0irq/346-484840014013-21idleruntime-cro21:03:550
98622370,0sleep07985-1kworker/0:0H19:09:280
8655993713,0cyclictest0-21swapper/019:38:300
81370,0rcu_preempt3-21ksoftirqd/020:49:190
81370,0rcu_preempt3-21ksoftirqd/019:19:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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