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2025-11-26 - 06:39

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 Wed Nov 26, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811350,0rcu_preempt54-21kswapd019:19:320
81760,0rcu_preempt8273-1kworker/0:0H19:36:450
81760,0rcu_preempt19-21ksoftirqd/121:12:381
81750,0rcu_preempt31131-21cyclictest21:56:151
81750,0rcu_preempt19-21ksoftirqd/123:32:401
81750,0rcu_preempt19-21ksoftirqd/122:50:471
81750,0rcu_preempt19-21ksoftirqd/121:45:551
81750,0rcu_preempt19-21ksoftirqd/100:17:411
81740,0rcu_preempt19-21ksoftirqd/122:16:431
81740,0rcu_preempt19-21ksoftirqd/100:24:131
81740,0rcu_preempt19-21ksoftirqd/100:24:131
81740,0rcu_preempt0-21swapper/123:48:361
81730,0rcu_preempt19-21ksoftirqd/123:59:121
81730,0rcu_preempt19-21ksoftirqd/123:12:291
81730,0rcu_preempt19-21ksoftirqd/100:39:031
81730,0rcu_preempt19-21ksoftirqd/100:00:151
127442730,0chrt9950irq/345-484840023:23:370
81720,0rcu_preempt19-21ksoftirqd/122:39:381
81720,0rcu_preempt19-21ksoftirqd/120:30:211
81720,0rcu_preempt19-21ksoftirqd/100:33:221
81710,0rcu_preempt19-21ksoftirqd/122:27:551
81710,0rcu_preempt19-21ksoftirqd/100:11:581
81710,0rcu_preempt0-21swapper/123:40:301
81710,0rcu_preempt0-21swapper/123:08:211
81710,0rcu_preempt0-21swapper/123:08:211
81700,0rcu_preempt6455-21kworker/1:121:27:271
81700,0rcu_preempt0-21swapper/122:57:011
81700,0rcu_preempt0-21swapper/122:30:331
81700,0rcu_preempt0-21swapper/122:20:371
81690,0rcu_preempt3-21ksoftirqd/022:33:570
81690,0rcu_preempt19-21ksoftirqd/121:23:251
81690,0rcu_preempt0-21swapper/123:22:561
81690,0rcu_preempt0-21swapper/121:35:471
81680,0rcu_preempt19-21ksoftirqd/121:15:471
81680,0rcu_preempt0-21swapper/123:51:561
81680,0rcu_preempt0-21swapper/122:36:461
81680,0rcu_preempt0-21swapper/100:04:341
81670,0rcu_preempt19-21ksoftirqd/123:28:111
81670,0rcu_preempt19-21ksoftirqd/120:54:421
81670,0rcu_preempt0-21swapper/123:15:461
81670,0rcu_preempt0-21swapper/122:10:241
81670,0rcu_preempt0-21swapper/121:53:101
81660,0rcu_preempt3-21ksoftirqd/021:37:150
81660,0rcu_preempt19-21ksoftirqd/122:59:431
81650,0rcu_preempt19-21ksoftirqd/119:59:471
81650,0rcu_preempt19-21ksoftirqd/119:59:471
81650,0rcu_preempt0-21swapper/122:06:441
81650,0rcu_preempt0-21swapper/122:01:521
81640,0rcu_preempt19-21ksoftirqd/121:29:441
81630,0rcu_preempt9925-1kworker/0:3H19:45:000
81630,0rcu_preempt0-21swapper/122:47:341
81630,0rcu_preempt0-21swapper/121:43:251
81620,0rcu_preempt6644-1kworker/0:2H19:39:510
183112620,0sleep010050irq/346-484840020:09:030
81610,0rcu_preempt3-21ksoftirqd/023:46:410
81610,0rcu_preempt3-21ksoftirqd/000:32:160
81610,0rcu_preempt19-21ksoftirqd/100:24:431
81600,0rcu_preempt3-21ksoftirqd/023:17:420
81600,0rcu_preempt19-21ksoftirqd/119:26:151
81600,0rcu_preempt19-21ksoftirqd/119:26:151
81590,0rcu_preempt3-21ksoftirqd/022:39:240
81590,0rcu_preempt19-21ksoftirqd/120:12:071
81580,0rcu_preempt3-21ksoftirqd/023:52:290
81580,0rcu_preempt3-21ksoftirqd/022:12:210
81580,0rcu_preempt3-21ksoftirqd/020:19:470
81580,0rcu_preempt3-21ksoftirqd/000:26:370
81580,0rcu_preempt3-21ksoftirqd/000:21:200
81580,0rcu_preempt3-21ksoftirqd/000:21:200
81580,0rcu_preempt3-21ksoftirqd/000:18:350
81580,0rcu_preempt3-21ksoftirqd/000:12:060
81580,0rcu_preempt19-21ksoftirqd/120:26:341
81580,0rcu_preempt19-21ksoftirqd/120:04:541
10050580,0irq/346-48484000-21swapper/021:40:460
81570,0rcu_preempt3-21ksoftirqd/023:02:250
81570,0rcu_preempt3-21ksoftirqd/021:59:340
81570,0rcu_preempt19-21ksoftirqd/120:15:211
81570,0rcu_preempt11968-21apt-get19:49:421
10050570,0irq/346-48484006400-1kworker/0:0H21:54:540
81560,0rcu_preempt3-21ksoftirqd/021:28:360
81560,0rcu_preempt3-21ksoftirqd/020:15:040
81560,0rcu_preempt3-21ksoftirqd/019:54:560
81560,0rcu_preempt19-21ksoftirqd/123:38:031
81560,0rcu_preempt19-21ksoftirqd/123:38:031
81560,0rcu_preempt19-21ksoftirqd/120:20:041
81550,0rcu_preempt3-21ksoftirqd/021:17:220
81550,0rcu_preempt19-21ksoftirqd/119:59:061
10050550,0irq/346-484840023591-21chrt21:31:170
10050550,0irq/346-484840013871-21if_can023:24:520
10050550,0irq/346-48484000-21swapper/022:24:490
81530,0rcu_preempt3-21ksoftirqd/023:39:100
81530,0rcu_preempt3-21ksoftirqd/023:39:100
248712530,0sleep010050irq/346-484840020:29:080
10050530,0irq/346-48484002258-21ssh21:45:300
10050530,0irq/346-48484000-21swapper/023:41:040
10050530,0irq/346-48484000-21swapper/022:20:020
10050530,0irq/346-48484000-21swapper/000:04:450
81520,0rcu_preempt19-21ksoftirqd/121:04:511
81520,0rcu_preempt19-21ksoftirqd/119:14:451
10050520,0irq/346-48484001369-21runrttasks22:58:590
81510,0rcu_preempt29266-21kworker/0:021:49:480
10250510,0irq/333-mmc03-21ksoftirqd/020:30:310
10050510,0irq/346-48484003659-1kworker/0:0H21:20:080
81500,0rcu_preempt3-21ksoftirqd/023:30:040
81500,0rcu_preempt3-21ksoftirqd/022:42:270
81500,0rcu_preempt30307-21ntp_states19:04:550
81500,0rcu_preempt19-21ksoftirqd/120:44:571
81500,0rcu_preempt19-21ksoftirqd/120:44:571
81500,0rcu_preempt19-21ksoftirqd/120:34:551
81500,0rcu_preempt0-21swapper/021:11:150
285862500,0sleep09950irq/345-484840020:39:480
81490,0rcu_preempt19-21ksoftirqd/120:39:451
81490,0rcu_preempt16638-21kworker/0:222:49:440
81480,0rcu_preempt3-21ksoftirqd/019:59:470
81480,0rcu_preempt3-21ksoftirqd/019:59:470
81480,0rcu_preempt19-21ksoftirqd/120:49:571
81480,0rcu_preempt19-21ksoftirqd/119:45:371
10050480,0irq/346-48484001239-21snmpd22:06:120
81470,0rcu_preempt32239-21kworker/0:223:55:070
81470,0rcu_preempt3-21ksoftirqd/022:14:490
81470,0rcu_preempt3-21ksoftirqd/020:44:420
81470,0rcu_preempt3-21ksoftirqd/020:44:420
81470,0rcu_preempt3-21ksoftirqd/020:09:470
81470,0rcu_preempt19-21ksoftirqd/119:19:341
81470,0rcu_preempt1808-21apt-get23:09:430
10050470,0irq/346-484840081rcu_preempt00:34:500
10050470,0irq/346-48484006644-1kworker/0:2H19:32:350
10050470,0irq/346-48484006181-1kworker/0:0H00:00:000
81460,0rcu_preempt3-21ksoftirqd/022:45:460
81460,0rcu_preempt29636-21apt-get19:04:431
81460,0rcu_preempt19-21ksoftirqd/120:59:591
81450,0rcu_preempt54-21kswapd019:11:251
81450,0rcu_preempt19-21ksoftirqd/119:40:411
9950440,0irq/345-48484000-21swapper/019:20:480
81440,0rcu_preempt3-21ksoftirqd/023:04:440
81440,0rcu_preempt3-21ksoftirqd/023:04:440
81430,0rcu_preempt3-21ksoftirqd/019:49:460
81430,0rcu_preempt3-21ksoftirqd/019:10:570
81430,0rcu_preempt19-21ksoftirqd/119:35:091
10050430,0irq/346-48484000-21swapper/020:54:300
81420,0rcu_preempt19-21ksoftirqd/119:29:421
81410,0rcu_preempt3-21ksoftirqd/019:24:450
81410,0rcu_preempt3-21ksoftirqd/019:24:450
81400,0rcu_preempt4154-21taskset21:04:410
81400,0rcu_preempt3-21ksoftirqd/020:54:480
81400,0rcu_preempt27842-1kworker/0:0H20:39:310
9950390,0irq/345-48484000-21swapper/020:59:440
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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