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2025-11-27 - 14:52

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 Thu Nov 27, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81920,0rcu_preempt751-21rngd22:59:391
81910,0rcu_preempt19-21ksoftirqd/119:39:301
81820,0rcu_preempt54-21kswapd000:31:421
10050810,0irq/346-4848400111rcuc/021:57:080
81750,0rcu_preempt27203-21cyclictest22:00:001
81740,0rcu_preempt19-21ksoftirqd/121:10:441
10050740,0irq/346-4848400111rcuc/022:25:150
293222730,0chrt9950irq/345-484840023:03:260
81720,0rcu_preempt19-21ksoftirqd/122:47:301
81720,0rcu_preempt19-21ksoftirqd/121:53:141
81710,0rcu_preempt3-21ksoftirqd/023:33:170
81710,0rcu_preempt30165-21ssh23:04:381
81710,0rcu_preempt19-21ksoftirqd/121:44:511
81710,0rcu_preempt19-21ksoftirqd/119:24:471
10050710,0irq/346-484840041ktimersoftd/022:14:210
10050710,0irq/346-484840041ktimersoftd/021:16:570
81700,0rcu_preempt19-21ksoftirqd/122:13:261
81690,0rcu_preempt19-21ksoftirqd/121:17:011
125282690,0sleep010050irq/346-484840020:01:400
125282690,0sleep010050irq/346-484840020:01:400
81680,0rcu_preempt19-21ksoftirqd/123:24:181
81680,0rcu_preempt19-21ksoftirqd/123:24:181
81680,0rcu_preempt19-21ksoftirqd/100:28:291
10050680,0irq/346-484840041ktimersoftd/000:03:190
81670,0rcu_preempt19-21ksoftirqd/122:14:471
81670,0rcu_preempt19-21ksoftirqd/122:06:311
81670,0rcu_preempt19-21ksoftirqd/121:59:101
81670,0rcu_preempt19-21ksoftirqd/120:09:471
81670,0rcu_preempt19-21ksoftirqd/120:08:411
81670,0rcu_preempt19-21ksoftirqd/100:22:461
10050670,0irq/346-484840041ktimersoftd/022:43:310
10050670,0irq/346-484840041ktimersoftd/020:39:340
81660,0rcu_preempt54-21kswapd023:57:301
81660,0rcu_preempt3-21ksoftirqd/022:55:070
81660,0rcu_preempt3-21ksoftirqd/022:55:070
81660,0rcu_preempt3-21ksoftirqd/021:45:080
81660,0rcu_preempt19-21ksoftirqd/122:49:321
81650,0rcu_preempt19-21ksoftirqd/122:43:461
81650,0rcu_preempt19-21ksoftirqd/121:25:461
2720499658,0cyclictest2141-1ssh23:09:470
10050650,0irq/346-4848400111rcuc/022:16:210
81640,0rcu_preempt19-21ksoftirqd/123:45:401
81640,0rcu_preempt19-21ksoftirqd/123:35:291
81640,0rcu_preempt19-21ksoftirqd/122:27:431
81640,0rcu_preempt19-21ksoftirqd/121:30:301
81640,0rcu_preempt19-21ksoftirqd/100:13:071
27204996410,0cyclictest0-21swapper/022:19:480
144112640,0sleep010050irq/346-484840020:09:260
81630,0rcu_preempt2662-1kworker/0:1H19:32:240
81630,0rcu_preempt19-21ksoftirqd/123:29:461
6112630,0sleep010050irq/346-484840019:25:050
2720499639,0cyclictest19967-21taskset22:51:270
81620,0rcu_preempt19-21ksoftirqd/123:15:261
81620,0rcu_preempt19-21ksoftirqd/121:35:461
81620,0rcu_preempt19-21ksoftirqd/100:36:191
81610,0rcu_preempt19-21ksoftirqd/122:35:381
81610,0rcu_preempt19-21ksoftirqd/122:35:381
81610,0rcu_preempt19-21ksoftirqd/100:16:381
81610,0rcu_preempt19-21ksoftirqd/100:03:251
2720499611,0cyclictest30644-21sh23:44:420
81600,0rcu_preempt3-21ksoftirqd/021:39:400
81600,0rcu_preempt19-21ksoftirqd/121:23:101
27204996011,0cyclictest7808-1kworker/0:0H23:04:520
2720499598,0cyclictest0-21swapper/021:24:310
2720499597,0cyclictest31754-1kworker/0:1H21:09:530
2720499597,0cyclictest0-21swapper/023:49:470
2720499592,0cyclictest0-21swapper/000:09:040
2720499592,0cyclictest0-21swapper/000:09:040
81580,0rcu_preempt19-21ksoftirqd/122:31:301
2720499586,0cyclictest42750kworker/0:1H23:54:510
2720499582,0cyclictest0-21swapper/022:04:530
2720499581,0cyclictest0-21swapper/021:52:390
27204995810,0cyclictest2662-1kworker/0:1H19:35:030
27204995810,0cyclictest0-21swapper/023:26:140
81570,0rcu_preempt3-21ksoftirqd/022:29:440
81570,0rcu_preempt19-21ksoftirqd/120:19:401
2720499572,0cyclictest5939-1kworker/0:0H19:44:520
2720499572,0cyclictest30472-21ping19:19:450
2720499572,0cyclictest0-21swapper/023:37:270
2720499572,0cyclictest0-21swapper/022:34:520
2720499572,0cyclictest0-21swapper/022:34:520
2720499572,0cyclictest0-21swapper/000:14:290
27204995711,0cyclictest0-21swapper/019:49:540
27204995711,0cyclictest0-21swapper/019:49:540
81560,0rcu_preempt54-21kswapd000:34:420
81560,0rcu_preempt3-21ksoftirqd/000:24:430
81560,0rcu_preempt19-21ksoftirqd/123:26:021
2720499562,0cyclictest0-21swapper/019:39:530
2720499561,0cyclictest0-21swapper/000:30:270
81550,0rcu_preempt3-21ksoftirqd/021:59:440
2720499551,0cyclictest0-21swapper/000:17:240
10050550,0irq/346-48484000-21swapper/022:46:020
10050550,0irq/346-48484000-21swapper/021:27:140
81540,0rcu_preempt3-21ksoftirqd/023:39:470
81540,0rcu_preempt19-21ksoftirqd/121:41:421
81540,0rcu_preempt19-21ksoftirqd/100:05:031
81540,0rcu_preempt19-21ksoftirqd/100:05:031
27204995414,0cyclictest0-21swapper/019:54:580
2720499541,0cyclictest28469-1kworker/0:3H20:59:330
10050540,0irq/346-484840054-21kswapd023:22:140
10050540,0irq/346-484840054-21kswapd023:22:140
81530,0rcu_preempt3-21ksoftirqd/019:09:500
81530,0rcu_preempt3-21ksoftirqd/000:19:490
2720499532,0cyclictest0-21swapper/023:16:410
10050530,0irq/346-484840028324-1kworker/1:3H23:11:411
81520,0rcu_preempt19-21ksoftirqd/119:39:571
81520,0rcu_preempt19-21ksoftirqd/119:20:571
10050520,0irq/346-4848400751-21rngd21:32:300
81510,0rcu_preempt19-21ksoftirqd/120:44:431
2720499511,0cyclictest0-21swapper/020:19:310
10050510,0irq/346-484840019-21ksoftirqd/120:54:551
81500,0rcu_preempt3-21ksoftirqd/020:29:450
81500,0rcu_preempt19-21ksoftirqd/119:09:431
81500,0rcu_preempt0-21swapper/123:42:171
2720499502,0cyclictest0-21swapper/019:19:310
10050500,0irq/346-484840022555-21ssh22:54:521
10050500,0irq/346-484840022555-21ssh22:54:521
2720499492,0cyclictest0-21swapper/020:21:530
10050490,0irq/346-484840027129-1kworker/1:3H22:23:001
81480,0rcu_preempt19-21ksoftirqd/120:14:441
81470,0rcu_preempt3-21ksoftirqd/021:38:550
81470,0rcu_preempt3-21ksoftirqd/021:04:560
81470,0rcu_preempt19-21ksoftirqd/120:03:011
81470,0rcu_preempt19-21ksoftirqd/120:03:011
81470,0rcu_preempt19-21ksoftirqd/119:52:211
81470,0rcu_preempt19-21ksoftirqd/119:52:211
81470,0rcu_preempt14380-21kworker/0:120:12:060
81460,0rcu_preempt54-21kswapd020:59:551
81460,0rcu_preempt19-21ksoftirqd/121:04:491
81460,0rcu_preempt19-21ksoftirqd/120:26:011
81460,0rcu_preempt19-21ksoftirqd/119:29:431
81450,0rcu_preempt27275-21apt-get20:54:400
81450,0rcu_preempt2307-21apt-get23:49:441
10050440,0irq/346-484840023138-1kworker/0:2H19:04:530
81430,0rcu_preempt3-21ksoftirqd/020:49:470
81430,0rcu_preempt19-21ksoftirqd/119:59:091
81430,0rcu_preempt19-21ksoftirqd/119:19:301
81420,0rcu_preempt19-21ksoftirqd/119:44:441
81410,0rcu_preempt3-21ksoftirqd/020:44:470
81410,0rcu_preempt3-21ksoftirqd/020:25:140
81400,0rcu_preempt26277-21meminfo19:04:501
81400,0rcu_preempt19-21ksoftirqd/120:39:401
81390,0rcu_preempt3-21ksoftirqd/020:37:180
81390,0rcu_preempt19-21ksoftirqd/120:39:301
81380,0rcu_preempt19-21ksoftirqd/120:49:421
81360,0rcu_preempt19-21ksoftirqd/120:33:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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