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2025-09-16 - 07:28

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 Tue Sep 16, 2025 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81990,0rcu_preempt19-21ksoftirqd/123:31:141
81990,0rcu_preempt19-21ksoftirqd/121:26:001
81980,0rcu_preempt19-21ksoftirqd/120:41:001
81970,0rcu_preempt19-21ksoftirqd/100:30:591
81960,0rcu_preempt753-21rngd22:52:441
81960,0rcu_preempt19-21ksoftirqd/123:25:561
81960,0rcu_preempt19-21ksoftirqd/123:25:561
81960,0rcu_preempt19-21ksoftirqd/122:31:091
81920,0rcu_preempt19-21ksoftirqd/123:20:561
81920,0rcu_preempt19-21ksoftirqd/100:06:131
81910,0rcu_preempt19-21ksoftirqd/100:19:231
81900,0rcu_preempt54-21kswapd021:11:511
81900,0rcu_preempt19-21ksoftirqd/119:31:131
81880,0rcu_preempt54-21kswapd022:18:221
81880,0rcu_preempt19-21ksoftirqd/123:19:551
81870,0rcu_preempt54-21kswapd023:49:011
81850,0rcu_preempt19-21ksoftirqd/122:48:021
81840,0rcu_preempt19-21ksoftirqd/119:51:061
81840,0rcu_preempt19-21ksoftirqd/100:26:081
81820,0rcu_preempt19-21ksoftirqd/122:00:421
81820,0rcu_preempt19-21ksoftirqd/119:40:581
81810,0rcu_preempt54-21kswapd021:21:571
81800,0rcu_preempt0-21swapper/122:39:301
81800,0rcu_preempt0-21swapper/122:39:301
81770,0rcu_preempt23492-21ping20:23:561
81770,0rcu_preempt19-21ksoftirqd/121:58:591
81750,0rcu_preempt54-21kswapd019:28:591
10050750,0irq/346-48484006402-1kworker/0:1H23:33:180
81740,0rcu_preempt19-21ksoftirqd/123:56:161
81740,0rcu_preempt19-21ksoftirqd/123:02:301
81740,0rcu_preempt19-21ksoftirqd/122:45:341
81740,0rcu_preempt19-21ksoftirqd/121:49:511
9950730,0irq/345-4848400171rcuc/121:41:091
81730,0rcu_preempt19-21ksoftirqd/122:27:161
81730,0rcu_preempt19-21ksoftirqd/121:06:381
81720,0rcu_preempt3-21ksoftirqd/023:56:080
81720,0rcu_preempt19-21ksoftirqd/122:56:101
81720,0rcu_preempt19-21ksoftirqd/120:53:481
81720,0rcu_preempt19-21ksoftirqd/120:06:091
81720,0rcu_preempt19-21ksoftirqd/120:05:291
81720,0rcu_preempt19-21ksoftirqd/120:00:221
81720,0rcu_preempt19-21ksoftirqd/120:00:221
81720,0rcu_preempt19-21ksoftirqd/100:11:091
10050720,0irq/346-48484005121-1kworker/0:0H22:15:540
81690,0rcu_preempt54-21kswapd022:39:080
81690,0rcu_preempt54-21kswapd022:39:080
81690,0rcu_preempt19-21ksoftirqd/123:42:211
81690,0rcu_preempt19-21ksoftirqd/120:45:571
81690,0rcu_preempt19-21ksoftirqd/120:11:341
81680,0rcu_preempt19-21ksoftirqd/123:50:531
81680,0rcu_preempt19-21ksoftirqd/119:36:041
81680,0rcu_preempt19-21ksoftirqd/119:36:041
10050680,0irq/346-48484003140-1kworker/0:1H22:52:490
10050680,0irq/346-484840029280-1kworker/0:3H22:45:180
81670,0rcu_preempt54-21kswapd021:19:401
81670,0rcu_preempt19-21ksoftirqd/120:19:591
81670,0rcu_preempt19-21ksoftirqd/100:00:581
81670,0rcu_preempt18128-21kworker/1:121:52:171
81670,0rcu_preempt1144-21ssh22:09:251
10050670,0irq/346-484840023978-1kworker/0:0H22:04:130
81660,0rcu_preempt19-21ksoftirqd/123:35:551
81650,0rcu_preempt3-21ksoftirqd/023:24:060
81640,0rcu_preempt3-21ksoftirqd/023:47:540
81630,0rcu_preempt54-21kswapd021:36:251
81630,0rcu_preempt19-21ksoftirqd/123:08:571
81620,0rcu_preempt19-21ksoftirqd/123:10:521
81610,0rcu_preempt9072-21ping19:20:331
81610,0rcu_preempt19-21ksoftirqd/122:11:091
81610,0rcu_preempt19-21ksoftirqd/120:26:481
81610,0rcu_preempt0-21swapper/122:22:131
81600,0rcu_preempt3-21ksoftirqd/022:47:150
81600,0rcu_preempt19-21ksoftirqd/120:56:031
81600,0rcu_preempt19-21ksoftirqd/100:21:331
81590,0rcu_preempt54-21kswapd000:27:450
81590,0rcu_preempt19-21ksoftirqd/121:33:211
81580,0rcu_preempt5776-21cyclictest19:10:541
81570,0rcu_preempt19-21ksoftirqd/120:36:051
81570,0rcu_preempt19-21ksoftirqd/119:21:171
81560,0rcu_preempt1361-21runrttasks21:01:031
81550,0rcu_preempt3-21ksoftirqd/021:13:310
81550,0rcu_preempt19-21ksoftirqd/119:06:331
10050540,0irq/346-48484007142-1kworker/0:3H22:30:130
10050530,0irq/346-484840024858-1kworker/0:2H21:21:540
10050530,0irq/346-484840010114-1kworker/0:1H22:20:440
81510,0rcu_preempt18128-21kworker/1:119:46:161
10050510,0irq/346-4848400753-21rngd21:16:040
10050510,0irq/346-48484002083-21cat21:31:090
10050510,0irq/346-484840017810-1kworker/0:2H23:09:480
10050500,0irq/346-4848400753-21rngd22:14:000
81490,0rcu_preempt3-21ksoftirqd/020:06:060
81490,0rcu_preempt2482-21kworker/0:222:56:000
81490,0rcu_preempt19-21ksoftirqd/120:31:011
81480,0rcu_preempt4271-21apt-get19:00:540
81480,0rcu_preempt3-21ksoftirqd/020:20:420
10050480,0irq/346-484840054-21kswapd021:41:010
10050480,0irq/346-48484004762-21ssh00:10:540
10050480,0irq/346-484840012696-21ssh23:01:120
10050470,0irq/346-484840012898-21apt-get23:40:530
81460,0rcu_preempt3-21ksoftirqd/020:25:430
10050460,0irq/346-484840030408-1kworker/0:3H23:27:280
10050460,0irq/346-484840030408-1kworker/0:3H23:27:280
10050460,0irq/346-484840023226-1kworker/0:0H23:15:470
10050460,0irq/346-484840017700-1kworker/0:1H21:54:310
10050460,0irq/346-48484000-21swapper/000:31:000
81450,0rcu_preempt3-21ksoftirqd/000:06:070
10050450,0irq/346-48484007142-1kworker/0:3H22:31:490
10050450,0irq/346-484840054-21kswapd021:26:010
10050450,0irq/346-484840023934-21ssh23:15:420
10050450,0irq/346-484840016266-21taskset21:48:230
10050450,0irq/346-48484000-21swapper/023:52:460
9950440,0irq/345-48484009072-21ping19:15:420
10050440,0irq/346-484840027695-1kworker/0:0H00:01:010
10050440,0irq/346-484840023978-1kworker/0:0H21:57:190
81430,0rcu_preempt7361-21sh21:37:360
81430,0rcu_preempt27003-21kworker/0:020:11:080
81430,0rcu_preempt0-21swapper/022:07:010
10050430,0irq/346-48484008859-21munin-node0
10050430,0irq/346-484840030083-21192.168.115.60-20:17:010
10050430,0irq/346-484840014296-21ssh00:23:560
10050430,0irq/346-484840013690-21dropbear19:27:350
10050430,0irq/346-48484000-21swapper/021:05:590
81420,0rcu_preempt6410-21apt-get20:45:580
81410,0rcu_preempt19-21ksoftirqd/119:04:041
10050410,0irq/346-48484004256-1kworker/0:0H20:42:050
81400,0rcu_preempt3-21ksoftirqd/020:00:430
81400,0rcu_preempt3-21ksoftirqd/020:00:430
81390,0rcu_preempt8699-21munin-node0
81390,0rcu_preempt3-21ksoftirqd/021:00:540
81390,0rcu_preempt3-21ksoftirqd/019:50:550
5777993912,0cyclictest0-21swapper/019:46:430
5777993912,0cyclictest0-21swapper/019:40:000
5777993912,0cyclictest0-21swapper/019:40:000
13250390,0irq/301-48020009908-21sh20:55:590
10050390,0irq/346-48484007888-1kworker/0:2H20:51:070
10050390,0irq/346-484840025166-21taskset20:02:120
81380,0rcu_preempt3-21ksoftirqd/020:31:090
81380,0rcu_preempt3-21ksoftirqd/019:07:500
577799383,0cyclictest923-21nfsv4.0-svc19:45:410
81370,0rcu_preempt3-21ksoftirqd/020:35:590
81370,0rcu_preempt3-21ksoftirqd/019:30:560
5777993711,0cyclictest0-21swapper/019:18:290
81350,0rcu_preempt3-21ksoftirqd/019:20:420
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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