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2026-09-07 - 12:46

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 376 highest latencies:
System rackaslot5s.osadl.org (updated Mon Sep 07, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811280,0rcu_preempt19-21ksoftirqd/123:58:431
811160,0rcu_preempt19-21ksoftirqd/123:03:231
811160,0rcu_preempt19-21ksoftirqd/123:03:231
811090,0rcu_preempt19-21ksoftirqd/123:24:501
811030,0rcu_preempt19-21ksoftirqd/122:19:411
811000,0rcu_preempt19-21ksoftirqd/100:22:051
10050750,0irq/346-484840041ktimersoftd/023:41:530
10050740,0irq/346-484840054-21kswapd021:30:190
10050730,0irq/346-4848400111rcuc/022:27:100
81720,0rcu_preempt19-21ksoftirqd/119:34:241
81710,0rcu_preempt836-21rngd00:39:091
81700,0rcu_preempt3-21ksoftirqd/021:29:080
81670,0rcu_preempt3-21ksoftirqd/022:09:240
1867799671,0cyclictest15907-21latency_hist20:39:240
81660,0rcu_preempt3-21ksoftirqd/000:04:380
81660,0rcu_preempt19-21ksoftirqd/121:30:551
81650,0rcu_preempt836-21rngd21:34:531
81650,0rcu_preempt19-21ksoftirqd/122:11:531
81650,0rcu_preempt19-21ksoftirqd/122:11:531
10050650,0irq/346-484840054-21kswapd000:21:560
10050650,0irq/346-484840017016-1kworker/0:2H23:10:550
81640,0rcu_preempt19-21ksoftirqd/122:55:191
81630,0rcu_preempt19-21ksoftirqd/122:30:141
10050630,0irq/346-4848400688-21php-cgi00:33:120
81620,0rcu_preempt3-21ksoftirqd/022:54:540
81620,0rcu_preempt22810-21ssh22:44:371
81620,0rcu_preempt19-21ksoftirqd/100:14:491
81610,0rcu_preempt19-21ksoftirqd/121:29:061
1867799613,0cyclictest0-21swapper/023:20:070
10050610,0irq/346-484840054-21kswapd023:37:331
10050610,0irq/346-484840054-21kswapd023:37:331
10050610,0irq/346-484840054-21kswapd022:27:351
81600,0rcu_preempt19-21ksoftirqd/123:16:211
81600,0rcu_preempt19-21ksoftirqd/123:16:211
81600,0rcu_preempt19-21ksoftirqd/122:17:191
81600,0rcu_preempt19-21ksoftirqd/121:18:191
10050600,0irq/346-484840054-21kswapd022:18:420
81590,0rcu_preempt5782-21kworker/0:021:23:300
81590,0rcu_preempt19-21ksoftirqd/123:53:271
81590,0rcu_preempt19-21ksoftirqd/123:46:251
81590,0rcu_preempt19-21ksoftirqd/122:37:141
81590,0rcu_preempt19-21ksoftirqd/121:41:561
10050590,0irq/346-484840054-21kswapd021:21:321
10050590,0irq/346-484840024472-1kworker/0:0H00:25:110
10050590,0irq/346-48484000-21swapper/020:39:230
81580,0rcu_preempt3-21ksoftirqd/019:59:400
1867799582,0cyclictest0-21swapper/000:11:100
18677995811,0cyclictest29145-21munin-node0
81570,0rcu_preempt3-21ksoftirqd/022:49:140
81570,0rcu_preempt19-21ksoftirqd/123:08:241
81570,0rcu_preempt19-21ksoftirqd/121:53:171
81570,0rcu_preempt19-21ksoftirqd/100:07:221
18677995711,0cyclictest0-21swapper/019:45:300
10050570,0irq/346-484840015508-1kworker/0:0H22:39:190
81560,0rcu_preempt19-21ksoftirqd/100:11:351
10050560,0irq/346-484840054-21kswapd022:04:001
81550,0rcu_preempt3-21ksoftirqd/021:01:030
10050550,0irq/346-48484004092-1kworker/0:1H00:36:250
10050550,0irq/346-484840029950-1kworker/0:1H21:48:060
10050550,0irq/346-484840029950-1kworker/0:1H21:48:060
10050550,0irq/346-484840010478-1kworker/0:3H22:00:050
10050550,0irq/346-48484001020-1kworker/0:0H21:18:570
10050550,0irq/346-48484000-21swapper/022:59:270
10050550,0irq/346-48484000-21swapper/022:59:270
81540,0rcu_preempt679-21kworker/0:121:56:020
81540,0rcu_preempt19-21ksoftirqd/120:09:341
81540,0rcu_preempt19-21ksoftirqd/119:59:361
1867799548,0cyclictest1803750kworker/0:1H23:47:040
1867799542,0cyclictest0-21swapper/019:24:240
1867799541,0cyclictest24015-21munin-node0
1867799541,0cyclictest0-21swapper/019:19:240
10050540,0irq/346-484840054-21kswapd023:59:290
10050530,0irq/346-484840054-21kswapd000:30:431
10050530,0irq/346-484840018037-1kworker/0:1H23:54:340
81520,0rcu_preempt19-21ksoftirqd/123:29:531
81520,0rcu_preempt19-21ksoftirqd/123:21:481
81510,0rcu_preempt7901-21ssh22:29:360
81510,0rcu_preempt3-21ksoftirqd/022:10:120
81510,0rcu_preempt3-21ksoftirqd/022:10:120
81510,0rcu_preempt19-21ksoftirqd/119:21:321
81510,0rcu_preempt17600-21apt-get20:44:350
10050510,0irq/346-484840054-21kswapd023:40:291
10050510,0irq/346-484840054-21kswapd000:27:261
10050510,0irq/346-48484004445-1kworker/0:0H23:33:060
10050510,0irq/346-484840021109-21ssh22:42:391
81500,0rcu_preempt3-21ksoftirqd/023:34:550
81500,0rcu_preempt3-21ksoftirqd/023:34:550
81500,0rcu_preempt3-21ksoftirqd/020:32:390
81500,0rcu_preempt3-21ksoftirqd/020:05:140
81500,0rcu_preempt3-21ksoftirqd/019:59:230
81500,0rcu_preempt18822-21munin-node0
10050500,0irq/346-484840054-21kswapd021:47:121
10050500,0irq/346-484840054-21kswapd021:47:121
10050500,0irq/346-484840054-21kswapd000:18:160
10050500,0irq/346-484840010553-1kworker/1:0H22:50:121
81490,0rcu_preempt54-21kswapd023:09:521
81490,0rcu_preempt3-21ksoftirqd/020:10:430
81490,0rcu_preempt19-21ksoftirqd/121:56:461
81490,0rcu_preempt19-21ksoftirqd/120:24:371
81490,0rcu_preempt19-21ksoftirqd/120:05:481
81490,0rcu_preempt19-21ksoftirqd/119:58:031
10050490,0irq/346-484840054-21kswapd021:39:320
81480,0rcu_preempt3-21ksoftirqd/023:16:290
81480,0rcu_preempt3-21ksoftirqd/023:16:290
81480,0rcu_preempt19-21ksoftirqd/120:39:361
81480,0rcu_preempt19-21ksoftirqd/119:41:571
81480,0rcu_preempt19-21ksoftirqd/119:36:061
81480,0rcu_preempt18676-21cyclictest21:09:371
81480,0rcu_preempt18676-21cyclictest20:54:380
10050480,0irq/346-484840054-21kswapd023:24:500
10050480,0irq/346-484840054-21kswapd023:06:590
10050480,0irq/346-484840030374-1kworker/0:0H22:53:320
10050480,0irq/346-484840020044-1kworker/0:1H21:38:330
10050480,0irq/346-48484000-21swapper/021:11:210
81470,0rcu_preempt3-21ksoftirqd/022:44:030
81470,0rcu_preempt19-21ksoftirqd/122:05:291
81470,0rcu_preempt19-21ksoftirqd/120:19:261
10050470,0irq/346-484840025654-21diskmemload21:52:070
10050470,0irq/346-48484000-21swapper/022:20:120
81460,0rcu_preempt3-21ksoftirqd/021:07:080
81460,0rcu_preempt3-21ksoftirqd/020:24:350
81460,0rcu_preempt19-21ksoftirqd/120:54:471
81460,0rcu_preempt19-21ksoftirqd/119:44:301
81460,0rcu_preempt19-21ksoftirqd/119:25:351
81460,0rcu_preempt1873-21kworker/1:019:14:511
10050460,0irq/346-48484003089-21ssh00:02:441
10050460,0irq/346-484840018037-1kworker/0:1H23:52:380
10050460,0irq/346-484840017171-21munin-node0
81450,0rcu_preempt9378-21kworker/1:120:35:301
81450,0rcu_preempt3-21ksoftirqd/020:19:520
81450,0rcu_preempt3-21ksoftirqd/020:15:180
81450,0rcu_preempt3-21ksoftirqd/019:49:390
81450,0rcu_preempt19-21ksoftirqd/120:49:411
81450,0rcu_preempt19-21ksoftirqd/120:17:131
81450,0rcu_preempt19-21ksoftirqd/119:09:341
81430,0rcu_preempt27567-21munin-node0
81420,0rcu_preempt3-21ksoftirqd/020:53:520
81420,0rcu_preempt19-21ksoftirqd/120:59:431
81420,0rcu_preempt19-21ksoftirqd/119:51:301
81420,0rcu_preempt18738-21latency_hist19:09:241
81400,0rcu_preempt19-21ksoftirqd/120:44:511
81400,0rcu_preempt19-21ksoftirqd/120:29:461
81390,0rcu_preempt19-21ksoftirqd/121:08:301
1867799372,0cyclictest0-21swapper/019:30:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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