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2026-04-17 - 09:09

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 Apr 17, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81940,0rcu_preempt19-21ksoftirqd/121:41:491
81870,0rcu_preempt0-21swapper/100:03:451
81780,0rcu_preempt3-21ksoftirqd/023:56:400
81780,0rcu_preempt3-21ksoftirqd/023:56:400
81770,0rcu_preempt19-21ksoftirqd/122:38:551
10050770,0irq/346-4848400111rcuc/021:12:410
81760,0rcu_preempt9417-1kworker/0:0H23:21:430
10050760,0irq/346-484840054-21kswapd000:25:160
81750,0rcu_preempt3-21ksoftirqd/023:12:160
81740,0rcu_preempt3-21ksoftirqd/022:45:390
81740,0rcu_preempt19-21ksoftirqd/123:55:481
81740,0rcu_preempt19-21ksoftirqd/123:55:481
81730,0rcu_preempt3-21ksoftirqd/023:45:470
81730,0rcu_preempt3-21ksoftirqd/022:15:260
81730,0rcu_preempt3-21ksoftirqd/021:20:530
81730,0rcu_preempt3-21ksoftirqd/000:34:520
81720,0rcu_preempt3-21ksoftirqd/022:02:400
81720,0rcu_preempt3-21ksoftirqd/021:50:530
81720,0rcu_preempt19-21ksoftirqd/122:05:341
81710,0rcu_preempt3-21ksoftirqd/000:01:010
81710,0rcu_preempt19-21ksoftirqd/121:18:531
81700,0rcu_preempt19-21ksoftirqd/122:02:081
81690,0rcu_preempt3-21ksoftirqd/023:18:170
81690,0rcu_preempt3-21ksoftirqd/022:22:510
81680,0rcu_preempt54-21kswapd022:32:581
81680,0rcu_preempt19-21ksoftirqd/122:27:001
81680,0rcu_preempt0-21swapper/122:11:431
81670,0rcu_preempt19-21ksoftirqd/121:52:391
81670,0rcu_preempt19-21ksoftirqd/100:13:531
10050670,0irq/346-484840054-21kswapd000:25:381
81660,0rcu_preempt19-21ksoftirqd/123:25:071
13250660,0irq/301-480200017039-21ssh23:28:420
81650,0rcu_preempt3-21ksoftirqd/000:33:220
81650,0rcu_preempt3-21ksoftirqd/000:04:400
81650,0rcu_preempt19-21ksoftirqd/122:52:421
10050650,0irq/346-48484000-21swapper/021:38:530
81640,0rcu_preempt19-21ksoftirqd/123:28:541
81640,0rcu_preempt0-21swapper/121:10:101
81630,0rcu_preempt54-21kswapd000:12:251
81630,0rcu_preempt19-21ksoftirqd/121:46:161
81630,0rcu_preempt19-21ksoftirqd/119:33:591
10050630,0irq/346-48484009416-1kworker/1:2H23:20:591
10050620,0irq/346-484840031942-1kworker/1:3H23:11:131
10050620,0irq/346-48484000-21swapper/023:43:280
81610,0rcu_preempt851-21rngd21:03:521
81610,0rcu_preempt19-21ksoftirqd/123:37:411
81610,0rcu_preempt19-21ksoftirqd/123:37:411
10050610,0irq/346-484840027029-1kworker/1:2H23:06:591
81600,0rcu_preempt20075-1kworker/0:1H22:28:220
81600,0rcu_preempt19-21ksoftirqd/121:15:401
81590,0rcu_preempt3-21ksoftirqd/022:03:570
81590,0rcu_preempt19-21ksoftirqd/120:48:471
81590,0rcu_preempt19-21ksoftirqd/100:28:311
10050590,0irq/346-484840029927-1kworker/1:0H22:37:091
81580,0rcu_preempt3-21ksoftirqd/020:01:380
81580,0rcu_preempt21278-21ssh21:53:491
10050580,0irq/346-48484006440-1kworker/1:2H23:52:351
10050570,0irq/346-484840024140-1kworker/1:0H23:40:231
81560,0rcu_preempt54-21kswapd020:18:521
81560,0rcu_preempt13353-21ssh21:45:330
10050560,0irq/346-48484005329-1kworker/1:1H22:14:091
81550,0rcu_preempt3-21ksoftirqd/023:03:180
81550,0rcu_preempt3-21ksoftirqd/023:03:180
81550,0rcu_preempt3-21ksoftirqd/022:08:520
10050550,0irq/346-484840054-21kswapd022:45:361
10050550,0irq/346-484840030981-1kworker/1:1H00:19:391
10050550,0irq/346-484840017210-1kworker/1:1H22:59:211
10050550,0irq/346-484840017210-1kworker/1:1H22:59:211
10050550,0irq/346-484840017210-1kworker/1:1H22:57:011
81540,0rcu_preempt3-21ksoftirqd/021:58:220
81540,0rcu_preempt3-21ksoftirqd/020:43:530
81540,0rcu_preempt19-21ksoftirqd/119:28:041
10050540,0irq/346-484840054-21kswapd023:59:131
10050540,0irq/346-484840030754-1kworker/1:2H21:34:231
10050540,0irq/346-484840025810-1kworker/1:0H21:29:141
81530,0rcu_preempt6439-21kworker/0:000:10:440
10050530,0irq/346-4848400851-21rngd23:03:530
10050530,0irq/346-4848400808-21munin-node0
10050530,0irq/346-484840054-21kswapd022:32:420
10050530,0irq/346-484840054-21kswapd000:21:190
10050530,0irq/346-484840031942-1kworker/1:3H23:14:271
10050530,0irq/346-484840015184-1kworker/1:1H22:23:241
10050530,0irq/346-484840013321-1kworker/1:0H00:35:041
81520,0rcu_preempt3-21ksoftirqd/023:28:030
81520,0rcu_preempt19-21ksoftirqd/120:53:461
81520,0rcu_preempt13341-21kworker/0:100:17:520
81520,0rcu_preempt10708-21kworker/0:221:30:140
81520,0rcu_preempt10708-21kworker/0:221:17:100
10050520,0irq/346-484840029051-1kworker/1:2H23:44:551
81510,0rcu_preempt3-21ksoftirqd/022:35:090
81510,0rcu_preempt17777-21ping20:18:540
81500,0rcu_preempt3-21ksoftirqd/020:23:530
81500,0rcu_preempt3-21ksoftirqd/020:09:080
81500,0rcu_preempt19-21ksoftirqd/120:13:441
10050500,0irq/346-48484008308-1kworker/1:2H21:24:231
9950490,0irq/345-484840015325-21if_eth022:53:490
81490,0rcu_preempt54-21kswapd023:51:300
81490,0rcu_preempt54-21kswapd020:03:571
81490,0rcu_preempt3-21ksoftirqd/020:14:140
81490,0rcu_preempt19-21ksoftirqd/119:58:301
10050490,0irq/346-48484001623-21cyclictest23:37:190
10050490,0irq/346-48484001623-21cyclictest23:37:190
81480,0rcu_preempt3-21ksoftirqd/021:23:510
81480,0rcu_preempt3-21ksoftirqd/020:29:540
81480,0rcu_preempt3-21ksoftirqd/019:56:510
81480,0rcu_preempt19-21ksoftirqd/120:33:501
81480,0rcu_preempt19-21ksoftirqd/119:31:521
81480,0rcu_preempt1623-21cyclictest20:43:451
81470,0rcu_preempt31334-21apt-get20:38:390
81470,0rcu_preempt19-21ksoftirqd/120:23:561
81470,0rcu_preempt19-21ksoftirqd/120:08:551
81470,0rcu_preempt19-21ksoftirqd/119:44:541
81470,0rcu_preempt19-21ksoftirqd/119:22:431
10050470,0irq/346-48484002401-21ssh22:40:200
81460,0rcu_preempt3-21ksoftirqd/022:51:540
81460,0rcu_preempt3-21ksoftirqd/021:03:520
81460,0rcu_preempt3-21ksoftirqd/019:08:460
81460,0rcu_preempt19-21ksoftirqd/119:39:021
10050460,0irq/346-48484000-21swapper/021:37:210
81450,0rcu_preempt3-21ksoftirqd/020:59:530
81450,0rcu_preempt3-21ksoftirqd/020:59:530
81450,0rcu_preempt3-21ksoftirqd/019:48:460
81450,0rcu_preempt17777-21ping20:04:230
10050450,0irq/346-48484000-21swapper/019:18:280
81440,0rcu_preempt19-21ksoftirqd/120:38:461
9950430,0irq/345-48484006252-21seq19:20:180
81430,0rcu_preempt19-21ksoftirqd/120:29:551
81430,0rcu_preempt19-21ksoftirqd/119:53:441
81430,0rcu_preempt19-21ksoftirqd/119:03:451
1599430,0migration/013722-21if_eth219:43:550
81420,0rcu_preempt3-21ksoftirqd/020:53:410
10050420,0irq/346-48484001734-1kworker/0:3H20:48:490
81410,0rcu_preempt19-21ksoftirqd/119:13:471
81400,0rcu_preempt5679-21dropbear20:58:391
81400,0rcu_preempt5679-21dropbear20:58:391
81400,0rcu_preempt4909-21ping19:39:000
81400,0rcu_preempt3-21ksoftirqd/020:33:550
81400,0rcu_preempt19-21ksoftirqd/119:49:381
81400,0rcu_preempt19-21ksoftirqd/119:08:541
81390,0rcu_preempt3-21ksoftirqd/019:23:530
81380,0rcu_preempt7866-21kworker/0:219:28:400
81370,0rcu_preempt9665-21kworker/0:019:33:400
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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