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2026-06-25 - 23:05

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 Jun 25, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81900,0rcu_preempt19-21ksoftirqd/111:07:341
81870,0rcu_preempt19-21ksoftirqd/112:29:471
81860,0rcu_preempt25672-21diskmemload10:20:461
81830,0rcu_preempt21996-21kworker/1:011:33:281
81830,0rcu_preempt19-21ksoftirqd/108:16:521
81820,0rcu_preempt19-21ksoftirqd/107:23:551
81810,0rcu_preempt19-21ksoftirqd/111:30:591
81810,0rcu_preempt19-21ksoftirqd/111:02:361
81810,0rcu_preempt19-21ksoftirqd/107:58:041
81810,0rcu_preempt19-21ksoftirqd/107:55:531
81800,0rcu_preempt21966-21ping07:42:511
81800,0rcu_preempt19-21ksoftirqd/109:51:471
81800,0rcu_preempt19-21ksoftirqd/107:35:001
81800,0rcu_preempt19-21ksoftirqd/107:18:291
81800,0rcu_preempt1470-21runrttasks09:19:391
81780,0rcu_preempt19-21ksoftirqd/111:38:021
81780,0rcu_preempt19-21ksoftirqd/110:44:101
81780,0rcu_preempt19-21ksoftirqd/110:29:571
81780,0rcu_preempt19-21ksoftirqd/110:26:561
81780,0rcu_preempt19-21ksoftirqd/109:15:551
81780,0rcu_preempt19-21ksoftirqd/109:07:311
81770,0rcu_preempt19-21ksoftirqd/112:05:151
81770,0rcu_preempt19-21ksoftirqd/111:53:041
81770,0rcu_preempt19-21ksoftirqd/111:17:321
81770,0rcu_preempt19-21ksoftirqd/110:59:111
81770,0rcu_preempt19-21ksoftirqd/110:36:231
81770,0rcu_preempt19-21ksoftirqd/110:10:241
81770,0rcu_preempt19-21ksoftirqd/108:25:211
81770,0rcu_preempt19-21ksoftirqd/108:02:491
81760,0rcu_preempt25672-21diskmemload12:16:061
81760,0rcu_preempt19-21ksoftirqd/112:01:571
81760,0rcu_preempt19-21ksoftirqd/111:45:111
81760,0rcu_preempt19-21ksoftirqd/111:14:191
81760,0rcu_preempt19-21ksoftirqd/110:53:431
81760,0rcu_preempt19-21ksoftirqd/110:49:541
81760,0rcu_preempt19-21ksoftirqd/110:00:161
81760,0rcu_preempt19-21ksoftirqd/109:39:071
81760,0rcu_preempt19-21ksoftirqd/108:32:391
81760,0rcu_preempt19-21ksoftirqd/107:31:011
81760,0rcu_preempt0-21swapper/111:47:321
81750,0rcu_preempt19-21ksoftirqd/112:35:191
81750,0rcu_preempt19-21ksoftirqd/112:23:141
81750,0rcu_preempt19-21ksoftirqd/112:12:101
81750,0rcu_preempt19-21ksoftirqd/110:04:331
81750,0rcu_preempt19-21ksoftirqd/109:45:011
81750,0rcu_preempt19-21ksoftirqd/109:31:371
81750,0rcu_preempt19-21ksoftirqd/108:51:531
81750,0rcu_preempt19-21ksoftirqd/108:09:111
81740,0rcu_preempt19-21ksoftirqd/111:22:491
81740,0rcu_preempt19-21ksoftirqd/111:22:491
81740,0rcu_preempt19-21ksoftirqd/110:40:351
81740,0rcu_preempt19-21ksoftirqd/110:12:291
81740,0rcu_preempt19-21ksoftirqd/109:37:211
81740,0rcu_preempt19-21ksoftirqd/107:39:171
81740,0rcu_preempt19-21ksoftirqd/107:08:291
81730,0rcu_preempt19-21ksoftirqd/108:19:081
81720,0rcu_preempt19-21ksoftirqd/109:27:091
81720,0rcu_preempt19-21ksoftirqd/108:27:531
81710,0rcu_preempt19-21ksoftirqd/109:55:201
81710,0rcu_preempt19-21ksoftirqd/107:52:211
81700,0rcu_preempt19-21ksoftirqd/112:21:131
81690,0rcu_preempt19-21ksoftirqd/108:37:511
81680,0rcu_preempt19-21ksoftirqd/108:52:421
81670,0rcu_preempt3-21ksoftirqd/010:32:410
81660,0rcu_preempt19-21ksoftirqd/108:42:441
81660,0rcu_preempt19-21ksoftirqd/107:12:441
81620,0rcu_preempt29482-1kworker/0:1H12:07:450
81600,0rcu_preempt3-21ksoftirqd/011:07:330
81590,0rcu_preempt19-21ksoftirqd/108:59:351
10050590,0irq/346-48484001128-1kworker/0:0H09:24:330
9950580,0irq/345-484840030877-21apt-get09:12:320
10050580,0irq/346-4848400851-21rngd12:27:350
10050570,0irq/346-484840020891-21apt-get08:52:320
10050570,0irq/346-48484000-21swapper/011:19:000
10050560,0irq/346-4848400851-21rngd12:35:040
10050560,0irq/346-484840054-21kswapd011:51:560
10050560,0irq/346-484840054-21kswapd009:18:040
10050540,0irq/346-484840054-21kswapd010:58:000
10050540,0irq/346-484840054-21kswapd010:45:590
10050540,0irq/346-484840054-21kswapd009:56:120
10050540,0irq/346-484840018013-21munin-node0
10050530,0irq/346-484840054-21kswapd010:15:310
10050520,0irq/346-484840054-21kswapd011:56:150
10050520,0irq/346-484840054-21kswapd011:42:320
81510,0rcu_preempt19-21ksoftirqd/109:07:211
1868099517,0cyclictest2317-21ping07:59:300
10050510,0irq/346-4848400851-21rngd10:49:060
10050510,0irq/346-484840054-21kswapd011:40:320
81500,0rcu_preempt3-21ksoftirqd/010:18:380
10050500,0irq/346-484840054-21kswapd012:06:180
10050500,0irq/346-484840054-21kswapd011:59:370
10050500,0irq/346-484840054-21kswapd011:27:530
10050500,0irq/346-484840054-21kswapd010:31:380
10050500,0irq/346-484840054-21kswapd009:57:490
10050500,0irq/346-484840054-21kswapd008:37:210
10050500,0irq/346-48484000-21swapper/011:14:170
10050490,0irq/346-484840054-21kswapd012:21:200
10050490,0irq/346-484840054-21kswapd012:17:090
10050490,0irq/346-484840054-21kswapd011:34:420
10050490,0irq/346-484840054-21kswapd011:06:590
10050490,0irq/346-484840054-21kswapd010:53:270
10050490,0irq/346-484840054-21kswapd010:25:570
10050490,0irq/346-484840054-21kswapd010:10:370
10050490,0irq/346-484840054-21kswapd009:50:170
10050490,0irq/346-484840054-21kswapd009:40:090
10050490,0irq/346-48484000-21swapper/012:26:460
10050480,0irq/346-484840054-21kswapd011:23:180
10050480,0irq/346-484840054-21kswapd011:23:180
10050480,0irq/346-484840054-21kswapd010:06:180
10050480,0irq/346-484840054-21kswapd009:44:430
10050480,0irq/346-484840054-21kswapd009:34:120
10050480,0irq/346-484840020815-21ssh10:40:130
10050470,0irq/346-484840054-21kswapd009:27:530
10050470,0irq/346-484840054-21kswapd009:08:060
10050470,0irq/346-484840054-21kswapd007:57:200
10050460,0irq/346-484840054-21kswapd008:04:310
10050460,0irq/346-48484003-21ksoftirqd/007:42:210
10050440,0irq/346-48484005686-1kworker/0:2H08:07:430
10050440,0irq/346-484840022172-21wget07:17:350
10050440,0irq/346-484840013432-1kworker/0:0H07:12:370
10050440,0irq/346-484840012346-21sshd08:25:320
81420,0rcu_preempt19-21ksoftirqd/107:02:401
10050420,0irq/346-484840025948-21sed07:27:480
10050420,0irq/346-484840017863-21fw_packets08:42:370
81400,0rcu_preempt19694-21timerandwakeup07:07:480
10050400,0irq/346-484840054-21kswapd008:28:010
10050400,0irq/346-484840027530-21irqstats07:32:450
10050400,0irq/346-484840022578-21wget08:57:320
10050400,0irq/346-484840020739-21ls08:52:200
7362390,0sleep0711-1kworker/0:1H07:49:430
10050390,0irq/346-484840025738-21ssh09:07:220
9950370,0irq/345-48484000-21swapper/008:37:440
18680993711,0cyclictest0-21swapper/007:42:330
10050370,0irq/346-48484003-21ksoftirqd/007:22:530
9950360,0irq/345-48484009256-21sendmail-msp08:17:210
81360,0rcu_preempt3-21ksoftirqd/008:17:490
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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