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2026-08-06 - 17:46

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 highest latencies:
System rackaslot5s.osadl.org (updated Thu Aug 06, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81960,0rcu_preempt3-21ksoftirqd/007:40:120
81900,0rcu_preempt3-21ksoftirqd/010:55:090
81890,0rcu_preempt3-21ksoftirqd/007:35:150
81870,0rcu_preempt3-21ksoftirqd/007:45:270
81870,0rcu_preempt3-21ksoftirqd/007:20:180
81740,0rcu_preempt3-21ksoftirqd/011:06:410
81730,0rcu_preempt3-21ksoftirqd/011:41:470
81730,0rcu_preempt3-21ksoftirqd/009:42:080
81720,0rcu_preempt0-21swapper/009:34:480
81700,0rcu_preempt3-21ksoftirqd/011:15:380
81700,0rcu_preempt29630-21ssh11:10:190
81700,0rcu_preempt29630-21ssh11:10:190
81690,0rcu_preempt14326-21ssh12:35:040
81690,0rcu_preempt14326-21ssh12:35:040
81680,0rcu_preempt3-21ksoftirqd/011:30:210
1625996727,0cyclictest26044-21munin-node0
10050670,0irq/346-484840012696-1kworker/0:0H09:50:040
81660,0rcu_preempt836-21rngd08:25:100
1625996631,0cyclictest13289-1kworker/0:2H11:27:290
1625996630,0cyclictest27042-21apt-get10:35:050
1625996625,0cyclictest8403-1kworker/0:0H11:36:520
1625996624,0cyclictest21265-1kworker/0:0H11:04:370
81650,0rcu_preempt3-21ksoftirqd/012:28:280
1625996533,0cyclictest31931-21ssh10:40:040
1625996525,0cyclictest24735-1kworker/0:2H12:14:210
10050650,0irq/346-484840019-21ksoftirqd/108:25:101
81640,0rcu_preempt17661-21ping08:05:250
1625996425,0cyclictest10168-1kworker/0:1H11:58:360
1625996423,0cyclictest8544-21diskstats07:30:100
1625996419,0cyclictest25515-1kworker/0:1H09:29:520
10050640,0irq/346-484840054-21kswapd012:30:150
81630,0rcu_preempt17661-21ping08:20:180
1625996328,0cyclictest7503-21apt-get10:15:040
1625996328,0cyclictest2229-21wget08:50:050
1625996228,0cyclictest21701-21ssh10:29:350
1625996226,0cyclictest8586-21diskmemload11:51:160
1625996225,0cyclictest2900-1kworker/0:0H09:38:100
1625996225,0cyclictest22464-1kworker/0:3H09:59:250
1625996224,0cyclictest10873-1kworker/0:2H09:17:290
81610,0rcu_preempt3-21ksoftirqd/009:45:040
81610,0rcu_preempt3-21ksoftirqd/009:20:060
81610,0rcu_preempt3-21ksoftirqd/008:30:170
81610,0rcu_preempt3-21ksoftirqd/008:30:170
1625996128,0cyclictest13987-21ssh10:20:480
1625996125,0cyclictest0-21swapper/011:45:030
81600,0rcu_preempt3-21ksoftirqd/010:50:040
1625996030,0cyclictest13701-21munin-node0
1625996028,0cyclictest15043-21munin-node0
1625996027,0cyclictest1730-1kworker/0:1H10:45:030
10050600,0irq/346-484840054-21kswapd012:28:381
10050600,0irq/346-484840054-21kswapd011:02:231
10050600,0irq/346-4848400407-1kworker/1:0H12:05:551
10050600,0irq/346-4848400407-1kworker/1:0H12:05:551
9950590,0irq/345-48484002583-21munin-node1
1625995920,0cyclictest0-21swapper/012:09:240
1625995920,0cyclictest0-21swapper/012:09:240
10050590,0irq/346-484840054-21kswapd011:21:131
10050590,0irq/346-484840024735-1kworker/0:2H12:19:340
81580,0rcu_preempt3-21ksoftirqd/008:00:040
1625995828,0cyclictest9788-21munin-node0
1625995820,0cyclictest0-21swapper/010:06:540
10050580,0irq/346-484840024354-1kworker/0:2H10:32:300
81570,0rcu_preempt3-21ksoftirqd/009:00:110
81570,0rcu_preempt3-21ksoftirqd/008:15:230
81570,0rcu_preempt3-21ksoftirqd/007:15:200
81570,0rcu_preempt1230-21ps08:45:170
1625995725,0cyclictest27366-1kworker/0:0H10:11:230
1625995725,0cyclictest0-21swapper/012:20:080
1625995724,0cyclictest10050irq/346-484840011:20:140
1625995622,0cyclictest18064-21sed07:59:540
81550,0rcu_preempt3-21ksoftirqd/008:40:180
1625995522,0cyclictest0-21swapper/008:11:260
10050550,0irq/346-484840054-21kswapd011:18:101
10050550,0irq/346-484840054-21kswapd011:10:501
10050550,0irq/346-484840054-21kswapd011:10:501
1625995424,0cyclictest30785-1kworker/0:2H08:39:530
10050540,0irq/346-484840054-21kswapd011:41:021
10050540,0irq/346-48484003977-21ssh10:44:411
81530,0rcu_preempt19-21ksoftirqd/109:37:091
1625995328,0cyclictest8598-21ssh09:09:540
1625995328,0cyclictest8598-21ssh09:09:540
1625995328,0cyclictest4905-21ping07:25:050
10050530,0irq/346-484840054-21kswapd011:54:121
10050530,0irq/346-484840024353-1kworker/1:2H10:33:301
81520,0rcu_preempt1380-21taskset07:07:381
1625995234,0cyclictest1769-21apt-get07:10:030
10050520,0irq/346-484840054-21kswapd011:27:281
10050520,0irq/346-484840029229-1kworker/1:1H10:39:411
10050520,0irq/346-484840011880-1kworker/1:3H12:33:451
10050510,0irq/346-48484009895-21ssh09:44:181
10050510,0irq/346-48484006477-21ssh10:46:291
10050510,0irq/346-484840054-21kswapd012:17:421
10050510,0irq/346-484840027235-21ssh10:01:231
10050510,0irq/346-484840019695-21ssh11:33:501
10050510,0irq/346-484840019477-1kworker/1:0H10:26:441
10050510,0irq/346-484840011555-21ssh11:58:441
10050510,0irq/346-484840011516-21ssh09:12:161
81500,0rcu_preempt19-21ksoftirqd/108:14:531
1625995031,0cyclictest3807-21apt-get08:55:040
1625995031,0cyclictest3807-21apt-get08:55:040
10050500,0irq/346-484840027527-21ssh09:29:101
10050500,0irq/346-484840024768-21ssh12:11:561
10050500,0irq/346-484840023109-21ssh09:57:251
10050500,0irq/346-484840018317-21ssh09:19:531
10050500,0irq/346-484840012662-21ssh12:00:011
81490,0rcu_preempt19-21ksoftirqd/107:20:041
10050490,0irq/346-4848400407-1kworker/1:0H11:49:111
10050490,0irq/346-484840030706-21ssh09:31:531
10050490,0irq/346-484840021082-21ssh09:22:031
10050490,0irq/346-484840015932-21ssh12:35:521
10050490,0irq/346-484840015932-21ssh12:35:521
10050490,0irq/346-484840014246-21ssh09:48:351
10050490,0irq/346-484840010185-21kworker/1:110:05:141
81480,0rcu_preempt3-21ksoftirqd/007:05:080
10050480,0irq/346-484840054-21kswapd011:06:491
10050470,0irq/346-484840016930-21ssh10:24:451
10050460,0irq/346-484840018676-21ssh09:52:591
81450,0rcu_preempt19-21ksoftirqd/112:23:581
81450,0rcu_preempt19-21ksoftirqd/110:50:141
10050450,0irq/346-484840054-21kswapd007:27:081
81440,0rcu_preempt19-21ksoftirqd/110:15:141
81430,0rcu_preempt836-21rngd10:56:411
81430,0rcu_preempt19-21ksoftirqd/108:05:191
81430,0rcu_preempt19-21ksoftirqd/107:38:121
81430,0rcu_preempt19-21ksoftirqd/107:30:021
81420,0rcu_preempt17661-21ping08:19:541
81410,0rcu_preempt19-21ksoftirqd/111:35:041
81410,0rcu_preempt19-21ksoftirqd/108:55:051
81410,0rcu_preempt19-21ksoftirqd/108:55:051
81410,0rcu_preempt19-21ksoftirqd/107:40:141
9950400,0irq/345-48484000-21swapper/108:00:111
81400,0rcu_preempt19-21ksoftirqd/108:19:521
81400,0rcu_preempt19-21ksoftirqd/107:45:211
81390,0rcu_preempt19-21ksoftirqd/107:59:531
81380,0rcu_preempt19-21ksoftirqd/108:36:471
81380,0rcu_preempt19-21ksoftirqd/107:19:531
81370,0rcu_preempt19-21ksoftirqd/109:00:051
81370,0rcu_preempt19-21ksoftirqd/108:45:191
81370,0rcu_preempt19-21ksoftirqd/107:10:031
81360,0rcu_preempt19-21ksoftirqd/109:04:541
81360,0rcu_preempt19-21ksoftirqd/109:04:541
81360,0rcu_preempt19-21ksoftirqd/108:40:061
81360,0rcu_preempt19-21ksoftirqd/108:30:141
81360,0rcu_preempt19-21ksoftirqd/108:30:141
81350,0rcu_preempt19-21ksoftirqd/108:49:531
81350,0rcu_preempt19-21ksoftirqd/107:50:061
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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