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2026-03-16 - 19:48

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 Mon Mar 16, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811010,0rcu_preempt9950irq/345-484840010:09:160
81870,0rcu_preempt19-21ksoftirqd/109:24:271
10050870,0irq/346-48484000-21swapper/010:30:100
81860,0rcu_preempt19-21ksoftirqd/112:28:071
81840,0rcu_preempt19-21ksoftirqd/110:38:351
81840,0rcu_preempt19-21ksoftirqd/107:38:171
81830,0rcu_preempt19-21ksoftirqd/107:41:461
81830,0rcu_preempt19-21ksoftirqd/107:20:481
81820,0rcu_preempt25516-21ssh11:40:001
81820,0rcu_preempt19-21ksoftirqd/110:09:121
81820,0rcu_preempt19-21ksoftirqd/108:24:291
81820,0rcu_preempt19-21ksoftirqd/108:23:361
81820,0rcu_preempt19-21ksoftirqd/108:10:051
81820,0rcu_preempt19-21ksoftirqd/107:27:091
81820,0rcu_preempt14806-21ping07:57:591
81810,0rcu_preempt5758-21diskmemload09:41:341
81810,0rcu_preempt19-21ksoftirqd/112:03:181
81810,0rcu_preempt19-21ksoftirqd/111:45:001
81810,0rcu_preempt19-21ksoftirqd/111:25:201
81810,0rcu_preempt19-21ksoftirqd/111:09:341
81810,0rcu_preempt19-21ksoftirqd/108:16:551
81810,0rcu_preempt19-21ksoftirqd/108:08:191
81800,0rcu_preempt6524-21ssh11:20:511
81800,0rcu_preempt5758-21diskmemload12:19:321
81800,0rcu_preempt5758-21diskmemload12:19:321
81800,0rcu_preempt54-21kswapd010:59:151
81800,0rcu_preempt54-21kswapd009:59:171
81800,0rcu_preempt19-21ksoftirqd/110:28:031
81800,0rcu_preempt19-21ksoftirqd/108:44:121
81790,0rcu_preempt3272-21ssh10:44:251
81790,0rcu_preempt19-21ksoftirqd/110:20:481
81790,0rcu_preempt19-21ksoftirqd/108:29:041
81780,0rcu_preempt5758-21diskmemload09:29:361
81780,0rcu_preempt19-21ksoftirqd/111:37:491
81780,0rcu_preempt19-21ksoftirqd/111:08:231
81780,0rcu_preempt19-21ksoftirqd/110:55:531
81780,0rcu_preempt19-21ksoftirqd/109:51:081
81780,0rcu_preempt19-21ksoftirqd/107:29:221
81770,0rcu_preempt5758-21diskmemload11:53:021
81770,0rcu_preempt19-21ksoftirqd/110:52:201
81770,0rcu_preempt19-21ksoftirqd/110:16:261
81770,0rcu_preempt19-21ksoftirqd/109:45:501
81770,0rcu_preempt19-21ksoftirqd/107:53:371
81760,0rcu_preempt19-21ksoftirqd/112:36:191
81760,0rcu_preempt19-21ksoftirqd/111:33:131
81760,0rcu_preempt19-21ksoftirqd/109:09:161
81760,0rcu_preempt19-21ksoftirqd/108:54:201
81760,0rcu_preempt19-21ksoftirqd/107:47:021
81760,0rcu_preempt19-21ksoftirqd/107:14:041
81750,0rcu_preempt5758-21diskmemload09:23:231
81750,0rcu_preempt19-21ksoftirqd/111:14:491
81750,0rcu_preempt19-21ksoftirqd/110:29:291
81750,0rcu_preempt19-21ksoftirqd/110:07:131
81750,0rcu_preempt19-21ksoftirqd/109:35:591
81750,0rcu_preempt19-21ksoftirqd/109:18:211
81750,0rcu_preempt19-21ksoftirqd/109:18:211
81750,0rcu_preempt1920-21kworker/1:112:04:551
81740,0rcu_preempt19267-21ssh09:54:421
81740,0rcu_preempt19-21ksoftirqd/112:13:571
81740,0rcu_preempt19-21ksoftirqd/112:13:571
81740,0rcu_preempt19-21ksoftirqd/111:54:001
81740,0rcu_preempt19-21ksoftirqd/110:42:101
81740,0rcu_preempt19-21ksoftirqd/108:42:451
81740,0rcu_preempt19-21ksoftirqd/108:00:181
81730,0rcu_preempt19-21ksoftirqd/112:31:051
81730,0rcu_preempt19-21ksoftirqd/112:16:041
81730,0rcu_preempt19-21ksoftirqd/108:37:581
81700,0rcu_preempt19-21ksoftirqd/109:05:371
81700,0rcu_preempt19-21ksoftirqd/109:01:021
81700,0rcu_preempt19-21ksoftirqd/108:49:501
81690,0rcu_preempt19-21ksoftirqd/107:09:121
81590,0rcu_preempt3-21ksoftirqd/011:22:190
81570,0rcu_preempt3-21ksoftirqd/011:05:430
81560,0rcu_preempt3-21ksoftirqd/011:30:380
10050560,0irq/346-484840054-21kswapd011:12:210
10050550,0irq/346-4848400851-21rngd11:48:400
10050540,0irq/346-484840054-21kswapd011:57:230
81530,0rcu_preempt3-21ksoftirqd/012:23:040
81530,0rcu_preempt3-21ksoftirqd/012:23:040
10050530,0irq/346-4848400851-21rngd09:29:450
10050530,0irq/346-4848400851-21rngd09:27:060
10050530,0irq/346-484840054-21kswapd012:25:580
10050530,0irq/346-484840054-21kswapd010:20:180
10050530,0irq/346-484840054-21kswapd009:59:300
10050530,0irq/346-484840031175-21cyclictest11:17:150
10050520,0irq/346-484840054-21kswapd010:59:220
10050510,0irq/346-4848400851-21rngd12:05:410
10050510,0irq/346-48484006860-21kworker/0:012:33:170
10050510,0irq/346-484840054-21kswapd009:55:050
10050500,0irq/346-484840054-21kswapd012:34:010
10050500,0irq/346-484840054-21kswapd011:42:430
10050500,0irq/346-484840054-21kswapd011:34:070
10050500,0irq/346-484840054-21kswapd010:15:340
10050500,0irq/346-484840054-21kswapd009:36:270
10050500,0irq/346-484840054-21kswapd009:12:590
10050500,0irq/346-48484000-21swapper/011:49:210
10050490,0irq/346-484840054-21kswapd010:50:170
10050490,0irq/346-484840054-21kswapd010:45:500
10050490,0irq/346-484840054-21kswapd010:39:000
10050490,0irq/346-484840054-21kswapd010:25:320
10050490,0irq/346-484840054-21kswapd009:51:090
10050490,0irq/346-484840054-21kswapd009:44:330
10050490,0irq/346-484840054-21kswapd009:40:440
10050490,0irq/346-484840054-21kswapd009:17:590
10050490,0irq/346-484840054-21kswapd009:17:590
10050490,0irq/346-48484000-21swapper/010:35:120
10050490,0irq/346-48484000-21swapper/010:07:210
81480,0rcu_preempt29674-21apt-get07:04:101
10050480,0irq/346-484840054-21kswapd012:09:490
10050480,0irq/346-484840054-21kswapd012:09:490
10050480,0irq/346-484840011092-21munin-node0
10050480,0irq/346-484840010726-21ssh11:24:550
10050480,0irq/346-48484000-21swapper/010:57:370
10050470,0irq/346-484840054-21kswapd009:21:470
10050460,0irq/346-484840030608-21munin-node0
10050460,0irq/346-48484000-21swapper/012:17:470
10050450,0irq/346-484840031312-21dropbear07:09:030
3117699442,0cyclictest0-21swapper/008:18:580
10050440,0irq/346-484840054-21kswapd007:50:500
9950430,0irq/345-48484003-21ksoftirqd/008:00:520
13250430,0irq/301-48020000-21swapper/007:14:110
10050420,0irq/346-484840054-21kswapd008:23:580
10050420,0irq/346-484840017213-21fschecks_time08:04:150
9950410,0irq/345-48484000-21swapper/007:24:200
9950410,0irq/345-48484000-21swapper/007:19:330
31176994117,0cyclictest0-21swapper/007:56:150
81400,0rcu_preempt6842-21kworker/0:007:39:180
1599400,0migration/0613-21runrttasks08:52:150
10050400,0irq/346-484840024965-21sshd08:28:290
10050390,0irq/346-484840028942-21if_eth308:39:190
81380,0rcu_preempt2053-21ping07:34:100
10050380,0irq/346-484840018159-1kworker/0:1H08:08:590
10050380,0irq/346-48484000-21swapper/008:59:250
9950370,0irq/345-48484000-21swapper/008:36:000
3117699372,0cyclictest0-21swapper/009:04:160
22682370,0chrt2182-1kworker/0:2H08:56:570
10050370,0irq/346-48484003-21ksoftirqd/007:44:260
10050370,0irq/346-48484000-21swapper/008:44:210
31176993612,0cyclictest0-21swapper/007:32:360
263292350,0sleep024732-1kworker/0:0H08:30:310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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