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2025-12-30 - 16:51

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 Tue Dec 30, 2025 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811540,0rcu_preempt17891-21diskmemload10:05:521
811530,0rcu_preempt3-21ksoftirqd/010:58:220
811490,0rcu_preempt11033-21cyclictest10:59:041
811480,0rcu_preempt3-21ksoftirqd/011:23:310
811430,0rcu_preempt10519-1kworker/0:2H10:15:250
811370,0rcu_preempt3-21ksoftirqd/009:38:110
811350,0rcu_preempt54-21kswapd008:15:270
811350,0rcu_preempt11033-21cyclictest10:36:320
81890,0rcu_preempt3-21ksoftirqd/011:30:240
81800,0rcu_preempt19-21ksoftirqd/111:29:571
81790,0rcu_preempt3-21ksoftirqd/011:05:060
81790,0rcu_preempt19-21ksoftirqd/110:43:301
81760,0rcu_preempt11033-21cyclictest10:08:570
81750,0rcu_preempt3-21ksoftirqd/010:49:300
81740,0rcu_preempt3-21ksoftirqd/009:21:170
81740,0rcu_preempt19-21ksoftirqd/110:52:581
81740,0rcu_preempt17891-21diskmemload09:14:131
81720,0rcu_preempt54-21kswapd012:04:191
274202720,0chrt9950irq/345-484840009:56:110
319522710,0sleep010050irq/346-484840008:11:180
81700,0rcu_preempt19-21ksoftirqd/112:37:171
9950690,0irq/345-4848400181ktimersoftd/112:32:491
81690,0rcu_preempt0-21swapper/111:13:381
81690,0rcu_preempt0-21swapper/110:30:551
81680,0rcu_preempt882-21ssh09:26:171
81670,0rcu_preempt19-21ksoftirqd/109:34:111
10050670,0irq/346-4848400181ktimersoftd/109:36:331
9950660,0irq/345-4848400171rcuc/109:40:211
81660,0rcu_preempt3-21ksoftirqd/011:02:010
81660,0rcu_preempt19-21ksoftirqd/111:00:281
81660,0rcu_preempt19-21ksoftirqd/110:46:031
81660,0rcu_preempt19-21ksoftirqd/109:53:011
322712660,0sleep09950irq/345-484840012:29:020
81650,0rcu_preempt3-21ksoftirqd/011:37:160
81650,0rcu_preempt19-21ksoftirqd/112:15:441
81650,0rcu_preempt19-21ksoftirqd/112:07:271
81650,0rcu_preempt19-21ksoftirqd/111:45:201
81650,0rcu_preempt19-21ksoftirqd/110:22:041
81650,0rcu_preempt19-21ksoftirqd/110:19:111
9950640,0irq/345-4848400171rcuc/109:15:281
81640,0rcu_preempt19-21ksoftirqd/111:22:441
81630,0rcu_preempt3-21ksoftirqd/009:42:470
81630,0rcu_preempt19-21ksoftirqd/111:40:481
81630,0rcu_preempt19-21ksoftirqd/110:27:151
81630,0rcu_preempt17891-21diskmemload11:38:581
81620,0rcu_preempt54-21kswapd009:18:500
81620,0rcu_preempt54-21kswapd008:05:210
81620,0rcu_preempt3-21ksoftirqd/010:00:220
81620,0rcu_preempt19-21ksoftirqd/111:55:551
81620,0rcu_preempt19-21ksoftirqd/111:55:551
81620,0rcu_preempt19-21ksoftirqd/109:59:391
9950610,0irq/345-48484000-21swapper/007:59:550
81610,0rcu_preempt54-21kswapd010:20:110
81610,0rcu_preempt3-21ksoftirqd/012:21:270
81610,0rcu_preempt3-21ksoftirqd/011:13:080
81610,0rcu_preempt3-21ksoftirqd/010:10:170
81610,0rcu_preempt19-21ksoftirqd/110:03:091
10050610,0irq/346-4848400171rcuc/112:13:321
81600,0rcu_preempt54-21kswapd012:09:150
81600,0rcu_preempt31331-21kworker/0:110:40:030
81600,0rcu_preempt19-21ksoftirqd/110:10:361
81590,0rcu_preempt3-21ksoftirqd/012:10:490
81590,0rcu_preempt3-21ksoftirqd/009:47:350
81590,0rcu_preempt3-21ksoftirqd/007:15:100
81590,0rcu_preempt19-21ksoftirqd/107:29:191
81590,0rcu_preempt12144-1kworker/0:2H07:39:530
10050590,0irq/346-4848400181ktimersoftd/111:06:491
9950580,0irq/345-48484000-21swapper/007:55:080
81580,0rcu_preempt54-21kswapd009:52:590
81580,0rcu_preempt3-21ksoftirqd/012:34:380
81580,0rcu_preempt3-21ksoftirqd/011:50:100
81580,0rcu_preempt3-21ksoftirqd/011:43:580
81580,0rcu_preempt3-21ksoftirqd/010:54:470
81580,0rcu_preempt3-21ksoftirqd/010:34:440
10050580,0irq/346-484840054-21kswapd011:47:240
10050580,0irq/346-48484003568-21apt-get09:30:060
9950570,0irq/345-4848400171rcuc/109:20:231
81570,0rcu_preempt3-21ksoftirqd/009:12:500
81570,0rcu_preempt19-21ksoftirqd/112:25:471
81570,0rcu_preempt19-21ksoftirqd/111:27:201
10050570,0irq/346-48484006636-1kworker/0:1H11:59:580
10050570,0irq/346-484840014764-1kworker/0:1H09:00:210
9950560,0irq/345-4848400181ktimersoftd/108:59:531
81560,0rcu_preempt3-21ksoftirqd/010:29:410
10050560,0irq/346-48484004509-1kworker/0:0H08:30:220
10050560,0irq/346-484840031098-1kworker/0:2H11:17:070
10050560,0irq/346-484840020016-1kworker/0:1H12:15:240
81550,0rcu_preempt3-21ksoftirqd/012:39:520
81550,0rcu_preempt19-21ksoftirqd/108:00:021
81550,0rcu_preempt19-21ksoftirqd/107:45:361
81550,0rcu_preempt19-21ksoftirqd/107:40:001
10050550,0irq/346-4848400354-21sshd09:25:330
81540,0rcu_preempt3-21ksoftirqd/007:40:240
9950530,0irq/345-484840054-21kswapd011:58:320
9950530,0irq/345-484840054-21kswapd011:58:320
10050530,0irq/346-48484008263-1kworker/0:1H11:25:150
10050530,0irq/346-484840024388-21cpu07:50:060
81520,0rcu_preempt19-21ksoftirqd/109:46:361
39822520,0sleep09950irq/345-484840008:25:200
10050520,0irq/346-4848400181ktimersoftd/111:52:391
10050520,0irq/346-484840012997-1kworker/0:2H08:55:190
81510,0rcu_preempt19-21ksoftirqd/108:25:041
11035995111,0cyclictest21587-1kworker/1:1H12:20:071
9950500,0irq/345-484840014300-21ping07:30:200
81500,0rcu_preempt9871-21apt-get08:45:050
28162500,0sleep010050irq/346-484840008:21:050
10050500,0irq/346-484840014764-1kworker/0:1H09:05:070
10050500,0irq/346-48484001050-21ssh11:16:071
9950490,0irq/345-48484008157-21latency_hist08:39:540
81490,0rcu_preempt27283-21ping08:05:091
81490,0rcu_preempt19-21ksoftirqd/110:38:141
9950480,0irq/345-48484000-21swapper/008:40:070
81480,0rcu_preempt19-21ksoftirqd/108:10:101
81470,0rcu_preempt3-21ksoftirqd/007:25:240
81470,0rcu_preempt19-21ksoftirqd/108:20:161
81470,0rcu_preempt19-21ksoftirqd/108:16:431
10050470,0irq/346-48484000-21swapper/007:10:100
81460,0rcu_preempt19-21ksoftirqd/107:22:021
13250460,0irq/301-48020003-21ksoftirqd/007:45:120
1103599469,0cyclictest12997-21ssh07:15:081
81450,0rcu_preempt19-21ksoftirqd/107:30:441
81440,0rcu_preempt19-21ksoftirqd/109:00:201
81440,0rcu_preempt11507-21apt-get08:50:050
1103599448,0cyclictest17047-21munin-node1
10050440,0irq/346-48484003-21ksoftirqd/007:20:200
81430,0rcu_preempt19-21ksoftirqd/107:59:101
10050430,0irq/346-4848400171rcuc/107:38:451
10050420,0irq/346-48484009067-1kworker/0:3H07:05:070
1103599419,0cyclictest5186-21forks08:30:101
81400,0rcu_preempt19-21ksoftirqd/108:50:161
81400,0rcu_preempt19-21ksoftirqd/108:39:531
81390,0rcu_preempt19-21ksoftirqd/107:05:141
81380,0rcu_preempt19-21ksoftirqd/108:45:121
81380,0rcu_preempt19-21ksoftirqd/107:10:131
81370,0rcu_preempt19-21ksoftirqd/108:42:271
81370,0rcu_preempt19-21ksoftirqd/107:53:511
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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