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2026-03-14 - 16:01

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 Sat Mar 14, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811100,0rcu_preempt3-21ksoftirqd/010:34:290
811070,0rcu_preempt3-21ksoftirqd/009:14:010
811050,0rcu_preempt3-21ksoftirqd/012:09:470
81960,0rcu_preempt3-21ksoftirqd/008:59:220
81940,0rcu_preempt3-21ksoftirqd/011:56:030
81850,0rcu_preempt3-21ksoftirqd/009:39:210
81820,0rcu_preempt3-21ksoftirqd/012:28:400
81790,0rcu_preempt54-21kswapd012:34:211
81770,0rcu_preempt18381-21munin-node1
81760,0rcu_preempt54-21kswapd012:17:070
81730,0rcu_preempt3-21ksoftirqd/011:36:580
81730,0rcu_preempt3-21ksoftirqd/011:36:580
81730,0rcu_preempt19-21ksoftirqd/108:24:281
81720,0rcu_preempt3-21ksoftirqd/012:37:150
81710,0rcu_preempt3-21ksoftirqd/011:33:190
81710,0rcu_preempt3-21ksoftirqd/010:24:190
81710,0rcu_preempt24627-1kworker/1:2H09:29:121
81680,0rcu_preempt3-21ksoftirqd/012:29:190
81680,0rcu_preempt3-21ksoftirqd/010:44:180
81680,0rcu_preempt19-21ksoftirqd/110:59:281
81670,0rcu_preempt3-21ksoftirqd/009:34:270
81670,0rcu_preempt19-21ksoftirqd/111:39:201
81660,0rcu_preempt54-21kswapd011:22:250
81660,0rcu_preempt3-21ksoftirqd/010:54:200
81660,0rcu_preempt3-21ksoftirqd/010:54:200
81650,0rcu_preempt3-21ksoftirqd/010:20:270
81630,0rcu_preempt3-21ksoftirqd/011:09:200
81630,0rcu_preempt3-21ksoftirqd/011:00:170
81630,0rcu_preempt3-21ksoftirqd/010:32:390
86842610,0chrt10050irq/346-484840007:32:350
81610,0rcu_preempt581-21cyclictest11:24:140
81600,0rcu_preempt3-21ksoftirqd/010:49:190
81600,0rcu_preempt3-21ksoftirqd/010:39:260
81600,0rcu_preempt3-21ksoftirqd/009:46:160
81600,0rcu_preempt19-21ksoftirqd/112:29:231
81590,0rcu_preempt3-21ksoftirqd/011:04:220
81590,0rcu_preempt19-21ksoftirqd/109:56:471
81570,0rcu_preempt3-21ksoftirqd/012:23:460
81570,0rcu_preempt3-21ksoftirqd/007:14:000
81560,0rcu_preempt3-21ksoftirqd/008:29:110
81560,0rcu_preempt3-21ksoftirqd/007:59:190
81560,0rcu_preempt19-21ksoftirqd/109:09:161
81550,0rcu_preempt3-21ksoftirqd/008:24:120
81550,0rcu_preempt3-21ksoftirqd/007:54:260
81540,0rcu_preempt3-21ksoftirqd/011:59:280
9950530,0irq/345-484840019-21ksoftirqd/111:48:031
81530,0rcu_preempt3-21ksoftirqd/012:04:280
81530,0rcu_preempt3-21ksoftirqd/012:04:280
81530,0rcu_preempt3-21ksoftirqd/010:03:400
81530,0rcu_preempt3-21ksoftirqd/007:39:220
81530,0rcu_preempt31614-21timerandwakeup11:44:250
81530,0rcu_preempt19-21ksoftirqd/112:04:111
81530,0rcu_preempt19-21ksoftirqd/112:04:111
81520,0rcu_preempt3-21ksoftirqd/009:56:360
81520,0rcu_preempt3-21ksoftirqd/009:19:250
81520,0rcu_preempt29960-21kworker/u4:109:24:250
81510,0rcu_preempt3-21ksoftirqd/008:49:240
81510,0rcu_preempt19-21ksoftirqd/111:24:081
9950500,0irq/345-484840027547-21apt-get09:29:110
81500,0rcu_preempt3-21ksoftirqd/010:04:290
81500,0rcu_preempt19-21ksoftirqd/111:14:261
81500,0rcu_preempt19-21ksoftirqd/111:04:141
81500,0rcu_preempt19-21ksoftirqd/110:09:011
81480,0rcu_preempt19-21ksoftirqd/110:39:341
9950470,0irq/345-484840019-21ksoftirqd/112:20:291
81470,0rcu_preempt3-21ksoftirqd/011:39:260
81470,0rcu_preempt3-21ksoftirqd/010:09:250
81470,0rcu_preempt3-21ksoftirqd/008:39:190
81470,0rcu_preempt3-21ksoftirqd/007:14:140
81470,0rcu_preempt3-21ksoftirqd/007:14:140
81460,0rcu_preempt7280-1kworker/1:2H09:15:451
81460,0rcu_preempt19-21ksoftirqd/111:54:101
81460,0rcu_preempt19-21ksoftirqd/107:04:221
9950450,0irq/345-484840016804-21ping08:06:150
81450,0rcu_preempt3-21ksoftirqd/011:49:120
81450,0rcu_preempt19-21ksoftirqd/110:36:531
10050450,0irq/346-484840020471-21munin-node0
10050450,0irq/346-484840020471-21munin-node0
10050450,0irq/346-484840015039-21ssh09:49:130
10050450,0irq/346-484840012952-21munin-node0
10050450,0irq/346-48484000-21swapper/011:18:060
10050450,0irq/346-48484000-21swapper/010:16:200
81440,0rcu_preempt3-21ksoftirqd/007:05:080
81430,0rcu_preempt54-21kswapd009:11:190
81430,0rcu_preempt3-21ksoftirqd/008:34:170
81430,0rcu_preempt3-21ksoftirqd/008:14:010
81430,0rcu_preempt19-21ksoftirqd/111:36:591
81430,0rcu_preempt19-21ksoftirqd/111:36:591
102022430,0chrt10050irq/346-484840007:36:180
10050430,0irq/346-48484003036-21munin-node0
10050430,0irq/346-484840024448-21sshd08:19:270
10050430,0irq/346-484840014123-21munin-node0
81420,0rcu_preempt19-21ksoftirqd/109:59:241
81410,0rcu_preempt30014-1kworker/1:2H12:16:331
81410,0rcu_preempt19-21ksoftirqd/112:09:031
81410,0rcu_preempt0-21swapper/111:11:381
81400,0rcu_preempt19-21ksoftirqd/111:23:431
81400,0rcu_preempt19-21ksoftirqd/110:26:011
81400,0rcu_preempt19-21ksoftirqd/110:19:111
81400,0rcu_preempt19-21ksoftirqd/109:04:241
81400,0rcu_preempt19-21ksoftirqd/107:49:191
81400,0rcu_preempt19-21ksoftirqd/107:09:261
10050400,0irq/346-48484007617-1kworker/0:1H09:09:000
10050400,0irq/346-48484003-21ksoftirqd/007:22:080
10050400,0irq/346-48484003-21ksoftirqd/007:22:080
10050400,0irq/346-484840029809-1kworker/0:1H08:44:250
81390,0rcu_preempt3-21ksoftirqd/007:24:300
81390,0rcu_preempt19-21ksoftirqd/112:03:541
81390,0rcu_preempt19-21ksoftirqd/111:29:091
81380,0rcu_preempt8551-1kworker/1:2H07:34:001
81380,0rcu_preempt21695-1kworker/1:1H08:14:241
81380,0rcu_preempt19-21ksoftirqd/111:49:111
81380,0rcu_preempt19-21ksoftirqd/108:49:201
57682381,0sleep15862-21ssh12:24:231
81370,0rcu_preempt19-21ksoftirqd/110:44:171
81370,0rcu_preempt19-21ksoftirqd/110:30:291
81370,0rcu_preempt19-21ksoftirqd/110:17:151
1699370,0migration/115414-21munin-node1
9950360,0irq/345-484840024409-21runrttasks09:25:101
81360,0rcu_preempt19-21ksoftirqd/110:12:331
81360,0rcu_preempt19-21ksoftirqd/109:47:121
4350360,0irq/32-433000000-21swapper/108:09:171
4350360,0irq/32-433000000-21swapper/108:09:171
81350,0rcu_preempt19-21ksoftirqd/108:44:171
1699350,0migration/118837-21runrttasks08:04:111
81340,0rcu_preempt19-21ksoftirqd/110:55:071
81340,0rcu_preempt19-21ksoftirqd/110:55:071
81340,0rcu_preempt19-21ksoftirqd/110:50:161
1699340,0migration/16498-21sh09:39:491
10050340,0irq/346-48484008551-1kworker/1:2H07:59:001
9950330,0irq/345-48484003063-21taskset09:36:481
9950330,0irq/345-484840030164-21munin-run08:39:001
81330,0rcu_preempt19-21ksoftirqd/107:59:201
135842330,0chrt13479-1kworker/1:0H07:47:191
10050330,0irq/346-484840024026-21http_loadtime08:19:191
9950320,0irq/345-48484003905-21munin-plugin-st07:19:001
9950320,0irq/345-48484003905-21munin-plugin-st07:19:001
57962320,0chrt5642-1kworker/1:1H09:02:041
1699320,0migration/130339-21aten_rapower_cu08:39:121
1699320,0migration/128392-21taskset08:32:421
81300,0rcu_preempt19-21ksoftirqd/108:54:121
81290,0rcu_preempt0-21swapper/107:34:541
81290,0rcu_preempt0-21swapper/107:27:071
9950280,0irq/345-48484003904-21ping07:39:231
81280,0rcu_preempt19-21ksoftirqd/107:21:191
81280,0rcu_preempt19-21ksoftirqd/107:21:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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