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2026-03-15 - 19:00

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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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 Sun Mar 15, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81890,0rcu_preempt19-21ksoftirqd/111:08:591
81880,0rcu_preempt19-21ksoftirqd/109:49:201
81870,0rcu_preempt0-21swapper/112:14:261
10050860,0irq/346-484840081rcu_preempt11:51:360
81850,0rcu_preempt19-21ksoftirqd/109:58:011
81800,0rcu_preempt19-21ksoftirqd/107:28:591
81750,0rcu_preempt54-21kswapd009:12:281
81750,0rcu_preempt3-21ksoftirqd/011:25:320
81750,0rcu_preempt3-21ksoftirqd/010:00:150
81740,0rcu_preempt3-21ksoftirqd/012:21:420
81740,0rcu_preempt3-21ksoftirqd/010:08:100
81740,0rcu_preempt26218-21kworker/0:011:09:030
81740,0rcu_preempt19-21ksoftirqd/111:12:041
81740,0rcu_preempt19-21ksoftirqd/110:25:051
81740,0rcu_preempt19-21ksoftirqd/109:15:451
81730,0rcu_preempt3-21ksoftirqd/010:59:590
81730,0rcu_preempt3-21ksoftirqd/009:20:290
81730,0rcu_preempt3-21ksoftirqd/009:16:160
81720,0rcu_preempt3-21ksoftirqd/012:31:490
81720,0rcu_preempt3-21ksoftirqd/011:20:390
81720,0rcu_preempt3-21ksoftirqd/010:11:160
81710,0rcu_preempt851-21rngd10:03:311
81700,0rcu_preempt3-21ksoftirqd/012:02:430
81700,0rcu_preempt3-21ksoftirqd/011:45:140
81700,0rcu_preempt3-21ksoftirqd/011:32:140
81700,0rcu_preempt26639-21ssh11:39:171
81690,0rcu_preempt3-21ksoftirqd/010:39:350
81690,0rcu_preempt3-21ksoftirqd/010:39:350
81690,0rcu_preempt3-21ksoftirqd/009:13:150
81690,0rcu_preempt19-21ksoftirqd/107:20:231
111690,0rcuc/018515-1kworker/0:0H11:35:010
81670,0rcu_preempt54-21kswapd012:37:080
81640,0rcu_preempt19-21ksoftirqd/111:00:231
81640,0rcu_preempt19-21ksoftirqd/108:14:311
10050640,0irq/346-484840017034-21ssh12:02:191
9950610,0irq/345-48484001444-1kworker/1:2H10:43:061
9950610,0irq/345-48484001444-1kworker/1:2H10:43:061
81610,0rcu_preempt851-21rngd12:13:500
10050610,0irq/346-484840030715-21ssh10:37:531
10050610,0irq/346-484840023995-21ssh10:30:301
10050610,0irq/346-48484002050-21ssh09:35:071
81600,0rcu_preempt19-21ksoftirqd/111:24:351
10050590,0irq/346-48484002321-21meminfo11:14:211
10050590,0irq/346-48484001111-21ssh11:45:521
81570,0rcu_preempt3-21ksoftirqd/009:29:160
81570,0rcu_preempt30105-21kworker/0:209:08:230
9950560,0irq/345-484840011322-1kworker/1:1H10:54:131
9950550,0irq/345-4848400171rcuc/109:21:141
81550,0rcu_preempt3-21ksoftirqd/009:27:140
81550,0rcu_preempt19-21ksoftirqd/112:10:131
10050550,0irq/346-4848400910-21cyclictest11:34:141
10050550,0irq/346-484840012207-21ssh10:19:131
9950540,0irq/345-48484003-21ksoftirqd/012:14:360
81540,0rcu_preempt54-21kswapd009:48:471
81540,0rcu_preempt3-21ksoftirqd/007:08:040
10050540,0irq/346-48484002934-1kworker/0:1H09:40:440
9950530,0irq/345-48484003159-1kworker/1:0H12:25:171
9950530,0irq/345-48484001444-1kworker/1:2H10:45:221
81530,0rcu_preempt3-21ksoftirqd/008:16:090
81530,0rcu_preempt19-21ksoftirqd/107:39:291
9950520,0irq/345-48484003-21ksoftirqd/010:53:550
81520,0rcu_preempt3-21ksoftirqd/010:17:470
81520,0rcu_preempt3-21ksoftirqd/008:23:560
81520,0rcu_preempt19-21ksoftirqd/112:19:101
81520,0rcu_preempt19-21ksoftirqd/109:29:141
9950510,0irq/345-484840025486-1kworker/1:2H09:28:031
9950510,0irq/345-48484000-21swapper/010:23:440
81510,0rcu_preempt3-21ksoftirqd/009:51:060
81510,0rcu_preempt3-21ksoftirqd/008:12:020
81510,0rcu_preempt3-21ksoftirqd/008:04:280
81510,0rcu_preempt3-21ksoftirqd/007:56:590
81510,0rcu_preempt28291-21ssh10:34:390
81510,0rcu_preempt19-21ksoftirqd/108:04:151
81510,0rcu_preempt19-21ksoftirqd/107:29:021
9950500,0irq/345-48484003683-1kworker/1:3H11:32:191
9950500,0irq/345-48484003-21ksoftirqd/010:44:590
9950500,0irq/345-484840020577-1kworker/1:1H09:41:541
9950500,0irq/345-4848400171rcuc/110:15:581
81500,0rcu_preempt7937-21diskmemload11:14:230
81500,0rcu_preempt54-21kswapd012:29:201
81500,0rcu_preempt32033-21kworker/0:212:27:000
81500,0rcu_preempt19-21ksoftirqd/112:08:591
10050500,0irq/346-484840025744-21aten_rapower_cu08:24:121
81490,0rcu_preempt9239-21kworker/1:012:34:111
81490,0rcu_preempt3-21ksoftirqd/011:04:040
81490,0rcu_preempt3-21ksoftirqd/009:44:390
81490,0rcu_preempt19-21ksoftirqd/107:59:251
81490,0rcu_preempt19-21ksoftirqd/107:59:251
81490,0rcu_preempt18538-21apt-get12:04:100
9950480,0irq/345-48484004290-1kworker/1:1H10:12:331
81480,0rcu_preempt910-21cyclictest07:14:181
81480,0rcu_preempt19-21ksoftirqd/111:57:091
81480,0rcu_preempt19-21ksoftirqd/111:52:421
81480,0rcu_preempt19-21ksoftirqd/108:19:001
81480,0rcu_preempt19037-21kworker/0:210:29:310
10050480,0irq/346-484840020854-21munin-node0
81470,0rcu_preempt6533-21apt-get11:19:081
81470,0rcu_preempt3-21ksoftirqd/010:57:460
81470,0rcu_preempt3-21ksoftirqd/008:49:210
81470,0rcu_preempt3-21ksoftirqd/007:49:220
81470,0rcu_preempt3-21ksoftirqd/007:49:220
81470,0rcu_preempt30068-21kworker/0:109:35:470
81470,0rcu_preempt19-21ksoftirqd/110:49:191
81470,0rcu_preempt19-21ksoftirqd/108:09:281
81460,0rcu_preempt3-21ksoftirqd/008:25:420
81460,0rcu_preempt3-21ksoftirqd/007:59:120
81460,0rcu_preempt3-21ksoftirqd/007:59:120
81460,0rcu_preempt19-21ksoftirqd/110:07:421
81460,0rcu_preempt19-21ksoftirqd/108:34:211
81460,0rcu_preempt19-21ksoftirqd/107:37:521
10050460,0irq/346-484840019032-1kworker/0:2H10:28:230
81450,0rcu_preempt3-21ksoftirqd/011:43:540
81450,0rcu_preempt3-21ksoftirqd/008:38:210
81450,0rcu_preempt3-21ksoftirqd/007:10:520
81450,0rcu_preempt19-21ksoftirqd/107:59:001
81450,0rcu_preempt19-21ksoftirqd/107:45:111
81450,0rcu_preempt19-21ksoftirqd/107:04:181
10050450,0irq/346-484840011063-21ssh11:56:000
81440,0rcu_preempt3-21ksoftirqd/009:01:210
81440,0rcu_preempt3-21ksoftirqd/008:45:450
81440,0rcu_preempt3-21ksoftirqd/007:17:310
81440,0rcu_preempt19-21ksoftirqd/108:59:141
91199431,0cyclictest4229-21ping07:44:320
81430,0rcu_preempt3-21ksoftirqd/008:54:150
81420,0rcu_preempt4229-21ping07:24:110
81420,0rcu_preempt3-21ksoftirqd/008:39:200
81420,0rcu_preempt3-21ksoftirqd/008:29:190
81420,0rcu_preempt19-21ksoftirqd/107:09:181
81410,0rcu_preempt19-21ksoftirqd/108:49:211
9950390,0irq/345-48484000-21swapper/007:19:350
91199392,0cyclictest4229-21ping07:39:210
81390,0rcu_preempt19-21ksoftirqd/108:39:251
81390,0rcu_preempt19-21ksoftirqd/108:33:171
81380,0rcu_preempt4229-21ping07:29:120
81380,0rcu_preempt19-21ksoftirqd/109:07:341
81380,0rcu_preempt19-21ksoftirqd/108:57:291
81380,0rcu_preempt19-21ksoftirqd/108:48:591
81380,0rcu_preempt14934-21ps07:49:231
81380,0rcu_preempt14934-21ps07:49:231
9950360,0irq/345-484840010781-21munin-run07:38:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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