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2026-08-11 - 23:17

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 Tue Aug 11, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811010,0rcu_preempt19-21ksoftirqd/107:45:181
81820,0rcu_preempt19-21ksoftirqd/107:19:511
10050820,0irq/346-4848400181ktimersoftd/110:03:031
10050820,0irq/346-4848400181ktimersoftd/110:03:031
81770,0rcu_preempt19-21ksoftirqd/112:24:101
10050760,0irq/346-484840054-21kswapd010:36:220
10050760,0irq/346-4848400171rcuc/111:48:501
9950750,0irq/345-4848400171rcuc/111:39:361
81750,0rcu_preempt19-21ksoftirqd/108:11:281
10050740,0irq/346-484840054-21kswapd011:08:570
10050740,0irq/346-484840020936-1kworker/0:2H09:48:210
81720,0rcu_preempt19-21ksoftirqd/110:23:041
81710,0rcu_preempt54-21kswapd010:31:281
81710,0rcu_preempt29449-21kworker/1:011:23:421
81710,0rcu_preempt19-21ksoftirqd/109:33:531
81710,0rcu_preempt0-21swapper/109:25:421
81700,0rcu_preempt32658-21kworker/u4:111:17:231
81700,0rcu_preempt3-21ksoftirqd/010:22:020
81700,0rcu_preempt19-21ksoftirqd/108:24:351
10050700,0irq/346-484840054-21kswapd011:50:430
10050700,0irq/346-48484001777-1kworker/0:3H12:21:370
81690,0rcu_preempt0-21swapper/109:44:581
81680,0rcu_preempt19-21ksoftirqd/112:37:081
81670,0rcu_preempt29449-21kworker/1:009:57:171
81670,0rcu_preempt19-21ksoftirqd/111:11:021
10050670,0irq/346-484840015110-1kworker/0:2H11:58:490
10050670,0irq/346-484840015110-1kworker/0:2H11:58:490
81660,0rcu_preempt54-21kswapd009:31:100
81660,0rcu_preempt3-21ksoftirqd/011:11:290
81660,0rcu_preempt25704-21ping08:10:080
81660,0rcu_preempt19-21ksoftirqd/112:08:111
81660,0rcu_preempt19-21ksoftirqd/110:57:021
81660,0rcu_preempt19-21ksoftirqd/109:17:541
81650,0rcu_preempt3-21ksoftirqd/010:04:250
81650,0rcu_preempt3-21ksoftirqd/010:04:250
81640,0rcu_preempt19-21ksoftirqd/112:31:231
81640,0rcu_preempt19-21ksoftirqd/111:52:251
81640,0rcu_preempt19-21ksoftirqd/109:35:031
81640,0rcu_preempt19-21ksoftirqd/109:23:151
81640,0rcu_preempt19-21ksoftirqd/109:11:111
81630,0rcu_preempt3-21ksoftirqd/009:59:490
81630,0rcu_preempt19-21ksoftirqd/112:18:381
81630,0rcu_preempt19-21ksoftirqd/111:44:001
81630,0rcu_preempt19-21ksoftirqd/110:45:231
81630,0rcu_preempt19-21ksoftirqd/110:45:231
81630,0rcu_preempt1034-21avahi-daemon10:53:151
10050630,0irq/346-484840032642-1kworker/0:0H11:37:240
81620,0rcu_preempt19-21ksoftirqd/112:00:261
81620,0rcu_preempt1324-21snmpd08:30:351
81610,0rcu_preempt3-21ksoftirqd/011:44:400
81610,0rcu_preempt3-21ksoftirqd/011:26:120
81610,0rcu_preempt19-21ksoftirqd/110:19:181
81610,0rcu_preempt19-21ksoftirqd/110:06:401
81610,0rcu_preempt0-21swapper/111:26:161
10050610,0irq/346-484840020403-1kworker/0:2H10:54:510
9950600,0irq/345-484840012821-1kworker/0:0H11:19:500
81600,0rcu_preempt19-21ksoftirqd/112:26:451
81600,0rcu_preempt19-21ksoftirqd/111:56:041
81600,0rcu_preempt19-21ksoftirqd/111:56:041
81600,0rcu_preempt19-21ksoftirqd/111:31:531
81600,0rcu_preempt19-21ksoftirqd/111:02:001
81600,0rcu_preempt19-21ksoftirqd/110:36:091
81600,0rcu_preempt19-21ksoftirqd/110:26:531
81600,0rcu_preempt19-21ksoftirqd/110:10:261
81600,0rcu_preempt19-21ksoftirqd/109:54:221
81600,0rcu_preempt19-21ksoftirqd/108:26:321
81590,0rcu_preempt19-21ksoftirqd/111:05:291
81590,0rcu_preempt19-21ksoftirqd/109:40:161
81590,0rcu_preempt19-21ksoftirqd/107:39:201
10050590,0irq/346-484840011015-1kworker/0:3H09:40:410
81580,0rcu_preempt30133-1kworker/1:0H08:14:521
81580,0rcu_preempt19-21ksoftirqd/107:50:131
10050570,0irq/346-48484001777-1kworker/0:3H12:11:230
10050570,0irq/346-48484001777-1kworker/0:3H12:11:230
81560,0rcu_preempt19-21ksoftirqd/108:08:221
81560,0rcu_preempt19-21ksoftirqd/108:08:221
81560,0rcu_preempt19-21ksoftirqd/108:01:501
81550,0rcu_preempt8180-21apt-get10:40:001
81550,0rcu_preempt3-21ksoftirqd/010:40:150
81540,0rcu_preempt9488-21df_abs07:10:021
81540,0rcu_preempt19-21ksoftirqd/112:10:101
81540,0rcu_preempt19-21ksoftirqd/112:10:101
10050540,0irq/346-4848400836-21rngd11:45:460
10050540,0irq/346-484840027681-1kworker/0:1H11:34:440
81530,0rcu_preempt3-21ksoftirqd/008:25:020
81530,0rcu_preempt19-21ksoftirqd/109:00:081
81530,0rcu_preempt19-21ksoftirqd/108:55:051
81530,0rcu_preempt19-21ksoftirqd/108:50:031
81530,0rcu_preempt14145-21kworker/0:209:09:490
10050530,0irq/346-484840013998-21ssh10:45:150
10050530,0irq/346-484840013998-21ssh10:45:150
81520,0rcu_preempt3-21ksoftirqd/008:05:060
81520,0rcu_preempt3-21ksoftirqd/008:05:060
81520,0rcu_preempt12530-21kworker/0:111:18:390
10050520,0irq/346-484840022399-1kworker/0:1H12:32:300
81510,0rcu_preempt3-21ksoftirqd/008:20:020
81510,0rcu_preempt19-21ksoftirqd/108:45:021
81510,0rcu_preempt19-21ksoftirqd/108:40:121
10050510,0irq/346-48484007500-1kworker/0:2H12:17:490
10050510,0irq/346-484840054-21kswapd010:11:540
10050510,0irq/346-484840016135-21diskmemload09:15:140
9950500,0irq/345-484840020071-1kworker/0:0H12:00:540
81500,0rcu_preempt3-21ksoftirqd/012:05:170
81500,0rcu_preempt3-21ksoftirqd/010:05:100
81500,0rcu_preempt19-21ksoftirqd/109:05:091
81500,0rcu_preempt19-21ksoftirqd/107:55:141
81500,0rcu_preempt19-21ksoftirqd/107:15:051
10050500,0irq/346-4848400588-1kworker/0:3H10:34:220
10050500,0irq/346-48484000-21swapper/012:28:560
9950490,0irq/345-484840012439-21ping07:39:500
81490,0rcu_preempt3-21ksoftirqd/010:25:160
81490,0rcu_preempt19-21ksoftirqd/107:09:491
9950480,0irq/345-48484001060-1kworker/0:0H09:26:480
81480,0rcu_preempt3-21ksoftirqd/012:39:490
81480,0rcu_preempt3-21ksoftirqd/008:29:490
81480,0rcu_preempt3-21ksoftirqd/008:14:490
10050480,0irq/346-484840012439-21ping07:41:151
81470,0rcu_preempt54-21kswapd007:34:590
81470,0rcu_preempt3-21ksoftirqd/010:15:150
81470,0rcu_preempt3-21ksoftirqd/007:05:050
81470,0rcu_preempt19-21ksoftirqd/108:35:081
81470,0rcu_preempt12439-21ping07:25:171
10050470,0irq/346-484840054-21kswapd011:00:180
10050470,0irq/346-484840023715-21aten_rapower_en09:50:020
9950460,0irq/345-484840012439-21ping07:19:500
9950450,0irq/345-484840012439-21ping07:19:510
81450,0rcu_preempt19-21ksoftirqd/107:31:201
81440,0rcu_preempt3-21ksoftirqd/010:50:120
81440,0rcu_preempt3-21ksoftirqd/009:24:140
81440,0rcu_preempt14145-21kworker/0:209:02:300
10050440,0irq/346-48484006134-21dropbear08:38:290
9950420,0irq/345-484840011015-1kworker/0:3H09:39:220
915999412,0cyclictest12439-21ping07:25:210
915999412,0cyclictest0-21swapper/007:47:070
81410,0rcu_preempt9928-21munin-node0
81410,0rcu_preempt3-21ksoftirqd/008:00:030
9950400,0irq/345-48484000-21swapper/008:55:060
10050400,0irq/346-484840022424-21munin-node0
10050400,0irq/346-484840010729-21runrttasks07:14:150
9950390,0irq/345-484840025640-21date07:59:490
81390,0rcu_preempt3-21ksoftirqd/009:05:010
81390,0rcu_preempt3-21ksoftirqd/008:45:120
81390,0rcu_preempt3-21ksoftirqd/007:30:130
81380,0rcu_preempt3-21ksoftirqd/008:40:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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