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2026-01-12 - 03:40

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Mon Jan 12, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811310,0rcu_preempt3-21ksoftirqd/019:20:010
811230,0rcu_preempt19-21ksoftirqd/121:11:031
811180,0rcu_preempt19-21ksoftirqd/122:40:071
10050810,0irq/346-4848400111rcuc/022:25:010
81780,0rcu_preempt19-21ksoftirqd/123:55:091
2139099677,0cyclictest0-21swapper/023:45:510
81660,0rcu_preempt3-21ksoftirqd/019:25:110
81660,0rcu_preempt3-21ksoftirqd/000:10:190
10050640,0irq/346-484840041ktimersoftd/023:43:000
2139099621,0cyclictest0-21swapper/022:46:290
81610,0rcu_preempt26062-1kworker/0:2H19:39:580
81610,0rcu_preempt19-21ksoftirqd/121:32:081
81600,0rcu_preempt19-21ksoftirqd/122:18:291
2139099609,0cyclictest0-21swapper/022:05:160
81590,0rcu_preempt3-21ksoftirqd/021:20:080
2139099591,0cyclictest24719-21sed19:19:590
2139099581,0cyclictest31358-21sort19:40:010
81570,0rcu_preempt3-21ksoftirqd/020:25:010
10050560,0irq/346-48484000-21swapper/021:19:500
81550,0rcu_preempt19-21ksoftirqd/100:18:321
10050550,0irq/346-484840022049-1kworker/0:3H22:41:440
81540,0rcu_preempt3-21ksoftirqd/023:53:350
81540,0rcu_preempt3-21ksoftirqd/022:00:280
81540,0rcu_preempt3-21ksoftirqd/021:47:270
81540,0rcu_preempt19-21ksoftirqd/123:05:091
10050540,0irq/346-48484000-21swapper/100:27:111
10050540,0irq/346-48484000-21swapper/021:44:010
10050540,0irq/346-48484000-21swapper/021:28:400
81530,0rcu_preempt3-21ksoftirqd/022:35:180
81530,0rcu_preempt3-21ksoftirqd/021:51:520
10050530,0irq/346-484840029336-21ssh21:43:321
10050530,0irq/346-48484000-21swapper/021:31:260
81520,0rcu_preempt3-21ksoftirqd/022:53:590
81520,0rcu_preempt3-21ksoftirqd/000:35:120
10050520,0irq/346-4848400851-21rngd23:04:590
81510,0rcu_preempt3-21ksoftirqd/023:39:110
81510,0rcu_preempt3-21ksoftirqd/022:56:370
81510,0rcu_preempt3-21ksoftirqd/021:37:190
81510,0rcu_preempt3-21ksoftirqd/021:37:190
81510,0rcu_preempt3-21ksoftirqd/000:30:090
81510,0rcu_preempt19-21ksoftirqd/122:00:111
10050510,0irq/346-484840019-21ksoftirqd/123:29:121
81500,0rcu_preempt5166-21ping20:09:210
81500,0rcu_preempt3-21ksoftirqd/023:56:490
81500,0rcu_preempt19-21ksoftirqd/123:35:101
81500,0rcu_preempt19-21ksoftirqd/122:45:161
81500,0rcu_preempt19-21ksoftirqd/119:10:101
10050500,0irq/346-4848400851-21rngd00:19:030
10050500,0irq/346-484840054-21kswapd000:39:411
10050500,0irq/346-484840022700-21ssh21:36:121
10050500,0irq/346-484840022700-21ssh21:36:121
10050500,0irq/346-484840013962-21ssh23:40:041
10050500,0irq/346-48484000-21swapper/023:00:510
10050500,0irq/346-48484000-21swapper/021:55:080
81490,0rcu_preempt3-21ksoftirqd/020:15:210
81490,0rcu_preempt3-21ksoftirqd/020:14:290
81490,0rcu_preempt3-21ksoftirqd/020:14:290
81490,0rcu_preempt3-21ksoftirqd/020:01:370
81490,0rcu_preempt3-21ksoftirqd/000:28:290
81490,0rcu_preempt3-21ksoftirqd/000:22:230
81490,0rcu_preempt19-21ksoftirqd/123:31:411
81490,0rcu_preempt19-21ksoftirqd/120:25:221
81490,0rcu_preempt19-21ksoftirqd/120:00:271
81490,0rcu_preempt19-21ksoftirqd/119:05:161
81490,0rcu_preempt12335-21ssh22:31:470
81490,0rcu_preempt0-21swapper/120:12:421
81490,0rcu_preempt0-21swapper/120:12:421
10050490,0irq/346-484840030745-21ssh23:24:030
10050490,0irq/346-484840019937-21ssh22:06:311
10050490,0irq/346-484840015718-21ssh21:29:581
10050490,0irq/346-484840013917-21ssh00:12:361
81480,0rcu_preempt8198-21date23:00:261
81480,0rcu_preempt26037-21kworker/0:121:06:150
81480,0rcu_preempt19-21ksoftirqd/122:25:191
81480,0rcu_preempt19-21ksoftirqd/120:15:271
81480,0rcu_preempt19-21ksoftirqd/120:05:181
81480,0rcu_preempt19-21ksoftirqd/119:38:571
10250480,0irq/333-mmc018274-1kworker/1:0H00:19:591
10050480,0irq/346-484840024071-1kworker/1:1H23:20:051
10050480,0irq/346-48484001944-21ssh22:21:051
10050480,0irq/346-48484000-21swapper/000:04:410
81470,0rcu_preempt3-21ksoftirqd/022:23:120
81470,0rcu_preempt3-21ksoftirqd/022:19:010
81470,0rcu_preempt3-21ksoftirqd/019:05:230
81470,0rcu_preempt19-21ksoftirqd/123:46:231
81470,0rcu_preempt19-21ksoftirqd/122:11:361
81470,0rcu_preempt19-21ksoftirqd/120:45:071
81470,0rcu_preempt19-21ksoftirqd/120:20:161
81470,0rcu_preempt19-21ksoftirqd/119:58:441
81470,0rcu_preempt19-21ksoftirqd/119:20:001
81470,0rcu_preempt1663-21if_err_eth000:00:191
10050470,0irq/346-484840032521-21ssh22:52:311
10050470,0irq/346-48484001758-21runrttasks21:15:181
10050470,0irq/346-484840012585-21ssh22:32:071
9950460,0irq/345-48484006657-21if_eth100:05:181
81460,0rcu_preempt3-21ksoftirqd/023:16:070
81460,0rcu_preempt3-21ksoftirqd/020:50:170
81460,0rcu_preempt3-21ksoftirqd/020:36:550
81460,0rcu_preempt3-21ksoftirqd/019:10:190
81460,0rcu_preempt28957-21kworker/1:119:31:061
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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