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2026-03-25 - 12:20

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 Wed Mar 25, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81790,0rcu_preempt19-21ksoftirqd/123:08:511
81760,0rcu_preempt3-21ksoftirqd/021:17:320
81750,0rcu_preempt28907-21kworker/0:123:36:450
81750,0rcu_preempt16433-21kworker/0:000:20:100
81750,0rcu_preempt16433-21kworker/0:000:20:100
81740,0rcu_preempt5422-21kworker/0:021:29:120
81740,0rcu_preempt3-21ksoftirqd/022:14:180
81740,0rcu_preempt3-21ksoftirqd/019:39:230
81740,0rcu_preempt3182-21kworker/0:120:09:230
81740,0rcu_preempt19642-21kworker/0:119:34:050
81740,0rcu_preempt12219-21kworker/0:222:20:350
81730,0rcu_preempt3-21ksoftirqd/022:34:200
81730,0rcu_preempt24288-21kworker/0:221:44:040
81720,0rcu_preempt3-21ksoftirqd/021:51:050
81720,0rcu_preempt3-21ksoftirqd/019:54:070
81720,0rcu_preempt3182-21kworker/0:121:39:340
81720,0rcu_preempt19-21ksoftirqd/122:59:191
81720,0rcu_preempt16433-21kworker/0:000:33:280
81720,0rcu_preempt12213-21kworker/0:023:59:090
81720,0rcu_preempt0-21swapper/021:25:490
81710,0rcu_preempt6305-21kworker/0:122:30:490
81710,0rcu_preempt3-21ksoftirqd/023:12:250
81710,0rcu_preempt28907-21kworker/0:123:40:100
81710,0rcu_preempt20870-21kworker/0:221:09:180
81710,0rcu_preempt19-21ksoftirqd/100:09:101
81710,0rcu_preempt19-21ksoftirqd/100:09:101
81710,0rcu_preempt16338-21kworker/0:021:35:000
81710,0rcu_preempt12212-21kworker/0:020:49:150
81700,0rcu_preempt851-21rngd19:09:110
81700,0rcu_preempt3-21ksoftirqd/023:57:270
81700,0rcu_preempt3-21ksoftirqd/023:03:420
81700,0rcu_preempt3-21ksoftirqd/021:57:310
81700,0rcu_preempt3-21ksoftirqd/020:59:100
81700,0rcu_preempt3-21ksoftirqd/000:37:100
81700,0rcu_preempt19642-21kworker/0:119:28:330
81700,0rcu_preempt15383-21kworker/0:022:41:110
81700,0rcu_preempt12219-21kworker/0:222:08:510
81690,0rcu_preempt3-21ksoftirqd/023:53:290
81690,0rcu_preempt3-21ksoftirqd/022:07:470
81690,0rcu_preempt0-21swapper/023:22:400
81680,0rcu_preempt6305-21kworker/0:122:02:180
81680,0rcu_preempt6276-21ssh23:04:070
81680,0rcu_preempt3-21ksoftirqd/021:20:200
81680,0rcu_preempt3-21ksoftirqd/020:19:160
81680,0rcu_preempt27125-21ssh23:24:360
81680,0rcu_preempt27125-21ssh23:24:360
81680,0rcu_preempt0-21swapper/023:46:270
81670,0rcu_preempt3-21ksoftirqd/022:44:030
81670,0rcu_preempt3-21ksoftirqd/019:29:080
81670,0rcu_preempt32157-21ping20:13:530
81670,0rcu_preempt23870-21ssh00:28:250
81660,0rcu_preempt3-21ksoftirqd/023:30:140
81660,0rcu_preempt3-21ksoftirqd/022:52:540
81660,0rcu_preempt3-21ksoftirqd/022:27:240
81660,0rcu_preempt3-21ksoftirqd/019:49:110
81660,0rcu_preempt3-21ksoftirqd/000:09:180
81660,0rcu_preempt3-21ksoftirqd/000:09:180
81660,0rcu_preempt19-21ksoftirqd/122:09:121
81650,0rcu_preempt3-21ksoftirqd/023:14:560
81650,0rcu_preempt3-21ksoftirqd/022:54:000
81650,0rcu_preempt3-21ksoftirqd/000:14:090
81650,0rcu_preempt3-21ksoftirqd/000:06:230
81650,0rcu_preempt19-21ksoftirqd/123:59:141
81640,0rcu_preempt3-21ksoftirqd/020:39:090
81630,0rcu_preempt9204-21timerwakeupswit20:24:190
81630,0rcu_preempt3-21ksoftirqd/021:04:180
81630,0rcu_preempt3-21ksoftirqd/020:54:140
81630,0rcu_preempt3-21ksoftirqd/020:04:120
81630,0rcu_preempt3-21ksoftirqd/019:47:230
81630,0rcu_preempt3-21ksoftirqd/019:14:160
81620,0rcu_preempt3-21ksoftirqd/019:59:190
81620,0rcu_preempt15074-21dropbear20:44:050
9950610,0irq/345-4848400181ktimersoftd/123:30:411
81610,0rcu_preempt54-21kswapd019:23:040
81610,0rcu_preempt3-21ksoftirqd/020:34:140
81590,0rcu_preempt3-21ksoftirqd/020:29:040
81570,0rcu_preempt25962-1kworker/1:1H22:52:251
10050550,0irq/346-484840017189-1kworker/1:0H00:24:491
9950530,0irq/345-4848400181ktimersoftd/123:17:361
10050520,0irq/346-4848400733-21ssh22:58:501
10050520,0irq/346-484840054-21kswapd022:00:071
10050520,0irq/346-484840027156-1kworker/1:2H21:46:521
9950500,0irq/345-4848400851-21rngd00:34:071
81500,0rcu_preempt3-21ksoftirqd/019:04:100
10050500,0irq/346-484840030211-21idleruntime21:49:081
9950480,0irq/345-4848400144502chrt22:05:561
10050470,0irq/346-484840054-21kswapd021:41:081
10050460,0irq/346-484840054-21kswapd000:20:191
10050460,0irq/346-484840054-21kswapd000:20:191
10050460,0irq/346-484840028884-1kworker/1:3H22:23:331
81450,0rcu_preempt19-21ksoftirqd/119:06:501
10050450,0irq/346-48484005490-21seq21:24:021
9950440,0irq/345-484840054-21kswapd020:24:121
81440,0rcu_preempt19-21ksoftirqd/123:49:011
10050440,0irq/346-48484002686-1kworker/1:2H21:23:301
10050440,0irq/346-484840019229-21ping19:44:101
10050440,0irq/346-484840018225-1kworker/1:1H23:21:021
10050430,0irq/346-48484002454-1kworker/1:2H00:15:371
10050430,0irq/346-48484000-21swapper/121:13:211
10050420,0irq/346-484840022046-1kworker/1:2H00:30:571
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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