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2026-05-06 - 05:05

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 May 06, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81960,0rcu_preempt19-21ksoftirqd/100:18:111
81880,0rcu_preempt19-21ksoftirqd/122:23:311
81840,0rcu_preempt19-21ksoftirqd/122:38:331
81800,0rcu_preempt19-21ksoftirqd/121:18:231
81800,0rcu_preempt19-21ksoftirqd/100:28:381
81790,0rcu_preempt4440-21kworker/0:023:52:170
81790,0rcu_preempt1470-21runrttasks22:21:200
81770,0rcu_preempt3-21ksoftirqd/023:29:580
81760,0rcu_preempt3-21ksoftirqd/023:17:450
81750,0rcu_preempt4440-21kworker/0:000:03:380
81750,0rcu_preempt3914-21kworker/0:100:27:340
81750,0rcu_preempt3-21ksoftirqd/020:42:280
81750,0rcu_preempt3-21ksoftirqd/020:23:460
81750,0rcu_preempt19-21ksoftirqd/120:58:351
81750,0rcu_preempt19199-21kworker/0:121:57:140
81750,0rcu_preempt18767-21kworker/0:223:27:080
81750,0rcu_preempt0-21swapper/021:20:320
81740,0rcu_preempt3-21ksoftirqd/023:43:580
81740,0rcu_preempt3-21ksoftirqd/023:38:290
81740,0rcu_preempt3-21ksoftirqd/023:07:130
81740,0rcu_preempt3-21ksoftirqd/023:01:360
81740,0rcu_preempt3-21ksoftirqd/022:48:420
81740,0rcu_preempt3-21ksoftirqd/022:16:570
81740,0rcu_preempt3-21ksoftirqd/019:57:360
81740,0rcu_preempt3-21ksoftirqd/000:33:390
81740,0rcu_preempt18767-21kworker/0:222:45:350
81740,0rcu_preempt0-21swapper/021:30:450
81730,0rcu_preempt4835-21diskmemload22:39:450
81730,0rcu_preempt4440-21kworker/0:000:00:520
81730,0rcu_preempt3-21ksoftirqd/023:53:160
81730,0rcu_preempt3-21ksoftirqd/023:38:050
81730,0rcu_preempt3-21ksoftirqd/022:08:330
81730,0rcu_preempt3-21ksoftirqd/021:12:340
81730,0rcu_preempt3-21ksoftirqd/020:46:430
81730,0rcu_preempt3-21ksoftirqd/020:20:560
81730,0rcu_preempt26747-21ssh00:13:220
81730,0rcu_preempt19199-21kworker/0:122:24:530
81730,0rcu_preempt15801-21kworker/0:220:13:100
81730,0rcu_preempt1470-21runrttasks22:34:200
81720,0rcu_preempt9791-21kworker/0:022:02:370
81720,0rcu_preempt9791-21kworker/0:022:02:370
81720,0rcu_preempt9791-21kworker/0:021:45:490
81720,0rcu_preempt3-21ksoftirqd/021:33:280
81720,0rcu_preempt3-21ksoftirqd/020:35:350
81720,0rcu_preempt3-21ksoftirqd/019:08:340
81720,0rcu_preempt3-21ksoftirqd/000:28:400
81720,0rcu_preempt3-21ksoftirqd/000:09:330
81710,0rcu_preempt4835-21diskmemload22:55:120
81710,0rcu_preempt3-21ksoftirqd/021:48:360
81710,0rcu_preempt3-21ksoftirqd/021:38:210
81710,0rcu_preempt3-21ksoftirqd/020:08:010
81710,0rcu_preempt3-21ksoftirqd/020:08:010
81710,0rcu_preempt3-21ksoftirqd/019:31:300
81710,0rcu_preempt3-21ksoftirqd/000:20:280
81700,0rcu_preempt4835-21diskmemload22:29:280
81700,0rcu_preempt3-21ksoftirqd/020:17:340
81700,0rcu_preempt3-21ksoftirqd/020:03:060
81700,0rcu_preempt3-21ksoftirqd/019:36:000
81700,0rcu_preempt0-21swapper/022:04:320
81690,0rcu_preempt4835-21diskmemload23:09:040
81690,0rcu_preempt4835-21diskmemload21:25:150
81690,0rcu_preempt4835-21diskmemload21:16:480
81690,0rcu_preempt3-21ksoftirqd/020:50:400
81690,0rcu_preempt3-21ksoftirqd/020:50:400
81690,0rcu_preempt14726-21kworker/0:119:41:100
81680,0rcu_preempt54-21kswapd019:43:420
81680,0rcu_preempt1339-21snmpd20:58:360
81670,0rcu_preempt4835-21diskmemload23:18:440
81670,0rcu_preempt3-21ksoftirqd/019:48:360
81660,0rcu_preempt3-21ksoftirqd/020:28:260
81650,0rcu_preempt3-21ksoftirqd/021:03:380
81650,0rcu_preempt3-21ksoftirqd/020:56:450
81640,0rcu_preempt3-21ksoftirqd/019:19:270
81640,0rcu_preempt3-21ksoftirqd/019:13:340
81640,0rcu_preempt19-21ksoftirqd/121:58:311
81640,0rcu_preempt19-21ksoftirqd/121:58:311
81620,0rcu_preempt3-21ksoftirqd/019:23:310
81620,0rcu_preempt19-21ksoftirqd/123:18:351
81580,0rcu_preempt19-21ksoftirqd/119:28:111
81570,0rcu_preempt26972-21ssh00:13:261
81570,0rcu_preempt19-21ksoftirqd/121:43:301
10050570,0irq/346-484840019-21ksoftirqd/122:08:331
81560,0rcu_preempt19-21ksoftirqd/121:23:411
81560,0rcu_preempt19-21ksoftirqd/100:08:211
13250530,0irq/301-480200054-21kswapd022:29:511
10050530,0irq/346-484840054-21kswapd000:36:211
10050510,0irq/346-484840054-21kswapd000:06:511
81500,0rcu_preempt19-21ksoftirqd/122:47:111
81500,0rcu_preempt19-21ksoftirqd/121:33:221
9950490,0irq/345-484840081rcu_preempt20:45:471
10050490,0irq/346-484840054-21kswapd022:59:031
10050490,0irq/346-484840054-21kswapd019:53:101
10050490,0irq/346-484840024096-21cron20:28:101
9950480,0irq/345-4848400181ktimersoftd/122:22:181
10050480,0irq/346-484840054-21kswapd023:10:021
81470,0rcu_preempt3-21ksoftirqd/019:03:380
81470,0rcu_preempt3-21ksoftirqd/019:03:380
81470,0rcu_preempt19-21ksoftirqd/122:33:391
10050470,0irq/346-484840054-21kswapd021:55:001
9950460,0irq/345-484840011810-21ssh22:53:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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