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2026-06-11 - 09:31

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 Thu Jun 11, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81930,0rcu_preempt3-21ksoftirqd/021:32:460
81910,0rcu_preempt3-21ksoftirqd/023:57:560
81870,0rcu_preempt3-21ksoftirqd/021:52:520
81870,0rcu_preempt18493-21apt-get19:57:470
81850,0rcu_preempt3-21ksoftirqd/023:13:010
81850,0rcu_preempt3-21ksoftirqd/021:17:360
81820,0rcu_preempt3-21ksoftirqd/022:58:030
81820,0rcu_preempt3-21ksoftirqd/000:22:590
81800,0rcu_preempt3-21ksoftirqd/023:38:030
81790,0rcu_preempt54-21kswapd021:10:150
10050780,0irq/346-4848400171rcuc/100:22:211
10050770,0irq/346-4848400181ktimersoftd/123:39:201
81760,0rcu_preempt3-21ksoftirqd/022:43:060
81750,0rcu_preempt3-21ksoftirqd/023:10:530
81740,0rcu_preempt3-21ksoftirqd/022:27:560
81740,0rcu_preempt3-21ksoftirqd/022:05:550
81740,0rcu_preempt3-21ksoftirqd/020:23:050
10050740,0irq/346-4848400181ktimersoftd/100:35:041
81730,0rcu_preempt3-21ksoftirqd/022:01:250
81720,0rcu_preempt3-21ksoftirqd/023:17:500
81710,0rcu_preempt3-21ksoftirqd/020:44:570
81710,0rcu_preempt3-21ksoftirqd/000:06:310
9950700,0irq/345-4848400181ktimersoftd/121:25:011
81700,0rcu_preempt3-21ksoftirqd/023:49:120
81700,0rcu_preempt3-21ksoftirqd/023:07:050
81700,0rcu_preempt3-21ksoftirqd/022:56:530
81700,0rcu_preempt3-21ksoftirqd/021:28:380
81690,0rcu_preempt3-21ksoftirqd/022:22:570
81690,0rcu_preempt3-21ksoftirqd/021:24:350
81690,0rcu_preempt3-21ksoftirqd/000:16:450
81690,0rcu_preempt28318-21kworker/0:120:28:040
81680,0rcu_preempt3-21ksoftirqd/022:47:500
81680,0rcu_preempt3-21ksoftirqd/022:07:560
81670,0rcu_preempt3-21ksoftirqd/023:42:550
81670,0rcu_preempt3-21ksoftirqd/023:29:420
81670,0rcu_preempt3-21ksoftirqd/021:49:220
81670,0rcu_preempt3-21ksoftirqd/021:49:220
81670,0rcu_preempt3-21ksoftirqd/020:48:020
81670,0rcu_preempt3-21ksoftirqd/020:20:320
81670,0rcu_preempt3-21ksoftirqd/000:17:550
81650,0rcu_preempt3-21ksoftirqd/019:26:300
81640,0rcu_preempt4337-21df_inode20:52:500
81640,0rcu_preempt3-21ksoftirqd/023:23:010
81640,0rcu_preempt3-21ksoftirqd/022:38:320
81640,0rcu_preempt3-21ksoftirqd/021:41:230
81640,0rcu_preempt3-21ksoftirqd/021:16:320
81630,0rcu_preempt5367-21kworker/0:019:42:430
81630,0rcu_preempt3-21ksoftirqd/020:12:580
81630,0rcu_preempt3-21ksoftirqd/020:02:580
81620,0rcu_preempt3-21ksoftirqd/019:07:540
81620,0rcu_preempt3-21ksoftirqd/000:35:280
10050610,0irq/346-484840021127-1kworker/1:3H22:28:291
10050610,0irq/346-484840016425-1kworker/1:0H21:18:461
81600,0rcu_preempt3-21ksoftirqd/023:33:050
10050600,0irq/346-48484008613-1kworker/1:1H22:54:111
9950590,0irq/345-4848400181ktimersoftd/123:05:491
81590,0rcu_preempt3-21ksoftirqd/019:47:550
10050590,0irq/346-48484006180-1kworker/1:1H22:35:431
10050590,0irq/346-48484006040-1kworker/1:1H23:16:471
10050590,0irq/346-484840054-21kswapd022:07:451
10050590,0irq/346-48484003632-1kworker/1:0H22:49:041
10050590,0irq/346-484840016425-1kworker/1:0H21:15:481
81570,0rcu_preempt3-21ksoftirqd/020:07:540
10050570,0irq/346-4848400851-21rngd22:15:150
10050570,0irq/346-484840013379-1kworker/1:2H23:58:191
10050570,0irq/346-484840010636-1kworker/1:2H00:27:171
10050560,0irq/346-48484006180-1kworker/1:1H22:19:301
10050560,0irq/346-484840028502-1kworker/1:0H23:08:111
10050550,0irq/346-484840023318-1kworker/1:1H00:05:251
81540,0rcu_preempt3-21ksoftirqd/021:43:160
81540,0rcu_preempt28598-21apt-get22:32:450
81540,0rcu_preempt15215-21ssh00:29:270
10050540,0irq/346-48484008421-1kworker/1:3H23:54:361
10050540,0irq/346-484840031968-21ssh22:02:571
10050540,0irq/346-484840018555-1kworker/1:0H22:59:061
10050540,0irq/346-484840016000-1kworker/1:1H23:26:251
81530,0rcu_preempt3-21ksoftirqd/022:17:560
81530,0rcu_preempt3-21ksoftirqd/021:03:010
81530,0rcu_preempt3-21ksoftirqd/019:32:490
10050530,0irq/346-484840054-21kswapd023:36:441
10050530,0irq/346-48484003481-1kworker/1:2H23:46:011
81520,0rcu_preempt3-21ksoftirqd/023:56:130
10050520,0irq/346-48484008421-1kworker/1:3H23:51:361
10050520,0irq/346-48484006182-1kworker/1:3H22:16:361
10050520,0irq/346-484840023717-1kworker/1:0H21:56:301
10050520,0irq/346-484840016397-21rm00:31:011
10050520,0irq/346-484840013816-1kworker/1:0H21:49:291
10050520,0irq/346-484840013816-1kworker/1:0H21:49:291
81510,0rcu_preempt3-21ksoftirqd/019:52:550
81510,0rcu_preempt3-21ksoftirqd/019:27:390
81510,0rcu_preempt3-21ksoftirqd/019:18:220
10050510,0irq/346-484840054-21kswapd023:19:571
10050510,0irq/346-48484003633-1kworker/1:3H22:42:131
10050510,0irq/346-484840016425-1kworker/1:0H21:29:131
81500,0rcu_preempt3-21ksoftirqd/000:08:530
10050500,0irq/346-48484003392-21ssh21:33:501
10050500,0irq/346-484840023318-1kworker/1:1H00:08:231
81490,0rcu_preempt31629-21apt-get20:37:460
10050490,0irq/346-48484008613-1kworker/1:1H22:45:441
10050490,0irq/346-4848400678-1kworker/1:2H00:15:491
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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