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2026-05-01 - 08:02

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 792 highest latencies:
System rackaslot5s.osadl.org (updated Fri May 01, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81820,0rcu_preempt19-21ksoftirqd/100:26:251
81810,0rcu_preempt19-21ksoftirqd/122:07:441
81750,0rcu_preempt3-21ksoftirqd/023:47:260
81750,0rcu_preempt3-21ksoftirqd/000:01:430
81740,0rcu_preempt19-21ksoftirqd/121:11:321
81740,0rcu_preempt19-21ksoftirqd/100:20:151
81730,0rcu_preempt19-21ksoftirqd/121:43:041
81710,0rcu_preempt3-21ksoftirqd/023:57:530
81710,0rcu_preempt3-21ksoftirqd/023:31:350
81710,0rcu_preempt19-21ksoftirqd/123:17:551
81700,0rcu_preempt54-21kswapd023:03:220
81700,0rcu_preempt54-21kswapd021:43:230
81700,0rcu_preempt32537-21kworker/1:222:14:061
81700,0rcu_preempt3-21ksoftirqd/000:09:520
81700,0rcu_preempt19-21ksoftirqd/122:34:081
81690,0rcu_preempt3-21ksoftirqd/022:29:300
81680,0rcu_preempt3-21ksoftirqd/021:20:540
81670,0rcu_preempt3-21ksoftirqd/023:49:090
81670,0rcu_preempt3-21ksoftirqd/023:21:530
81670,0rcu_preempt19-21ksoftirqd/123:22:581
81670,0rcu_preempt19-21ksoftirqd/122:48:101
81660,0rcu_preempt32537-21kworker/1:200:12:151
81660,0rcu_preempt3-21ksoftirqd/023:15:100
81640,0rcu_preempt19-21ksoftirqd/120:08:361
9950620,0irq/345-48484000-21swapper/123:13:021
81620,0rcu_preempt19-21ksoftirqd/121:43:431
81620,0rcu_preempt19-21ksoftirqd/121:35:321
81610,0rcu_preempt19-21ksoftirqd/119:38:361
81610,0rcu_preempt19-21ksoftirqd/100:06:171
81590,0rcu_preempt19-21ksoftirqd/123:23:551
9950580,0irq/345-4848400181ktimersoftd/123:49:191
81580,0rcu_preempt3-21ksoftirqd/000:37:480
81580,0rcu_preempt16916-21kworker/0:221:28:400
10050580,0irq/346-484840018293-1kworker/0:4H21:11:130
10050560,0irq/346-4848400181ktimersoftd/100:01:001
10050560,0irq/346-484840012287-1kworker/0:4H23:10:500
81550,0rcu_preempt32537-21kworker/1:219:18:411
81550,0rcu_preempt3-21ksoftirqd/020:03:250
10050550,0irq/346-484840029401-1kworker/0:0H23:38:430
81540,0rcu_preempt19-21ksoftirqd/121:28:441
10050540,0irq/346-484840054-21kswapd022:58:400
10050540,0irq/346-484840017489-1kworker/0:0H22:11:460
9950530,0irq/345-4848400181ktimersoftd/123:40:191
81530,0rcu_preempt3-21ksoftirqd/022:43:330
9950520,0irq/345-484840054-21kswapd023:33:280
81520,0rcu_preempt3-21ksoftirqd/022:38:400
81520,0rcu_preempt3-21ksoftirqd/000:19:450
81520,0rcu_preempt22446-21kworker/0:221:58:410
81520,0rcu_preempt1783-21kworker/0:220:10:160
10050520,0irq/346-484840028767-1kworker/0:1H21:52:300
10050520,0irq/346-484840025198-1kworker/0:0H21:13:350
10050520,0irq/346-484840010185-1kworker/0:1H21:41:250
9950510,0irq/345-484840015915-1kworker/1:2H22:21:451
81510,0rcu_preempt3-21ksoftirqd/022:48:330
81510,0rcu_preempt3-21ksoftirqd/020:18:430
81510,0rcu_preempt19-21ksoftirqd/122:26:401
81510,0rcu_preempt19-21ksoftirqd/100:33:261
81500,0rcu_preempt851-21rngd23:33:221
81500,0rcu_preempt3-21ksoftirqd/021:53:160
81500,0rcu_preempt25673-21kworker/0:319:18:160
81500,0rcu_preempt19-21ksoftirqd/121:14:141
81500,0rcu_preempt19-21ksoftirqd/119:53:311
10050500,0irq/346-48484003540-1kworker/0:0H21:23:580
10050500,0irq/346-48484000-21swapper/022:04:520
81490,0rcu_preempt32537-21kworker/1:220:01:161
81490,0rcu_preempt3-21ksoftirqd/020:16:180
81490,0rcu_preempt29624-21kworker/0:120:00:040
81490,0rcu_preempt19-21ksoftirqd/122:30:431
81490,0rcu_preempt19-21ksoftirqd/121:58:251
81490,0rcu_preempt19-21ksoftirqd/120:03:331
81490,0rcu_preempt19-21ksoftirqd/100:28:371
10050490,0irq/346-48484009008-21ssh00:13:330
10050490,0irq/346-484840027384-1kworker/0:3H22:20:200
10050490,0irq/346-48484000-21swapper/022:27:180
9950480,0irq/345-48484000-21swapper/022:57:060
81480,0rcu_preempt3-21ksoftirqd/020:23:430
81480,0rcu_preempt19-21ksoftirqd/122:08:271
81480,0rcu_preempt19-21ksoftirqd/121:23:271
81480,0rcu_preempt19-21ksoftirqd/120:23:461
81480,0rcu_preempt19-21ksoftirqd/119:37:551
10050480,0irq/346-484840024617-1kworker/0:0H00:03:450
10050480,0irq/346-484840013301-21ssh21:33:330
81470,0rcu_preempt54-21kswapd021:48:401
81470,0rcu_preempt389-21if_eth322:58:361
81470,0rcu_preempt3-21ksoftirqd/023:23:350
81470,0rcu_preempt3-21ksoftirqd/019:57:000
81470,0rcu_preempt29427-21ping20:13:461
81470,0rcu_preempt19-21ksoftirqd/120:18:421
81470,0rcu_preempt19-21ksoftirqd/119:43:351
81470,0rcu_preempt19-21ksoftirqd/119:28:461
81470,0rcu_preempt19-21ksoftirqd/100:13:271
10050470,0irq/346-484840018337-1kworker/0:0H00:25:200
81460,0rcu_preempt3-21ksoftirqd/022:13:400
81460,0rcu_preempt3-21ksoftirqd/020:48:430
81460,0rcu_preempt19-21ksoftirqd/122:49:341
81460,0rcu_preempt19-21ksoftirqd/122:38:261
10050460,0irq/346-484840016537-21ping19:43:530
81450,0rcu_preempt8883-21apt-get20:33:240
81450,0rcu_preempt19-21ksoftirqd/123:03:321
81450,0rcu_preempt19-21ksoftirqd/121:18:361
10050450,0irq/346-484840023584-21ssh00:28:250
81440,0rcu_preempt27529-21awk22:53:291
81440,0rcu_preempt19-21ksoftirqd/123:55:171
81440,0rcu_preempt19-21ksoftirqd/121:53:361
1599440,0migration/08289-21munin-node0
1325199441,0cyclictest16537-21ping19:29:470
131092440,0chrt9931-1kworker/0:1H19:07:010
81430,0rcu_preempt3-21ksoftirqd/020:53:350
81430,0rcu_preempt19-21ksoftirqd/123:28:421
81430,0rcu_preempt19-21ksoftirqd/121:03:271
81430,0rcu_preempt19-21ksoftirqd/120:48:351
81430,0rcu_preempt19-21ksoftirqd/120:34:391
81430,0rcu_preempt13974-21meminfo19:08:371
81430,0rcu_preempt10539-21apt-get20:38:250
10050430,0irq/346-484840027108-21munin-node0
81420,0rcu_preempt3-21ksoftirqd/021:02:210
81420,0rcu_preempt19-21ksoftirqd/123:43:171
81420,0rcu_preempt19-21ksoftirqd/120:58:311
81420,0rcu_preempt19-21ksoftirqd/119:23:381
9950410,0irq/345-48484000-21swapper/019:18:350
81410,0rcu_preempt32537-21kworker/1:220:58:151
81410,0rcu_preempt32537-21kworker/1:220:43:371
81410,0rcu_preempt3-21ksoftirqd/021:05:050
81410,0rcu_preempt3-21ksoftirqd/020:45:510
81410,0rcu_preempt3-21ksoftirqd/020:28:280
81410,0rcu_preempt3-21ksoftirqd/019:38:270
81410,0rcu_preempt3-21ksoftirqd/019:12:480
81410,0rcu_preempt19-21ksoftirqd/120:32:001
81400,0rcu_preempt19-21ksoftirqd/120:38:261
1325199406,0cyclictest0-21swapper/019:33:350
1325199401,0cyclictest16537-21ping19:23:260
81390,0rcu_preempt19-21ksoftirqd/119:04:321
81380,0rcu_preempt19-21ksoftirqd/119:13:301
81370,0rcu_preempt19-21ksoftirqd/119:51:351
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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