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2025-10-20 - 18:02

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 highest latencies:
System rackaslot5s.osadl.org (updated Mon Oct 20, 2025 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81910,0rcu_preempt19-21ksoftirqd/123:25:281
81910,0rcu_preempt19-21ksoftirqd/123:25:281
81900,0rcu_preempt19-21ksoftirqd/122:13:191
81860,0rcu_preempt54-21kswapd022:47:101
81840,0rcu_preempt0-21swapper/122:35:411
81820,0rcu_preempt5358-21munin-node1
81820,0rcu_preempt19-21ksoftirqd/123:35:521
81800,0rcu_preempt3-21ksoftirqd/022:03:030
81790,0rcu_preempt19-21ksoftirqd/123:17:311
81760,0rcu_preempt54-21kswapd023:01:421
81760,0rcu_preempt3-21ksoftirqd/021:10:530
81730,0rcu_preempt824-21diskmemload23:20:271
81730,0rcu_preempt3-21ksoftirqd/023:24:130
81720,0rcu_preempt3-21ksoftirqd/023:43:240
81720,0rcu_preempt19-21ksoftirqd/123:09:121
81720,0rcu_preempt19-21ksoftirqd/123:09:121
81710,0rcu_preempt3-21ksoftirqd/000:25:390
81700,0rcu_preempt3-21ksoftirqd/022:46:300
81700,0rcu_preempt3-21ksoftirqd/021:26:160
81690,0rcu_preempt3-21ksoftirqd/022:08:550
81690,0rcu_preempt3-21ksoftirqd/000:14:160
81670,0rcu_preempt3-21ksoftirqd/022:42:290
81670,0rcu_preempt3-21ksoftirqd/022:42:290
81670,0rcu_preempt3-21ksoftirqd/021:55:480
81670,0rcu_preempt3-21ksoftirqd/021:35:410
81670,0rcu_preempt19-21ksoftirqd/123:56:361
81670,0rcu_preempt19-21ksoftirqd/121:38:151
81660,0rcu_preempt19-21ksoftirqd/123:54:021
81660,0rcu_preempt19-21ksoftirqd/122:30:241
81660,0rcu_preempt19-21ksoftirqd/121:20:371
81650,0rcu_preempt4612-21ssh21:09:121
81640,0rcu_preempt26195-21cyclictest23:50:100
81640,0rcu_preempt19-21ksoftirqd/123:45:451
81640,0rcu_preempt19-21ksoftirqd/121:42:271
81640,0rcu_preempt13653-21munin-node1
81630,0rcu_preempt31502-21diskstats19:20:321
81630,0rcu_preempt19-21ksoftirqd/100:28:331
81620,0rcu_preempt20419-21kworker/0:123:13:050
81620,0rcu_preempt19-21ksoftirqd/121:11:371
81620,0rcu_preempt19-21ksoftirqd/100:20:091
81610,0rcu_preempt3-21ksoftirqd/000:00:230
81610,0rcu_preempt19-21ksoftirqd/122:43:491
81610,0rcu_preempt19-21ksoftirqd/122:43:491
81610,0rcu_preempt19-21ksoftirqd/122:16:471
81600,0rcu_preempt19-21ksoftirqd/122:51:381
81600,0rcu_preempt19-21ksoftirqd/122:29:301
81590,0rcu_preempt3-21ksoftirqd/021:06:000
10050590,0irq/346-48484000-21swapper/121:54:041
81580,0rcu_preempt19-21ksoftirqd/122:58:071
10050580,0irq/346-484840011958-21ssh21:17:131
10050580,0irq/346-484840011720-21ssh23:10:231
81570,0rcu_preempt3-21ksoftirqd/000:21:550
81570,0rcu_preempt3-21ksoftirqd/000:21:550
81570,0rcu_preempt19-21ksoftirqd/122:01:441
9950560,0irq/345-484840024809-1kworker/1:0H21:33:101
10050560,0irq/346-484840012091-1kworker/0:2H22:35:010
10050560,0irq/346-48484000-21swapper/121:25:381
9950550,0irq/345-4848400171rcuc/100:05:441
81550,0rcu_preempt9855-21ping20:15:410
81550,0rcu_preempt3-21ksoftirqd/020:15:010
81550,0rcu_preempt3-21ksoftirqd/000:30:340
81540,0rcu_preempt7746-21kworker/0:321:16:160
81540,0rcu_preempt3-21ksoftirqd/022:10:230
10050540,0irq/346-48484005405-1kworker/0:2H21:49:010
10050540,0irq/346-48484000-21swapper/100:23:061
10050540,0irq/346-48484000-21swapper/100:23:061
9950530,0irq/345-4848400171rcuc/100:12:471
81530,0rcu_preempt771-21kworker/0:222:36:160
81530,0rcu_preempt3-21ksoftirqd/020:40:280
81530,0rcu_preempt3-21ksoftirqd/019:45:220
10050530,0irq/346-48484000-21swapper/100:32:311
9950520,0irq/345-4848400171rcuc/120:40:381
81520,0rcu_preempt3-21ksoftirqd/021:51:190
81520,0rcu_preempt3-21ksoftirqd/020:35:280
81520,0rcu_preempt3-21ksoftirqd/019:50:380
81520,0rcu_preempt30598-21taskset00:09:370
81520,0rcu_preempt26849-21apt-get22:50:220
10050520,0irq/346-48484005190-1kworker/0:1H23:04:190
81510,0rcu_preempt3-21ksoftirqd/023:08:180
81510,0rcu_preempt3-21ksoftirqd/023:08:180
81510,0rcu_preempt3-21ksoftirqd/022:57:110
81510,0rcu_preempt3-21ksoftirqd/020:05:290
81510,0rcu_preempt3-21ksoftirqd/020:00:320
9950500,0irq/345-48484000-21swapper/121:48:231
81500,0rcu_preempt32359-21kworker/0:119:21:060
81500,0rcu_preempt3-21ksoftirqd/023:55:390
81500,0rcu_preempt3-21ksoftirqd/023:30:360
81500,0rcu_preempt3-21ksoftirqd/021:30:380
81500,0rcu_preempt3-21ksoftirqd/020:20:510
81500,0rcu_preempt3-21ksoftirqd/000:19:050
10050500,0irq/346-48484000-21swapper/119:53:031
81490,0rcu_preempt3-21ksoftirqd/023:30:100
81490,0rcu_preempt3-21ksoftirqd/023:30:100
81490,0rcu_preempt3-21ksoftirqd/021:40:220
81490,0rcu_preempt19-21ksoftirqd/120:20:221
10050490,0irq/346-48484000-21swapper/122:20:231
9950480,0irq/345-484840014802-1kworker/1:0H20:10:331
81480,0rcu_preempt3-21ksoftirqd/023:37:570
81480,0rcu_preempt3-21ksoftirqd/023:15:390
81480,0rcu_preempt3-21ksoftirqd/022:26:370
81480,0rcu_preempt3-21ksoftirqd/022:22:380
81480,0rcu_preempt3-21ksoftirqd/022:15:290
81480,0rcu_preempt3-21ksoftirqd/019:10:390
81480,0rcu_preempt27134-21kworker/1:022:05:351
81480,0rcu_preempt19669-21kworker/0:020:45:370
81480,0rcu_preempt19-21ksoftirqd/121:55:231
81470,0rcu_preempt3-21ksoftirqd/021:23:100
81470,0rcu_preempt3-21ksoftirqd/020:30:440
81470,0rcu_preempt3-21ksoftirqd/020:29:290
81470,0rcu_preempt27020-21df_inode20:45:251
81470,0rcu_preempt19-21ksoftirqd/119:55:291
10050470,0irq/346-48484000-21swapper/123:31:141
81460,0rcu_preempt3-21ksoftirqd/021:00:300
81460,0rcu_preempt3-21ksoftirqd/020:55:310
81460,0rcu_preempt28961-21irqstats20:50:331
81460,0rcu_preempt19-21ksoftirqd/120:15:381
81450,0rcu_preempt3-21ksoftirqd/020:53:090
81450,0rcu_preempt3-21ksoftirqd/019:57:170
81450,0rcu_preempt19-21ksoftirqd/121:00:281
81450,0rcu_preempt19-21ksoftirqd/120:30:261
81450,0rcu_preempt19-21ksoftirqd/120:01:261
81450,0rcu_preempt19-21ksoftirqd/119:35:351
81450,0rcu_preempt19-21ksoftirqd/119:15:271
9950440,0irq/345-484840029485-21ping19:25:380
9950440,0irq/345-484840025336-21grep19:00:340
81440,0rcu_preempt3285-21kworker/0:219:35:110
81440,0rcu_preempt3-21ksoftirqd/023:50:390
81440,0rcu_preempt21489-21kworker/0:219:18:550
81440,0rcu_preempt19-21ksoftirqd/119:25:171
81430,0rcu_preempt3-21ksoftirqd/019:42:390
81430,0rcu_preempt2736-21meminfo19:30:401
81430,0rcu_preempt22820-21df_abs00:00:261
81420,0rcu_preempt3-21ksoftirqd/019:35:310
81420,0rcu_preempt26958-21sort19:05:360
81420,0rcu_preempt19-21ksoftirqd/119:40:451
81420,0rcu_preempt19-21ksoftirqd/119:05:301
10050420,0irq/346-48484000-21swapper/120:36:571
81410,0rcu_preempt19-21ksoftirqd/120:55:111
81410,0rcu_preempt19-21ksoftirqd/120:25:371
81400,0rcu_preempt19-21ksoftirqd/119:45:291
81400,0rcu_preempt19-21ksoftirqd/119:10:281
10050370,0irq/346-484840025319-21munin-node1
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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