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2025-06-24 - 18:41

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 376 highest latencies:
System rackaslot5s.osadl.org (updated Tue Jun 24, 2025 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81720,0rcu_preempt19-21ksoftirqd/110:10:391
81690,0rcu_preempt19-21ksoftirqd/109:40:391
81680,0rcu_preempt54-21kswapd011:27:251
81680,0rcu_preempt19-21ksoftirqd/112:16:101
81660,0rcu_preempt19-21ksoftirqd/111:51:381
81660,0rcu_preempt0-21swapper/010:05:570
81650,0rcu_preempt3-21ksoftirqd/011:32:060
81650,0rcu_preempt3-21ksoftirqd/009:24:310
81650,0rcu_preempt3-21ksoftirqd/009:24:310
81650,0rcu_preempt19-21ksoftirqd/111:22:401
81650,0rcu_preempt19-21ksoftirqd/109:47:521
81640,0rcu_preempt19-21ksoftirqd/111:07:261
81630,0rcu_preempt3-21ksoftirqd/010:21:310
81630,0rcu_preempt19-21ksoftirqd/112:08:281
81630,0rcu_preempt19-21ksoftirqd/112:08:281
81620,0rcu_preempt19-21ksoftirqd/109:54:021
10050620,0irq/346-484840011225-1kworker/0:1H11:52:270
81610,0rcu_preempt19-21ksoftirqd/111:42:021
81610,0rcu_preempt19-21ksoftirqd/111:41:111
81610,0rcu_preempt19-21ksoftirqd/111:35:081
81610,0rcu_preempt19-21ksoftirqd/110:22:101
81610,0rcu_preempt19-21ksoftirqd/109:59:581
81610,0rcu_preempt19-21ksoftirqd/108:02:321
81600,0rcu_preempt19-21ksoftirqd/112:29:351
81600,0rcu_preempt19-21ksoftirqd/110:20:171
10050600,0irq/346-4848400181ktimersoftd/112:06:071
10050600,0irq/346-484840012669-21apt-get09:32:110
81590,0rcu_preempt3-21ksoftirqd/008:19:400
81590,0rcu_preempt19-21ksoftirqd/110:49:391
81590,0rcu_preempt19-21ksoftirqd/109:17:371
81570,0rcu_preempt19-21ksoftirqd/111:04:461
81570,0rcu_preempt19-21ksoftirqd/110:35:501
10050560,0irq/346-484840027161-1kworker/0:1H10:41:020
81550,0rcu_preempt19-21ksoftirqd/107:22:241
81550,0rcu_preempt1361-21runrttasks08:05:270
81540,0rcu_preempt54-21kswapd009:28:581
81530,0rcu_preempt3-21ksoftirqd/010:50:160
81530,0rcu_preempt3-21ksoftirqd/010:08:050
81530,0rcu_preempt19-21ksoftirqd/108:17:261
81520,0rcu_preempt3812-21ping08:15:271
81520,0rcu_preempt3-21ksoftirqd/012:31:300
81520,0rcu_preempt19-21ksoftirqd/112:17:541
81510,0rcu_preempt691-21kworker/0:209:17:030
81510,0rcu_preempt3-21ksoftirqd/012:09:400
81510,0rcu_preempt3-21ksoftirqd/012:09:400
81510,0rcu_preempt3-21ksoftirqd/011:27:590
10050510,0irq/346-48484008659-21ssh11:45:490
9950500,0irq/345-4848400181ktimersoftd/109:22:541
9950500,0irq/345-4848400181ktimersoftd/109:22:541
81500,0rcu_preempt3-21ksoftirqd/011:21:320
81500,0rcu_preempt3-21ksoftirqd/011:09:450
81500,0rcu_preempt3-21ksoftirqd/008:24:180
81500,0rcu_preempt3-21ksoftirqd/008:07:120
81500,0rcu_preempt3-21ksoftirqd/008:07:120
81500,0rcu_preempt27359-21kworker/0:107:52:290
81500,0rcu_preempt19-21ksoftirqd/110:12:221
81500,0rcu_preempt17458-21ssh09:37:300
81500,0rcu_preempt1361-21runrttasks12:20:460
81490,0rcu_preempt3-21ksoftirqd/010:29:060
81490,0rcu_preempt3-21ksoftirqd/010:29:060
81490,0rcu_preempt3-21ksoftirqd/009:47:300
81490,0rcu_preempt3-21ksoftirqd/009:12:270
81490,0rcu_preempt3-21ksoftirqd/007:59:540
81490,0rcu_preempt19-21ksoftirqd/107:59:371
10050490,0irq/346-484840011225-1kworker/0:1H12:01:190
81480,0rcu_preempt3-21ksoftirqd/009:42:250
81480,0rcu_preempt3-21ksoftirqd/009:27:110
81480,0rcu_preempt3-21ksoftirqd/008:50:320
81480,0rcu_preempt3-21ksoftirqd/008:13:420
81480,0rcu_preempt28290-21kworker/0:010:57:270
81480,0rcu_preempt22179-21kworker/0:211:24:370
81480,0rcu_preempt19-21ksoftirqd/112:22:101
81480,0rcu_preempt19-21ksoftirqd/110:42:231
81480,0rcu_preempt19-21ksoftirqd/110:42:231
81480,0rcu_preempt16198-21df_inode10:22:170
81470,0rcu_preempt3-21ksoftirqd/011:06:120
81470,0rcu_preempt3-21ksoftirqd/010:00:100
81470,0rcu_preempt3-21ksoftirqd/007:11:290
81470,0rcu_preempt19-21ksoftirqd/111:57:261
81470,0rcu_preempt19-21ksoftirqd/107:43:221
81470,0rcu_preempt19-21ksoftirqd/107:35:541
81470,0rcu_preempt19-21ksoftirqd/107:28:061
81470,0rcu_preempt19186-21diskstats08:42:170
81470,0rcu_preempt16788-21kworker/0:012:14:040
81470,0rcu_preempt0-21swapper/010:13:070
10050470,0irq/346-484840027934-1kworker/0:1H07:47:120
10050470,0irq/346-484840023736-21ssh12:05:360
10050470,0irq/346-48484000-21swapper/011:49:340
10050470,0irq/346-48484000-21swapper/011:40:160
81460,0rcu_preempt3-21ksoftirqd/012:22:230
81460,0rcu_preempt3-21ksoftirqd/011:14:170
81460,0rcu_preempt3-21ksoftirqd/009:02:180
81460,0rcu_preempt3-21ksoftirqd/008:37:180
81460,0rcu_preempt3-21ksoftirqd/007:41:530
81460,0rcu_preempt3-21ksoftirqd/007:41:530
81460,0rcu_preempt27359-21kworker/0:107:29:120
81460,0rcu_preempt19-21ksoftirqd/108:08:531
81460,0rcu_preempt19-21ksoftirqd/108:08:531
81460,0rcu_preempt19-21ksoftirqd/107:17:291
81460,0rcu_preempt19-21ksoftirqd/107:17:291
81460,0rcu_preempt19-21ksoftirqd/107:07:261
81460,0rcu_preempt13612-21php-cgi12:32:541
10050460,0irq/346-484840012259-1kworker/0:1H12:32:230
10050460,0irq/346-48484000-21swapper/010:34:240
81450,0rcu_preempt3-21ksoftirqd/010:42:120
81450,0rcu_preempt3-21ksoftirqd/010:42:120
81450,0rcu_preempt3-21ksoftirqd/008:56:590
81450,0rcu_preempt19-21ksoftirqd/111:16:161
81450,0rcu_preempt19-21ksoftirqd/110:57:141
81450,0rcu_preempt19-21ksoftirqd/109:42:211
81450,0rcu_preempt19-21ksoftirqd/108:22:141
81450,0rcu_preempt19-21ksoftirqd/107:55:441
81450,0rcu_preempt19-21ksoftirqd/107:38:541
81450,0rcu_preempt19-21ksoftirqd/107:38:541
81450,0rcu_preempt1118-21diskstats07:47:161
10050450,0irq/346-484840028982-21ssh09:53:100
10050450,0irq/346-484840027509-21ssh09:07:160
81440,0rcu_preempt753-21rngd10:37:431
81440,0rcu_preempt19-21ksoftirqd/111:17:221
81440,0rcu_preempt19-21ksoftirqd/110:52:261
81440,0rcu_preempt19-21ksoftirqd/109:08:141
81440,0rcu_preempt18747-21df_inode07:02:161
81440,0rcu_preempt18747-21df_inode07:02:161
1599440,0migration/024729-21taskset07:19:210
1599440,0migration/024729-21taskset07:19:210
81430,0rcu_preempt19-21ksoftirqd/109:13:131
81430,0rcu_preempt19-21ksoftirqd/108:27:191
81430,0rcu_preempt19-21ksoftirqd/107:12:201
81430,0rcu_preempt19-21ksoftirqd/107:12:201
81430,0rcu_preempt15857-21df08:32:140
10050430,0irq/346-48484004699-21ssh10:54:330
10050430,0irq/346-484840023741-1kworker/0:2H08:57:250
10050430,0irq/346-484840023741-1kworker/0:2H08:57:250
81420,0rcu_preempt3-21ksoftirqd/007:46:320
81420,0rcu_preempt27359-21kworker/0:107:32:140
81420,0rcu_preempt19-21ksoftirqd/111:56:381
81420,0rcu_preempt19-21ksoftirqd/110:27:231
81420,0rcu_preempt19-21ksoftirqd/110:27:231
81420,0rcu_preempt19-21ksoftirqd/110:06:081
81420,0rcu_preempt19-21ksoftirqd/108:57:211
81420,0rcu_preempt19-21ksoftirqd/108:57:211
10050420,0irq/346-484840013590-1kworker/0:1H08:27:200
81410,0rcu_preempt7357-21kworker/1:209:33:081
81410,0rcu_preempt3-21ksoftirqd/007:05:450
81410,0rcu_preempt3-21ksoftirqd/007:05:450
10050410,0irq/346-484840021843-21munin-node0
10050410,0irq/346-484840021843-21munin-node0
81400,0rcu_preempt3-21ksoftirqd/007:25:480
81400,0rcu_preempt19-21ksoftirqd/108:52:481
81400,0rcu_preempt19-21ksoftirqd/108:47:301
81400,0rcu_preempt19-21ksoftirqd/108:32:011
81390,0rcu_preempt19-21ksoftirqd/108:39:431
81380,0rcu_preempt19-21ksoftirqd/109:04:261
81370,0rcu_preempt19169-21dropbear08:42:161
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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