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2026-07-21 - 16:42

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 Tue Jul 21, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811290,0rcu_preempt19-21ksoftirqd/110:46:001
811260,0rcu_preempt851-21rngd09:16:171
811240,0rcu_preempt19-21ksoftirqd/110:58:011
811220,0rcu_preempt19-21ksoftirqd/112:02:161
811210,0rcu_preempt19-21ksoftirqd/111:45:101
811190,0rcu_preempt19-21ksoftirqd/111:13:321
811160,0rcu_preempt19-21ksoftirqd/111:47:571
811160,0rcu_preempt19-21ksoftirqd/109:47:161
811150,0rcu_preempt19-21ksoftirqd/109:24:191
811130,0rcu_preempt19-21ksoftirqd/107:47:141
811120,0rcu_preempt19-21ksoftirqd/110:00:541
811110,0rcu_preempt19-21ksoftirqd/107:25:311
811100,0rcu_preempt54-21kswapd009:42:091
811090,0rcu_preempt19-21ksoftirqd/109:18:021
811090,0rcu_preempt1183-21kworker/1:212:10:081
811070,0rcu_preempt19-21ksoftirqd/110:12:061
811060,0rcu_preempt19-21ksoftirqd/112:33:021
811060,0rcu_preempt14553-21ssh12:23:231
811050,0rcu_preempt19-21ksoftirqd/111:32:241
811050,0rcu_preempt19-21ksoftirqd/109:38:131
811050,0rcu_preempt19-21ksoftirqd/109:38:131
811040,0rcu_preempt19-21ksoftirqd/111:21:511
811040,0rcu_preempt0-21swapper/111:37:231
811030,0rcu_preempt19-21ksoftirqd/111:23:361
811020,0rcu_preempt19-21ksoftirqd/108:31:421
811010,0rcu_preempt8794-21ssh09:32:431
811010,0rcu_preempt19-21ksoftirqd/112:27:091
811000,0rcu_preempt19-21ksoftirqd/110:52:341
81990,0rcu_preempt54-21kswapd010:09:241
81990,0rcu_preempt19-21ksoftirqd/109:29:371
81980,0rcu_preempt8763-21ssh10:06:291
81980,0rcu_preempt54-21kswapd009:09:271
81980,0rcu_preempt19-21ksoftirqd/111:56:521
81980,0rcu_preempt19-21ksoftirqd/110:50:401
81960,0rcu_preempt19-21ksoftirqd/110:25:431
81950,0rcu_preempt54-21kswapd010:27:111
81940,0rcu_preempt19-21ksoftirqd/112:00:501
81940,0rcu_preempt19-21ksoftirqd/108:02:201
81930,0rcu_preempt19-21ksoftirqd/110:40:171
81930,0rcu_preempt19-21ksoftirqd/110:20:421
81910,0rcu_preempt19-21ksoftirqd/110:32:251
81870,0rcu_preempt19-21ksoftirqd/112:18:291
81870,0rcu_preempt19-21ksoftirqd/111:11:311
81860,0rcu_preempt19-21ksoftirqd/108:25:581
81850,0rcu_preempt19-21ksoftirqd/111:30:201
81840,0rcu_preempt19-21ksoftirqd/107:32:041
81840,0rcu_preempt19-21ksoftirqd/107:20:061
81830,0rcu_preempt19-21ksoftirqd/108:09:181
81820,0rcu_preempt19-21ksoftirqd/108:20:131
81820,0rcu_preempt19-21ksoftirqd/107:28:141
81800,0rcu_preempt54-21kswapd012:12:291
81800,0rcu_preempt19-21ksoftirqd/108:13:101
81800,0rcu_preempt19-21ksoftirqd/107:37:361
81780,0rcu_preempt19-21ksoftirqd/109:55:301
81780,0rcu_preempt19-21ksoftirqd/107:52:141
81780,0rcu_preempt19-21ksoftirqd/107:45:211
81760,0rcu_preempt19-21ksoftirqd/109:00:091
81760,0rcu_preempt19-21ksoftirqd/107:57:151
81760,0rcu_preempt19-21ksoftirqd/107:11:051
81740,0rcu_preempt19-21ksoftirqd/108:41:051
81730,0rcu_preempt19-21ksoftirqd/111:02:281
81730,0rcu_preempt19-21ksoftirqd/108:52:151
81730,0rcu_preempt19-21ksoftirqd/108:47:231
81730,0rcu_preempt19-21ksoftirqd/108:42:091
81710,0rcu_preempt19-21ksoftirqd/108:32:101
81700,0rcu_preempt19-21ksoftirqd/107:06:561
10050670,0irq/346-484840024476-1kworker/0:3H09:49:480
81660,0rcu_preempt19-21ksoftirqd/109:02:091
81660,0rcu_preempt19-21ksoftirqd/107:12:241
81620,0rcu_preempt3-21ksoftirqd/012:03:150
81610,0rcu_preempt3-21ksoftirqd/011:02:430
791899611,0cyclictest11196-21ping07:35:380
81600,0rcu_preempt54-21kswapd009:30:200
81600,0rcu_preempt3-21ksoftirqd/011:26:540
81580,0rcu_preempt3-21ksoftirqd/010:01:570
81570,0rcu_preempt3-21ksoftirqd/011:00:190
81560,0rcu_preempt54-21kswapd009:35:120
10050510,0irq/346-4848400952-21dropbear11:37:130
10050510,0irq/346-4848400851-21rngd10:12:170
10050510,0irq/346-484840032638-21meminfo09:57:200
10050500,0irq/346-484840054-21kswapd011:42:330
10050500,0irq/346-484840054-21kswapd009:45:470
10050500,0irq/346-484840020355-21apt-get11:57:070
10050490,0irq/346-484840054-21kswapd012:10:040
10050490,0irq/346-484840054-21kswapd011:19:260
10050490,0irq/346-48484000-21swapper/010:42:120
9950480,0irq/345-48484000-21swapper/010:20:460
10050480,0irq/346-48484009656-21diskstats10:07:130
10050480,0irq/346-48484000-21swapper/011:12:400
9950470,0irq/345-484840054-21kswapd009:39:100
9950470,0irq/345-484840054-21kswapd009:39:100
1599470,0migration/06580-21cpu07:02:100
10050470,0irq/346-484840024219-21ssh10:54:380
10050470,0irq/346-484840022352-21runrttasks12:32:030
9950460,0irq/345-48484009687-1kworker/0:0H09:53:320
81460,0rcu_preempt3-21ksoftirqd/011:32:070
10050450,0irq/346-48484000-21swapper/010:24:100
10050450,0irq/346-48484000-21swapper/009:15:460
9950440,0irq/345-48484000-21swapper/011:53:190
9950440,0irq/345-48484000-21swapper/010:36:090
9950440,0irq/345-48484000-21swapper/010:30:310
10050440,0irq/346-48484000-21swapper/012:30:290
9950430,0irq/345-48484000-21swapper/010:51:180
791899432,0cyclictest0-21swapper/008:08:290
13250430,0irq/301-480200014346-21kworker/0:007:27:120
10050420,0irq/346-484840054-21kswapd011:07:130
9950410,0irq/345-484840027335-21ssh11:31:080
9950410,0irq/345-48484000-21swapper/012:24:050
9950410,0irq/345-48484000-21swapper/012:12:190
791899411,0cyclictest11196-21ping07:42:160
10050410,0irq/346-48484009221-1kworker/0:1H07:12:160
9950400,0irq/345-484840030891-21awk08:16:560
9950400,0irq/345-48484000-21swapper/009:17:400
9950400,0irq/345-48484000-21swapper/007:57:190
81400,0rcu_preempt3-21ksoftirqd/012:17:100
7918994013,0cyclictest0-21swapper/007:22:530
10050400,0irq/346-4848400789-21latency08:22:190
10050400,0irq/346-48484007397-21ssh10:37:220
10050400,0irq/346-484840054-21kswapd009:24:280
96472390,0sleep08034-1kworker/0:2H08:48:350
10050390,0irq/346-48484005205-21munin-node0
10050390,0irq/346-484840022288-21runrttasks07:47:550
9950380,0irq/345-4848400851-21rngd11:50:160
9950380,0irq/345-48484000-21swapper/008:04:120
7918993810,0cyclictest0-21swapper/007:37:350
322702380,0sleep030755-1kworker/0:3H08:19:120
791899372,0cyclictest11196-21ping07:17:150
10050370,0irq/346-48484008555-21irqstats07:07:180
9950360,0irq/345-484840015243-21grep09:07:080
9950360,0irq/345-48484000-21swapper/008:57:130
10050360,0irq/346-48484007734-21ls08:42:240
10050360,0irq/346-484840018233-1kworker/0:0H07:52:210
10050360,0irq/346-48484000-21swapper/008:52:250
9950350,0irq/345-48484000-21swapper/008:27:220
791899322,0cyclictest0-21swapper/008:33:470
81300,0rcu_preempt1822-21kworker/0:209:02:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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