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2026-04-14 - 23:48

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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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 Apr 14, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811240,0rcu_preempt19-21ksoftirqd/109:53:311
811220,0rcu_preempt3-21ksoftirqd/011:46:520
811020,0rcu_preempt54-21kswapd011:54:170
811000,0rcu_preempt3-21ksoftirqd/011:31:550
81920,0rcu_preempt20080-21kworker/0:007:43:540
81890,0rcu_preempt3-21ksoftirqd/007:38:460
81890,0rcu_preempt22192-21kworker/0:212:05:290
81880,0rcu_preempt3-21ksoftirqd/010:40:100
81860,0rcu_preempt3-21ksoftirqd/011:23:520
81860,0rcu_preempt3-21ksoftirqd/011:23:520
81860,0rcu_preempt3-21ksoftirqd/010:57:450
81860,0rcu_preempt3-21ksoftirqd/007:34:100
81860,0rcu_preempt3-21ksoftirqd/007:34:100
81850,0rcu_preempt3-21ksoftirqd/010:03:450
81840,0rcu_preempt4105-21kworker/0:108:50:310
81830,0rcu_preempt3-21ksoftirqd/012:33:590
81830,0rcu_preempt3-21ksoftirqd/012:13:570
81830,0rcu_preempt3-21ksoftirqd/010:48:550
81830,0rcu_preempt3-21ksoftirqd/010:45:120
81830,0rcu_preempt3-21ksoftirqd/010:45:120
81830,0rcu_preempt3-21ksoftirqd/008:26:250
81830,0rcu_preempt3-21ksoftirqd/008:08:410
81830,0rcu_preempt3-21ksoftirqd/007:52:470
81830,0rcu_preempt27494-21kworker/0:211:40:400
81830,0rcu_preempt24778-21kworker/0:208:01:130
81820,0rcu_preempt4105-21kworker/0:109:03:430
81810,0rcu_preempt3-21ksoftirqd/009:43:590
81810,0rcu_preempt3-21ksoftirqd/009:39:340
81810,0rcu_preempt3-21ksoftirqd/008:05:050
81810,0rcu_preempt1405-21kworker/0:111:03:450
81800,0rcu_preempt2460-21kworker/0:009:27:210
81800,0rcu_preempt12898-21kworker/0:112:25:430
81790,0rcu_preempt3-21ksoftirqd/010:25:450
81790,0rcu_preempt3-21ksoftirqd/010:13:530
81790,0rcu_preempt17379-21diskmemload11:01:330
81790,0rcu_preempt16443-21ssh11:19:010
81780,0rcu_preempt3-21ksoftirqd/012:20:260
81780,0rcu_preempt3-21ksoftirqd/010:34:520
81780,0rcu_preempt3-21ksoftirqd/009:58:500
81780,0rcu_preempt3-21ksoftirqd/009:58:320
81780,0rcu_preempt27494-21kworker/0:211:38:310
81770,0rcu_preempt3-21ksoftirqd/009:19:340
81770,0rcu_preempt3-21ksoftirqd/009:19:340
81770,0rcu_preempt3-21ksoftirqd/008:43:530
81770,0rcu_preempt3-21ksoftirqd/008:14:130
81760,0rcu_preempt3-21ksoftirqd/012:29:090
81760,0rcu_preempt3-21ksoftirqd/011:50:070
81760,0rcu_preempt3-21ksoftirqd/011:16:180
81750,0rcu_preempt3-21ksoftirqd/012:12:110
81750,0rcu_preempt3-21ksoftirqd/012:02:000
81750,0rcu_preempt3-21ksoftirqd/010:20:170
81750,0rcu_preempt3-21ksoftirqd/008:42:380
81750,0rcu_preempt3-21ksoftirqd/008:38:100
81750,0rcu_preempt3-21ksoftirqd/007:09:300
81750,0rcu_preempt2460-21kworker/0:009:36:450
81750,0rcu_preempt2460-21kworker/0:009:36:450
10050750,0irq/346-484840017082-1kworker/0:1H09:09:460
10050750,0irq/346-484840014095-1kworker/0:1H10:12:560
81740,0rcu_preempt3-21ksoftirqd/009:29:290
81740,0rcu_preempt3-21ksoftirqd/009:29:290
81740,0rcu_preempt3-21ksoftirqd/008:22:180
81730,0rcu_preempt3-21ksoftirqd/009:50:570
81730,0rcu_preempt3-21ksoftirqd/009:18:270
81730,0rcu_preempt3-21ksoftirqd/009:03:010
81730,0rcu_preempt3-21ksoftirqd/008:57:020
81730,0rcu_preempt3-21ksoftirqd/008:30:510
81720,0rcu_preempt3-21ksoftirqd/011:08:400
81720,0rcu_preempt3-21ksoftirqd/010:33:310
81720,0rcu_preempt3-21ksoftirqd/007:54:360
81720,0rcu_preempt3-21ksoftirqd/007:17:040
81710,0rcu_preempt3-21ksoftirqd/007:29:030
81700,0rcu_preempt3-21ksoftirqd/007:24:020
81680,0rcu_preempt13824-21apt-get07:18:420
81670,0rcu_preempt19-21ksoftirqd/110:08:591
10050630,0irq/346-48484001470-21runrttasks10:35:141
10050610,0irq/346-484840026578-21ssh10:23:501
9950550,0irq/345-484840081rcu_preempt10:29:571
10050550,0irq/346-484840083692chrt11:10:581
10050550,0irq/346-48484007302-1kworker/1:0H11:44:211
9950520,0irq/345-4848400181ktimersoftd/110:06:321
9950520,0irq/345-484840010500-1kworker/1:2H12:24:451
9950510,0irq/345-484840029802-1kworker/1:0H09:23:391
10050510,0irq/346-484840026772-21sendmail07:58:301
10050510,0irq/346-4848400167482chrt10:46:421
10050510,0irq/346-4848400167482chrt10:46:421
9950500,0irq/345-484840025864-1kworker/1:1H10:59:431
9950500,0irq/345-484840025864-1kworker/1:1H10:56:051
9950500,0irq/345-484840020151-1kworker/1:1H12:38:061
10050500,0irq/346-48484000-21swapper/109:39:581
9950490,0irq/345-48484007302-1kworker/1:0H11:53:131
9950490,0irq/345-48484005684-1kworker/1:0H12:15:061
9950490,0irq/345-484840029802-1kworker/1:0H09:21:421
9950490,0irq/345-484840029802-1kworker/1:0H09:21:421
9950490,0irq/345-484840022216-1kworker/1:1H11:26:211
9950490,0irq/345-484840022216-1kworker/1:1H11:26:211
9950490,0irq/345-484840021950-1kworker/1:0H09:59:431
10050490,0irq/346-484840022210-21ssh10:18:551
9950480,0irq/345-484840027037-1kworker/1:2H11:30:081
9950480,0irq/345-48484002160-1kworker/1:3H11:42:551
9950480,0irq/345-484840017318-1kworker/1:3H11:21:141
10050480,0irq/346-4848400171rcuc/112:03:581
9950470,0irq/345-484840018994-1kworker/1:2H10:18:211
81470,0rcu_preempt3-21ksoftirqd/007:03:510
10050470,0irq/346-48484000-21swapper/109:54:231
10050470,0irq/346-48484000-21swapper/109:10:101
10050460,0irq/346-484840024878-1kworker/1:2H09:18:311
9950450,0irq/345-48484000-21swapper/111:56:251
10050450,0irq/346-484840013654-21ping07:29:011
9950440,0irq/345-48484003325-1kworker/1:1H11:05:511
9950440,0irq/345-484840020151-1kworker/1:1H12:31:091
10050440,0irq/346-484840011264-21meminfo11:13:551
10050430,0irq/346-48484000-21swapper/110:43:071
9950420,0irq/345-484840029760-1kworker/1:2H08:05:191
9950420,0irq/345-484840016039-1kworker/1:3H10:49:391
81420,0rcu_preempt19-21ksoftirqd/109:33:431
81420,0rcu_preempt19-21ksoftirqd/109:33:431
81410,0rcu_preempt22014-21apt-get07:43:411
10050410,0irq/346-48484006615-21ssh09:29:461
10050410,0irq/346-48484006615-21ssh09:29:461
10050410,0irq/346-484840023627-1kworker/1:0H12:02:321
9950400,0irq/345-484840017042-1kworker/1:1H09:47:471
81400,0rcu_preempt19-21ksoftirqd/108:23:511
10050400,0irq/346-484840011142-21ssh12:20:511
10050400,0irq/346-48484000-21swapper/107:10:101
81370,0rcu_preempt19-21ksoftirqd/107:03:461
10050370,0irq/346-4848400333-21ssh12:09:191
10050370,0irq/346-484840031937-21ssh11:34:561
10050360,0irq/346-484840017081-1kworker/1:2H09:05:291
10050350,0irq/346-48484000-21swapper/108:57:431
9950340,0irq/345-48484000-21swapper/108:18:591
81340,0rcu_preempt0-21swapper/108:13:501
1699340,0migration/128432-21idleruntime-cro08:03:311
135732330,0chrt13321-1kworker/1:2H07:17:481
10050330,0irq/346-48484000-21swapper/108:38:451
9950320,0irq/345-48484009517-21ssh08:43:461
169962320,0sleep114991-1kworker/1:1H07:28:311
13250320,0irq/301-480200013654-21ping07:18:481
247582310,0sleep123185-1kworker/1:1H07:49:361
154332310,0chrt13780-1kworker/1:2H09:00:231
10050310,0irq/346-484840020475-21wget07:38:451
9950300,0irq/345-484840013654-21ping07:33:321
9950300,0irq/345-484840013654-21ping07:33:321
1037799292,0cyclictest0-21swapper/108:13:191
10050290,0irq/346-484840011814-21timerandwakeup08:48:571
10050280,0irq/346-48484000-21swapper/108:28:481
81270,0rcu_preempt19-21ksoftirqd/108:33:581
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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