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2026-04-25 - 15:46

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 Sat Apr 25, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81880,0rcu_preempt3-21ksoftirqd/007:33:520
81860,0rcu_preempt3-21ksoftirqd/011:18:500
81850,0rcu_preempt3-21ksoftirqd/007:43:210
81820,0rcu_preempt3-21ksoftirqd/010:03:440
81810,0rcu_preempt3-21ksoftirqd/010:38:450
81790,0rcu_preempt3-21ksoftirqd/012:13:460
81780,0rcu_preempt3-21ksoftirqd/007:43:560
81770,0rcu_preempt0-21swapper/009:40:180
10050770,0irq/346-484840054-21kswapd011:08:460
10050770,0irq/346-484840020404-1kworker/0:3H12:21:140
81760,0rcu_preempt3-21ksoftirqd/012:28:460
81760,0rcu_preempt3-21ksoftirqd/012:28:460
10050760,0irq/346-484840054-21kswapd010:26:460
10050760,0irq/346-484840013042-1kworker/0:2H09:20:180
81750,0rcu_preempt32677-21kworker/u4:211:31:370
81750,0rcu_preempt3-21ksoftirqd/011:03:330
10050750,0irq/346-484840054-21kswapd010:30:400
10050750,0irq/346-484840030660-1kworker/0:2H09:13:300
81730,0rcu_preempt27253-21kworker/0:110:08:380
81730,0rcu_preempt14510-21kworker/0:009:26:560
10050730,0irq/346-484840054-21kswapd012:08:460
10050730,0irq/346-484840015776-1kworker/0:1H10:46:060
10050720,0irq/346-484840023796-1kworker/0:4H09:31:060
10050720,0irq/346-484840023796-1kworker/0:4H09:31:060
81710,0rcu_preempt32289-21kworker/0:010:53:320
81710,0rcu_preempt3-21ksoftirqd/009:34:470
81710,0rcu_preempt14510-21kworker/0:009:50:560
10050710,0irq/346-48484003657-1kworker/0:0H10:19:520
81700,0rcu_preempt3-21ksoftirqd/011:46:490
81700,0rcu_preempt18547-21kworker/0:210:16:300
81700,0rcu_preempt16274-21kworker/0:110:48:320
81700,0rcu_preempt16160-21kworker/0:007:08:550
81700,0rcu_preempt14510-21kworker/0:009:54:230
81700,0rcu_preempt10865-21kworker/0:012:24:100
10050700,0irq/346-484840028038-1kworker/0:1H11:50:160
81690,0rcu_preempt3-21ksoftirqd/011:01:290
81690,0rcu_preempt3-21ksoftirqd/008:19:300
10050690,0irq/346-484840025925-1kworker/0:0H11:15:120
81680,0rcu_preempt3-21ksoftirqd/008:23:380
81680,0rcu_preempt3-21ksoftirqd/007:58:510
81680,0rcu_preempt10865-21kworker/0:012:06:510
81680,0rcu_preempt10865-21kworker/0:012:03:060
81680,0rcu_preempt0-21swapper/012:37:150
10050680,0irq/346-48484006260-1kworker/0:2H09:47:080
81670,0rcu_preempt3-21ksoftirqd/008:13:390
81670,0rcu_preempt3-21ksoftirqd/007:23:550
81670,0rcu_preempt30431-21munin-node0
81660,0rcu_preempt3-21ksoftirqd/011:35:520
81660,0rcu_preempt3-21ksoftirqd/010:34:590
81660,0rcu_preempt3-21ksoftirqd/008:29:190
81660,0rcu_preempt3-21ksoftirqd/008:03:520
81660,0rcu_preempt0-21swapper/011:38:460
81650,0rcu_preempt3-21ksoftirqd/011:24:320
81650,0rcu_preempt3-21ksoftirqd/009:58:360
81650,0rcu_preempt3-21ksoftirqd/009:08:470
81650,0rcu_preempt3-21ksoftirqd/008:08:460
81640,0rcu_preempt3-21ksoftirqd/011:54:540
81640,0rcu_preempt3-21ksoftirqd/008:53:390
81640,0rcu_preempt3-21ksoftirqd/007:53:360
81640,0rcu_preempt3-21ksoftirqd/007:48:460
81630,0rcu_preempt3-21ksoftirqd/008:48:310
81620,0rcu_preempt851-21rngd08:43:400
81620,0rcu_preempt3-21ksoftirqd/009:03:200
81620,0rcu_preempt3-21ksoftirqd/008:38:450
81620,0rcu_preempt3-21ksoftirqd/007:33:210
81620,0rcu_preempt3-21ksoftirqd/007:13:450
81610,0rcu_preempt3-21ksoftirqd/009:03:470
81610,0rcu_preempt3-21ksoftirqd/008:33:440
81610,0rcu_preempt19-21ksoftirqd/110:58:411
81610,0rcu_preempt19-21ksoftirqd/107:40:001
10050580,0irq/346-484840017252-21head10:28:501
81560,0rcu_preempt19-21ksoftirqd/107:21:311
81550,0rcu_preempt19-21ksoftirqd/108:48:331
81550,0rcu_preempt19-21ksoftirqd/107:44:391
81520,0rcu_preempt3-21ksoftirqd/007:03:380
10050520,0irq/346-484840019-21ksoftirqd/112:19:081
81510,0rcu_preempt14791-21ps09:53:481
10050510,0irq/346-484840025712-1kworker/1:1H11:22:401
9950500,0irq/345-4848400318-1kworker/1:1H12:27:581
10050500,0irq/346-484840025217-21ssh10:04:011
10050480,0irq/346-484840013912-1kworker/1:1H09:26:141
81470,0rcu_preempt19-21ksoftirqd/112:02:531
81470,0rcu_preempt19-21ksoftirqd/109:43:321
10050470,0irq/346-484840011415-21sendmail09:18:201
9950460,0irq/345-4848400851-21rngd10:33:491
10050460,0irq/346-484840019-21ksoftirqd/108:08:161
9950450,0irq/345-48484001302-1kworker/1:3H10:09:221
81450,0rcu_preempt19-21ksoftirqd/111:03:331
10050450,0irq/346-4848400851-21rngd09:09:161
10050450,0irq/346-484840022715-21unixbench_multi09:28:491
10050450,0irq/346-484840022715-21unixbench_multi09:28:491
10050440,0irq/346-48484009027-21ssh09:48:361
10050430,0irq/346-4848400851-21rngd11:11:281
10050420,0irq/346-48484000-21swapper/107:57:531
9950410,0irq/345-48484006487-1kworker/1:0H09:19:181
9950410,0irq/345-48484003596-1kworker/1:0H10:16:221
9950410,0irq/345-484840030261-21ping07:28:401
10050410,0irq/346-48484007097-1kworker/1:0H12:34:391
9950400,0irq/345-484840030261-21ping07:38:201
9950400,0irq/345-484840023031-21ssh12:13:351
81400,0rcu_preempt19-21ksoftirqd/111:23:351
10050400,0irq/346-4848400889-1kworker/1:0H10:53:211
10050400,0irq/346-48484005754-21munin-node1
10050400,0irq/346-48484005754-21munin-node1
10050400,0irq/346-484840030995-21runrttasks11:15:501
10050400,0irq/346-484840018084-1kworker/1:1H11:38:451
10050400,0irq/346-484840014781-21ssh10:27:021
10050390,0irq/346-484840028400-21ssh09:34:421
10050390,0irq/346-484840019360-21ssh09:58:401
10050390,0irq/346-484840010932-21ssh11:28:371
81380,0rcu_preempt26981-21cyclictest12:03:431
81380,0rcu_preempt19-21ksoftirqd/111:53:511
10050380,0irq/346-48484009846-21ssh10:22:011
10050380,0irq/346-48484005515-21ssh10:49:521
10050380,0irq/346-484840025982-21ssh10:38:301
10050380,0irq/346-48484001187-21ssh10:45:421
81370,0rcu_preempt19-21ksoftirqd/107:03:341
10050370,0irq/346-484840032407-21munin-node1
10050370,0irq/346-484840032188-21ssh11:49:251
10050370,0irq/346-484840030261-21ping07:23:391
10050370,0irq/346-484840021714-21ssh12:12:171
10050370,0irq/346-48484000-21swapper/111:46:151
9950360,0irq/345-48484000-21swapper/107:58:331
188532360,0chrt10955-1kworker/1:1H08:19:521
10050360,0irq/346-484840017714-21ssh11:34:581
237352350,0sleep122136-1kworker/1:0H08:34:351
1699350,0migration/119585-21munin-node1
10050350,0irq/346-48484000-21swapper/108:08:431
300822330,0sleep130005-1kworker/1:1H07:16:361
253282330,0sleep124103-1kworker/1:1H08:38:551
10050320,0irq/346-484840028101-21sed07:09:011
10050310,0irq/346-48484000-21swapper/108:55:391
10050310,0irq/346-48484000-21swapper/108:13:511
9950300,0irq/345-484840030005-1kworker/1:1H07:48:381
10050300,0irq/346-484840024103-1kworker/1:1H08:43:351
10050300,0irq/346-48484000-21swapper/108:58:361
9950290,0irq/345-48484000-21swapper/108:28:341
1699290,0migration/11135-21runrttasks09:04:061
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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