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2026-04-30 - 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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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 Thu Apr 30, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81760,0rcu_preempt19-21ksoftirqd/109:58:431
81750,0rcu_preempt19-21ksoftirqd/111:40:041
81700,0rcu_preempt851-21rngd12:23:341
81680,0rcu_preempt3-21ksoftirqd/012:09:230
81680,0rcu_preempt3-21ksoftirqd/011:36:370
81680,0rcu_preempt19-21ksoftirqd/112:00:441
81650,0rcu_preempt19-21ksoftirqd/111:05:131
10050640,0irq/346-484840024930-1kworker/0:2H09:29:280
81630,0rcu_preempt54-21kswapd010:41:530
81630,0rcu_preempt19-21ksoftirqd/112:14:341
81630,0rcu_preempt19-21ksoftirqd/107:23:481
81620,0rcu_preempt3-21ksoftirqd/008:23:260
81620,0rcu_preempt19-21ksoftirqd/110:43:191
81620,0rcu_preempt19-21ksoftirqd/109:19:071
81600,0rcu_preempt19-21ksoftirqd/109:50:161
81590,0rcu_preempt19-21ksoftirqd/108:03:231
81580,0rcu_preempt19-21ksoftirqd/111:51:591
81560,0rcu_preempt3-21ksoftirqd/009:21:450
81560,0rcu_preempt15383-21ping07:58:270
10050560,0irq/346-48484000-21swapper/010:53:420
9950550,0irq/345-4848400181ktimersoftd/111:25:121
81550,0rcu_preempt23736-21kworker/0:108:34:310
81550,0rcu_preempt0-21swapper/107:58:001
10050550,0irq/346-484840054-21kswapd011:53:240
10050550,0irq/346-484840054-21kswapd011:44:090
81540,0rcu_preempt3-21ksoftirqd/008:13:260
81540,0rcu_preempt24538-21kworker/0:112:15:250
81540,0rcu_preempt19-21ksoftirqd/112:09:371
81540,0rcu_preempt19-21ksoftirqd/110:58:301
10050540,0irq/346-484840054-21kswapd009:33:420
10050540,0irq/346-484840054-21kswapd007:38:160
81530,0rcu_preempt3-21ksoftirqd/011:49:250
81530,0rcu_preempt3-21ksoftirqd/009:26:180
10050530,0irq/346-484840030009-1kworker/0:3H10:07:190
10050530,0irq/346-48484000-21swapper/009:58:290
81520,0rcu_preempt3-21ksoftirqd/010:08:380
81520,0rcu_preempt3-21ksoftirqd/009:38:420
81520,0rcu_preempt3-21ksoftirqd/009:38:420
81520,0rcu_preempt23170-21kworker/u4:211:11:300
81520,0rcu_preempt19-21ksoftirqd/110:08:341
81520,0rcu_preempt19-21ksoftirqd/110:03:401
10050520,0irq/346-48484002509-21ping07:23:280
81510,0rcu_preempt7092-21kworker/0:109:11:080
81510,0rcu_preempt3-21ksoftirqd/010:28:320
81510,0rcu_preempt3-21ksoftirqd/007:08:360
81510,0rcu_preempt19-21ksoftirqd/111:43:301
81510,0rcu_preempt19-21ksoftirqd/110:21:471
81510,0rcu_preempt10139-21kworker/0:010:26:010
10050510,0irq/346-484840016823-1kworker/0:2H11:41:260
10050510,0irq/346-48484000-21swapper/010:18:430
9950500,0irq/345-4848400171rcuc/109:25:391
81500,0rcu_preempt3700-21apt-get09:03:260
81500,0rcu_preempt3-21ksoftirqd/012:36:400
81500,0rcu_preempt3-21ksoftirqd/012:25:180
81500,0rcu_preempt3-21ksoftirqd/010:51:450
81500,0rcu_preempt0-21swapper/010:59:520
10050500,0irq/346-484840054-21kswapd011:28:010
10050500,0irq/346-484840010468-1kworker/0:2H09:49:120
81490,0rcu_preempt3-21ksoftirqd/011:58:380
81490,0rcu_preempt3-21ksoftirqd/010:13:260
81490,0rcu_preempt3-21ksoftirqd/009:45:110
81490,0rcu_preempt3-21ksoftirqd/008:18:450
81490,0rcu_preempt3-21ksoftirqd/008:05:310
10050490,0irq/346-484840016823-1kworker/0:2H11:31:320
81480,0rcu_preempt3-21ksoftirqd/012:03:290
81480,0rcu_preempt3-21ksoftirqd/011:22:020
81480,0rcu_preempt3-21ksoftirqd/008:53:250
81480,0rcu_preempt3-21ksoftirqd/008:08:160
81480,0rcu_preempt3-21ksoftirqd/007:48:320
81480,0rcu_preempt19-21ksoftirqd/112:30:291
81480,0rcu_preempt19-21ksoftirqd/112:30:291
81480,0rcu_preempt19-21ksoftirqd/111:33:461
81480,0rcu_preempt19-21ksoftirqd/109:38:381
81480,0rcu_preempt19-21ksoftirqd/109:38:381
81480,0rcu_preempt19-21ksoftirqd/108:16:001
81470,0rcu_preempt3-21ksoftirqd/011:13:310
81470,0rcu_preempt3-21ksoftirqd/009:13:300
81470,0rcu_preempt3-21ksoftirqd/007:53:330
81470,0rcu_preempt30563-21apt-get08:43:270
81470,0rcu_preempt2509-21ping07:38:280
81470,0rcu_preempt2509-21ping07:38:280
81470,0rcu_preempt2509-21ping07:18:270
81470,0rcu_preempt23736-21kworker/0:108:28:390
81470,0rcu_preempt19-21ksoftirqd/110:33:101
81470,0rcu_preempt19-21ksoftirqd/109:45:321
81470,0rcu_preempt19-21ksoftirqd/109:28:241
81470,0rcu_preempt19-21ksoftirqd/108:18:361
9950460,0irq/345-48484002376-21touch09:38:151
81460,0rcu_preempt3-21ksoftirqd/012:19:550
81460,0rcu_preempt3-21ksoftirqd/009:53:260
81460,0rcu_preempt19-21ksoftirqd/111:18:271
81460,0rcu_preempt19-21ksoftirqd/110:27:591
81460,0rcu_preempt19-21ksoftirqd/107:38:401
81460,0rcu_preempt19-21ksoftirqd/107:38:401
81460,0rcu_preempt19-21ksoftirqd/107:32:491
81460,0rcu_preempt16033-21kworker/0:011:04:490
81450,0rcu_preempt3-21ksoftirqd/012:28:320
81450,0rcu_preempt3-21ksoftirqd/012:28:320
81450,0rcu_preempt3-21ksoftirqd/010:43:410
81450,0rcu_preempt3-21ksoftirqd/007:13:400
81450,0rcu_preempt3-21ksoftirqd/007:04:560
81450,0rcu_preempt31838-21apt-get11:13:251
81450,0rcu_preempt28923-21apt-get08:38:250
81450,0rcu_preempt19-21ksoftirqd/110:50:351
81450,0rcu_preempt19-21ksoftirqd/110:34:431
81450,0rcu_preempt19-21ksoftirqd/110:14:421
81450,0rcu_preempt19-21ksoftirqd/108:38:321
81450,0rcu_preempt19-21ksoftirqd/108:23:451
81450,0rcu_preempt19-21ksoftirqd/108:09:161
81450,0rcu_preempt19-21ksoftirqd/107:58:361
81450,0rcu_preempt18023-21ssh09:53:321
10050450,0irq/346-484840026999-21ssh10:35:010
81440,0rcu_preempt3-21ksoftirqd/008:58:370
81440,0rcu_preempt19-21ksoftirqd/111:08:321
81440,0rcu_preempt19-21ksoftirqd/109:14:061
81440,0rcu_preempt19-21ksoftirqd/109:08:411
81440,0rcu_preempt19-21ksoftirqd/107:21:071
81430,0rcu_preempt5188-21diskmemload10:54:021
81430,0rcu_preempt19-21ksoftirqd/112:18:161
81430,0rcu_preempt19-21ksoftirqd/108:54:021
81430,0rcu_preempt19-21ksoftirqd/107:37:011
81420,0rcu_preempt54-21kswapd012:33:311
81420,0rcu_preempt19-21ksoftirqd/111:53:261
81420,0rcu_preempt19-21ksoftirqd/107:43:371
81410,0rcu_preempt3-21ksoftirqd/008:50:190
81410,0rcu_preempt19-21ksoftirqd/112:04:491
81410,0rcu_preempt19-21ksoftirqd/111:32:551
81410,0rcu_preempt19-21ksoftirqd/107:48:311
81410,0rcu_preempt19-21ksoftirqd/107:13:411
81410,0rcu_preempt19-21ksoftirqd/107:07:001
81400,0rcu_preempt3-21ksoftirqd/007:28:290
81400,0rcu_preempt29975-21ssh10:38:301
81400,0rcu_preempt19-21ksoftirqd/108:59:491
81400,0rcu_preempt19-21ksoftirqd/108:29:131
81400,0rcu_preempt19-21ksoftirqd/107:08:341
81390,0rcu_preempt19-21ksoftirqd/109:05:411
81380,0rcu_preempt19-21ksoftirqd/108:49:471
81380,0rcu_preempt19-21ksoftirqd/108:33:261
3163999382,0cyclictest0-21swapper/007:44:120
81370,0rcu_preempt19-21ksoftirqd/108:47:091
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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