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2025-12-06 - 20:42

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 Sat Dec 06, 2025 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81940,0rcu_preempt3996-1kworker/1:2H07:39:461
81920,0rcu_preempt24809-1kworker/1:0H09:36:281
81890,0rcu_preempt19-21ksoftirqd/110:19:481
172352880,0sleep010050irq/346-484840008:08:130
81870,0rcu_preempt19-21ksoftirqd/110:25:291
81860,0rcu_preempt19-21ksoftirqd/112:17:451
81850,0rcu_preempt19-21ksoftirqd/108:57:041
81830,0rcu_preempt54-21kswapd009:45:581
81830,0rcu_preempt54-21kswapd009:45:581
81830,0rcu_preempt19-21ksoftirqd/110:54:511
81820,0rcu_preempt19-21ksoftirqd/109:28:461
140362820,0sleep010050irq/346-484840007:59:110
140362820,0sleep010050irq/346-484840007:59:110
81810,0rcu_preempt19-21ksoftirqd/111:09:391
81810,0rcu_preempt19-21ksoftirqd/109:29:571
236792800,0sleep010050irq/346-484840008:27:040
236792800,0sleep010050irq/346-484840008:27:040
81770,0rcu_preempt3-21ksoftirqd/009:55:350
81750,0rcu_preempt3-21ksoftirqd/011:36:470
81730,0rcu_preempt3-21ksoftirqd/010:18:120
10050720,0irq/346-484840030430-1kworker/0:2H10:35:010
81710,0rcu_preempt3-21ksoftirqd/010:24:370
81710,0rcu_preempt3-21ksoftirqd/010:07:240
81710,0rcu_preempt3-21ksoftirqd/009:12:410
81710,0rcu_preempt19-21ksoftirqd/110:12:381
81700,0rcu_preempt3-21ksoftirqd/011:17:120
81700,0rcu_preempt19-21ksoftirqd/110:07:581
81700,0rcu_preempt17202-21kworker/1:011:34:351
81690,0rcu_preempt19-21ksoftirqd/109:11:251
10050680,0irq/346-484840012613-1kworker/0:0H10:46:120
9950670,0irq/345-48484000-21swapper/009:28:220
81670,0rcu_preempt19-21ksoftirqd/111:55:511
81670,0rcu_preempt19-21ksoftirqd/111:44:371
81660,0rcu_preempt3-21ksoftirqd/010:42:200
81660,0rcu_preempt0-21swapper/111:01:031
55442660,0sleep19950irq/345-484840007:30:421
55442660,0sleep19950irq/345-484840007:30:421
155252660,0sleep010050irq/346-484840008:02:240
81640,0rcu_preempt3-21ksoftirqd/011:14:170
81640,0rcu_preempt3-21ksoftirqd/009:48:030
81640,0rcu_preempt3-21ksoftirqd/009:48:030
81640,0rcu_preempt19-21ksoftirqd/112:28:021
81640,0rcu_preempt19-21ksoftirqd/112:00:171
81640,0rcu_preempt19-21ksoftirqd/111:26:001
81640,0rcu_preempt19-21ksoftirqd/111:18:081
81640,0rcu_preempt19-21ksoftirqd/110:40:291
81640,0rcu_preempt19-21ksoftirqd/109:57:001
81630,0rcu_preempt19-21ksoftirqd/111:29:301
81620,0rcu_preempt3-21ksoftirqd/010:54:370
81620,0rcu_preempt1943-1kworker/1:2H10:31:081
252372620,0sleep09950irq/345-484840012:21:280
189032620,0sleep010050irq/346-484840008:13:370
81610,0rcu_preempt751-21rngd11:48:090
81610,0rcu_preempt19-21ksoftirqd/109:20:311
81610,0rcu_preempt19-21ksoftirqd/108:20:141
10050610,0irq/346-48484003-21ksoftirqd/007:28:590
81600,0rcu_preempt3-21ksoftirqd/009:34:480
81600,0rcu_preempt19-21ksoftirqd/112:22:591
81590,0rcu_preempt19-21ksoftirqd/112:04:261
81590,0rcu_preempt19-21ksoftirqd/110:01:121
81580,0rcu_preempt54-21kswapd010:50:111
81580,0rcu_preempt19-21ksoftirqd/112:10:351
81580,0rcu_preempt13711-1kworker/1:0H07:59:221
81580,0rcu_preempt13711-1kworker/1:0H07:59:221
81570,0rcu_preempt3-21ksoftirqd/012:07:530
81570,0rcu_preempt19-21ksoftirqd/112:34:331
81570,0rcu_preempt19-21ksoftirqd/109:42:221
220872570,0sleep010050irq/346-484840008:22:290
81560,0rcu_preempt54-21kswapd007:45:021
81560,0rcu_preempt3-21ksoftirqd/012:29:420
81560,0rcu_preempt3-21ksoftirqd/008:44:410
86412550,0sleep09950irq/345-484840012:03:310
81550,0rcu_preempt3-21ksoftirqd/011:39:330
81550,0rcu_preempt3-21ksoftirqd/011:39:330
81550,0rcu_preempt3-21ksoftirqd/007:09:330
81540,0rcu_preempt3-21ksoftirqd/008:39:330
81540,0rcu_preempt19-21ksoftirqd/107:26:441
81540,0rcu_preempt10050irq/346-484840007:29:550
81540,0rcu_preempt10050irq/346-484840007:29:550
10050540,0irq/346-484840054-21kswapd012:36:410
81530,0rcu_preempt3-21ksoftirqd/010:19:400
81530,0rcu_preempt19-21ksoftirqd/107:14:341
81530,0rcu_preempt10050irq/346-484840007:36:460
81530,0rcu_preempt10050irq/346-484840007:36:460
10050530,0irq/346-484840030962-1kworker/0:2H11:51:350
81520,0rcu_preempt3-21ksoftirqd/011:24:470
81520,0rcu_preempt3-21ksoftirqd/011:19:340
81520,0rcu_preempt3-21ksoftirqd/009:04:340
81520,0rcu_preempt17487-21kworker/0:109:33:520
81520,0rcu_preempt0-21swapper/111:07:121
81520,0rcu_preempt0-21swapper/108:04:411
10050520,0irq/346-484840012613-1kworker/0:0H10:49:520
10050520,0irq/346-48484000-21swapper/011:31:140
81510,0rcu_preempt3-21ksoftirqd/012:16:030
81510,0rcu_preempt3-21ksoftirqd/010:29:350
81510,0rcu_preempt3-21ksoftirqd/009:54:060
81510,0rcu_preempt3-21ksoftirqd/008:49:490
81510,0rcu_preempt3-21ksoftirqd/007:49:360
81510,0rcu_preempt19-21ksoftirqd/108:09:591
81510,0rcu_preempt13426-21kworker/0:112:09:340
131852510,0sleep09950irq/345-484840010:03:550
81500,0rcu_preempt9696-21kworker/0:111:08:380
81500,0rcu_preempt9696-21kworker/0:111:01:390
81500,0rcu_preempt29715-21ssh12:26:260
81500,0rcu_preempt19-21ksoftirqd/107:59:511
9950490,0irq/345-48484000-21swapper/007:45:230
9950490,0irq/345-48484000-21swapper/007:42:530
81490,0rcu_preempt3-21ksoftirqd/008:14:340
81490,0rcu_preempt3-21ksoftirqd/007:14:380
81490,0rcu_preempt3-21ksoftirqd/007:04:450
81490,0rcu_preempt22061-21kworker/0:009:18:140
81490,0rcu_preempt2170-21apt-get09:49:331
10050490,0irq/346-484840012248-21ssh09:19:350
81480,0rcu_preempt19-21ksoftirqd/108:29:341
10050480,0irq/346-484840030962-1kworker/0:2H11:59:220
81470,0rcu_preempt3-21ksoftirqd/010:12:350
81470,0rcu_preempt3-21ksoftirqd/009:44:050
81470,0rcu_preempt19-21ksoftirqd/107:38:531
81470,0rcu_preempt19-21ksoftirqd/107:38:531
81460,0rcu_preempt3-21ksoftirqd/008:54:430
81460,0rcu_preempt3-21ksoftirqd/008:34:350
81460,0rcu_preempt19-21ksoftirqd/112:33:311
81460,0rcu_preempt19-21ksoftirqd/108:39:361
81460,0rcu_preempt19-21ksoftirqd/108:14:551
4350460,0irq/32-433000000-21swapper/008:29:380
9950450,0irq/345-48484006950-1kworker/1:1H11:22:421
81450,0rcu_preempt19-21ksoftirqd/108:59:401
81450,0rcu_preempt19-21ksoftirqd/107:21:221
81440,0rcu_preempt19-21ksoftirqd/108:24:371
81440,0rcu_preempt19-21ksoftirqd/108:24:371
81440,0rcu_preempt1711-21diskstats08:59:390
81430,0rcu_preempt3-21ksoftirqd/007:19:390
81430,0rcu_preempt19-21ksoftirqd/111:43:351
81430,0rcu_preempt19-21ksoftirqd/111:43:351
81430,0rcu_preempt19-21ksoftirqd/108:44:401
81420,0rcu_preempt19-21ksoftirqd/110:45:041
81420,0rcu_preempt19-21ksoftirqd/110:35:551
81420,0rcu_preempt19-21ksoftirqd/109:04:231
81420,0rcu_preempt19-21ksoftirqd/107:50:401
81400,0rcu_preempt19-21ksoftirqd/111:51:251
81400,0rcu_preempt19-21ksoftirqd/110:15:171
81400,0rcu_preempt19-21ksoftirqd/109:15:131
81400,0rcu_preempt19-21ksoftirqd/108:36:331
81390,0rcu_preempt19-21ksoftirqd/108:52:341
81380,0rcu_preempt31302-21users07:09:531
81370,0rcu_preempt19-21ksoftirqd/107:04:391
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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