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2025-10-19 - 22:43

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Sun Oct 19, 2025 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811040,0rcu_preempt54-21kswapd010:40:321
81950,0rcu_preempt3-21ksoftirqd/009:33:170
81950,0rcu_preempt3-21ksoftirqd/009:33:170
81940,0rcu_preempt3-21ksoftirqd/009:25:490
81910,0rcu_preempt3-21ksoftirqd/011:30:320
81890,0rcu_preempt19-21ksoftirqd/111:31:551
81750,0rcu_preempt19-21ksoftirqd/110:47:391
81740,0rcu_preempt19-21ksoftirqd/112:21:311
81740,0rcu_preempt19-21ksoftirqd/109:57:111
81730,0rcu_preempt19-21ksoftirqd/107:28:511
81730,0rcu_preempt18822-21ssh09:49:121
81720,0rcu_preempt3-21ksoftirqd/010:48:510
81700,0rcu_preempt19-21ksoftirqd/107:33:321
81690,0rcu_preempt19-21ksoftirqd/111:43:161
81680,0rcu_preempt19-21ksoftirqd/110:18:391
81660,0rcu_preempt19-21ksoftirqd/111:47:531
81660,0rcu_preempt19-21ksoftirqd/109:33:591
81660,0rcu_preempt19-21ksoftirqd/109:33:591
81660,0rcu_preempt19-21ksoftirqd/109:29:181
81640,0rcu_preempt19-21ksoftirqd/111:38:301
81640,0rcu_preempt19-21ksoftirqd/110:25:551
81640,0rcu_preempt19-21ksoftirqd/110:11:011
81630,0rcu_preempt19-21ksoftirqd/112:33:591
81630,0rcu_preempt19-21ksoftirqd/111:16:271
81630,0rcu_preempt19-21ksoftirqd/110:34:581
9950620,0irq/345-4848400181ktimersoftd/112:28:161
81620,0rcu_preempt3-21ksoftirqd/011:10:360
81610,0rcu_preempt19-21ksoftirqd/109:51:211
81610,0rcu_preempt19-21ksoftirqd/109:20:091
81610,0rcu_preempt19-21ksoftirqd/108:20:401
81610,0rcu_preempt19-21ksoftirqd/107:04:481
9950600,0irq/345-48484000-21swapper/012:33:320
81600,0rcu_preempt19-21ksoftirqd/112:05:511
81600,0rcu_preempt19-21ksoftirqd/109:40:531
81580,0rcu_preempt19-21ksoftirqd/112:19:181
81580,0rcu_preempt19-21ksoftirqd/112:19:181
81570,0rcu_preempt3-21ksoftirqd/010:05:220
81570,0rcu_preempt27634-21kworker/0:112:26:150
81560,0rcu_preempt19-21ksoftirqd/111:00:511
9950550,0irq/345-484840081rcu_preempt12:14:451
81550,0rcu_preempt19-21ksoftirqd/110:57:101
81550,0rcu_preempt0-21swapper/110:53:041
81540,0rcu_preempt6345-21apt-get11:00:200
81540,0rcu_preempt3-21ksoftirqd/012:00:110
81540,0rcu_preempt3-21ksoftirqd/008:50:420
81540,0rcu_preempt27649-21memory07:50:311
9950530,0irq/345-484840010608-1kworker/1:1H09:37:261
81530,0rcu_preempt3-21ksoftirqd/011:36:540
81530,0rcu_preempt3-21ksoftirqd/009:57:170
81530,0rcu_preempt3-21ksoftirqd/008:17:040
81530,0rcu_preempt3-21ksoftirqd/008:10:310
81530,0rcu_preempt19-21ksoftirqd/109:13:171
9950520,0irq/345-484840031427-21apt-get10:50:240
81520,0rcu_preempt3-21ksoftirqd/012:25:110
81520,0rcu_preempt3-21ksoftirqd/012:05:340
81520,0rcu_preempt3-21ksoftirqd/010:32:570
81520,0rcu_preempt3-21ksoftirqd/009:45:360
81520,0rcu_preempt3-21ksoftirqd/008:24:540
81520,0rcu_preempt3-21ksoftirqd/007:10:200
81520,0rcu_preempt19-21ksoftirqd/107:15:331
81520,0rcu_preempt13215-21ssh11:09:300
10050520,0irq/346-484840010814-1kworker/0:1H10:26:520
9950510,0irq/345-484840028782-1kworker/1:1H10:35:541
9950510,0irq/345-484840010643-1kworker/1:2H09:05:291
81510,0rcu_preempt54-21kswapd009:05:290
81510,0rcu_preempt3-21ksoftirqd/011:45:590
81510,0rcu_preempt3-21ksoftirqd/009:20:320
81510,0rcu_preempt19-21ksoftirqd/108:18:241
10050510,0irq/346-48484002514-1kworker/0:1H12:16:340
10050510,0irq/346-48484002514-1kworker/0:1H12:16:340
81500,0rcu_preempt3-21ksoftirqd/011:50:250
81500,0rcu_preempt3-21ksoftirqd/010:15:370
81500,0rcu_preempt3-21ksoftirqd/009:17:380
81500,0rcu_preempt3-21ksoftirqd/007:50:360
81500,0rcu_preempt28257-21ping08:05:110
10050500,0irq/346-48484001491-1kworker/0:2H11:41:530
9950490,0irq/345-4848400181ktimersoftd/111:20:181
81490,0rcu_preempt3-21ksoftirqd/011:58:580
81490,0rcu_preempt3-21ksoftirqd/010:10:390
81490,0rcu_preempt3-21ksoftirqd/009:45:110
81490,0rcu_preempt3-21ksoftirqd/008:09:130
81490,0rcu_preempt3-21ksoftirqd/007:47:550
81490,0rcu_preempt26032-21kworker/u4:009:36:560
81490,0rcu_preempt19-21ksoftirqd/107:55:351
81490,0rcu_preempt10830-21df_inode07:00:290
10050490,0irq/346-484840027124-1kworker/0:0H10:02:190
10050490,0irq/346-48484000-21swapper/011:22:420
9950480,0irq/345-48484000-21swapper/009:54:220
81480,0rcu_preempt3-21ksoftirqd/008:42:500
81480,0rcu_preempt19-21ksoftirqd/111:10:351
9950470,0irq/345-484840025175-1kworker/1:2H10:00:141
81470,0rcu_preempt3-21ksoftirqd/007:58:070
10050470,0irq/346-484840031461-21ssh12:13:160
9950460,0irq/345-484840015431-21ping07:40:430
9950460,0irq/345-48484000-21swapper/112:01:541
81460,0rcu_preempt3-21ksoftirqd/010:40:390
81460,0rcu_preempt3-21ksoftirqd/010:38:390
81460,0rcu_preempt3-21ksoftirqd/009:13:580
81460,0rcu_preempt3-21ksoftirqd/008:49:090
81460,0rcu_preempt3-21ksoftirqd/008:34:340
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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