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2026-09-24 - 19:12

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 Thu Sep 24, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811250,0rcu_preempt19-21ksoftirqd/109:20:011
81950,0rcu_preempt19-21ksoftirqd/110:35:231
81950,0rcu_preempt19-21ksoftirqd/110:35:231
81920,0rcu_preempt19-21ksoftirqd/110:55:231
81920,0rcu_preempt19-21ksoftirqd/110:00:241
81900,0rcu_preempt19-21ksoftirqd/111:20:211
81900,0rcu_preempt19-21ksoftirqd/111:20:211
81870,0rcu_preempt19-21ksoftirqd/108:55:271
81850,0rcu_preempt17018-1kworker/1:1H08:00:021
81820,0rcu_preempt19-21ksoftirqd/109:15:271
81820,0rcu_preempt13815-21php-cgi07:50:011
81780,0rcu_preempt19-21ksoftirqd/112:00:171
81750,0rcu_preempt19-21ksoftirqd/108:35:131
81700,0rcu_preempt19-21ksoftirqd/110:00:011
81700,0rcu_preempt19-21ksoftirqd/109:41:301
81680,0rcu_preempt31419-21ssh09:33:080
81670,0rcu_preempt3-21ksoftirqd/009:55:350
81670,0rcu_preempt19-21ksoftirqd/111:00:291
81670,0rcu_preempt19-21ksoftirqd/111:00:291
81660,0rcu_preempt3-21ksoftirqd/011:40:240
81650,0rcu_preempt25989-21ssh11:36:200
81650,0rcu_preempt19-21ksoftirqd/111:27:191
81650,0rcu_preempt19-21ksoftirqd/110:08:341
81640,0rcu_preempt3-21ksoftirqd/012:30:230
81640,0rcu_preempt3-21ksoftirqd/010:32:430
81640,0rcu_preempt3-21ksoftirqd/009:44:140
81640,0rcu_preempt3-21ksoftirqd/007:13:030
81640,0rcu_preempt0-21swapper/109:26:031
81630,0rcu_preempt6821-21ssh12:22:120
81630,0rcu_preempt3-21ksoftirqd/012:02:010
81630,0rcu_preempt3-21ksoftirqd/011:34:090
81630,0rcu_preempt3-21ksoftirqd/011:26:280
81630,0rcu_preempt3-21ksoftirqd/011:01:140
81630,0rcu_preempt3-21ksoftirqd/011:01:140
81630,0rcu_preempt3-21ksoftirqd/009:47:200
81630,0rcu_preempt3-21ksoftirqd/009:22:220
81630,0rcu_preempt3-21ksoftirqd/008:25:170
81630,0rcu_preempt3-21ksoftirqd/008:10:180
81630,0rcu_preempt3-21ksoftirqd/007:20:070
81630,0rcu_preempt20646-21ssh12:35:420
81630,0rcu_preempt19-21ksoftirqd/112:17:041
81620,0rcu_preempt3-21ksoftirqd/012:16:210
81620,0rcu_preempt3-21ksoftirqd/010:44:110
81620,0rcu_preempt3-21ksoftirqd/010:18:240
81620,0rcu_preempt3-21ksoftirqd/009:09:440
81610,0rcu_preempt5677-21ssh10:11:330
81610,0rcu_preempt3-21ksoftirqd/012:14:580
81610,0rcu_preempt3-21ksoftirqd/011:10:060
81610,0rcu_preempt3-21ksoftirqd/010:05:070
81610,0rcu_preempt3-21ksoftirqd/009:17:380
81610,0rcu_preempt3-21ksoftirqd/009:13:550
81610,0rcu_preempt3-21ksoftirqd/009:01:240
81610,0rcu_preempt3-21ksoftirqd/008:38:000
81610,0rcu_preempt3-21ksoftirqd/008:05:120
81610,0rcu_preempt21951-21ssh10:28:060
81600,0rcu_preempt3-21ksoftirqd/011:55:310
81600,0rcu_preempt3-21ksoftirqd/011:46:370
81600,0rcu_preempt3-21ksoftirqd/009:52:410
81600,0rcu_preempt18906-21ssh10:57:080
81600,0rcu_preempt12825-21ssh10:50:450
81600,0rcu_preempt0-21swapper/009:29:540
81590,0rcu_preempt3-21ksoftirqd/012:26:200
81590,0rcu_preempt3-21ksoftirqd/011:22:220
81590,0rcu_preempt3-21ksoftirqd/011:22:220
81590,0rcu_preempt3-21ksoftirqd/008:40:540
81590,0rcu_preempt3-21ksoftirqd/007:49:080
81590,0rcu_preempt19-21ksoftirqd/111:50:121
81580,0rcu_preempt3-21ksoftirqd/011:53:340
81580,0rcu_preempt3-21ksoftirqd/010:45:270
81580,0rcu_preempt3-21ksoftirqd/010:02:270
81580,0rcu_preempt3-21ksoftirqd/007:51:560
81580,0rcu_preempt3-21ksoftirqd/007:18:410
81570,0rcu_preempt8042-21ssh11:19:000
81570,0rcu_preempt3-21ksoftirqd/008:48:590
81570,0rcu_preempt3-21ksoftirqd/008:00:020
81570,0rcu_preempt19-21ksoftirqd/110:27:311
81570,0rcu_preempt19-21ksoftirqd/107:55:001
81560,0rcu_preempt3-21ksoftirqd/012:09:470
81560,0rcu_preempt19-21ksoftirqd/111:10:151
81560,0rcu_preempt19-21ksoftirqd/110:50:061
81550,0rcu_preempt3-21ksoftirqd/010:23:560
81550,0rcu_preempt3-21ksoftirqd/007:35:300
81550,0rcu_preempt19-21ksoftirqd/112:20:131
81550,0rcu_preempt19-21ksoftirqd/111:30:291
81540,0rcu_preempt3-21ksoftirqd/011:05:020
81530,0rcu_preempt19-21ksoftirqd/111:45:001
81530,0rcu_preempt1477-21aten_rapower_vo10:40:121
81500,0rcu_preempt3-21ksoftirqd/007:05:160
81500,0rcu_preempt19-21ksoftirqd/107:35:231
81480,0rcu_preempt7604-21diskmemload09:31:171
9950470,0irq/345-484840018392-1kworker/1:0H10:30:371
9950470,0irq/345-484840012676-1kworker/1:1H09:35:151
81470,0rcu_preempt19-21ksoftirqd/112:05:271
10050470,0irq/346-484840011027-1kworker/1:1H12:36:231
9950460,0irq/345-484840013496-1kworker/0:1H08:00:010
81460,0rcu_preempt24195-1kworker/1:1H12:10:181
10050460,0irq/346-48484003903-21ping07:42:260
10050460,0irq/346-48484003903-21ping07:25:190
81450,0rcu_preempt13644-21apt-get10:20:111
10050450,0irq/346-48484002263-21ssh09:35:510
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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