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2026-06-14 - 01:08

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 Sat Jun 13, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811370,0rcu_preempt3-21ksoftirqd/011:17:470
811280,0rcu_preempt3-21ksoftirqd/008:47:050
811070,0rcu_preempt3-21ksoftirqd/010:52:290
811030,0rcu_preempt3-21ksoftirqd/011:41:530
811020,0rcu_preempt3-21ksoftirqd/009:41:160
81990,0rcu_preempt3-21ksoftirqd/011:11:090
81950,0rcu_preempt3-21ksoftirqd/012:13:170
81850,0rcu_preempt2027-21kworker/0:112:01:090
81810,0rcu_preempt3-21ksoftirqd/012:18:020
81780,0rcu_preempt19-21ksoftirqd/111:57:341
81740,0rcu_preempt7360-21ntpq09:42:581
81730,0rcu_preempt3-21ksoftirqd/011:42:510
81690,0rcu_preempt3-21ksoftirqd/010:04:320
81690,0rcu_preempt0-21swapper/010:46:010
81680,0rcu_preempt3-21ksoftirqd/010:10:550
81680,0rcu_preempt21620-21cat09:57:521
81680,0rcu_preempt20605-21kworker/0:211:47:510
81660,0rcu_preempt4280-21diskmemload09:12:521
81660,0rcu_preempt3-21ksoftirqd/010:27:490
81660,0rcu_preempt3-21ksoftirqd/009:22:580
81650,0rcu_preempt3-21ksoftirqd/012:02:340
81650,0rcu_preempt19-21ksoftirqd/107:38:081
81640,0rcu_preempt31239-21kworker/0:207:30:110
81640,0rcu_preempt19-21ksoftirqd/109:22:451
81630,0rcu_preempt20565-21ssh11:37:160
81630,0rcu_preempt19-21ksoftirqd/111:07:341
81630,0rcu_preempt19-21ksoftirqd/110:12:581
81620,0rcu_preempt3-21ksoftirqd/008:57:440
81620,0rcu_preempt3-21ksoftirqd/008:28:000
81620,0rcu_preempt19-21ksoftirqd/112:32:491
81620,0rcu_preempt19-21ksoftirqd/111:22:331
81620,0rcu_preempt13467-21ping08:07:330
81610,0rcu_preempt3-21ksoftirqd/012:07:430
81610,0rcu_preempt3-21ksoftirqd/009:32:440
81610,0rcu_preempt3-21ksoftirqd/007:12:060
81610,0rcu_preempt30569-21kworker/0:010:17:490
81610,0rcu_preempt1954-1kworker/0:0H07:22:570
81610,0rcu_preempt19-21ksoftirqd/111:52:581
81610,0rcu_preempt19-21ksoftirqd/107:23:021
81610,0rcu_preempt13467-21ping08:17:340
81600,0rcu_preempt3-21ksoftirqd/008:52:580
81600,0rcu_preempt3-21ksoftirqd/008:32:440
81600,0rcu_preempt19-21ksoftirqd/111:05:241
81600,0rcu_preempt15394-21ssh10:57:540
81600,0rcu_preempt13467-21ping08:27:340
81590,0rcu_preempt19-21ksoftirqd/109:07:511
81590,0rcu_preempt19-21ksoftirqd/108:27:451
81580,0rcu_preempt3-21ksoftirqd/010:38:040
81580,0rcu_preempt3-21ksoftirqd/010:33:040
81580,0rcu_preempt3-21ksoftirqd/009:42:430
81580,0rcu_preempt3-21ksoftirqd/008:37:580
81580,0rcu_preempt22250-21df_abs08:22:481
81580,0rcu_preempt19-21ksoftirqd/108:53:001
81570,0rcu_preempt3-21ksoftirqd/012:32:480
81570,0rcu_preempt3-21ksoftirqd/012:28:280
81570,0rcu_preempt3-21ksoftirqd/011:22:450
81570,0rcu_preempt3-21ksoftirqd/010:12:500
81570,0rcu_preempt3-21ksoftirqd/009:52:590
81570,0rcu_preempt29771-21kworker/u4:009:48:020
81570,0rcu_preempt19-21ksoftirqd/110:55:071
81570,0rcu_preempt19-21ksoftirqd/109:37:451
81560,0rcu_preempt3-21ksoftirqd/009:12:460
81560,0rcu_preempt19-21ksoftirqd/111:00:491
81560,0rcu_preempt19-21ksoftirqd/110:50:311
81560,0rcu_preempt19-21ksoftirqd/109:54:311
81550,0rcu_preempt530-21ping07:42:330
81550,0rcu_preempt3-21ksoftirqd/012:23:440
81550,0rcu_preempt3-21ksoftirqd/011:52:490
81550,0rcu_preempt3-21ksoftirqd/011:07:330
81550,0rcu_preempt3-21ksoftirqd/009:28:000
81550,0rcu_preempt3-21ksoftirqd/008:47:470
81550,0rcu_preempt19-21ksoftirqd/111:52:131
81550,0rcu_preempt19-21ksoftirqd/110:23:011
81550,0rcu_preempt12203-21apt-get07:52:430
10050550,0irq/346-48484006858-1kworker/1:0H12:31:521
81540,0rcu_preempt3-21ksoftirqd/010:57:250
81540,0rcu_preempt3-21ksoftirqd/009:02:590
81540,0rcu_preempt19-21ksoftirqd/112:16:011
81540,0rcu_preempt19-21ksoftirqd/110:04:291
10050540,0irq/346-4848400111rcuc/009:58:230
81530,0rcu_preempt3-21ksoftirqd/009:08:430
81530,0rcu_preempt19-21ksoftirqd/110:43:121
81530,0rcu_preempt19-21ksoftirqd/109:28:341
81530,0rcu_preempt19-21ksoftirqd/108:34:441
81530,0rcu_preempt13748-21meminfo10:22:580
10050530,0irq/346-484840054-21kswapd010:10:031
81520,0rcu_preempt3-21ksoftirqd/011:32:280
81520,0rcu_preempt3-21ksoftirqd/011:32:280
81520,0rcu_preempt3-21ksoftirqd/011:14:270
81520,0rcu_preempt19-21ksoftirqd/112:12:101
81520,0rcu_preempt19-21ksoftirqd/110:32:541
81520,0rcu_preempt19-21ksoftirqd/108:07:511
81520,0rcu_preempt19-21ksoftirqd/107:52:591
81520,0rcu_preempt19-21ksoftirqd/107:32:041
81510,0rcu_preempt3-21ksoftirqd/008:07:460
81510,0rcu_preempt3-21ksoftirqd/007:57:450
81510,0rcu_preempt16620-21ssh09:19:200
81500,0rcu_preempt3-21ksoftirqd/007:47:470
81500,0rcu_preempt20433-21apt-get08:17:440
81500,0rcu_preempt19-21ksoftirqd/112:22:551
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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