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2026-08-01 - 18:20

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 Aug 01, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81980,0rcu_preempt3-21ksoftirqd/011:33:080
81940,0rcu_preempt19-21ksoftirqd/109:59:271
81880,0rcu_preempt19-21ksoftirqd/112:25:371
81880,0rcu_preempt19-21ksoftirqd/111:16:491
81750,0rcu_preempt3-21ksoftirqd/011:52:420
81750,0rcu_preempt3-21ksoftirqd/010:56:320
10050740,0irq/346-484840021782-1kworker/0:1H11:36:380
81730,0rcu_preempt3-21ksoftirqd/009:43:460
81720,0rcu_preempt3-21ksoftirqd/012:08:080
81720,0rcu_preempt3-21ksoftirqd/010:39:270
81720,0rcu_preempt3-21ksoftirqd/010:08:570
81720,0rcu_preempt3-21ksoftirqd/010:08:570
81710,0rcu_preempt3-21ksoftirqd/012:32:420
81710,0rcu_preempt3-21ksoftirqd/011:42:180
81710,0rcu_preempt3-21ksoftirqd/011:00:420
81710,0rcu_preempt3-21ksoftirqd/010:27:280
81710,0rcu_preempt3-21ksoftirqd/009:55:510
81700,0rcu_preempt54-21kswapd007:55:101
10050700,0irq/346-484840024321-1kworker/0:0H11:05:220
81690,0rcu_preempt3-21ksoftirqd/011:29:090
81690,0rcu_preempt3-21ksoftirqd/010:12:350
81690,0rcu_preempt3-21ksoftirqd/009:46:090
81690,0rcu_preempt3-21ksoftirqd/009:37:140
81690,0rcu_preempt3-21ksoftirqd/009:15:050
81680,0rcu_preempt3-21ksoftirqd/010:44:300
81680,0rcu_preempt3-21ksoftirqd/010:17:320
81680,0rcu_preempt3-21ksoftirqd/010:02:390
81680,0rcu_preempt3-21ksoftirqd/009:26:070
81680,0rcu_preempt3-21ksoftirqd/009:23:290
10050680,0irq/346-48484009662-21apt-get11:20:090
81670,0rcu_preempt3-21ksoftirqd/012:24:430
81670,0rcu_preempt3-21ksoftirqd/011:10:190
81670,0rcu_preempt3-21ksoftirqd/010:22:320
81670,0rcu_preempt3-21ksoftirqd/009:11:480
81660,0rcu_preempt3-21ksoftirqd/011:48:050
81650,0rcu_preempt3-21ksoftirqd/009:30:260
111650,0rcuc/018783-21ssh12:01:080
81640,0rcu_preempt3-21ksoftirqd/012:10:200
81630,0rcu_preempt54-21kswapd012:15:270
81600,0rcu_preempt19-21ksoftirqd/108:05:101
81580,0rcu_preempt9459-21diskmemload12:27:410
81580,0rcu_preempt19-21ksoftirqd/112:38:511
81570,0rcu_preempt19-21ksoftirqd/111:35:261
81570,0rcu_preempt19-21ksoftirqd/109:40:191
153192570,0chrt10050irq/346-484840007:47:000
153192570,0chrt10050irq/346-484840007:47:000
81550,0rcu_preempt22305-21kworker/0:108:13:100
81550,0rcu_preempt0-21swapper/108:10:251
81540,0rcu_preempt3-21ksoftirqd/008:23:520
81540,0rcu_preempt3-21ksoftirqd/007:15:070
81540,0rcu_preempt3-21ksoftirqd/007:15:070
81530,0rcu_preempt19-21ksoftirqd/108:00:221
81530,0rcu_preempt17239-21kworker/0:208:00:070
81520,0rcu_preempt3-21ksoftirqd/012:35:140
81520,0rcu_preempt3-21ksoftirqd/008:09:580
81510,0rcu_preempt3-21ksoftirqd/011:18:040
10050510,0irq/346-48484009328-1kworker/0:2H10:47:240
10050510,0irq/346-484840014297-1kworker/0:2H09:50:470
81500,0rcu_preempt3-21ksoftirqd/011:58:270
81500,0rcu_preempt3-21ksoftirqd/009:05:090
81500,0rcu_preempt19-21ksoftirqd/111:55:151
81500,0rcu_preempt19-21ksoftirqd/110:06:461
81500,0rcu_preempt19-21ksoftirqd/110:06:461
81490,0rcu_preempt3-21ksoftirqd/008:35:160
81490,0rcu_preempt18653-21ping08:15:090
81480,0rcu_preempt9459-21diskmemload09:26:041
81480,0rcu_preempt3-21ksoftirqd/010:30:180
81480,0rcu_preempt17392-21apt-get07:55:080
81470,0rcu_preempt3-21ksoftirqd/007:30:170
81470,0rcu_preempt19-21ksoftirqd/112:03:091
81470,0rcu_preempt19-21ksoftirqd/111:50:241
81470,0rcu_preempt19-21ksoftirqd/110:58:221
81470,0rcu_preempt19-21ksoftirqd/109:05:091
81470,0rcu_preempt19-21ksoftirqd/107:05:081
81460,0rcu_preempt6340-21apt-get09:00:100
81460,0rcu_preempt6340-21apt-get09:00:100
81460,0rcu_preempt5771-21ping07:19:591
81460,0rcu_preempt5771-21ping07:19:591
81460,0rcu_preempt19-21ksoftirqd/111:05:491
81460,0rcu_preempt19-21ksoftirqd/110:41:411
81460,0rcu_preempt19-21ksoftirqd/107:25:181
81450,0rcu_preempt3-21ksoftirqd/007:10:190
81450,0rcu_preempt3-21ksoftirqd/007:05:180
81450,0rcu_preempt19-21ksoftirqd/108:15:011
81440,0rcu_preempt3-21ksoftirqd/008:25:250
81440,0rcu_preempt19-21ksoftirqd/112:20:221
81440,0rcu_preempt19-21ksoftirqd/112:05:091
81440,0rcu_preempt19-21ksoftirqd/111:11:541
81440,0rcu_preempt19-21ksoftirqd/111:00:141
81440,0rcu_preempt1586-21df_abs08:45:120
10050440,0irq/346-48484000-21swapper/010:52:090
81430,0rcu_preempt5771-21ping07:35:250
81430,0rcu_preempt3-21ksoftirqd/008:50:200
81430,0rcu_preempt19-21ksoftirqd/112:15:271
81430,0rcu_preempt19-21ksoftirqd/111:48:591
81430,0rcu_preempt19-21ksoftirqd/111:24:461
81430,0rcu_preempt19-21ksoftirqd/109:10:211
81420,0rcu_preempt9459-21diskmemload09:46:491
81420,0rcu_preempt4872-21df_abs08:55:140
81420,0rcu_preempt3-21ksoftirqd/008:40:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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