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2025-11-29 - 02:27

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #8

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: 50 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack9slot8s.osadl.org (updated Fri Nov 28, 2025 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3245221210,0chrt32171-21kworker/u2:107:08:250
81850840,0irq/46-4a10000030701-21ssh09:35:070
81850800,0irq/46-4a1000006922-21ssh09:53:400
81850800,0irq/46-4a10000015605-21ssh12:29:520
192262808,0sleep019240-21ssh11:28:270
81950790,0irq/47-4a10000025190-21kworker/u2:207:20:000
81950790,0irq/47-4a10000010724-21diskmemload11:10:050
81850790,0irq/46-4a1000003942-21ssh10:55:280
81850790,0irq/46-4a10000030832-21ssh11:53:070
81850790,0irq/46-4a10000028240-21ssh10:38:400
81850790,0irq/46-4a10000018572-21ssh12:36:010
81850790,0irq/46-4a10000015884-21ssh12:30:140
81850790,0irq/46-4a10000010703-21ssh10:01:280
81950780,0irq/47-4a1000008239-21apt07:59:510
81950780,0irq/47-4a1000001130-21munin-run10:49:590
81850780,0irq/46-4a1000006576-21ssh12:10:260
81850780,0irq/46-4a10000028315-21ssh11:47:430
81850780,0irq/46-4a10000020319-21sh09:13:240
81850780,0irq/46-4a10000015175-21ssh10:11:010
81950770,0irq/47-4a1000005097-21idleruntime-cro09:49:560
81950770,0irq/47-4a1000001384-21ssh11:59:340
81850770,0irq/46-4a1000002521-21ssh10:52:510
81950760,0irq/47-4a1000006039-21awk07:44:520
81950760,0irq/47-4a10000020378-21ssh10:21:540
81950760,0irq/47-4a10000017277-21ssh10:15:120
81950760,0irq/47-4a10000014485-21kworker/u2:509:04:540
81850760,0irq/46-4a1000004895-21kworker/u2:207:39:520
81850760,0irq/46-4a10000028921-21ssh09:31:220
81850760,0irq/46-4a10000025115-21ssh11:40:410
81850760,0irq/46-4a10000012571-21ssh10:05:250
81252760,0sleep025779-21kworker/u2:509:56:080
81950750,0irq/47-4a1000008892-21rm11:06:130
81850750,0irq/46-4a1000005436-21ssh12:08:060
81850750,0irq/46-4a10000015993-21kworker/u2:209:15:080
81950740,0irq/47-4a10000015687-21latency_hist08:49:550
81950740,0irq/47-4a10000012611-21sshd08:29:190
81850740,0irq/46-4a10000027762-21seq09:28:590
81850740,0irq/46-4a100000110352chrt12:20:040
81950730,0irq/47-4a1000002135-21munin-run07:19:530
81950730,0irq/47-4a1000001916-21runrttasks09:43:040
81950730,0irq/47-4a1000001777-21runrttasks12:00:090
81950730,0irq/47-4a10000011117-21sshd08:19:190
81850730,0irq/46-4a10000022758-21kworker/u2:010:40:380
75692730,0chrt6289-21kworker/u2:007:54:540
180762730,0sleep015993-21kworker/u2:209:05:290
129002730,0chrt9739-21kworker/u2:208:30:430
81950720,0irq/47-4a10000013764-21ssh11:16:430
81850720,0irq/46-4a1000009286-21runrttasks08:06:270
64652720,0chrt2650-21kworker/u2:407:47:300
34582720,0chrt2650-21kworker/u2:407:27:070
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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