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2025-11-28 - 14:50

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 highest latencies:
System rack9slot8s.osadl.org (updated Fri Nov 28, 2025 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1011510,0ktimersoftd/06547-21kworker/0:219:06:140
81950900,0irq/47-4a10000011156-21kworker/u2:019:39:590
81950880,0irq/47-4a10000013377-21latency_hist23:00:010
81950850,0irq/47-4a1000008390-21memory19:14:580
81950850,0irq/47-4a10000019722-21sshd00:22:260
81850850,0irq/46-4a1000004308-21runrttasks21:32:140
81950840,0irq/47-4a10000031646-21sh22:29:560
81950840,0irq/47-4a10000029239-21kworker/u2:021:39:280
81950830,0irq/47-4a10000031652-21ssh21:21:270
81950830,0irq/47-4a10000029971-21ssh23:35:060
81950830,0irq/47-4a10000029392-21ssh23:34:040
81950830,0irq/47-4a10000028161-21rm22:22:280
81950830,0irq/47-4a10000021359-21cron20:39:540
81950830,0irq/47-4a10000018671-21ssh22:02:290
81950830,0irq/47-4a10000012261-21kworker/u2:519:59:540
81950830,0irq/47-4a10000011943-21kworker/u2:223:09:590
81850830,0irq/46-4a1000006983-21ssh23:55:160
81850830,0irq/46-4a10000016214-21ssh21:57:200
81950820,0irq/47-4a1000009688-21ssh00:01:020
81950820,0irq/47-4a1000009561-21kworker/u2:023:13:160
81950820,0irq/47-4a1000008151-21munin-run19:14:520
81950820,0irq/47-4a1000006148-21rm22:44:300
81950820,0irq/47-4a1000004280-21rm23:49:430
81950820,0irq/47-4a10000027938-21lockfile-remove00:40:030
81950820,0irq/47-4a10000025135-21dpkg23:25:040
81950820,0irq/47-4a10000024545-21munin-run20:59:550
81950820,0irq/47-4a10000023803-21awk20:54:540
81950820,0irq/47-4a10000015726-21ssh00:14:030
81950820,0irq/47-4a10000010527-21sshd21:45:150
81950820,0irq/47-4a10000010207-21sshd19:25:070
81850820,0irq/46-4a10000017864-21ssh00:18:340
81850820,0irq/46-4a10000010024-21runrttasks22:52:430
81950810,0irq/47-4a1000006675-21ssh22:45:270
81950810,0irq/47-4a10000025549-21kworker/u2:121:10:030
81950810,0irq/47-4a10000025387-21runrttasks22:16:390
81850810,0irq/46-4a10000025578-21ssh23:25:400
81850810,0irq/46-4a10000020682-21ssh22:06:420
81950800,0irq/47-4a1000003171-21munin-run21:29:560
81950800,0irq/47-4a10000013204-21ssh21:50:570
81950800,0irq/47-4a10000012283-21munin-run19:39:540
81850800,0irq/46-4a1000009397-21ssh21:42:590
81850800,0irq/46-4a10000030578-21ssh21:19:210
81850800,0irq/46-4a10000023524-21ssh22:12:460
81850800,0irq/46-4a10000023207-21modprobe00:30:000
81850800,0irq/46-4a10000012249-21ssh00:06:320
81950790,0irq/47-4a10000024614-21ssh00:32:560
81950790,0irq/47-4a10000015374-21ssh23:04:120
81950790,0irq/47-4a10000015184-21lldpd20:27:330
81950780,0irq/47-4a10000025291-21latency_hist21:04:560
81950780,0irq/47-4a10000022664-21ssh23:19:520
81950780,0irq/47-4a10000016532-21kworker/u2:020:09:550
81850780,0irq/46-4a100000487-21ssh23:41:290
183552780,0chrt17906-21kworker/u2:320:19:320
135362780,0chrt13501-21kworker/u2:219:46:310
81950770,0irq/47-4a10000021365-21kworker/u2:420:45:030
81950770,0irq/47-4a10000020640-21apt20:34:530
81950770,0irq/47-4a10000014463-21sshd19:53:070
81850770,0irq/46-4a100000635-21ssh22:32:560
81850770,0irq/46-4a1000002193-21ssh22:36:050
81950760,0irq/47-4a1000006942-21kworker/u2:119:24:510
81850760,0irq/46-4a1000005660-21runrttasks23:52:330
81850760,0irq/46-4a10000011541-21munin-run19:34:520
218112760,0chrt19469-21kworker/u2:220:42:220
81950750,0irq/47-4a10000016935-21idleruntime-cro20:09:530
190122750,0chrt18691-21kworker/u2:720:23:420
156462740,0sleep014249-21kworker/u2:020:00:280
81950730,0irq/47-4a10000024870-21runrttasks21:01:350
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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