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2025-12-06 - 19:00

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 100 highest latencies:
System rack9slot8s.osadl.org (updated Sat Dec 06, 2025 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
819501560,0irq/47-4a10000019754-21kworker/u2:407:06:190
81850850,0irq/46-4a10000011697-21ssh10:28:030
81850850,0irq/46-4a1000001143-21chrt10:05:290
81850840,0irq/46-4a10000019724-21ssh11:54:090
81850820,0irq/46-4a10000021486-21ssh11:57:500
81950810,0irq/47-4a10000024120-21sshd07:25:340
81950810,0irq/47-4a10000018017-21ssh10:41:250
81850810,0irq/46-4a10000031946-21ssh11:11:080
81850810,0irq/46-4a10000024696-21ssh10:55:380
81850810,0irq/46-4a10000013967-21kworker/u2:711:43:340
270552810,0chrt24506-21kworker/u2:009:51:360
81850800,0irq/46-4a1000004011-21ssh10:11:390
81850800,0irq/46-4a1000003553-21kworker/u2:208:44:550
81850800,0irq/46-4a10000013401-21ssh09:22:450
81850800,0irq/46-4a10000010215-21ssh09:16:010
759828010,0sleep07604-21ssh09:10:290
81950790,0irq/47-4a1000006498-21run-parts10:16:570
81950790,0irq/47-4a10000031933-21ssh12:20:020
81950790,0irq/47-4a10000029127-21sendmail07:59:520
81850790,0irq/46-4a1000009425-21ssh10:23:120
81850790,0irq/46-4a1000008039-21ssh11:29:250
81850790,0irq/46-4a1000005374-21ssh11:23:410
81850790,0irq/46-4a1000002878-21ssh11:18:250
81850790,0irq/46-4a10000021926-21seq10:49:540
81850790,0irq/46-4a10000013715-21ssh10:32:210
81950780,0irq/47-4a10000021849-21rm09:40:330
81950780,0irq/47-4a10000015874-21ssh09:27:520
81850780,0irq/46-4a100000822-21ssh10:04:580
81850780,0irq/46-4a10000032337-21ssh12:20:390
81850780,0irq/46-4a10000024255-21ssh09:45:270
81850780,0irq/46-4a10000023391-21ssh10:52:570
304602786,0sleep030469-21ssh09:59:000
235042780,0chrt22731-21kworker/u2:007:21:310
81850770,0irq/46-4a10000028412-21ssh11:03:400
81850770,0irq/46-4a10000023163-21ssh12:01:160
256762770,0chrt25648-21kworker/u2:207:36:160
215402770,0chrt6367-21kworker/u2:107:11:130
81950760,0irq/47-4a1000005755-21munin-run08:59:560
81950760,0irq/47-4a10000031189-21rm11:09:390
81950760,0irq/47-4a1000002793-21munin-run08:39:550
81850760,0irq/46-4a1000002003-21modprobe12:25:050
81850760,0irq/46-4a10000015830-21ssh11:45:510
81850760,0irq/46-4a10000013967-21kworker/u2:712:15:010
67592760,0chrt3865-21kworker/u2:009:06:090
101312760,0chrt9158-21kworker/u2:311:33:510
81950750,0irq/47-4a10000029441-21kworker/u2:008:24:540
81950750,0irq/47-4a10000025399-21munin-run07:34:530
81950750,0irq/47-4a1000001110-21apt-get08:29:540
226882750,0sleep021237-21kworker/u2:307:16:110
197432750,0chrt17723-21kworker/u2:209:36:050
81950740,0irq/47-4a1000007366-21ssh12:36:300
81950740,0irq/47-4a100000625-21kworker/u2:208:29:590
81950740,0irq/47-4a1000003909-21runrttasks08:47:020
81950740,0irq/47-4a10000027918-21kworker/u2:407:54:540
81950740,0irq/47-4a10000019127-21munin-run09:34:550
81950740,0irq/47-4a10000010894-21ssh11:35:200
81850740,0irq/46-4a10000029857-21runrttasks08:04:530
81850740,0irq/46-4a10000020785-21kworker/u2:112:06:140
46032740,0chrt625-21kworker/u2:208:51:430
265772740,0chrt23529-21kworker/u2:107:42:250
304222730,0sleep029441-21kworker/u2:008:08:420
81950720,0irq/47-4a1000004690-21ssh12:30:470
81950720,0irq/47-4a10000027450-21sshd07:48:350
81950720,0irq/47-4a10000013216-21kworker/u2:010:35:250
320152720,0chrt29441-21kworker/u2:008:19:390
81950710,0irq/47-4a1000006505-21munin-run09:04:540
81950710,0irq/47-4a10000030798-21runrttasks08:10:460
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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