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2026-06-09 - 09:10

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 here to display the system's profile data or here to proceed to next system.
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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 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 rack7slot7s.osadl.org (updated Tue Jun 09, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
287929886,8sleep00-21swapper/019:08:500
226928864,19sleep20-21swapper/219:05:272
273428764,18sleep10-21swapper/119:06:581
291428673,9sleep30-21swapper/319:09:183
305899260,0cyclictest0-21swapper/122:17:001
305399260,1cyclictest0-21swapper/022:52:180
306399250,0cyclictest0-21swapper/322:30:053
305399250,25cyclictest0-21swapper/021:47:370
306399241,23cyclictest0-21swapper/323:19:173
306099240,21cyclictest0-21swapper/221:53:242
3063992321,1cyclictest0-21swapper/319:15:123
306399230,2cyclictest0-21swapper/300:33:393
3063992222,0cyclictest0-21swapper/323:01:093
3058992222,0cyclictest0-21swapper/100:00:131
305899220,22cyclictest0-21swapper/120:17:221
306099210,17cyclictest0-21swapper/222:00:512
3058992118,3cyclictest0-21swapper/122:30:031
3053992121,0cyclictest0-21swapper/021:41:370
3053992120,1cyclictest0-21swapper/023:10:400
306399200,3cyclictest0-21swapper/322:40:453
306399200,1cyclictest0-21swapper/322:22:143
306099200,16cyclictest0-21swapper/222:44:512
305899200,1cyclictest141rcu_preempt22:23:031
305899200,1cyclictest0-21swapper/121:30:441
305399209,9cyclictest15019-21ssh22:20:140
3063991917,2cyclictest0-21swapper/322:07:203
306399190,2cyclictest0-21swapper/322:58:333
306399190,1cyclictest0-21swapper/323:39:393
306399190,18cyclictest0-21swapper/321:17:303
3060991914,4cyclictest0-21swapper/221:43:022
306099190,2cyclictest141rcu_preempt21:47:562
305899192,1cyclictest141rcu_preempt00:12:221
3058991917,1cyclictest0-21swapper/123:20:141
3058991914,4cyclictest0-21swapper/123:35:011
305899191,1cyclictest28486-21diskmemload22:54:521
305899190,19cyclictest0-21swapper/119:20:121
305399190,1cyclictest0-21swapper/000:33:230
306399180,1cyclictest0-21swapper/323:48:043
306399180,1cyclictest0-21swapper/322:01:523
306099180,17cyclictest0-21swapper/223:42:542
306099180,17cyclictest0-21swapper/200:36:172
305899188,5cyclictest225-21systemd-journal23:04:591
305399187,6cyclictest22287-21munin-run19:50:000
3053991818,0cyclictest0-21swapper/021:16:590
305399180,1cyclictest0-21swapper/022:17:340
79412170,0sleep10-21swapper/123:33:531
3063991716,1cyclictest55750irq/128-enp2s0-00:37:453
306399170,0cyclictest0-21swapper/300:05:303
3060991714,3cyclictest0-21swapper/223:02:422
3060991713,4cyclictest0-21swapper/222:57:552
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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