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2026-07-25 - 12:10

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 Sat Jul 25, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2581329077,9sleep00-21swapper/019:06:210
2590628465,15sleep20-21swapper/219:07:322
2603728059,6sleep10-21swapper/119:09:161
2592727966,9sleep30-21swapper/319:07:493
37532680,0sleep30-21swapper/321:57:463
280022550,0sleep30-21swapper/323:48:263
255352480,0sleep10-21swapper/122:30:141
192532290,2sleep119252-21munin-plugin-st23:05:001
2617999270,0cyclictest0-21swapper/000:05:520
2618699251,23cyclictest23798-21sh22:47:572
2618699240,6cyclictest0-21swapper/222:57:292
2618699240,24cyclictest0-21swapper/222:09:342
2618499240,1cyclictest0-21swapper/123:10:231
2617999240,0cyclictest0-21swapper/022:22:530
2618699230,22cyclictest0-21swapper/221:45:532
26179992321,1cyclictest0-21swapper/021:10:270
26186992120,1cyclictest0-21swapper/222:41:242
26184992118,2cyclictest10463-21grep20:50:171
2618699197,2cyclictest7856-21latency_hist00:15:002
2618699190,19cyclictest0-21swapper/221:36:402
2618699190,17cyclictest0-21swapper/221:24:022
26184991917,2cyclictest0-21swapper/121:58:531
2618499190,17cyclictest0-21swapper/122:57:361
2617999190,1cyclictest0-21swapper/022:52:520
2618999180,3cyclictest0-21swapper/322:55:143
2618999180,1cyclictest8602-21ssh22:20:153
2618499184,8cyclictest0-21swapper/100:39:491
26184991811,6cyclictest0-21swapper/100:05:151
26179991817,1cyclictest0-21swapper/022:11:370
2617999180,17cyclictest0-21swapper/023:19:190
2618999170,2cyclictest0-21swapper/300:31:363
26186991716,1cyclictest0-21swapper/223:48:132
2618699170,17cyclictest0-21swapper/223:59:432
2618699170,0cyclictest0-21swapper/221:56:532
26184991712,3cyclictest22631-21ls23:25:251
2618499170,17cyclictest0-21swapper/123:49:031
2617999172,9cyclictest0-21swapper/020:55:140
26179991715,1cyclictest0-21swapper/022:08:480
2618999160,0cyclictest0-21swapper/300:02:233
26186991615,1cyclictest0-21swapper/221:52:402
26186991615,1cyclictest0-21swapper/200:08:332
2618699160,0cyclictest0-21swapper/223:12:302
26184991615,1cyclictest0-21swapper/122:14:431
26184991614,1cyclictest0-21swapper/122:46:461
2617999160,1cyclictest0-21swapper/022:01:030
2618999150,15cyclictest0-21swapper/322:19:363
26186991515,0cyclictest0-21swapper/223:33:092
26186991515,0cyclictest0-21swapper/222:03:152
26186991514,1cyclictest0-21swapper/222:29:032
2618699150,15cyclictest0-21swapper/222:23:292
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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