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2026-08-23 - 10:03

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 Sun Aug 23, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2136729476,13sleep20-21swapper/219:06:072
2163829279,9sleep00-21swapper/019:09:380
2150229267,9sleep30-21swapper/319:07:543
2137628878,6sleep10-21swapper/119:06:141
88002530,0sleep30-21swapper/300:00:003
2175199351,2cyclictest32648-21munin-run23:55:001
21751993019,10cyclictest7011-21aten2_r7power_p23:20:141
21751992826,1cyclictest14545-21diskmemload22:26:021
2174799270,18cyclictest0-21swapper/022:06:580
2175199261,5cyclictest358-21ps19:30:211
2174799260,1cyclictest0-21swapper/023:11:260
2175199255,18cyclictest3400-21apt-get00:35:151
2175199242,2cyclictest14545-21diskmemload23:02:321
21751992421,2cyclictest0-21swapper/123:45:131
2175199240,3cyclictest0-21swapper/100:25:121
2175199240,22cyclictest0-21swapper/121:15:431
2174799241,1cyclictest21738-21cyclictest00:32:090
2174799240,0cyclictest0-21swapper/021:42:390
21751992313,9cyclictest132222sleep121:05:191
21751992312,10cyclictest38150irq/131-snd_hda20:10:231
2174799230,1cyclictest0-21swapper/022:39:350
21758992221,1cyclictest0-21swapper/322:05:343
2175899220,21cyclictest0-21swapper/322:47:073
2175199221,3cyclictest14545-21diskmemload22:16:061
2175199220,3cyclictest0-21swapper/121:45:061
2175199220,21cyclictest0-21swapper/119:55:211
2175199220,0cyclictest0-21swapper/100:33:221
2174799220,1cyclictest0-21swapper/000:10:170
2175699210,19cyclictest0-21swapper/223:05:012
2175199216,6cyclictest22232-21ssh21:52:481
2175199211,19cyclictest14545-21diskmemload00:11:011
2175199210,4cyclictest0-21swapper/122:10:191
2175199210,4cyclictest0-21swapper/122:00:571
2175199206,6cyclictest30494-21rm23:15:041
2175199206,6cyclictest30494-21rm23:15:041
2175199203,2cyclictest14545-21diskmemload21:43:481
2175199202,2cyclictest0-21swapper/121:23:051
2175199201,18cyclictest0-21swapper/121:28:431
2175199200,3cyclictest0-21swapper/120:45:281
2175199200,2cyclictest0-21swapper/123:14:131
2175199200,2cyclictest0-21swapper/122:57:551
2175199200,1cyclictest0-21swapper/120:35:141
2174799200,1cyclictest0-21swapper/000:36:480
2175899190,18cyclictest0-21swapper/323:13:463
2175199197,6cyclictest16598-21ssh21:10:231
2175199192,1cyclictest14545-21diskmemload22:08:231
2175199191,2cyclictest14545-21diskmemload23:05:151
2175199191,1cyclictest14545-21diskmemload00:09:161
2174799190,3cyclictest0-21swapper/021:15:500
2174799190,1cyclictest0-21swapper/022:28:530
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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