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2026-08-04 - 18:04

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 Aug 04, 2026 12:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2681729685,6sleep00-21swapper/007:06:390
2702729065,9sleep20-21swapper/207:09:222
2703628671,11sleep10-21swapper/107:09:291
2693928471,9sleep30-21swapper/307:08:143
27163992524,1cyclictest0-21swapper/012:29:540
2716399250,0cyclictest0-21swapper/009:35:450
2716999240,1cyclictest0-21swapper/209:34:372
27167992322,1cyclictest0-21swapper/109:16:041
2716799230,1cyclictest27312-21ntpq08:15:211
2717299220,1cyclictest0-21swapper/312:35:023
2716999220,1cyclictest0-21swapper/210:45:432
27169992119,1cyclictest22515-21ssh12:05:142
2716999210,20cyclictest0-21swapper/211:00:072
2716799210,21cyclictest0-21swapper/109:25:581
2717299202,11cyclictest0-21swapper/311:40:153
2717299202,11cyclictest0-21swapper/311:40:143
2716999209,3cyclictest477-21rs:main2
27169992019,1cyclictest0-21swapper/209:57:232
27169992019,1cyclictest0-21swapper/209:54:362
2716999200,20cyclictest0-21swapper/212:14:232
2716999200,19cyclictest0-21swapper/209:12:542
2716799200,1cyclictest0-21swapper/112:29:331
2716799200,1cyclictest0-21swapper/111:16:391
2716799200,19cyclictest0-21swapper/109:22:181
2716399208,6cyclictest12820-21munin-run08:55:010
2716399200,1cyclictest0-21swapper/010:33:010
2716999190,19cyclictest0-21swapper/211:53:432
2716799190,14cyclictest0-21swapper/109:14:301
27163991917,1cyclictest0-21swapper/011:26:140
2716399190,1cyclictest0-21swapper/010:00:080
2717299180,17cyclictest0-21swapper/309:28:443
27169991810,5cyclictest0-21swapper/211:45:522
2716999180,3cyclictest0-21swapper/212:35:002
2716999180,18cyclictest0-21swapper/211:31:482
2716999180,18cyclictest0-21swapper/209:25:592
2716999180,15cyclictest0-21swapper/211:23:432
2716799180,1cyclictest13307-21aten2_r7power_v11:40:161
2716799180,1cyclictest13307-21aten2_r7power_v11:40:161
2716799180,17cyclictest0-21swapper/109:48:411
27172991716,1cyclictest0-21swapper/311:06:313
2717299170,16cyclictest0-21swapper/311:15:213
27169991716,1cyclictest0-21swapper/212:29:552
2716999170,1cyclictest0-21swapper/211:07:482
27167991713,1cyclictest0-21swapper/112:12:551
2716399173,13cyclictest0-21swapper/008:35:130
27163991716,1cyclictest20178-21diskmemload12:38:050
2716399170,16cyclictest0-21swapper/010:49:360
2717299163,10cyclictest11511-21python10:40:263
2717299160,16cyclictest0-21swapper/311:14:113
27169991615,1cyclictest0-21swapper/210:41:422
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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