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2026-09-01 - 21:28

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 Sep 01, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3211529380,9sleep20-21swapper/207:07:042
3232629279,9sleep00-21swapper/007:09:460
3221328564,6sleep30-21swapper/307:08:213
3210928366,13sleep10-21swapper/107:06:581
215302530,0sleep20-21swapper/212:00:472
3243099260,24cyclictest0-21swapper/209:28:192
3243099240,24cyclictest0-21swapper/211:19:272
3243099240,23cyclictest0-21swapper/209:47:532
70182230,1sleep30-21swapper/311:33:233
3243099230,2cyclictest0-21swapper/211:44:172
32430992219,2cyclictest0-21swapper/212:05:342
3243099220,21cyclictest0-21swapper/211:25:132
3242099220,20cyclictest0-21swapper/012:34:500
3243099210,21cyclictest0-21swapper/211:56:052
3243099210,21cyclictest0-21swapper/211:51:122
3242599210,2cyclictest0-21swapper/109:40:151
3242099211,8cyclictest0-21swapper/011:55:130
3242099210,4cyclictest0-21swapper/009:25:550
271532210,0sleep30-21swapper/309:10:213
3243099200,20cyclictest0-21swapper/211:21:212
3242599201,13cyclictest1957-21munin-run11:50:001
3242599200,2cyclictest0-21swapper/109:58:001
3242099196,6cyclictest25213-21diskmemload10:50:000
32420991919,0cyclictest0-21swapper/009:37:520
32434991817,1cyclictest6083-21kworker/3:110:28:133
3243099180,18cyclictest0-21swapper/211:31:382
3243099180,18cyclictest0-21swapper/210:39:442
3242599180,10cyclictest13524-21aten2_r7power_c10:20:121
3242099181,17cyclictest0-21swapper/011:11:450
3242099180,18cyclictest0-21swapper/012:19:590
32434991716,1cyclictest0-21swapper/311:45:463
3243499171,15cyclictest0-21swapper/307:10:123
3243499170,17cyclictest0-21swapper/309:25:203
3243499170,16cyclictest0-21swapper/312:27:333
3243499170,15cyclictest0-21swapper/311:15:373
32430991714,2cyclictest31520-21apache_volume10:50:122
3243099170,17cyclictest0-21swapper/210:31:572
3243099170,15cyclictest0-21swapper/210:00:222
3242599173,3cyclictest141rcu_preempt10:26:371
32425991716,1cyclictest25432-21kworker/1:212:30:331
32425991716,1cyclictest0-21swapper/112:05:171
32425991716,1cyclictest0-21swapper/111:27:391
32425991715,2cyclictest4306-21kworker/1:010:44:331
3242599170,17cyclictest0-21swapper/112:23:201
32420991717,0cyclictest0-21swapper/010:44:270
32420991716,1cyclictest13-21ksoftirqd/010:51:550
3242099170,2cyclictest0-21swapper/010:35:430
86212160,0chrt0-21swapper/309:57:263
32434991615,1cyclictest0-21swapper/308:31:233
3243099166,9cyclictest0-21swapper/208:35:282
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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