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2026-06-29 - 04:01

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 Mon Jun 29, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1496229368,9sleep30-21swapper/319:06:373
1508528976,9sleep00-21swapper/019:08:110
1502328766,6sleep20-21swapper/219:07:242
1511828264,14sleep10-21swapper/119:08:361
1536999280,0cyclictest0-21swapper/121:24:091
15376992524,1cyclictest0-21swapper/323:35:103
15376992423,1cyclictest0-21swapper/322:20:513
1537699240,0cyclictest0-21swapper/300:18:103
1537699240,0cyclictest0-21swapper/300:18:103
1536999230,1cyclictest0-21swapper/123:36:411
1536999230,1cyclictest0-21swapper/123:08:231
15376992220,2cyclictest0-21swapper/300:30:163
1537699220,0cyclictest0-21swapper/321:55:063
1536999220,22cyclictest0-21swapper/123:25:471
1537699203,1cyclictest0-21swapper/322:06:323
1537499200,18cyclictest0-21swapper/223:42:192
1537499200,18cyclictest0-21swapper/200:33:252
15369992017,2cyclictest4551-21diskstats22:05:171
1537699192,14cyclictest949-21python23:00:263
15376991918,1cyclictest0-21swapper/321:15:053
15376991917,1cyclictest25591-21turbostat.cron23:35:003
15376991910,3cyclictest8148-21diskmemload00:11:203
1537499190,2cyclictest0-21swapper/222:05:172
148982190,0sleep00-21swapper/023:47:190
1537699189,9cyclictest0-21swapper/321:28:383
1537699187,10cyclictest0-21swapper/323:11:453
15376991817,1cyclictest0-21swapper/300:24:553
15376991810,7cyclictest0-21swapper/322:44:473
1537699180,3cyclictest0-21swapper/323:44:203
1537699180,2cyclictest0-21swapper/323:59:223
1536999189,4cyclictest0-21swapper/100:16:411
1536999189,4cyclictest0-21swapper/100:16:411
1536999180,17cyclictest0-21swapper/123:21:341
1536599185,9cyclictest0-21swapper/019:20:140
1537699179,8cyclictest0-21swapper/321:47:433
1537699172,14cyclictest0-21swapper/321:53:353
15376991715,2cyclictest0-21swapper/323:49:353
15376991715,2cyclictest0-21swapper/300:27:343
15376991712,3cyclictest0-21swapper/323:18:323
1537699170,1cyclictest0-21swapper/321:35:363
1537499173,12cyclictest19947-21/usr/sbin/munin23:50:192
1537499170,1cyclictest0-21swapper/223:45:132
15369991712,4cyclictest30889-21ls00:35:191
1536999170,1cyclictest0-21swapper/121:45:311
1536999170,16cyclictest0-21swapper/123:51:571
1537699168,7cyclictest0-21swapper/323:27:423
15376991614,1cyclictest8148-21diskmemload22:01:483
15376991613,1cyclictest8148-21diskmemload22:33:573
15374991615,1cyclictest0-21swapper/223:38:152
1536999160,1cyclictest0-21swapper/100:22:091
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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