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2025-12-15 - 17:50

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 rack0slot4s.osadl.org (updated Mon Dec 15, 2025 00:46:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
41332792374336,31sleep60-21swapper/619:08:3412
41332602370362,5sleep130-21swapper/1319:08:255
41329102367359,5sleep100-21swapper/1019:05:252
41330402363343,13sleep150-21swapper/1519:05:467
41331442358337,14sleep110-21swapper/1119:07:033
41330462358339,12sleep40-21swapper/419:05:5110
41332122356335,14sleep50-21swapper/519:07:4511
41331892356336,13sleep70-21swapper/719:07:3113
41331712355334,14sleep140-21swapper/1419:07:226
41332382354334,13sleep90-21swapper/919:08:0515
41331772353332,14sleep20-21swapper/219:07:268
41330542352332,13sleep120-21swapper/1219:05:594
41331552351330,14sleep30-21swapper/319:07:119
41331402350330,13sleep80-21swapper/819:07:0014
41331512348329,12sleep00-21swapper/019:07:080
41331312344324,13sleep10-21swapper/119:06:531
413370199374,32cyclictest4183101-21memory20:05:209
413370199374,32cyclictest4183101-21memory20:05:209
4133701993734,3cyclictest0-21swapper/323:40:199
413371899360,29cyclictest1051ktimers/919:38:0815
4133701993635,1cyclictest98429-21uname22:15:249
4133718993535,0cyclictest0-21swapper/923:18:5015
4133718993535,0cyclictest0-21swapper/923:18:5015
4133718993535,0cyclictest0-21swapper/922:05:4815
4133718993535,0cyclictest0-21swapper/921:59:1615
4133701993532,3cyclictest0-21swapper/322:25:169
4133718993434,0cyclictest0-21swapper/923:50:3215
4133718993434,0cyclictest0-21swapper/900:01:3915
4133727993325,7cyclictest0-21swapper/1220:54:564
4133718993333,0cyclictest0-21swapper/922:19:1415
4133710993311,0cyclictest0-21swapper/620:59:5912
4133701993333,0cyclictest0-21swapper/319:45:229
4133701993331,2cyclictest0-21swapper/321:05:209
4133701993331,1cyclictest0-21swapper/321:30:289
413370699320,29cyclictest0-21swapper/522:15:1711
4133701993230,2cyclictest2248-21/usr/sbin/httpd21:25:149
4133701993230,2cyclictest0-21swapper/320:50:209
4133701993230,0cyclictest0-21swapper/322:35:169
413370199320,29cyclictest0-21swapper/321:54:049
4133739993130,1cyclictest1931-21snmpd23:25:517
413373999310,30cyclictest0-21swapper/1522:15:437
413373999310,30cyclictest0-21swapper/1521:40:157
4133727993131,0cyclictest0-21swapper/1220:20:264
413372799310,30cyclictest0-21swapper/1200:30:164
413372499310,30cyclictest0-21swapper/1120:47:233
413372499310,30cyclictest0-21swapper/1120:05:363
413372499310,30cyclictest0-21swapper/1120:05:363
413372299310,30cyclictest0-21swapper/1000:10:172
413371899310,30cyclictest0-21swapper/923:10:1615
413371899310,30cyclictest0-21swapper/923:10:1615
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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