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2026-04-16 - 23:31

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 Thu Apr 16, 2026 00:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6782912403383,13sleep60-21swapper/619:09:4112
6782262380360,13sleep50-21swapper/519:08:5111
6783102376369,5sleep40-21swapper/419:09:5510
6780172376355,14sleep110-21swapper/1119:06:163
6782782367346,14sleep100-21swapper/1019:09:282
6780052366329,14sleep20-21swapper/219:06:078
6780812365357,5sleep150-21swapper/1519:07:107
6782402359339,13sleep00-21swapper/019:09:030
6781982352332,13sleep130-21swapper/1319:08:275
6748232352333,12sleep90-21swapper/919:05:1015
6782692351332,12sleep70-21swapper/719:09:2613
6782492351331,13sleep80-21swapper/819:09:1114
6782032351331,13sleep10-21swapper/119:08:321
6780002351331,13sleep140-21swapper/1419:06:046
6748292346324,14sleep120-21swapper/1219:05:134
6782442342322,13sleep30-21swapper/319:09:059
678760994544,1cyclictest1769-21arpwatch21:48:4214
67874199400,29cyclictest0-21swapper/223:40:128
678760993838,0cyclictest0-21swapper/822:27:0114
67877899349,25cyclictest0-21swapper/1422:18:216
67877699330,30cyclictest0-21swapper/1320:47:045
67876099337,26cyclictest0-21swapper/822:48:1114
678760993333,0cyclictest0-21swapper/822:33:2314
67877899328,11cyclictest0-21swapper/1419:33:366
67877899328,11cyclictest0-21swapper/1419:11:376
67875199320,29cyclictest0-21swapper/523:55:1511
67873699320,32cyclictest0-21swapper/020:00:140
67877899318,10cyclictest0-21swapper/1422:40:196
67877899310,28cyclictest0-21swapper/1420:25:156
678776993130,1cyclictest1774-21snmpd20:17:455
67877699310,30cyclictest0-21swapper/1300:11:255
67877199310,30cyclictest0-21swapper/1223:25:134
67877199310,30cyclictest0-21swapper/1222:20:014
67877199310,30cyclictest0-21swapper/1221:12:284
678766993130,1cyclictest941302-21kworker/10:1+events23:37:342
678766993130,1cyclictest922047-21kworker/10:1+events23:00:222
678766993130,1cyclictest1774-21snmpd21:19:382
67876399310,30cyclictest0-21swapper/921:03:1015
67876399310,30cyclictest0-21swapper/919:40:2115
67876399310,30cyclictest0-21swapper/900:35:1415
67876099315,26cyclictest0-21swapper/820:45:5514
678760993131,0cyclictest0-21swapper/820:41:1814
678755993130,1cyclictest1000955-21kworker/u32:4+flush-259:000:05:1512
67875199310,30cyclictest0-21swapper/519:25:0511
67874999310,30cyclictest0-21swapper/420:51:4910
67874999310,30cyclictest0-21swapper/420:23:5710
67874999310,30cyclictest0-21swapper/419:20:5610
678745993130,1cyclictest1774-21snmpd00:24:549
67874199310,30cyclictest0-21swapper/222:46:528
67874199310,30cyclictest0-21swapper/222:08:288
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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