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2026-07-24 - 17:38

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #3

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 rack0slot3s.osadl.org (updated Fri Jul 24, 2026 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15119462260218,33sleep10-21swapper/118:43:101
15118292260211,18sleep70-21swapper/718:41:337
15120592257217,16sleep30-21swapper/318:44:393
15118042255232,15sleep60-21swapper/618:41:146
15117922253227,17sleep50-21swapper/518:41:055
15119922242217,16sleep40-21swapper/418:43:484
15117292242217,17sleep00-21swapper/018:40:250
15119382241218,15sleep20-21swapper/218:43:022
1512390993433,1cyclictest1390-21snmpd20:53:344
1512372993433,1cyclictest0-21swapper/019:40:430
1512403993028,1cyclictest0-21swapper/622:15:036
1512390993016,14cyclictest0-21swapper/421:43:044
1512372993028,1cyclictest1390-21snmpd20:09:500
1512407992928,1cyclictest0-21swapper/720:13:137
1512407992928,1cyclictest0-21swapper/700:07:467
1512407992928,1cyclictest0-21swapper/700:07:457
1512376992928,1cyclictest0-21swapper/122:15:031
1512407992827,1cyclictest0-21swapper/719:08:577
1512407992721,5cyclictest1390-21snmpd23:04:047
1512407992721,5cyclictest1390-21snmpd22:37:137
151238199270,1cyclictest0-21swapper/220:31:282
151240799260,22cyclictest0-21swapper/722:48:407
151240799260,22cyclictest0-21swapper/721:01:227
1512403992622,3cyclictest1390-21snmpd23:29:056
1512403992622,3cyclictest1390-21snmpd22:44:016
151240399260,24cyclictest0-21swapper/619:39:126
151238599260,22cyclictest0-21swapper/323:41:133
151238599260,22cyclictest0-21swapper/319:02:213
151238199260,24cyclictest0-21swapper/222:36:262
1512376992625,1cyclictest0-21swapper/120:41:111
1512372992621,4cyclictest1390-21snmpd00:21:050
1512403992525,0cyclictest0-21swapper/620:41:116
1512403992522,2cyclictest1390-21snmpd18:53:266
1512403992522,2cyclictest1390-21snmpd18:53:256
1512398992524,1cyclictest1660739-21ntpq23:30:105
1512398992521,3cyclictest1390-21snmpd22:26:575
1512390992521,3cyclictest1687960-21cat00:23:524
1512390992521,3cyclictest1390-21snmpd23:33:574
1512390992512,11cyclictest0-21swapper/419:39:184
1512385992521,3cyclictest1390-21snmpd19:10:153
1512385992518,5cyclictest0-21swapper/319:33:463
1512381992521,3cyclictest1390-21snmpd22:50:072
1512381992521,3cyclictest1390-21snmpd20:08:232
1512372992520,4cyclictest1390-21snmpd21:21:330
151237299250,24cyclictest0-21swapper/019:55:180
1512407992417,3cyclictest0-21swapper/720:00:097
1512407992412,4cyclictest0-21swapper/720:32:557
151240799240,24cyclictest0-21swapper/718:48:167
151240799240,24cyclictest0-21swapper/718:48:157
1512403992417,3cyclictest0-21swapper/621:43:006
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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