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2024-07-27 - 03:37

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #5

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 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 rack0slot5s.osadl.org (updated Sat Jul 27, 2024 00:45:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3023232405399,4sleep90-21swapper/919:09:1515
3023112403397,4sleep140-21swapper/1419:09:046
3020692403397,4sleep80-21swapper/819:05:2914
3023762402396,4sleep60-21swapper/619:10:0012
3022532402396,4sleep100-21swapper/1019:08:122
3022722399393,4sleep120-21swapper/1219:08:304
3021862398392,4sleep150-21swapper/1519:07:137
3023382396390,4sleep70-21swapper/719:09:2913
3023352396390,4sleep40-21swapper/419:09:2610
3021812396390,4sleep110-21swapper/1119:07:093
3021732395389,4sleep30-21swapper/319:07:019
3021512395389,4sleep00-21swapper/019:06:420
3020942395389,4sleep130-21swapper/1319:05:505
3023322394388,4sleep10-21swapper/119:09:231
3021372392385,5sleep50-21swapper/519:06:3111
3020632391385,4sleep20-21swapper/219:05:238
4766822380,0sleep120-21swapper/1223:20:134
30267499319,0cyclictest0-21swapper/922:37:1415
30267399300,29cyclictest0-21swapper/820:50:1214
30267999290,26cyclictest0-21swapper/1420:55:146
302673992926,3cyclictest1678-21snmpd22:25:5214
30268099280,27cyclictest0-21swapper/1520:24:207
30267999280,27cyclictest0-21swapper/1422:02:156
30267999280,27cyclictest0-21swapper/1421:32:086
30267899280,27cyclictest0-21swapper/1323:38:575
30267899280,27cyclictest0-21swapper/1323:28:485
30267899280,27cyclictest0-21swapper/1322:53:205
30267899280,27cyclictest0-21swapper/1322:49:415
30267699280,27cyclictest0-21swapper/1119:54:493
30267499280,27cyclictest0-21swapper/921:42:5015
302673992826,2cyclictest1678-21snmpd23:59:4914
302673992826,2cyclictest1678-21snmpd21:11:5814
30267399280,27cyclictest0-21swapper/819:31:1314
302672992827,1cyclictest1678-21snmpd22:30:4613
30267299280,27cyclictest0-21swapper/721:18:5213
30267299280,27cyclictest0-21swapper/720:02:4413
30267099280,27cyclictest0-21swapper/520:38:2711
30266799280,27cyclictest0-21swapper/222:20:498
30266699280,27cyclictest0-21swapper/123:59:521
30266699280,27cyclictest0-21swapper/123:46:301
30266699280,27cyclictest0-21swapper/120:15:531
30266699280,27cyclictest0-21swapper/100:00:101
302665992827,1cyclictest1678-21snmpd22:38:130
302665992827,1cyclictest0-21swapper/023:00:020
30268099270,26cyclictest0-21swapper/1520:25:577
302679992726,1cyclictest1678-21snmpd21:10:466
302679992726,1cyclictest1678-21snmpd20:45:126
30267999270,26cyclictest0-21swapper/1423:43:036
30267999270,26cyclictest0-21swapper/1421:36:176
30267999270,26cyclictest0-21swapper/1419:26:546
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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