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2024-04-20 - 00:31

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #8

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 rackcslot8s.osadl.org (updated Fri Apr 19, 2024 12:46:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
230312990,1sleep123032-21cpuspeed_turbos07:30:111
125391700,5ptp4l0-21swapper/407:05:184
125391690,36ptp4l0-21swapper/107:07:061
125391620,31ptp4l0-21swapper/007:09:170
34762600,0sleep60-21swapper/610:42:166
34762600,0sleep60-21swapper/610:42:156
1389915836,7phc2sys0-21swapper/507:06:155
1236225848,6sleep70-21swapper/707:08:147
1243925734,7sleep20-21swapper/207:09:142
48522550,0sleep60-21swapper/609:55:216
1238525332,7sleep30-21swapper/307:08:343
1238825241,6sleep60-21swapper/607:08:376
125391380,0ptp4l0-21swapper/010:40:170
125391380,0ptp4l0-21swapper/010:40:170
125391310,0ptp4l0-21swapper/012:20:140
125391300,0ptp4l0-21swapper/611:18:516
125391290,0ptp4l0-21swapper/512:09:575
125391290,0ptp4l0-21swapper/510:55:165
125391290,0ptp4l0-21swapper/510:03:045
125391290,0ptp4l0-21swapper/507:10:145
125391290,0ptp4l0-21swapper/011:39:530
125391280,1ptp4l14479-21fw_conntrack10:10:134
125391280,0ptp4l0-21swapper/410:27:194
125391280,0ptp4l0-21swapper/410:24:054
125391280,0ptp4l0-21swapper/009:59:430
125391270,0ptp4l0-21swapper/611:25:076
125391270,0ptp4l0-21swapper/510:46:525
125391270,0ptp4l0-21swapper/510:43:225
125391270,0ptp4l0-21swapper/510:43:225
125391270,0ptp4l0-21swapper/509:33:165
125391270,0ptp4l0-21swapper/411:28:514
125391270,0ptp4l0-21swapper/110:36:281
125391270,0ptp4l0-21swapper/110:36:271
125391270,0ptp4l0-21swapper/010:26:520
125391270,0ptp4l0-21swapper/009:38:150
125391260,3ptp4l101ktimersoftd/009:15:120
125391260,0ptp4l0-21swapper/611:58:306
125391260,0ptp4l0-21swapper/611:33:406
125391260,0ptp4l0-21swapper/511:20:195
125391260,0ptp4l0-21swapper/510:09:055
125391260,0ptp4l0-21swapper/509:17:575
125391260,0ptp4l0-21swapper/409:44:174
125391260,0ptp4l0-21swapper/110:32:051
125391260,0ptp4l0-21swapper/012:04:370
125391260,0ptp4l0-21swapper/010:20:410
125391260,0ptp4l0-21swapper/008:33:510
125391260,0ptp4l0-21swapper/008:20:120
125391260,0ptp4l0-21swapper/007:25:010
125391250,3ptp4l241ktimersoftd/110:17:361
125391250,1ptp4l22336-21grep11:10:091
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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