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2025-12-26 - 01:52

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 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 100 highest latencies:
System rackcslot8s.osadl.org (updated Thu Dec 25, 2025 12:46:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1881916050,6phc2sys0-21swapper/407:09:084
111391590,5ptp4l0-21swapper/007:06:510
123942580,0sleep60-21swapper/608:45:126
239732570,0sleep50-21swapper/510:20:185
111391570,5ptp4l0-21swapper/107:09:251
3207125433,6sleep60-21swapper/607:08:226
3029425444,6sleep70-21swapper/707:05:017
3194125342,7sleep20-21swapper/207:06:412
3184225030,6sleep50-21swapper/507:05:245
3187824635,7sleep30-21swapper/307:05:533
111391350,0ptp4l0-21swapper/410:30:164
111391320,1ptp4l21189-21cpuspeed_turbos10:15:110
111391320,0ptp4l0-21swapper/708:10:137
111391320,0ptp4l0-21swapper/409:50:184
111391300,0ptp4l0-21swapper/611:55:156
111391270,3ptp4l0-21swapper/111:55:151
111391270,0ptp4l0-21swapper/011:25:180
111391260,0ptp4l0-21swapper/612:36:226
111391260,0ptp4l0-21swapper/408:50:004
111391250,1ptp4l4270-21users09:35:204
111391250,1ptp4l13554-21latency_hist12:20:000
111391250,0ptp4l641ktimersoftd/607:42:216
111391250,0ptp4l0-21swapper/411:05:164
111391250,0ptp4l0-21swapper/410:25:174
111391250,0ptp4l0-21swapper/410:05:204
111391250,0ptp4l0-21swapper/410:00:004
111391250,0ptp4l0-21swapper/212:25:162
111391250,0ptp4l0-21swapper/008:50:110
111391240,1ptp4l5087-21hddtemp_smartct10:50:120
111391240,1ptp4l29479-21ps08:10:170
111391240,1ptp4l11656-21sed09:55:000
111391240,0ptp4l0-21swapper/710:40:157
111391240,0ptp4l0-21swapper/511:45:125
111391240,0ptp4l0-21swapper/411:55:134
111391240,0ptp4l0-21swapper/410:55:134
111391240,0ptp4l0-21swapper/410:35:184
111391240,0ptp4l0-21swapper/409:40:114
111391240,0ptp4l0-21swapper/409:25:174
111391240,0ptp4l0-21swapper/408:35:154
111391240,0ptp4l0-21swapper/408:28:564
111391240,0ptp4l0-21swapper/407:45:204
111391240,0ptp4l0-21swapper/407:15:184
111391240,0ptp4l0-21swapper/011:15:120
111391240,0ptp4l0-21swapper/010:45:160
111391240,0ptp4l0-21swapper/010:30:210
111391240,0ptp4l0-21swapper/008:40:110
111391240,0ptp4l0-21swapper/007:35:120
111391230,0ptp4l0-21swapper/708:15:127
111391230,0ptp4l0-21swapper/707:25:137
111391230,0ptp4l0-21swapper/412:25:144
111391230,0ptp4l0-21swapper/412:20:134
111391230,0ptp4l0-21swapper/412:05:134
111391230,0ptp4l0-21swapper/411:35:194
111391230,0ptp4l0-21swapper/411:17:094
111391230,0ptp4l0-21swapper/411:00:174
111391230,0ptp4l0-21swapper/411:00:164
111391230,0ptp4l0-21swapper/410:50:164
111391230,0ptp4l0-21swapper/410:15:154
111391230,0ptp4l0-21swapper/409:30:184
111391230,0ptp4l0-21swapper/409:25:004
111391230,0ptp4l0-21swapper/409:15:124
111391230,0ptp4l0-21swapper/409:10:114
111391230,0ptp4l0-21swapper/409:05:144
111391230,0ptp4l0-21swapper/408:55:194
111391230,0ptp4l0-21swapper/408:50:164
111391230,0ptp4l0-21swapper/408:30:114
111391230,0ptp4l0-21swapper/408:13:334
111391230,0ptp4l0-21swapper/408:04:274
111391230,0ptp4l0-21swapper/407:35:154
111391230,0ptp4l0-21swapper/407:30:174
111391230,0ptp4l0-21swapper/407:20:144
111391230,0ptp4l0-21swapper/210:00:152
111391230,0ptp4l0-21swapper/012:20:160
111391230,0ptp4l0-21swapper/012:05:120
111391230,0ptp4l0-21swapper/011:40:090
111391230,0ptp4l0-21swapper/011:30:120
111391230,0ptp4l0-21swapper/011:20:130
111391230,0ptp4l0-21swapper/011:10:170
111391230,0ptp4l0-21swapper/010:12:110
111391230,0ptp4l0-21swapper/009:40:190
111391230,0ptp4l0-21swapper/009:26:580
111391230,0ptp4l0-21swapper/008:55:200
111391230,0ptp4l0-21swapper/008:35:130
111391230,0ptp4l0-21swapper/008:25:100
111391230,0ptp4l0-21swapper/008:20:150
111391230,0ptp4l0-21swapper/008:20:140
111391230,0ptp4l0-21swapper/008:00:010
111391230,0ptp4l0-21swapper/007:40:100
111391230,0ptp4l0-21swapper/007:10:180
111391220,0ptp4l20174-21strings07:50:164
111391220,0ptp4l0-21swapper/709:20:187
111391220,0ptp4l0-21swapper/709:00:127
111391220,0ptp4l0-21swapper/612:25:176
111391220,0ptp4l0-21swapper/612:10:116
111391220,0ptp4l0-21swapper/610:00:186
111391220,0ptp4l0-21swapper/607:30:156
111391220,0ptp4l0-21swapper/512:15:125
111391220,0ptp4l0-21swapper/412:30:194
111391220,0ptp4l0-21swapper/412:15:184
111391220,0ptp4l0-21swapper/412:00:164
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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