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2025-07-01 - 17:46

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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 50 highest latencies:
System rack0slot8s.osadl.org (updated Tue Jul 01, 2025 12:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
94980890,83rtkit-daemon0-21swapper/1007:06:162
275991880,78ptp4l0-21swapper/107:05:311
911126958,9sleep40-21swapper/407:07:326
926226748,9sleep00-21swapper/007:09:400
897826756,9sleep50-21swapper/507:05:327
599626455,7sleep60-21swapper/607:05:098
898426352,9sleep110-21swapper/1107:05:383
78482620,0sleep110-21swapper/1107:45:173
732426249,10sleep70-21swapper/707:05:229
88952610,1sleep30-21swapper/307:05:305
216902590,0sleep70-21swapper/710:10:189
216902590,0sleep70-21swapper/710:10:189
170522580,0sleep60-21swapper/610:05:168
170522580,0sleep60-21swapper/610:05:168
10432570,0sleep80-21swapper/810:25:2110
283342560,0sleep100-21swapper/1011:00:262
148222560,0sleep100-21swapper/1009:20:152
964899214,13cyclictest0-21swapper/410:30:006
967599180,17cyclictest0-21swapper/1009:15:292
90092181,8sleep80-21swapper/807:05:5910
301532180,0sleep40-21swapper/410:20:286
296482180,0sleep70-21swapper/711:45:169
965799173,8cyclictest0-21swapper/607:50:008
275991170,1ptp4l21-21ksoftirqd/110:55:161
275991170,0ptp4l0-21swapper/112:10:151
9675991614,1cyclictest683-21systemd-journal12:00:002
965799162,8cyclictest0-21swapper/610:30:008
963099163,7cyclictest0-21swapper/010:25:000
275991160,0ptp4l0-21swapper/111:00:311
275991160,0ptp4l0-21swapper/107:44:301
191591160,0getstats0-21swapper/209:05:274
966199155,6cyclictest0-21swapper/709:00:009
965299154,8cyclictest6833-21kworker/u24:107:45:017
964899150,3cyclictest0-21swapper/410:05:216
964899150,3cyclictest0-21swapper/410:05:206
963099153,7cyclictest0-21swapper/011:05:000
963099153,7cyclictest0-21swapper/009:40:000
275991150,0ptp4l0-21swapper/107:55:291
240442150,0sleep50-21swapper/509:30:247
967599143,7cyclictest0-21swapper/1007:15:012
965799143,7cyclictest0-21swapper/608:15:008
965299143,7cyclictest0-21swapper/509:15:007
965299140,2cyclictest0-21swapper/512:30:187
964899140,2cyclictest0-21swapper/407:30:176
963099142,8cyclictest0-21swapper/008:15:000
963099142,7cyclictest0-21swapper/008:20:000
275991140,0ptp4l0-21swapper/108:30:201
275991140,0ptp4l0-21swapper/108:09:241
275991140,0ptp4l0-21swapper/107:50:201
967999130,8cyclictest0-21swapper/1109:40:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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