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2025-07-19 - 06:22

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #4

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 20 highest latencies:
System rack8slot4s.osadl.org (updated Sat Jul 19, 2025 00:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40931442236176,20sleep70-21swapper/719:09:167
40907482219181,24sleep40-21swapper/419:05:044
40928842218162,18sleep10-21swapper/119:05:321
40930102216187,19sleep30-21swapper/319:07:203
40930542210176,21sleep00-21swapper/019:07:560
40930502210180,19sleep50-21swapper/519:07:545
40930512207172,22sleep60-21swapper/619:07:556
40931852204173,19sleep20-21swapper/219:09:522
4093435992725,1cyclictest0-21swapper/021:29:110
4093453992624,1cyclictest862-21mta-sts-daemon22:30:006
409345399260,25cyclictest0-21swapper/623:30:006
409345399250,22cyclictest4180960-21apt-get21:40:116
409345399250,22cyclictest4120161-21apt-get19:55:116
409344499250,1cyclictest4191957-21perf22:00:013
409345599240,22cyclictest0-21swapper/720:00:007
409345399240,23cyclictest0-21swapper/622:15:126
409344999240,23cyclictest58008-21grep23:45:005
409344999240,23cyclictest0-21swapper/500:20:135
409344499240,23cyclictest4180788-21cat21:40:013
409344499240,23cyclictest4123298-21apt-get20:00:133
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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