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2025-08-30 - 00:46

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 50 highest latencies:
System rack8slot4s.osadl.org (updated Fri Aug 29, 2025 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30196212247180,21sleep30-21swapper/307:07:293
30197712242182,18sleep40-21swapper/407:09:394
30196662240174,22sleep10-21swapper/107:08:071
30193762234167,22sleep50-21swapper/507:05:305
30196922230191,26sleep00-21swapper/007:08:300
30195422224168,18sleep70-21swapper/707:06:207
30196582216161,17sleep20-21swapper/207:08:002
30195322210179,20sleep60-21swapper/607:06:116
3020046992928,1cyclictest3072385-21apt08:40:007
302004699264,4cyclictest0-21swapper/707:35:207
3020022992622,3cyclictest3106958-21turbostat.cron09:40:000
302002299260,25cyclictest3124541-21apt-get10:10:100
302004699253,4cyclictest0-21swapper/708:19:177
3020042992521,3cyclictest3049518-21sendmail08:00:016
302004299250,24cyclictest0-21swapper/608:30:136
3020040992523,1cyclictest3135984-21apt-get10:30:135
302003599250,24cyclictest0-21swapper/311:15:133
302004699240,3cyclictest3046657-21idleruntime-cro07:55:017
302004699240,23cyclictest3138411-21apt-get10:35:067
302004299240,23cyclictest0-21swapper/608:20:136
3020040992422,1cyclictest3095255-21apt-get09:20:015
3020035992423,1cyclictest0-21swapper/312:35:133
302003599240,23cyclictest3141533-21turbostat10:40:013
302003599240,23cyclictest3052393-21awk08:05:013
302002799240,23cyclictest0-21swapper/112:35:001
3020022992421,2cyclictest3041367-21apt-get07:45:130
302004699230,22cyclictest3144832-21apt-get10:45:147
302004299230,22cyclictest3139104-21apt-get10:35:136
302004099230,22cyclictest0-21swapper/507:20:115
302004099230,21cyclictest0-21swapper/509:30:175
302003799231,21cyclictest581rcuc/409:20:014
302003799230,22cyclictest0-21swapper/410:15:154
3020035992321,1cyclictest3035622-21http07:35:163
302003599230,2cyclictest3095272-21perf09:20:013
302003599230,1cyclictest3058101-21turbostat08:15:013
3020030992321,1cyclictest3170566-21apt-get11:30:172
302003099230,22cyclictest0-21swapper/211:15:132
302003099230,22cyclictest0-21swapper/207:45:132
302003099230,22cyclictest0-21swapper/207:15:132
3020027992321,1cyclictest3087121-21apt-get09:05:121
3020027992321,1cyclictest3024176-21apt-get07:15:131
302002799230,22cyclictest3152987-21idleruntime-cro10:59:591
302002799230,22cyclictest3021584-21ntp_kernel_pll_07:10:181
302002799230,22cyclictest0-21swapper/107:20:121
302002299230,22cyclictest0-21swapper/010:05:160
302002299230,22cyclictest0-21swapper/008:45:130
3020046992220,1cyclictest3121699-21apt-get10:05:167
302004699220,21cyclictest3202282-21apt-get12:25:147
302004699220,21cyclictest0-21swapper/711:40:137
302004699220,21cyclictest0-21swapper/708:00:127
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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