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2026-08-12 - 10:12

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 100 highest latencies:
System rack8slot4s.osadl.org (updated Tue Aug 11, 2026 00:44:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
41274172236169,20sleep60-21swapper/619:09:186
41272262230193,24sleep40-21swapper/419:06:344
41274482226164,19sleep10-21swapper/119:09:451
41273422219177,25sleep50-21swapper/519:08:125
41274182218186,21sleep70-21swapper/719:09:197
41272452217183,22sleep30-21swapper/319:06:493
41272042213172,26sleep00-21swapper/019:06:140
41272562212183,19sleep20-21swapper/219:06:562
412770799315,25cyclictest11120-21idleruntime-cro21:20:002
412770799290,28cyclictest0-21swapper/220:50:132
412770799290,28cyclictest0-21swapper/219:20:142
412771199271,24cyclictest789-21dbus-daemon23:50:003
412770799270,26cyclictest0-21swapper/223:15:152
412770799270,26cyclictest0-21swapper/223:00:122
4127705992719,8cyclictest4178531-21ls20:35:001
412771799260,25cyclictest64290-21idleruntime-cro22:50:006
412771399260,25cyclictest121101-21awk00:25:004
4127707992622,4cyclictest0-21swapper/200:20:002
412770799260,25cyclictest0-21swapper/223:55:112
412770799260,25cyclictest0-21swapper/222:50:142
412770799260,25cyclictest0-21swapper/220:35:192
412770799260,25cyclictest0-21swapper/219:10:182
412770799260,25cyclictest0-21swapper/200:05:172
412770599260,20cyclictest0-21swapper/122:20:201
412770599260,1cyclictest4149447-21apt-get19:45:121
412770599260,0cyclictest0-21swapper/121:10:121
412771799250,24cyclictest4175586-21ls20:30:006
4127711992520,4cyclictest129922-21idleruntime-cro00:40:003
4127705992522,3cyclictest0-21swapper/121:00:121
4127705992522,3cyclictest0-21swapper/120:10:121
412770599250,25cyclictest93775-21mkdir23:40:001
412770599250,24cyclictest0-21swapper/122:40:131
412770299250,24cyclictest4169655-21perf20:20:000
412771999240,23cyclictest0-21swapper/723:40:187
412771999240,23cyclictest0-21swapper/720:20:187
412771999240,23cyclictest0-21swapper/719:10:487
412771999240,23cyclictest0-21swapper/700:25:117
412771999240,1cyclictest5662-21apt-get21:10:127
412771999240,0cyclictest0-21swapper/723:15:157
412771799240,23cyclictest4171450-21ntpq20:20:196
412771799240,1cyclictest2276-21cron21:05:006
412771399240,24cyclictest0-21swapper/423:20:144
412771399240,23cyclictest71952-21ntpq23:00:184
4127711992423,1cyclictest0-21swapper/319:30:133
4127711992422,2cyclictest11132-21munin-run21:20:003
412771199240,3cyclictest64265-21turbostat22:50:003
4127707992420,3cyclictest0-21swapper/220:15:142
4127707992419,5cyclictest0-21swapper/219:45:122
412770799240,3cyclictest0-21swapper/222:30:122
412770799240,3cyclictest0-21swapper/222:05:122
412770799240,23cyclictest0-21swapper/223:45:142
412770799240,23cyclictest0-21swapper/221:55:162
412770799240,23cyclictest0-21swapper/219:35:102
412770599240,23cyclictest80704-21ntp_kernel_err23:15:201
412770599240,23cyclictest0-21swapper/123:20:131
412770599240,1cyclictest4128039-21apt-get19:10:121
412770599240,0cyclictest0-21swapper/122:35:101
412770299240,1cyclictest4160799-21apt20:05:000
4127719992322,1cyclictest39453-21ntpq22:05:187
4127719992322,1cyclictest0-21swapper/721:20:007
4127719992322,1cyclictest0-21swapper/719:30:137
4127719992321,1cyclictest0-21swapper/721:34:597
412771999230,22cyclictest4187377-21perf20:50:007
412771999230,22cyclictest29243-21apt-get21:50:137
412771999230,22cyclictest118588-21apt-get00:20:157
412771999230,22cyclictest0-21swapper/720:15:147
4127717992323,0cyclictest0-21swapper/621:55:116
4127717992319,3cyclictest103043-21apt-get23:55:106
412771799230,22cyclictest0-21swapper/623:50:036
412771799230,22cyclictest0-21swapper/621:15:156
412771799230,22cyclictest0-21swapper/620:05:206
412771799230,22cyclictest0-21swapper/600:30:126
412771799230,1cyclictest92513-21ntpq23:35:176
412771699230,22cyclictest0-21swapper/520:25:095
412771699230,1cyclictest95458-21ntpq23:40:185
4127713992323,0cyclictest0-21swapper/423:35:114
4127713992322,1cyclictest0-21swapper/422:35:164
412771399230,22cyclictest0-21swapper/400:25:114
4127711992322,1cyclictest0-21swapper/322:55:133
4127711992322,1cyclictest0-21swapper/320:25:033
4127711992321,1cyclictest0-21swapper/319:45:123
412771199230,23cyclictest0-21swapper/323:40:183
412771199230,23cyclictest0-21swapper/322:05:123
412771199230,22cyclictest0-21swapper/322:40:133
412771199230,22cyclictest0-21swapper/319:10:033
412771199230,22cyclictest0-21swapper/300:25:113
412771199230,1cyclictest0-21swapper/321:10:123
412771199230,0cyclictest0-21swapper/320:20:183
4127707992320,3cyclictest0-21swapper/222:10:122
412770799230,22cyclictest0-21swapper/223:50:122
412770799230,22cyclictest0-21swapper/223:40:132
412770799230,22cyclictest0-21swapper/223:25:012
412770799230,22cyclictest0-21swapper/222:00:132
412770799230,22cyclictest0-21swapper/219:30:142
4127705992322,1cyclictest0-21swapper/120:50:121
4127705992321,2cyclictest0-21swapper/100:25:111
4127705992320,2cyclictest115619-21apt-get00:15:131
412770599230,23cyclictest88269-21apt-get23:30:121
412770599230,22cyclictest73537-21apt-get23:05:131
412770599230,22cyclictest61755-21apt-get22:45:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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