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2025-12-21 - 08:15

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 Sun Dec 21, 2025 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31532542234169,51sleep70-21swapper/719:08:177
31533422225188,24sleep20-21swapper/219:09:322
31533372221182,24sleep60-21swapper/619:09:286
31531452218185,21sleep40-21swapper/419:06:464
31533742213180,21sleep50-21swapper/519:09:595
31532452211177,22sleep00-21swapper/019:08:100
31531892211159,41sleep10-21swapper/119:07:221
31532212205174,20sleep30-21swapper/319:07:493
315359899270,1cyclictest3264139-21turbostat22:20:007
3153598992622,2cyclictest3203316-21awk20:35:017
315358799260,25cyclictest3324750-21idleruntime-cro00:04:593
3153598992523,1cyclictest3206868-21apt-get20:40:127
315359899250,1cyclictest0-21swapper/721:35:137
315358799250,24cyclictest0-21swapper/321:50:133
315358399250,24cyclictest0-21swapper/220:45:142
315358399250,24cyclictest0-21swapper/220:45:142
315358399250,24cyclictest0-21swapper/200:40:012
3153598992421,3cyclictest0-21swapper/700:35:127
3153598992419,4cyclictest3319422-21apt-get23:55:137
3153593992422,1cyclictest3258427-21idleruntime-cro22:10:016
315359299240,23cyclictest3198032-21apt-get20:25:165
3153587992422,1cyclictest3273184-21apt-get22:35:133
315358799240,23cyclictest0-21swapper/319:15:013
315358399240,23cyclictest3336196-21perf00:25:002
3153598992321,1cyclictest3264585-21apt-get22:20:137
3153598992320,3cyclictest0-21swapper/722:50:157
3153598992319,3cyclictest3307737-21apt-get23:35:157
315359899230,22cyclictest3304881-21apt-get23:30:127
315359899230,22cyclictest0-21swapper/720:50:137
315359899230,22cyclictest0-21swapper/720:50:127
315359899230,22cyclictest0-21swapper/719:15:027
315359899230,0cyclictest0-21swapper/723:25:137
3153593992321,1cyclictest3221195-21apt-get21:05:126
315359399230,22cyclictest0-21swapper/623:10:126
3153592992321,1cyclictest3322329-21apt-get00:00:135
3153592992321,1cyclictest3287020-21cron22:59:595
315359299230,23cyclictest0-21swapper/523:24:595
315359299230,22cyclictest0-21swapper/523:45:145
315359299230,0cyclictest0-21swapper/523:00:155
3153589992321,1cyclictest3160624-21apt-get19:20:124
315358999230,22cyclictest0-21swapper/421:00:014
3153587992321,1cyclictest0-21swapper/300:35:013
315358799230,22cyclictest0-21swapper/323:04:593
315358799230,1cyclictest0-21swapper/322:55:143
3153583992321,1cyclictest3224043-21apt-get21:10:112
3153583992321,1cyclictest0-21swapper/200:00:122
3153581992321,1cyclictest0-21swapper/123:10:121
315358199230,1cyclictest3276055-21apt-get22:40:121
3153578992321,1cyclictest0-21swapper/022:00:010
3153578992321,1cyclictest0-21swapper/019:30:140
315357899230,22cyclictest3289918-21perf23:05:000
315357899230,22cyclictest0-21swapper/023:34:590
315357899230,22cyclictest0-21swapper/019:50:130
315357899230,21cyclictest3269771-21fwupd22:28:570
315357899230,1cyclictest3324761-21munin-run00:04:590
315357899230,1cyclictest3156814-21latency_hist19:15:000
3153598992220,1cyclictest3235478-21apt-get21:30:137
3153598992219,3cyclictest0-21swapper/700:15:007
3153598992219,2cyclictest0-21swapper/720:55:157
315359899220,21cyclictest3273184-21apt-get22:35:137
315359899220,21cyclictest3226900-21apt-get21:15:147
315359899220,21cyclictest0-21swapper/723:05:137
315359899220,21cyclictest0-21swapper/722:00:127
315359899220,21cyclictest0-21swapper/721:25:157
315359899220,21cyclictest0-21swapper/721:10:107
315359899220,21cyclictest0-21swapper/719:25:157
315359399220,22cyclictest0-21swapper/621:30:136
315359399220,21cyclictest0-21swapper/620:50:126
315359399220,21cyclictest0-21swapper/620:50:116
315359399220,21cyclictest0-21swapper/619:45:136
315359399220,21cyclictest0-21swapper/619:35:146
315359399220,21cyclictest0-21swapper/600:35:116
315359399220,1cyclictest3316570-21apt-get23:50:116
315359399220,1cyclictest3191877-21munin-run20:15:016
315359299220,21cyclictest3278908-21apt-get22:45:135
315359299220,21cyclictest0-21swapper/523:05:145
315359299220,21cyclictest0-21swapper/522:44:595
315359299220,21cyclictest0-21swapper/522:05:165
315359299220,21cyclictest0-21swapper/520:35:145
315359299220,21cyclictest0-21swapper/520:35:135
315359299220,21cyclictest0-21swapper/519:50:155
315359299220,1cyclictest3330884-21apt-get00:15:115
315359299220,1cyclictest3232628-21apt-get21:25:155
315359299220,1cyclictest0-21swapper/521:45:015
3153589992220,1cyclictest0-21swapper/400:35:114
315358999220,21cyclictest0-21swapper/422:30:124
315358999220,21cyclictest0-21swapper/420:35:144
315358999220,21cyclictest0-21swapper/420:35:144
315358999220,21cyclictest0-21swapper/419:50:154
315358999220,1cyclictest3269927-21idleruntime-cro22:30:004
315358999220,1cyclictest3249601-21munin-run21:55:004
3153587992222,0cyclictest0-21swapper/319:35:133
3153587992221,1cyclictest3219597-21ntpq21:00:193
3153587992220,1cyclictest3252453-21munin-run22:00:003
3153587992220,1cyclictest0-21swapper/319:35:013
315358799220,2cyclictest3290340-21apt-get23:05:133
315358799220,22cyclictest0-21swapper/322:28:563
315358799220,21cyclictest3284181-21dump-pmu-power22:54:593
315358799220,21cyclictest3226900-21apt-get21:15:143
315358799220,1cyclictest3258858-21apt-get22:10:133
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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