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2026-04-10 - 08:50

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 Fri Apr 10, 2026 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2498382224161,49sleep40-21swapper/419:09:454
2498112219162,19sleep50-21swapper/519:09:235
2496382213183,19sleep30-21swapper/319:06:553
2497472209177,20sleep60-21swapper/619:08:286
2495682208175,21sleep70-21swapper/719:05:567
2497692205176,18sleep10-21swapper/119:08:471
2497592205170,22sleep00-21swapper/019:08:380
2497252203176,17sleep20-21swapper/219:08:082
3753072560,0sleep351-21ksoftirqd/322:45:153
250092992925,4cyclictest285288-21dump-pmu-power20:10:005
25009299280,22cyclictest251644-21awk19:10:175
25009299270,22cyclictest345789-21munin-run21:55:005
25009299270,1cyclictest0-21swapper/523:25:015
25009899258,4cyclictest0-21swapper/720:42:297
25009299250,1cyclictest369322-21apt-get22:35:135
25009299250,1cyclictest369322-21apt-get22:35:135
25008799250,25cyclictest264005-21chrt19:30:183
25008799250,1cyclictest0-21swapper/323:20:013
250081992521,1cyclictest271428-21apt-get19:45:121
25008199250,22cyclictest316710-21munin-run21:04:591
25008199250,21cyclictest0-21swapper/123:40:131
25009899240,23cyclictest310979-21turbostat20:55:007
25009599240,23cyclictest262384-21munin-run19:30:006
25009599240,23cyclictest252823-21munin-run19:15:016
25009599240,23cyclictest0-21swapper/622:00:126
25009299240,24cyclictest0-21swapper/522:30:005
25008999240,23cyclictest0-21swapper/423:10:124
25008799242,1cyclictest0-21swapper/323:00:003
25008399240,23cyclictest412557-21perf23:50:002
25008399240,23cyclictest0-21swapper/222:45:152
25008399240,23cyclictest0-21swapper/221:25:112
250081992420,1cyclictest0-21swapper/119:30:131
25008199240,23cyclictest0-21swapper/121:45:131
25008199240,22cyclictest0-21swapper/119:35:121
25007799240,23cyclictest0-21swapper/022:10:120
250098992321,1cyclictest280000-21apt-get20:00:127
25009899230,22cyclictest397734-21apt-get23:25:017
25009899230,22cyclictest0-21swapper/719:20:117
25009899230,1cyclictest0-21swapper/723:25:137
25009899230,1cyclictest0-21swapper/721:40:127
250095992321,1cyclictest291425-21apt-get20:20:116
25009599230,22cyclictest0-21swapper/621:45:006
25009599230,22cyclictest0-21swapper/621:00:006
25009599230,22cyclictest0-21swapper/600:30:016
250092992320,3cyclictest0-21swapper/523:10:115
25009299230,22cyclictest274276-21apt-get19:50:115
25009299230,22cyclictest0-21swapper/520:00:125
25009299230,22cyclictest0-21swapper/500:10:005
25009299230,0cyclictest302852-21apt-get20:40:115
25009299230,0cyclictest0-21swapper/519:45:135
250089992322,1cyclictest0-21swapper/420:30:134
25008999230,2cyclictest409440-21munin-run23:45:004
25008999230,1cyclictest432680-21awk00:25:014
250087992321,1cyclictest409429-21idleruntime-cro23:45:003
25008799230,23cyclictest0-21swapper/321:35:113
25008799230,22cyclictest0-21swapper/323:00:113
25008399230,22cyclictest308140-21perf20:50:002
25008399230,1cyclictest0-21swapper/200:00:012
250081992321,1cyclictest0-21swapper/123:25:121
25008199230,22cyclictest0-21swapper/123:50:121
250077992321,1cyclictest351929-21apt-get22:05:120
25007799230,22cyclictest282420-21idleruntime-cro20:05:000
25007799230,22cyclictest0-21swapper/023:25:130
25007799230,22cyclictest0-21swapper/020:15:120
25007799230,22cyclictest0-21swapper/019:40:120
25007799230,1cyclictest336970-21awk21:39:590
250098992222,0cyclictest0-21swapper/723:10:007
250098992221,1cyclictest0-21swapper/721:10:147
250098992221,1cyclictest0-21swapper/720:05:097
250098992221,0cyclictest0-21swapper/721:45:137
250098992220,1cyclictest435938-21apt-get00:30:117
25009899220,21cyclictest0-21swapper/722:05:127
25009899220,21cyclictest0-21swapper/721:15:137
25009899220,1cyclictest0-21swapper/700:40:007
250095992220,1cyclictest277127-21apt-get19:55:136
25009599220,22cyclictest0-21swapper/622:40:016
25009599220,22cyclictest0-21swapper/622:40:016
25009599220,21cyclictest0-21swapper/623:50:136
25009599220,21cyclictest0-21swapper/623:25:026
25009599220,21cyclictest0-21swapper/621:55:146
25009599220,21cyclictest0-21swapper/621:35:116
25009599220,21cyclictest0-21swapper/619:35:006
25009599220,20cyclictest0-21swapper/621:20:146
25009599220,1cyclictest0-21swapper/622:29:596
250092992222,0cyclictest0-21swapper/523:35:115
250092992221,1cyclictest0-21swapper/520:15:135
250092992220,1cyclictest0-21swapper/523:45:125
25009299220,21cyclictest0-21swapper/523:15:145
25009299220,21cyclictest0-21swapper/520:30:135
25009299220,21cyclictest0-21swapper/519:20:125
25009299220,21cyclictest0-21swapper/519:20:015
25009299220,21cyclictest0-21swapper/500:30:125
250089992221,1cyclictest0-21swapper/400:05:104
250089992220,1cyclictest360766-21apt-get22:20:134
25008999220,21cyclictest0-21swapper/423:55:114
25008999220,21cyclictest0-21swapper/423:45:124
25008999220,21cyclictest0-21swapper/422:20:004
25008999220,21cyclictest0-21swapper/421:25:014
25008999220,21cyclictest0-21swapper/421:05:114
25008999220,0cyclictest0-21swapper/423:35:114
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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