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2026-07-19 - 04:54

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 Jul 19, 2026 00:44:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2782922264190,22sleep00-21swapper/019:06:040
2785352244170,22sleep70-21swapper/719:09:347
2783262229192,24sleep50-21swapper/519:06:345
2784842223183,25sleep30-21swapper/319:08:493
2784782220187,22sleep60-21swapper/619:08:446
2782572218164,44sleep10-21swapper/119:05:331
2783822212180,21sleep40-21swapper/419:07:214
2782852212174,27sleep20-21swapper/219:05:582
27880199280,26cyclictest324131-21apt-get20:25:126
278801992621,4cyclictest0-21swapper/619:10:126
27880199260,25cyclictest396296-21ntp_offset22:25:196
27879899260,25cyclictest0-21swapper/520:55:005
27879199260,25cyclictest362037-21cron21:30:003
27878099260,25cyclictest332555-21sleep20:40:010
27880599250,24cyclictest307713-21ntpq19:55:187
278801992522,3cyclictest0-21swapper/620:55:126
27880199250,24cyclictest455367-21sh00:05:196
27880199250,22cyclictest444712-21munin-run23:50:006
27880199250,1cyclictest427457-21apt-get23:20:146
278795992524,1cyclictest0-21swapper/423:45:134
27879199250,24cyclictest0-21swapper/322:35:123
27878699250,24cyclictest0-21swapper/223:05:132
27878299250,24cyclictest0-21swapper/100:00:111
27878099250,24cyclictest460663-21apt-get00:15:120
27880199240,24cyclictest294593-21apt-get19:35:126
278798992422,1cyclictest0-21swapper/523:55:135
27879899240,23cyclictest0-21swapper/521:25:145
27879899240,23cyclictest0-21swapper/519:15:145
27879599240,23cyclictest0-21swapper/422:50:024
278791992423,1cyclictest0-21swapper/323:05:203
278791992422,1cyclictest0-21swapper/322:50:013
278791992422,1cyclictest0-21swapper/322:50:013
278786992419,4cyclictest308948-21latency_hist20:00:012
27878699240,23cyclictest386106-21apt-get22:10:122
27878699240,23cyclictest0-21swapper/200:00:002
27878299240,3cyclictest434639-21ntpq23:30:191
27878299240,23cyclictest0-21swapper/123:55:121
278780992424,0cyclictest0-21swapper/022:25:130
278780992423,1cyclictest0-21swapper/020:00:010
27878099240,23cyclictest335926-21apt-get20:45:100
27878099240,23cyclictest0-21swapper/000:05:120
278805992323,0cyclictest0-21swapper/719:25:217
278805992322,1cyclictest403843-21apt-get22:40:107
278805992322,1cyclictest394956-21apt-get22:25:137
27880599230,22cyclictest383130-21apt-get22:05:117
278801992321,2cyclictest0-21swapper/622:30:196
278801992321,2cyclictest0-21swapper/600:00:126
27880199230,23cyclictest356183-21idleruntime-cro21:20:006
27880199230,23cyclictest0-21swapper/622:40:176
27880199230,22cyclictest0-21swapper/621:50:136
27880199230,22cyclictest0-21swapper/600:20:216
278798992323,0cyclictest0-21swapper/500:25:195
27879899230,22cyclictest0-21swapper/520:20:015
278795992322,1cyclictest315285-21apt-get20:10:144
27879599230,23cyclictest0-21swapper/421:55:124
27879599230,22cyclictest0-21swapper/423:15:144
27879599230,22cyclictest0-21swapper/422:35:024
27879599230,22cyclictest0-21swapper/419:40:124
278791992323,0cyclictest0-21swapper/321:45:153
278791992323,0cyclictest0-21swapper/300:00:123
27879199230,22cyclictest0-21swapper/323:10:113
27879199230,22cyclictest0-21swapper/321:55:123
27879199230,22cyclictest0-21swapper/300:30:113
27878699230,4cyclictest397461-21sh22:30:002
27878699230,22cyclictest0-21swapper/223:40:002
27878699230,22cyclictest0-21swapper/222:05:112
27878699230,22cyclictest0-21swapper/220:20:132
27878699230,22cyclictest0-21swapper/220:20:012
27878699230,0cyclictest0-21swapper/220:35:122
27878299230,22cyclictest362490-21apt-get21:30:131
27878299230,22cyclictest347757-21apt-get21:05:131
27878299230,22cyclictest291651-21apt-get19:30:111
27878299230,22cyclictest0-21swapper/120:20:131
278780992321,2cyclictest466573-21apt-get00:25:130
27878099230,22cyclictest463631-21apt-get00:20:130
27878099230,22cyclictest400882-21apt-get22:35:120
27878099230,22cyclictest0-21swapper/020:30:010
27878099230,22cyclictest0-21swapper/019:40:110
27878099230,22cyclictest0-21swapper/019:35:180
278805992222,0cyclictest0-21swapper/723:30:207
278805992222,0cyclictest0-21swapper/723:05:137
278805992222,0cyclictest0-21swapper/722:15:167
278805992222,0cyclictest0-21swapper/719:45:147
278805992221,1cyclictest312341-21apt-get20:05:127
278805992221,1cyclictest0-21swapper/721:40:007
278805992221,1cyclictest0-21swapper/721:05:127
27880599220,22cyclictest0-21swapper/721:30:007
27880599220,22cyclictest0-21swapper/721:05:007
27880599220,22cyclictest0-21swapper/720:05:017
27880599220,21cyclictest303498-21apt-get19:50:137
27880599220,21cyclictest0-21swapper/721:45:157
27880599220,21cyclictest0-21swapper/721:30:127
27880599220,21cyclictest0-21swapper/720:45:107
27880599220,21cyclictest0-21swapper/700:05:127
27880599220,1cyclictest446455-21ntpq23:50:207
27880599220,1cyclictest438793-21sh23:40:007
27880599220,1cyclictest377217-21apt-get21:55:127
27880599220,1cyclictest350701-21apt-get21:10:137
27880599220,1cyclictest330018-21apt-get20:35:137
278801992221,1cyclictest457724-21apt-get00:10:136
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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