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2026-07-16 - 03:29

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 Thu Jul 16, 2026 00:44:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17301152226163,20sleep30-21swapper/319:08:123
17299572226166,20sleep20-21swapper/219:05:532
17301342222182,26sleep40-21swapper/419:08:294
17302302220186,22sleep60-21swapper/619:09:526
17301862215174,26sleep00-21swapper/019:09:120
17301352213181,21sleep50-21swapper/519:08:305
17300182211178,22sleep70-21swapper/719:06:467
17299742210174,23sleep10-21swapper/119:06:071
1730461992523,1cyclictest0-21swapper/620:25:116
173046199250,24cyclictest0-21swapper/622:10:126
173045899250,24cyclictest0-21swapper/521:30:125
173045299250,24cyclictest0-21swapper/300:15:103
173045099250,24cyclictest0-21swapper/219:50:202
173044799250,24cyclictest0-21swapper/121:55:181
173044799250,24cyclictest0-21swapper/119:35:131
173046299240,24cyclictest0-21swapper/700:00:007
173046299240,0cyclictest0-21swapper/723:20:197
1730458992423,1cyclictest0-21swapper/500:35:125
173045699240,23cyclictest0-21swapper/423:25:114
173045299240,3cyclictest1756483-21ntp_states19:50:203
1730447992422,1cyclictest0-21swapper/119:55:121
1730447992420,3cyclictest1736996-21sendmail19:20:001
173044799240,23cyclictest0-21swapper/123:50:121
1730445992423,1cyclictest1781661-21apt-get20:35:130
1730462992323,0cyclictest0-21swapper/700:00:127
1730462992322,1cyclictest0-21swapper/720:00:007
1730462992321,1cyclictest1876072-21apt-get23:15:117
173046299230,22cyclictest1790499-21apt-get20:50:137
173046299230,22cyclictest1790499-21apt-get20:50:127
173046299230,22cyclictest0-21swapper/721:15:107
173046299230,22cyclictest0-21swapper/700:35:137
173046299230,0cyclictest0-21swapper/722:25:127
1730461992323,0cyclictest0-21swapper/600:35:136
1730461992321,1cyclictest0-21swapper/619:24:596
173046199230,22cyclictest1761046-21apt-get20:00:136
173046199230,22cyclictest0-21swapper/623:30:196
1730458992319,3cyclictest1865551-21ntpq22:55:185
173045899230,23cyclictest1849145-21basename22:30:015
173045899230,23cyclictest0-21swapper/520:20:125
173045899230,22cyclictest0-21swapper/520:45:135
173045899230,0cyclictest0-21swapper/519:10:135
1730456992322,1cyclictest1836199-21ntpq22:05:194
173045699230,22cyclictest1733294-21munin-run19:15:004
173045699230,22cyclictest0-21swapper/422:55:114
173045699230,22cyclictest0-21swapper/420:51:394
173045699230,22cyclictest0-21swapper/420:51:394
173045699230,22cyclictest0-21swapper/420:05:114
173045699230,22cyclictest0-21swapper/400:25:124
173045299230,23cyclictest1744717-21ntpq19:30:193
173045299230,22cyclictest0-21swapper/321:30:013
173045299230,22cyclictest0-21swapper/300:05:123
1730450992322,1cyclictest1896746-21apt-get23:50:122
1730450992322,1cyclictest0-21swapper/222:15:122
1730450992319,3cyclictest1819990-21runrttasks21:40:142
173045099230,23cyclictest1878589-21sendmail23:20:002
173045099230,22cyclictest1914100-21sendmail00:19:592
173045099230,22cyclictest1748789-21munin-run19:39:592
173045099230,22cyclictest0-21swapper/223:40:112
173045099230,22cyclictest0-21swapper/223:10:122
1730447992322,1cyclictest0-21swapper/121:20:121
173044799230,23cyclictest0-21swapper/100:20:001
173044799230,22cyclictest1831829-21apt-get22:00:121
173044799230,22cyclictest0-21swapper/122:05:021
173044799230,22cyclictest0-21swapper/120:40:191
173044799230,1cyclictest1801865-21turbostat21:10:011
173044599230,3cyclictest1900968-21ntpq23:55:150
173044599230,22cyclictest1858394-21apt-get22:45:110
173044599230,22cyclictest0-21swapper/022:30:120
1730462992222,0cyclictest0-21swapper/720:20:117
1730462992221,1cyclictest0-21swapper/720:25:117
1730462992220,1cyclictest0-21swapper/700:25:177
1730462992217,4cyclictest1914075-21cron00:20:007
173046299220,22cyclictest0-21swapper/723:40:127
173046299220,22cyclictest0-21swapper/722:25:017
173046299220,21cyclictest1769869-21apt-get20:15:127
173046299220,21cyclictest0-21swapper/721:30:127
173046299220,0cyclictest0-21swapper/722:10:127
1730461992222,0cyclictest0-21swapper/621:40:146
1730461992221,1cyclictest1763989-21apt-get20:05:126
1730461992221,1cyclictest0-21swapper/621:50:016
1730461992221,0cyclictest0-21swapper/600:00:126
1730461992220,1cyclictest1778717-21apt-get20:30:116
173046199220,22cyclictest1827208-21ntpq21:50:196
173046199220,22cyclictest1795992-21basename21:00:006
173046199220,22cyclictest1795992-21basename21:00:006
173046199220,21cyclictest0-21swapper/623:45:116
173046199220,21cyclictest0-21swapper/620:40:126
1730458992222,0cyclictest0-21swapper/522:20:105
1730458992221,1cyclictest1857971-21munin-run22:44:595
1730458992221,1cyclictest1819987-21apt-get21:40:125
1730458992221,1cyclictest1802294-21apt-get21:10:135
173045899220,22cyclictest1872706-21munin-run23:10:005
173045899220,22cyclictest0-21swapper/519:45:005
173045899220,21cyclictest0-21swapper/523:50:125
173045899220,21cyclictest0-21swapper/523:35:135
173045899220,21cyclictest0-21swapper/521:15:115
173045899220,21cyclictest0-21swapper/521:05:155
173045899220,21cyclictest0-21swapper/519:30:125
173045899220,21cyclictest0-21swapper/500:20:135
173045899220,1cyclictest0-21swapper/522:00:135
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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