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2025-12-06 - 09:55

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 Sat Dec 06, 2025 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17927302223168,17sleep70-21swapper/719:05:237
17936082219181,25sleep30-21swapper/319:07:523
17934862219170,38sleep20-21swapper/219:06:062
17935172215178,24sleep60-21swapper/619:06:346
17935112214180,22sleep00-21swapper/019:06:280
17935632207177,19sleep50-21swapper/519:07:135
17936422206171,22sleep10-21swapper/119:08:221
17936092205171,21sleep40-21swapper/419:07:524
179399799319,4cyclictest0-21swapper/723:53:237
179398599310,1cyclictest0-21swapper/123:45:011
179399199270,26cyclictest2970800-21systemd-journal20:35:004
1793997992523,1cyclictest1809145-21turbostat19:35:017
1793997992521,3cyclictest2970800-21systemd-journal21:50:007
1793997992521,3cyclictest1916253-21basename22:40:007
1793997992521,3cyclictest1916253-21basename22:39:597
1793985992523,1cyclictest0-21swapper/121:50:001
179399799240,2cyclictest1870505-21basename21:20:007
179399699240,1cyclictest0-21swapper/600:35:006
179399099240,3cyclictest1803180-21awk19:25:013
1793985992422,1cyclictest1818667-21apt-get19:50:121
179398599240,2cyclictest1841421-21apt-config20:29:591
179398199240,23cyclictest0-21swapper/022:05:130
179398199240,23cyclictest0-21swapper/020:15:120
179398199240,23cyclictest0-21swapper/019:20:010
179399799230,2cyclictest1982580-21munin-run00:35:007
179399799230,22cyclictest1858815-21sendmail-msp20:59:597
1793996992321,1cyclictest1939783-21apt-get23:20:146
179399699231,21cyclictest1916219-21basename22:40:006
179399699231,21cyclictest1916219-21basename22:40:006
179399699230,23cyclictest0-21swapper/622:55:146
179399399230,23cyclictest0-21swapper/500:20:105
179399399230,22cyclictest0-21swapper/521:00:005
1793991992321,1cyclictest1864922-21apt-get21:10:124
179399199230,22cyclictest1953898-21apt23:45:014
179399199230,22cyclictest0-21swapper/421:25:004
1793990992323,0cyclictest0-21swapper/320:40:133
1793990992322,1cyclictest1893381-21sendmail-msp22:00:003
1793989992321,1cyclictest1939783-21apt-get23:20:152
179398999230,22cyclictest0-21swapper/222:40:152
179398999230,22cyclictest0-21swapper/222:40:152
179398999230,22cyclictest0-21swapper/222:05:122
179398999230,1cyclictest1847786-21apt-get20:40:132
1793985992321,1cyclictest1879474-21apt-get21:35:131
179398599230,22cyclictest1962999-21apt-get00:00:141
179398599230,22cyclictest0-21swapper/120:35:121
179398599230,21cyclictest0-21swapper/119:20:121
179398599230,1cyclictest1971558-21apt-get00:15:121
1793981992323,0cyclictest0-21swapper/019:45:020
179398199230,23cyclictest1881949-21sendmail-msp21:40:000
179398199230,22cyclictest1980145-21apt-get00:30:140
179398199230,22cyclictest1812705-21apt-get19:40:130
179398199230,22cyclictest0-21swapper/022:10:140
179398199230,22cyclictest0-21swapper/019:25:110
179398199230,1cyclictest1933787-21apt-get23:10:120
179398199230,1cyclictest1830364-21apt-get20:10:160
179398199230,1cyclictest0-21swapper/022:50:000
1793997992222,0cyclictest0-21swapper/720:00:147
1793997992221,1cyclictest0-21swapper/722:05:137
1793997992220,1cyclictest1979722-21munin-run00:30:017
1793997992219,2cyclictest1974435-21apt-get00:20:107
179399799220,22cyclictest1812048-21idleruntime-cro19:40:017
179399799220,21cyclictest1844470-21cron20:34:597
179399799220,21cyclictest0-21swapper/723:55:157
179399799220,21cyclictest0-21swapper/723:45:127
179399799220,21cyclictest0-21swapper/721:50:127
179399799220,21cyclictest0-21swapper/719:25:027
179399799220,21cyclictest0-21swapper/719:10:137
179399799220,1cyclictest1821100-21munin-run19:55:007
179399799220,1cyclictest1-21systemd20:30:007
1793996992221,1cyclictest0-21swapper/619:50:006
179399699220,21cyclictest0-21swapper/623:55:156
179399699220,1cyclictest1867374-21awk21:15:006
179399399220,22cyclictest0-21swapper/519:40:015
179399399220,22cyclictest0-21swapper/500:35:145
179399399220,21cyclictest1977292-21apt-get00:25:165
179399399220,21cyclictest0-21swapper/521:40:105
179399399220,0cyclictest0-21swapper/523:10:125
1793991992220,1cyclictest0-21swapper/420:15:134
1793991992220,1cyclictest0-21swapper/420:00:004
179399199220,22cyclictest0-21swapper/420:40:004
179399199220,1cyclictest1841563-21awk20:30:004
179399199220,1cyclictest0-21swapper/423:35:024
1793990992221,1cyclictest1968704-21apt-get00:10:123
1793990992221,1cyclictest0-21swapper/319:45:013
1793990992220,1cyclictest1800316-21run-parts19:20:013
1793990992220,1cyclictest0-21swapper/321:40:103
179399099220,21cyclictest0-21swapper/322:15:153
179399099220,21cyclictest0-21swapper/320:45:093
179399099220,21cyclictest0-21swapper/320:20:133
179399099220,1cyclictest1858800-21awk21:00:003
179399099220,1cyclictest0-21swapper/300:40:003
179399099220,0cyclictest0-21swapper/320:30:003
1793989992221,1cyclictest0-21swapper/223:25:152
1793989992221,1cyclictest0-21swapper/223:15:002
1793989992221,1cyclictest0-21swapper/221:35:002
1793989992221,0cyclictest0-21swapper/200:15:122
1793989992220,1cyclictest1907652-21perf22:25:002
179398999220,22cyclictest0-21swapper/223:05:002
179398999220,21cyclictest1965433-21munin-run00:05:012
179398999220,21cyclictest0-21swapper/222:34:592
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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