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2026-05-12 - 04:44

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 Tue May 12, 2026 00:44:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15813772249173,22sleep40-21swapper/419:05:374
15814342240168,59sleep50-21swapper/519:06:265
15791672231193,25sleep30-21swapper/319:05:113
15815452228190,25sleep20-21swapper/219:08:002
15815702224185,26sleep00-21swapper/019:08:210
15815712222186,24sleep10-21swapper/119:08:221
15815222220182,25sleep60-21swapper/619:07:406
15816242214181,22sleep70-21swapper/719:09:107
158190399269,4cyclictest0-21swapper/523:07:165
158190399269,4cyclictest0-21swapper/522:23:205
158190399269,4cyclictest0-21swapper/521:17:265
1581903992621,4cyclictest1584972-21cat19:15:015
1581903992612,14cyclictest1711344-21ntpq22:45:185
158189299260,25cyclictest1744982-21ls23:45:001
158190699250,24cyclictest1668541-21apt-get21:35:127
158190699250,24cyclictest0-21swapper/720:30:127
1581904992520,4cyclictest1584753-21awk19:15:006
158190399250,5cyclictest1674066-21sleep21:45:005
158190099250,24cyclictest1588454-21cron19:20:004
158190099250,24cyclictest0-21swapper/422:45:124
158189899250,24cyclictest1620880-21cron20:15:013
1581889992524,1cyclictest0-21swapper/020:10:130
1581906992420,3cyclictest1591863-21apt-get19:25:127
158190699240,24cyclictest0-21swapper/719:45:187
158190699240,1cyclictest1759864-21basename00:10:007
1581904992423,1cyclictest1674058-21munin-run21:45:016
1581904992421,2cyclictest1691840-21ls22:14:596
158190499240,23cyclictest1677020-21apt21:50:006
158190099240,23cyclictest1647415-21munin-run21:00:014
158190099240,23cyclictest0-21swapper/423:35:164
158190099240,23cyclictest0-21swapper/420:45:134
158190099240,23cyclictest0-21swapper/400:05:004
158190099240,1cyclictest1618378-21apt-get20:10:134
158189899240,24cyclictest1633106-21apt-get20:35:133
158189499240,23cyclictest0-21swapper/223:40:132
158189499240,23cyclictest0-21swapper/223:15:112
158189499240,1cyclictest441ktimers/221:05:122
158189299240,24cyclictest0-21swapper/121:00:031
158189299240,23cyclictest1679969-21apt21:55:001
158189299240,23cyclictest1590254-21awk19:20:181
158189299240,23cyclictest0-21swapper/123:05:121
1581889992423,1cyclictest0-21swapper/000:00:110
158190699230,23cyclictest1756861-21apt-get00:05:007
158190699230,22cyclictest1674047-21apt-get21:45:047
158190699230,22cyclictest0-21swapper/723:55:127
158190699230,22cyclictest0-21swapper/722:55:127
158190699230,0cyclictest0-21swapper/700:35:127
1581904992322,0cyclictest0-21swapper/622:20:116
1581904992321,2cyclictest789-21dbus-daemon21:20:016
1581904992321,1cyclictest1680403-21apt-get21:55:126
1581904992319,3cyclictest1733224-21appstreamcli23:25:016
158190499230,22cyclictest1659715-21apt-get21:20:136
158190499230,22cyclictest1606598-21apt-get19:50:136
158190499230,22cyclictest0-21swapper/600:20:136
158190399230,22cyclictest0-21swapper/522:10:135
1581900992321,1cyclictest1623881-21sendmail20:20:014
158190099230,22cyclictest0-21swapper/423:20:114
158190099230,22cyclictest0-21swapper/400:05:024
158190099230,1cyclictest1682911-21apt-get22:00:004
158190099230,1cyclictest0-21swapper/420:25:184
1581898992322,1cyclictest0-21swapper/322:20:113
1581898992322,1cyclictest0-21swapper/320:50:133
1581898992322,1cyclictest0-21swapper/319:15:003
1581898992319,3cyclictest1671060-21sendmail21:40:013
158189899230,23cyclictest1671047-21apt-get21:40:043
1581894992322,1cyclictest1758647-21ntpq00:05:192
1581894992322,1cyclictest0-21swapper/222:25:152
1581894992322,1cyclictest0-21swapper/221:55:112
1581894992321,1cyclictest1659284-21idleruntime-cro21:20:002
1581894992319,3cyclictest1739097-21basename23:35:002
158189499230,22cyclictest0-21swapper/223:25:132
158189499230,22cyclictest0-21swapper/221:35:182
158189499230,22cyclictest0-21swapper/221:00:122
158189499230,22cyclictest0-21swapper/219:55:132
158189499230,22cyclictest0-21swapper/219:55:132
158189499230,22cyclictest0-21swapper/219:50:132
158189499230,22cyclictest0-21swapper/200:30:202
1581892992322,1cyclictest1674513-21apt-get21:45:131
1581892992321,1cyclictest0-21swapper/100:15:001
158189299230,22cyclictest0-21swapper/123:30:121
158189299230,22cyclictest0-21swapper/120:15:191
158189299230,22cyclictest0-21swapper/100:00:121
1581889992323,0cyclictest0-21swapper/019:14:590
1581889992320,3cyclictest1733332-21latency_hist23:24:590
158188999230,23cyclictest1769123-21apt-get00:25:130
158188999230,23cyclictest1612064-21systemctl20:00:000
158188999230,23cyclictest1612064-21systemctl20:00:000
1581906992222,0cyclictest1695230-21apt-get22:20:117
1581906992221,1cyclictest1724735-21apt-get23:10:127
1581906992221,1cyclictest1624283-21apt-get20:20:137
158190699220,22cyclictest0-21swapper/721:35:007
158190699220,22cyclictest0-21swapper/720:15:137
158190699220,21cyclictest1600717-21apt-get19:40:137
158190699220,21cyclictest0-21swapper/722:15:127
158190699220,21cyclictest0-21swapper/722:00:007
158190699220,21cyclictest0-21swapper/721:20:137
158190699220,1cyclictest1655085-21ntpq21:10:217
1581904992221,1cyclictest1754343-21apt-get00:00:106
1581904992221,1cyclictest1715479-21awk22:54:596
1581904992221,1cyclictest0-21swapper/623:35:116
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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