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2026-08-08 - 12:36

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 50 highest latencies:
System rack8slot4s.osadl.org (updated Sat Aug 08, 2026 00:44:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14176842240168,22sleep00-21swapper/019:08:010
14177302238167,57sleep10-21swapper/119:08:431
14177652232192,26sleep70-21swapper/719:09:137
14175392231197,22sleep60-21swapper/619:05:586
14175852225191,22sleep40-21swapper/419:06:364
14176582224184,25sleep30-21swapper/319:07:393
14175382221189,21sleep50-21swapper/519:05:575
14176482217183,23sleep20-21swapper/219:07:302
141804099280,26cyclictest1439409-21turbostat19:45:003
141803699280,23cyclictest0-21swapper/223:30:052
1418036992720,7cyclictest1530888-21sendmail22:20:012
1418034992722,4cyclictest1606071-21apt-get00:25:101
141803499270,21cyclictest0-21swapper/123:55:001
141803499270,21cyclictest0-21swapper/121:30:111
141803499260,21cyclictest0-21swapper/121:40:101
141805599250,24cyclictest1507262-21turbostat21:40:007
141805599250,23cyclictest1460012-21cron20:20:007
141804499250,23cyclictest1578198-21idleruntime-cro23:40:014
141804099250,24cyclictest0-21swapper/300:30:143
141804099250,1cyclictest1530838-21apt-get22:20:043
1418036992521,3cyclictest1590544-21apt-get00:00:142
141803699250,22cyclictest0-21swapper/200:30:132
141803499250,25cyclictest0-21swapper/123:40:121
141803199250,24cyclictest0-21swapper/023:30:110
1418055992423,1cyclictest1599366-21apt-get00:15:127
1418055992422,1cyclictest1467759-21ntpq20:30:187
141805599240,3cyclictest1480717-21awk20:55:007
141805599240,23cyclictest1539762-21basename22:35:017
1418050992423,1cyclictest1522441-21apt-get22:05:126
1418050992423,1cyclictest0-21swapper/623:00:116
141805099240,24cyclictest0-21swapper/623:10:106
141805099240,24cyclictest0-21swapper/621:30:126
141804799240,24cyclictest1528323-21apt-get22:15:135
1418044992420,3cyclictest1572741-21apt-get23:30:124
141804499240,23cyclictest1436883-21apt-get19:40:094
141804499240,23cyclictest0-21swapper/420:10:114
1418040992420,4cyclictest0-21swapper/323:00:103
1418040992420,3cyclictest1596423-21apt-get00:10:113
141804099240,24cyclictest0-21swapper/322:20:013
141804099240,21cyclictest1457505-21apt-get20:15:133
141804099240,1cyclictest0-21swapper/319:35:123
1418036992419,5cyclictest0-21swapper/223:55:112
141803699240,23cyclictest0-21swapper/222:35:102
1418034992422,2cyclictest1492950-21apt-get21:15:111
1418031992422,1cyclictest3422186-21systemd-journal22:15:000
1418031992422,1cyclictest1484092-21apt-get21:00:130
141803199240,23cyclictest1557929-21apt-get23:05:120
1418055992323,0cyclictest0-21swapper/719:55:117
1418055992322,1cyclictest0-21swapper/719:10:117
141805599230,23cyclictest0-21swapper/721:20:187
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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