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2026-11-02 - 12:10

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 Mon Nov 02, 2026 00:44:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29715222240168,23sleep10-21swapper/119:09:491
29715222240168,23sleep10-21swapper/119:09:491
29713772225170,16sleep40-21swapper/419:07:424
29713772225170,16sleep40-21swapper/419:07:424
29715062223184,26sleep30-21swapper/319:09:353
29715062223184,26sleep30-21swapper/319:09:353
29715282221179,27sleep70-21swapper/719:09:557
29715282221179,27sleep70-21swapper/719:09:557
29714522217182,23sleep50-21swapper/519:08:485
29714522217182,23sleep50-21swapper/519:08:475
29712582214174,26sleep00-21swapper/019:06:010
29712582214174,26sleep00-21swapper/019:06:010
29714172213174,24sleep60-21swapper/619:08:176
29714172213174,24sleep60-21swapper/619:08:166
29713842213173,26sleep20-21swapper/219:07:482
29713842213173,26sleep20-21swapper/219:07:482
297174299271,26cyclictest3146387-21awk00:05:002
297175399260,25cyclictest3010795-21ls20:15:016
297175299260,25cyclictest2973449-21ntpq19:10:205
297174899260,25cyclictest3115681-21awk23:10:174
297174899260,25cyclictest3044955-21ntpq21:10:194
297174699260,22cyclictest2978289-21munin-run19:20:003
2971753992518,6cyclictest0-21swapper/619:20:006
297175399250,21cyclictest0-21swapper/622:55:136
297175399250,1cyclictest0-21swapper/620:15:136
297174899250,20cyclictest0-21swapper/420:15:014
2971746992519,6cyclictest0-21swapper/322:30:193
297174699250,1cyclictest0-21swapper/320:50:123
297175599241,1cyclictest3093331-21cut22:35:007
297175599240,23cyclictest3049563-21apt-get21:20:127
297175399240,21cyclictest0-21swapper/623:10:136
2971752992419,4cyclictest3078562-21munin-run22:10:005
297175299240,23cyclictest3127530-21ntp_offset23:30:185
297175299240,23cyclictest0-21swapper/520:15:135
297175299240,1cyclictest3099464-21cat22:45:005
2971748992420,4cyclictest0-21swapper/419:45:004
2971748992419,5cyclictest0-21swapper/419:20:004
2971746992421,2cyclictest3114398-21apt-get23:10:133
2971746992421,2cyclictest3078989-21apt-get22:10:133
2971746992421,2cyclictest0-21swapper/320:25:133
2971746992418,1cyclictest0-21swapper/323:19:593
2971746992418,1cyclictest0-21swapper/321:25:123
2971746992417,1cyclictest0-21swapper/321:15:143
297174699240,23cyclictest0-21swapper/322:40:203
297174699240,23cyclictest0-21swapper/300:30:123
297174699240,21cyclictest0-21swapper/322:55:133
297174699240,21cyclictest0-21swapper/321:30:133
297174699240,1cyclictest0-21swapper/320:00:013
2971741992423,0cyclictest0-21swapper/100:10:121
297174199240,23cyclictest0-21swapper/119:55:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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