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2025-07-15 - 11:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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 20 highest latencies:
System rack5slot3s.osadl.org (updated Tue Jul 15, 2025 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
133862239165,23sleep20-21swapper/219:09:372
130842238163,24sleep30-21swapper/319:05:433
131062237166,58sleep00-21swapper/019:05:590
131072230154,24sleep10-21swapper/119:06:011
13512999390,2cyclictest0-21swapper/220:39:012
13512999390,2cyclictest0-21swapper/220:39:012
13512995854,3cyclictest0-21swapper/220:01:152
278132410,3sleep1221ktimersoftd/100:35:021
207482370,4sleep11350799cyclictest21:50:201
13516993417,8cyclictest15011-21missed_timers22:50:203
13512993432,1cyclictest0-21swapper/221:43:592
13512993432,1cyclictest0-21swapper/221:43:592
1349699312,18cyclictest14265-21perl19:10:160
13516992926,2cyclictest0-21swapper/300:07:093
13516992919,3cyclictest0-21swapper/323:02:543
1349699291,26cyclictest0-21swapper/020:55:120
13496992911,5cyclictest14634-21snmpd20:05:270
189422281,23sleep119137-21df19:20:161
13516992818,3cyclictest0-21swapper/322:01:123
1351699281,20cyclictest0-21swapper/323:11:083
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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