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2026-05-12 - 11:09

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #7

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.

Total number of samples: 50.5 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 rack5slot7s.osadl.org (updated Tue May 12, 2026 00:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10314224582202,99sleep00-21swapper19:09:410
103949916428,112cyclictest28759-21uname00:10:390
103949916019,117cyclictest3710-21munin-run21:40:030
103949916018,117cyclictest4625-21apt-get21:45:140
103949915916,118cyclictest28651-21apt-get20:55:270
103949915832,104cyclictest11291-21apt-get22:25:160
103949915822,27cyclictest11622-21apt-get19:15:330
103949915818,116cyclictest23773-21sort20:25:040
103949915816,22cyclictest12479-21apt-get19:20:250
103949915815,24cyclictest31945-21/usr/sbin/munin00:30:370
103949915716,119cyclictest28483-21munin-run20:55:030
103949915713,123cyclictest20042-21snmpd21:30:400
103949915710,122cyclictest27219-21sort20:45:420
103949915616,114cyclictest31123-21apt-get21:10:320
103949915612,25cyclictest24152-21grep20:25:550
103949915525,107cyclictest15845-21df_inode22:50:330
103949915515,114cyclictest21992-21grep23:26:050
103949915514,116cyclictest5417-21/usr/sbin/munin21:50:200
103949915427,18cyclictest0-21swapper00:05:010
103949915414,117cyclictest13018-21apt-get22:36:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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