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2026-06-19 - 20:47

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #6

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 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack4slot6s.osadl.org (updated Fri Jun 19, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1132823040,3sleep011331-21if_err_eth007:40:140
1789622480,3sleep017897-21uptime12:15:280
2383922150,3sleep023840-21latency_hist10:35:000
1401221340,4chrt13613-21/usr/sbin/munin09:55:250
317421170,3sleep03175-21latency_hist09:15:010
724121110,2sleep07235-21pluginstate07:25:010
1543221060,2sleep015433-21processes07:55:250
268052970,3sleep026803-21awk10:45:190
228902920,4sleep022956-21swap12:35:270
214422900,3sleep021477-21sort08:20:020
221027722,32sleep02219-21df07:05:120
111862700,3sleep011188-21latency_hist07:40:010
50442620,2sleep05046-21grep09:20:270
336599629,21cyclictest8845-21sed07:30:200
3365996230,22cyclictest19264-21runrttasks12:20:420
336599619,18cyclictest7347-21/usr/sbin/munin07:25:230
336599619,18cyclictest4813-21df_inode07:15:140
3365996131,17cyclictest14823-21/usr/sbin/munin12:05:160
3365996034,17cyclictest20428-21/usr/sbin/munin12:25:260
3365996034,16cyclictest26867-21/usr/sbin/munin08:40:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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