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2025-12-21 - 06:27

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 Sun Dec 21, 2025 00:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1729922460,2sleep017300-21mailstats19:30:280
883622340,2sleep08835-21grep23:10:120
2131421410,2sleep021312-21cat19:45:280
1933821350,2sleep019339-21cat23:50:150
629521250,5chrt6296-21latency_hist20:55:000
2199821210,2sleep022001-21sort21:55:150
769821140,3sleep07738-21memory23:05:190
1316921140,4chrt13165-21ntpq21:20:200
1425821130,4chrt14256-21df_inode21:25:170
10853211218,77sleep010409-21/usr/sbin/munin19:05:250
488321080,3chrt4882-21sed22:55:010
1783221080,3sleep017831-21sort23:45:010
1599921050,3sleep016060-21users21:30:300
2619121040,4chrt26189-21processes22:10:250
258632890,3sleep025888-21ntp_offset00:15:200
16402850,3sleep01699-21wc20:35:280
3622830,2sleep0365-21tr20:30:270
117882810,3sleep011786-21cat21:15:200
11608996628,15cyclictest11293-21munin-plugin-st23:20:000
11608996220,16cyclictest65492chrt23:00:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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