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2026-06-16 - 18:41

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 Tue Jun 16, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2039822630,2sleep020396-21grep08:15:190
586522410,3sleep05861-21cat07:20:010
2373321230,3sleep023735-21basename10:35:010
1751721190,3sleep017516-21open_files12:15:240
1283121160,3sleep012834-21tr07:45:250
3054721130,5chrt30548-21netstat11:00:190
32699910073,15cyclictest14723-21forks12:05:130
32699910070,18cyclictest4033-21chrt09:17:210
177732980,4sleep017581-21/usr/sbin/munin08:05:220
3269999670,17cyclictest25449-21ntp_states10:40:210
3269999670,15cyclictest21754-21runrttasks08:20:210
3269999667,15cyclictest276-21runrttasks08:28:410
3269999566,17cyclictest6802-21chrt09:28:490
3269999566,16cyclictest18820-21ntp_states12:20:220
3269999468,15cyclictest3319-21/usr/sbin/munin11:20:210
3269999468,15cyclictest15593-21seq07:55:330
3269999468,14cyclictest16686-21/usr/sbin/munin08:00:250
3269999467,14cyclictest24624-21runrttasks08:30:290
3269999467,14cyclictest18643-21latency_hist10:15:010
3269999466,17cyclictest27904-21/usr/sbin/munin08:45:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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