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2026-06-10 - 14:44

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 Wed Jun 10, 2026 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2831722570,3sleep028316-21wc12:20:240
1633922440,3sleep016343-21latency11:35:160
2064822100,2sleep020651-21netstat07:40:180
2016921360,4sleep020168-21wc09:45:020
2658321270,4chrt26584-21cat10:10:010
2382821210,3chrt23827-21latency_hist12:05:010
2042921120,3chrt20428-21/usr/sbin/munin09:45:170
1526721110,3sleep015273-21df_inode07:20:130
2777421040,2sleep027775-21latency_hist12:20:020
2912521030,4sleep029170-21sendmail10:20:010
1507521020,4sleep015125-21df09:25:100
2119821000,3sleep021213-21munin-run11:55:010
52562990,3sleep05254-21grep08:45:280
9712970,4sleep01006-21proc_pri10:35:240
297612970,4sleep029827-21sort10:20:270
108742970,3sleep010911-21latency_hist11:15:020
292392960,4sleep029240-21sshd08:14:340
167062960,5sleep016770-21mailstats09:30:250
320902950,4sleep032104-21forks08:25:130
151142950,3sleep015158-21ntpq11:30:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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