[LITMUS^RT] release overhead

[sasna ms]

Hi,
  I am trying to plot graph of release overhead v/s release overhead of
GSN-EDF scheduler . I had created real time tasks using the command "
./mktasks.py -m 8 -t 4 -u 0.5 " and the resulting overhead was traced using
feature-trace tool. The result was
           SCHED2                       0
           RELEASE                 7546
           CXS                            0
           SCHED                        0
           RELEASE LATENCY  23996
           SEND-RESCHED        62376
Each time when i run this i am getting a different value. What is the
reason for that? Should that value remain constant for a particular
scheduler?
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