[CST-2] Computer Systems Modeling

[Alvin]

Actually I think I just did 1997.9.3 first part, though it seems a bit too
simple...

I have:

Mean length = 25 packets
Burstiness = 20

Packets generated at 100 packets/s

=> Mean resident time in on state = 0.25 seconds
=> m_off = 1/0.25 = 4 departures/s

Burstiness = utilisation = m_on/m_off

=> m_on = 4 x 20 = 80.

I can't seem to accept this as the right answer...

Alvin

> Hello!
> 
> Just a few questions on Computer Systems Modeling.  Could be irrelevant as
> the course lecturer changed this year (I think...)
> 
> Sorry but I don't think I can summon the effort to type out the question
> from the paper here...
> 
> 1995.8.11 - 1st part okay.  But unsure of how to apply the constraints a)
> and b) to the second part.
> 
> 1997.8.3 - Not entirely certain which Markovian model to apply here.  And in
> part b, it asks for a worst case approximation.  Is this worst case as in
> massive queues?  Or worst case as in crappy arrival times so the punt is
> always full of one person.  Just lots of little things than confuse me.
> 
> 1997.9.3 - Last parts pretty easy.  But first one...  Bad year 1997 was.
> 
> Hope all is well with y'all.
> 
> Alvin
> 
> 
> 
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