Re: [Gems-users] R: Significance of the parameter NUMBER_OF_VIRTUAL_NETWORKS

[Alaa Alameldeen <alaa@xxxxxxxxxxx>]

I'm not sure this is documented in the existing GEMS wiki. However, you
can learn how to use virtual networks by examining any of the protocols
written in SLICC. As I mentioned earlier, virtual networks are used to
communicate between various system components. For example, a two-level
CMP protocol might have networks for communicating L1->L2 requests, L2->L1
requests, L1->L2 responses, L2->L1 responses, L2->directory requests,
...etc.

You can use any of the existing protocols with all their virtual
network definitions if they are a good fit for your needs. However,
you will typically need to add more virtual networks if you add
another system component (e.g., an L3 cache), or add a different message
type that you do not want to be mixed with other types (e.g., Prefetch
requests, negative acks, ...etc.).

-Alaa

On Tue, 7 Mar 2006, Alessandro Bardine wrote:

> could you (briefly) explain or tell me where to find
> info about virtual networks?
> what are them intended for?
> how should be used?
>
> Thank you,
> Alessandro
>
> > -----Messaggio originale-----
> > Da: Alaa Alameldeen [mailto:alaa@xxxxxxxxxxx]
> > Inviato: lunedì 6 marzo 2006 16.25
> > A: Gems Users
> > Cc: alessandro.bardine@xxxxxxxxxxxx
> > Oggetto: Re: [Gems-users] Significance of the parameter
> > NUMBER_OF_VIRTUAL_NETWORKS
> >
> >
> > Briefly, this parameter should be at least as big as the number of
> > virtual networks you use in your protocol to communicate between
> > different system components. These networks are defined near the top of
> > your component SLICC files. For example, an L2 cache might have the
> > following definition:
> >
> >    MessageBuffer L1RequestToL2Cache, network="From",
> > virtual_network="0", ordered="true";  // a local L1 -> this L2 bank
> >
> > Which specifies that you have a virtual network (#0) from a Local L1
> > cache to an L2 cache bank. Your NUMBER_OF_VIRTUAL_NETWORKS parameter
> > should be at least the number of the distinct virtual network numbers
> > you have (you should count the "From" and "To" networks with the same
> > number as one network).
> >
> > -Alaa
> >
> > Alessandro Bardine wrote:
> > > Could someone give me and explaination of the significance of the ruby
> > > parameter
> > > NUMBER_OF_VIRTUAL_NETWORKS?
> > >
> > > Thank you,
> > > Alessandro Bardne
> > >
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>