Re: [Gems-users] A few doubts regarding garnet, gems and errors faced during simulations

[Niket Agarwal <niketa@xxxxxxxxxxxxx>]

All the shortest path calculation is done at the level of nodes which  
are L1s, L2s and directories. Even in the routing tables in the  
routers, the information is stored at the level of nodes. In Garnet,  
there is a NIC corresponding to each node and hence the numbers in the  
matrices/routing tables are for nodes as well as NICs.
Niket

On Oct 9, 2009, at 8:37 PM, Joshi,Madhura R wrote:

> Hi,
> Thanks for the reply Niket. I am not trying to create my own
> messagebuffer class but the ordering property was set to false,
> true ordering was not needed at that point on simulation.
>
> I am trying to play with netdest, as I want to change the
> destination of message.I am trying to decide between the
> destination points when a packet arrives at routing unit and route
> the packet accordingly.Destination points are decided based on
> current destination in the flit message.Whenever using this scheme
> , my packets never reach destination/ a few packets reach
> destination but system faults after that.Destination gets changed
> appropriately as I can see the change in flit but still I face the
> error. (I verified my approach using code in NetworkInterface
> class -flitisizing the message part)
>
> I have a question regarding the 'dist' matrix used in topology to
> hold shortest route values from a source to a destination.If there
> are 16 nodes in system , the matrix size is not 16*16 but much
> larger than that.
> If each number in source place corresponds to a unique source;
> which places/numbers correspond to which routers/ network
> interfaces? I think the table gives total view of the system
> topology but I am not able to make out the candidates represented
> by the numbers.
> Can anyone please elaborate/give pointers on this part?
>
> Thanks in advance.
> Sincerely,
> Madhura
>
>
>
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