Re: [Gems-users] Change in ruby network code?

[Mike Marty <mikem@xxxxxxxxxxx>]

1 processor per chip should work fine with the CMP protocols. 

--Mike


Lide Duan wrote:
> Mike,
>
> Thank you for the reply. One more question about the protocol: I know 
> it's mandatory to set the g_PROCS_PER_CHIP to 1 when using SMP 
> protocols, but when using CMP protocols, can we also have one 
> processor on a single chip? or do we need to guarantee at least 2 
> processors per chip when using CMP protocols?
> Thanks,
> Lide
>
> On 7/29/07, *Mike Marty* <mikem@xxxxxxxxxxx 
> <mailto:mikem@xxxxxxxxxxx>> wrote:
>     >
>     >
>     > But I am still concerning the protocol as you mentioned. The
>     protocol
>     > I am using now is MOESI_CMP_directory, and the 16p are placed on 16
>     > chips (1 p on 1 chip). Actually I want to observe the network
>     behavior
>     > of a 16p CMP, but in order to utilize the auto-generated TORUS2D
>     > interconnet, I placed each processor on a single chip, but
>     reduced the
>     > latencies to make the 16p communicate like on a single chip. Is it
>     > resonable to do this? Is there any restriction on the protocol
>     can be
>     > used if I do so?
>     >
>     This is reasonable, but I'm not sure where the directory/memory
>     controllers are placed and plus the default TORUS2D code will
>     create a
>     memory controller for every processor.
>
>     An alternative approach uses FILE_SPECIFIED topology.
>
>     --Mike
>
>     >
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