Re: [Gems-users] MOESI_SMP_hammer question

[Mike Marty <mikem@xxxxxxxxxxx>]

We added an optimization to the AMD Hammer protocol so that data is not 
returned twice on any sharing miss. This requires meta-state to the 
memory controller. It isn't really a directory.
--Mike


Perry Wang wrote:

> Hi,
>
> I’m new to Ruby and couldn’t find much info in the
> list archive so please bear with me.
>
> I was under the impression that opteron based systems
> (< 8P) implement broadcast based MOESI, so I’m a bit
> confused about why there’s a directory implemented
> here  MOESI_SMP_hammer-dir.sm
>
> Could this be modeling after larger systems using,
> say, HORUS chip?
>
> thanks in advance
>
>
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