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Re: UMA and NUMA - Mermory Architeture

On 9/14/05, Andre Luiz da Silva <andrack@xxxxxxxxx> wrote:
> Hello Friends!
>  
>  I'm studying the kernel memory management in the Linux Kernel, with the
> book:
>  "Understanding the Linux Virtual Memory Manager", but I don't understading
> the 
>  "fundamental" direferences between NUMA and UMA memory architeture.
>  
>  I perform a serach at the Google and the Kernel Documentation
> (Documentation/vm/numa),
>  but this make me very confused...
>  
>  Do Somebody has any explanation about the concepts of NUMA and UMA memory 
>  architeture?
>  
>  
>  Thanks!!!
>  
JUST FIXING MY TOP POSTING...BEFORE SOMEONE POINTS IT OUT.
AFAIU,

UMA --- CPU to Memory bank access times are same.

NUMA -- CPU to memory bank access times are different for different cpus.

So you always want to allocate from the memory bank which is near to you.

correct me if I am wrong.
Raghu

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