[Fwd: Re: [Beowulf] Cell in HPC]

Mario Donato Marino mario at regulus.pcs.usp.br
Thu Jun 1 10:50:51 EDT 2006



On Thu, 1 Jun 2006, Greg Lindahl wrote:
Greg
> On Thu, Jun 01, 2006 at 09:07:03AM -0400, Mark Hahn wrote:
>
>>> How do I effectively control placement when I don't know how big my
>>> cache is?
>>
>> I guess you mean you don't know because you can't count on getting
>> any particular fraction of the shared cache, right?
>
> Yes.
>
>> so just do these
>> streaming/blocked reads directly into your per-core cache.  no?
>
> We prefetch into L1 or L2, depending on what's going on. In this case
> L1 is per core and L2 is shared, so you're suggesting we give up
> prefetching/blocking in L2?
How do you do that? By compiler? Manually?

Thanks,

 	Mario

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