Re: AMD64 goodies

[Danial Thom <danial_thom@xxxxxxxxx>]

--- Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx>
wrote:

> 
> :> Hi.
> :> 
> :> I'm running an AMD64. And was wondering if
> :> there is any thing that I
> :> can do, at the moment, that can take
> advantage
> :> of the processor.
> :> Really looking forward to the port, hope
> it's
> :> soon :)
> :> 
> :> I saw the amd64 dir in /usr/src and was just
> :> wondering what can be
> :> doen with it. Also in the handbook the
> kernel
> :> tag amd64 is mentioned.
> :> Tried it but it failed. Obviously something
> :> missing.
> :> 
> :> Any ideas or information? I did google but
> :> didn't come up with anything.
> :> 
> :
> :Don't get too excited. An AMD64 build has much
> :higher kernel/networking latencies in freeBSD
> 5.x
> :than a 32 bit build, so its not a slam dunk to
> be
> :better. 
> :
> :Danial
> 
>     AMD64 support is going to require a
> concerted effort and isn't
>     going to happen until at least the
> journaling and a good chunk of
>     the BGL work is done.  It might not happen
> until next year the way
>     things are going.
> 
>     I don't know why the AMD64 build would be
> slower in FreeBSD 5.x.
>     It should be about the same speed with
> regards to network latencies.
> 
> 					-Matt

If the larger, 64-bit structures cause things
that would normally be in the cache to fall out
it could account for it. I haven't seen any
benchmarks that show otherwise.

Danial


		
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