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Re: reading ultralinux's faq



> > Whne in 64-bit mode you use a lot more memory to run the same program
> 64-bit in most cases is slower.


Geez, and I got flamed as a clueless luser for saying these things. ;)

(It is _meant_ as a humorous observation, not a gripe, k?)



----- Original Message ----- 
From: "Ben Collins" <bcollins@debian.org>
To: "Martin" <inkubus@interalpha.co.uk>
Cc: "Ottavio Campana" <ottavio@campana.vi.it>; "Debian Sparc"
<debian-sparc@lists.debian.org>
Sent: Friday, November 14, 2003 5:24 PM
Subject: Re: reading ultralinux's faq


> On Fri, Nov 14, 2003 at 08:45:18PM +0000, Martin wrote:
> > > I've read that linux for sparc64 has got a 32 bit userland.
> > >
> > > Why? What's wrong with 64 bit?
> > Nothing is wrong with it par-say BUT in most cases it is unnecessary.
> > Whne in 64-bit mode you use a lot more memory to run the same program -
> > thus the current strategy - 64bit where you actually need 64bit
> > arithmetic and larger address spaces; 32 everywhere else.
>
> 64-bit in most cases is slower. Unless you need the memory mapping, or
> other various 64-bit things (like netfilter tools would be nice, to
> bypass the 64/32 ioctl translations).
>
> > Or at least that's how I understand it.  Also if I am correct Debian
> > stable has recently got all of the tools to build / run 64bit binaries;
> > think the gcc flags are -m32 and -m64 respectively.  If you want a fully
> > 64bit system then source debs might eb the way to go.
>
> Debian stable does not have that. It's Debian unstable that is currently
> ramping up 64-bit support. Also, you don't want a fully 64-bit system.
>
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