[ILUG] Advice much appreciated.
paul at clubi.ie
Thu Feb 17 16:10:59 GMT 2005
On Thu, 17 Feb 2005, Ronan Cunniffe wrote:
> Yeah, I know. What I meant was that every app has a built in
> assumption about roughly how much RAM is going to be available.
> Not a lot of point making a 64-bit space available to an app with a
> 32-bit mindset.
> As for SIMD, the sad thing is that outside video codec authors,
> just about nobody takes advantage of this stuff. How many people
> on ILUG looked at the Cell architecture and went "yeah, I got to
> get me some of those pipelines!"?
Well SIMD uses outside of graphics are not obvious.
> (Confession: I have studied various technical bits on what SSE can
> do, discussed Altivec with one of my users who had a G4, found some
> accelerated libraries, and have sketched out a few designs for
> pumping stuff through. Actual working code? No. And my other
> users? Mostly using f77... )
I've not studied SIMD extensions, but i've noticed GCC now has
builtins to take advantage of SIMD, if available. Still hard to think
of uses for it though.
> (I come to realise, of course, that stuff like strcmp() could be
> accelerated, and all you require is an appropriate glibc. Is there
> a glibc-for-mmx, or only glibc-for-386?)
There is, least Fedora installs glibc i686.
Paul Jakma paul at clubi.ie paul at jakma.org Key ID: 64A2FF6A
Elevators smell different to midgets.
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