Re: Re: Re: 64-bit pentium
For added clarification I wanted to add to my comments. EMT64 is
supported for Linux only since there is no officially shipping version
of Windows 64 available for x86 (64-bit). We are investigating support
for Windows 64-bit for a future version, sometime after that OS is
Specific details of Linux support for x86 (64-bit) processors and for
all other hardware can be seen here:
Wolfram Research, Inc.
Jeff Bryant wrote:
> I apologize ahead for the length of this response, but there are
> several technical details that require explanation.
> Starting with Mathematica 5.1, the EMT64 system is supported as with
> all other x86 (64-bit) processors including the Opteron and Athlon64.
> The EMT64 is Intel's name for their line of x86 (64-bit) processors.
> From Mathematica's point of view, there is no difference in these
> Due to all of the variants of the x86 (64-bit) processor line, it is
> easier to encapsulate the entire processor family under one name rather
> than listing explicitly every variant of the processor line. For this
> reason x86 (64-bit) was chosen since it includes all of these processors.
> The current version of Mathematica is already tuned for the G5 processor
> which means that it is capable of taking advantage of most of its
> capabilities while still maintaining compatability with older G3 and G4
> processors. In fact, it runs much faster than the same version on
> either of those chips. The speed of the G5 has little to do with the
> fact that it is a 64-bit chip, but do to the other architectural
> improvements surrounding it. For this reason, you can still get the
> speed without requiring a 64-bit compiled version. 64-bit typically
> gives you the ability to address more memory than a 32-bit application,
> not speed, although some operations such as big number arithmetic can
> see some speedups from 64-bit optimizations. This is true for all
> 64-bit processors in general.
> It is not possible to take advantage of any 64-bit memory addressing
> for the G5 since the current version of Mac OS X does not support 64-bit
> memory addressing for applications. Apple is working on a new version
> of the OS named Tiger that will hopefully introduce 64-bit memory
> addressing for user applications, but with the current version of the
> OS, there is no way to accomplish this. Tiger OS is not yet shipping,
> so we will have to investigate Mathematica for Tiger for a future
> version. No release date is available for a Tiger compatible Mathematica.
> Wolfram Research is working closely with Apple Computers to provide
> the best possible performance for Mathematica users on Mac OS X. We
> currently address all the memory supported by Mac OS X version 10.3
> (Panther), currently 4GB per process.
> Specific questions about platform support can be directed to Technical
> Support (support at wolfram.com).
> Jeff Bryant
> Wolfram Research, Inc.
> Selwyn Hollis wrote:
>>On Feb 10, 2005, at 2:46 AM, Alan wrote:
>>>When can we expect a version of Mathematica optimized
>>Ditto for Macintosh G5. I presume we'll have to wait for Mathematica
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