New Valgrind 3.2.3 released

Release 3.2.3 (29 Jan 2007)

Updated to fix some problems with recent 3.2.2 release.

This tool is amazing for error checking C and/or C++ programs both in 32-bit and 64-bit mode.

Valgrind 3.2.3
Valgrind news

Sun Chip News

The Register: Sun cheers two SPARC advances in one week

Sun.com Press: Sun Expands Solaris/SPARC CMT Innovation Leadership

New site found

start64 seems to be a great website for general 64-bit news and news of 64-bit software updates.

LFS: a stepping stone to pure 64-bit software

One way to progress to pure 64-bit clean source code, is to add LFS support to your 32-bit code base.
Large File Specification (LFS) is a way of getting 64-bit file handling into your 32-bit code base.

Basically, you need to rebuild your 32-bit code with the following flags passed to your C and/or C++ compiler :

-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64

I've found this to work on every UNIX that I have encountered.

When enabled, all of your 'off_t' variables will be 64-bits wide.
Also you calls to fseek maybe mapped to fseek64 etc.

You should enable this and then work on updating your code base to handle it. You would have to do this anyway for pure 64-bit support.

Links
Wikipedia: LFS

Ubuntu performance : 32-bit vs 64-bit

Phoronix : Ubuntu: 32-bit v. 64-bit Performance

They compare the latest version of Ubuntu and a beta release, to test 64-bit vs. 32-bit performance at various tasks.