On Fri, 2004-12-17 at 13:30 +0000, James Wilkinson wrote:
> However, if the program is dynamically linked, it will need 32 bit
> versions of the libraries. Now some of these libraries will probably
> already be loaded, but on a 64 bit OS, they might well be 64 bit
> versions. So the kernel will probably have to keep 32 bit and 64 bit
> versions of the same libraries loaded. This reduces the efficiency of
> the CPU's caches, and makes less RAM available for hard disk caching.
You mean I/O cache, not CPU cache, libraries are loaded into the address
space of every application and not shared in memory, at least not with
Linux.
> Intel's Itanium CPUs were not designed with 32 bit *performance* as a
> priority, and it shows. They *are* much slower when running 386 code.
This is one of the reasons IA64 is almost dead.
Tom
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