Benchmarks: AMD64 vs i386 on Dual 246 Opteron

[David Xu]

Peter Wemm wrote:

>Mysql could also easily be affected by inefficiencies in the amd64
>pthread libraries too.
>
>  
>
libthr on -CURRENT is very similar with Linux NPTL,  think of NPTL's
throughput, the inefficiencies might be in our kernel.  Also the 
bottleneck in
userland might be malloc which does belongs to thread library, Linux has
ptmalloc which is thread friendly.

David Xu