As far as I understand, apt-get install libnuma1 libnuma-dbg libnuma-dev
installs libnuma libraries 64 bit in /usr/lib there also two symlinks /usr/lib32 and /usr/lib64 but there is no trace of the libnuma libraries there. That the computational codes I use run twice as fast at 64 bit than 32 bit thanks francescois well established. On Fri, Apr 3, 2009 at 3:14 AM, Iain Bason <iain.ba...@sun.com> wrote: > > On Apr 2, 2009, at 2:45 PM, Gus Correa wrote: > >> Sorry, I don't have an answer about performance. >> You may need to ask somebody else or google around >> about the relative performance of 32-bit vs. 64-bit mode. > > It is worth trying 64-bit. The performance is going to depend on the > program. Since 64 bit pointers take more cache space, a program that uses a > lot of pointers will run more slowly. However, the x64 architecture has > more registers than the x86 architecture, and that can make a 64 bit program > run faster. Overall, it is probably more common for program to run faster > in 64 bit mode, but your program could be in the minority. > > Iain > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
