mabshoff wrote: > > > On Jan 17, 9:02 am, "calcp...@aol.com" <calcp...@aol.com> wrote: > > Hi, > >> OK, I have a new lab with 25 dualcore 2GHz 64bit AMD Athlons. >> However, I only have a 32bit OS installed (Knoppix DVD which is like >> debian with lots of apps including R and Octave). >> >> Question 1: >> With the setup given above, I should install the 32bit Sage tarball, >> right? > > Yes, the 64 bit build won't run on a 32 bit OS. > >> Question 2: >> Also, will I benefit from upgrading to a 64bit OS (ubuntu or gentoo?) >> first, then installing the 64bit Sage tarball? > > It depends on how much RAM you need to run your computations, i.e. if > the machines have less than 3 or 4GB RAM the benefit of more RAM > address space due to 64 bit isn't there. 32 bit code is smaller and in > many cases runs about as fast as 64 bit code. There are exceptions in > either direction, so if you told us what you wanted to do we could > give you some more pointed advice.
Carl Witty on IRC seemed to indicate that you would see big speedups in some things, like arithmetic (I guess using the 64-bit operations and registers with GMP, maybe?). Can you comment on that? Thanks, Jason --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
