On Thu, Jun 09, 2005 at 04:15:55PM -0500, Josh Trutwin wrote: > Just curious, would -march=pentium4 be the best compiler flag for gcc > (3.x) for compiling on a Xeon based server? It depends on which generation Xeon you're running. IIRC, Xeons have been around since Pentium II. Perhaps /proc/cpuinfo will give you a clue as to which -march to use. Nate