On Tuesday 09 January 2007 17:21, Jonathan Horne wrote: > i am finally looking at make.conf and how editing it could improve my > system(s). > > 1) does specifying a cpu architecture really help? It depends, but generally: yes. (although the perceived speed increase is probably marginal) It really helps when you are using programs which use a lot of floating point operations. gcc is then able to use the faster sse2 instructions instead of plain x87 instructions.
> 2) if i am building for a p4-540 (nacona?), a p3, and a p4-xeon, what > problems am i setting myself up for by specifying a cpu type on my build > box? You should choose the lowest common denominator: the p3 in this case. You'll run into trouble if you build programs for a new processor and then run them on an old one. > > at this point, im wondering how to go about building for more than one > architecture effectively. right now, i build one world, and 3 different > kernels, but they are all build with generic options. > > just wondering how i can effectivly leverage my build server to have the > best compile options for my target boxes. > > any suggestions? The kernel probably won't be any faster, but in any case here's how: #make CPUTYPE=pentium4 buildkernel > > thanks, > jonathan Cheers, Pieter _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
