On Wed, Dec 13, 2006 at 08:13:24PM -0800, [EMAIL PROTECTED] wrote: > Secondly, I would *like* to have SMP on as a default in RELENG_6 for > amd64, as it would avoid doing what I've done twice already- fresh > sysinstall may or may not have installed an SMP kernel but going off and > building GENERIC then lost me my SMP. It's sort a violation of POLA.
Rather close what happened to me and what lead to the commit. On Wed, Dec 13, 2006 at 10:17:02PM -0700, Scott Long wrote: > [EMAIL PROTECTED] wrote: > > Scott Long wrote: > > > There wasn't a full switchover to SMP at 6.0 because an SMP kernel > > > on a UP system incurs a measurable runtime overhead, and we wanted > > > to present a system that showed the best of FreeBSD to people who > > > wanted to run it Then why is sparc64's GENERIC kernel SMP in RELENG_6? > > But David's point is that most AMD64 boxes *are* SMP, not UP. Is > > that wrong? > > 1. There are plenty of single core Opterons and Athlon64 chips still > in service. A few points: * FreeBSD is predominately a server OS, not home desktop OS. * Practically all single core Opteron's are used in multi-socket systems. There are very, very few Opteron single socket, single core Opteron's in service as there are only a very small handful of single socket 940-pin motherboards. * Most Athlon64 single-core CPU's are run in 32-bit "i386" mode. FreeBSD/i386 isn't the platform I (and presumably Matt) are talking about. > Maybe AMD sells more SMP systems now than UP systems, but their prior > sales of UP systems didn't magically disappear overnight. This is not an AMD-only situation. Intel has been selling dual-core processors since 18 April 2005, and now sells quad-core processors. Also, Intel kept Long Model (i.e., EM64T) to the server/workstation segment until its dual-core processors. For instance, most Intel laptops cannot run FreeBSD/AMD64. -- -- David ([EMAIL PROTECTED]) _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/cvs-all To unsubscribe, send any mail to "[EMAIL PROTECTED]"
