SMP support maturity? AMD64x2 or FX-57?
frank at exit.com
Fri Jul 22 20:27:38 GMT 2005
Brandon Fosdick wrote:
> SMP support in FreeBSD seems to be a perpetually favorite feature to
> gripe about, but every release seems to say that its getting better. I'm
> about to build a new server and am trying to determine if I should go
> with dual procs or just a single. The AMD64x2 is slightly cheaper than
> the FX-57 so I'm leaning that way, but it would be a rather pointless
> savings if SMP isn't well supported.
> So, is SMP in -STABLE ready for primetime? Can it really make use of two
Sigh. You know, I've been running with two processors since 4.1 or
thereabouts. Sure, the BGL scheme is inefficient as far as the kernel
itself is concerned, but for compute-bound user processes it worked just
fine. Naturally I avoided 5.0/1/2 for my production boxen, waiting for the
complete overhaul of SMP to stabilize, but when I booted 5.3, everything
was fine and I haven't looked back.
Personally I don't have the first clue what people have found to gripe
about. It has been good, it got a _lot_ better in 5.x, and it's continuing
Ports to new processor families are an entirely different kettle of fish
and have their own sets of problems, virtually all of which have to do with
the new architecture and not with the general SMP support itself.
Frank Mayhar frank at exit.com http://www.exit.com/
Exit Consulting http://www.gpsclock.com/
More information about the freebsd-stable