On Sun, May 20, 2012 at 4:07 AM, Josh Boyer <jwboyer(a)redhat.com> wrote:
On Sat, May 19, 2012 at 02:54:33PM +0200, Xose Vazquez Perez wrote:
>
> >* Tue Jan 17 2012 Dave Jones <davej(a)redhat.com>
> >- Rawhide builds now use MAXSMP on x86.
> >- For release builds, set x86-64 to support 64 CPUs.
> > If larger systems become widespread, we can increase in an update.
>
> _today_
>
> amd: 4sockets * 16cores = 64
Awesome. Got that covered still.
> intel: 4sockets * 10cores * 2threads = 80
Which particular CPU/Motherboard combo is that, and how often do we see
it in Fedora?
I'm not opposed to bumping it up to 128 or something, but I'm curious
how many people are actually going to see benefits.
josh
At least in my case I did run Fedora 12-16 on 4S and 8S machines to
test software scalability on (extreme) high-end hardware.
Though, IMHO anyone that's crazy enough to run Fedora on a high-end
4S/8S machine is more than capable of rebuilding the kernel with
CONFIG_NR_CPUS 256...
However, given the fact that x86_64 machines tend to be far less
memory constrained than i686 machines, I doubt that raising the limit
to 128 will cause too many issues. (Isn't NR_CPUS == 512 in el6?)
- Gilboa