Fedora SMP and 12 core cpu's

[JD]

On 09/30/2010 10:12 AM, Tom Horsley wrote:
> On Thu, 30 Sep 2010 09:59:38 -0700
> JD wrote:
>
>> What I would like to know is the degree of granularity
>> of the SMP implementation in Linux.
> Don't know what granularity means :-), but we have run kernel.org
> kernels on up to 64 core machines here at work.
Granularity applies to the locking scheme in the kernel.
It is how the kernel must prevent different cors/cpus from
clobberig the same kernel global data at the same time.

Some locking schemes are coarser than others. There is
an optimal point where further granularity will decrease
performance.

I was looking for papers/studies that may have been done
to see at what degree of granularity the payoff was highest.