I was thinking that this was probably what we wanted to do for HPC....
also, having the option of turning off zero-filling pages....
-eric
On 9/3/07, ron minnich <[EMAIL PROTECTED]> wrote:
> One option for Erik: try changing the segment allocator so that it
> faults in all segment pages on creation. Would this do what you want?
> I will try this if I get time later today. Assuming it is as simple as
> my simple-minded description makes it sound.
>
> If it would, maybe a simple
> echo faultall > /proc/pid/ctl
> would be useful
>
> would be interesting: iterate over all segments, and make sure each
> has a real page for all pages in all segments.
>
> I can see the need for not overcommitting, and also for actually
> creating and filling out the pages on malloc or other allocation.
> Indeed, lack of OS thrashing due to paging is one feature cited by
> proponents of this:
> http://www.cs.sandia.gov/~smkelly/SAND2006-2561C-CUG2006-CatamountDualCore.pdf
>
> ron
>
