Hi Armin, On 10/29/2013 03:54 PM, Armin Rigo wrote:
On Tue, Oct 29, 2013 at 6:21 PM, Davide Del Vento <ddvento@ucar.edu> wrote:
I don't know. But I do know that processor/thread binding (if that is what you mean by "pin") is *extremely* important in Sandy Bridge, even more than on previous archs. And, oddly enough, in my experience is more difficult to get it right than on previous arch.
Can you point to more information about this?
Well, as I said "in my experience". I can talk about it right here and some runs I did, if you so desire, but I can't point to anybody saying so "officially". I can point you to the following, which also shows that the runtime we use is pretty different (MPI and OpenMP, often from Intel or other proprietary compilers): https://www2.cisl.ucar.edu/resources/yellowstone/using_resources/runningjobs... Ciao, Davide