What i s P GAS? W hat c ompilers support P GAS? W hat i nterconnects support PGAS? What are the principal disadvantages of MPI as the multicore sockets grow to larger and larger core counts? A u ser...

What i s P GAS? W hat c ompilers support P GAS? W hat i nterconnects support PGAS?

What are the principal disadvantages of MPI as the multicore

sockets grow to larger and larger core counts?

A u ser comes to yo u w ith a n application t hat i s a ll-MPI a nd

it n eeds mo re memo ry/core t han t hat a vailable o n t he n ode.

What might be some actions that he can take to run his code?

a. Should he try to use fewer cores on the node? Why?

b. Should he try to use OpenMP on the node? Why?