N_1/2 for DGEMM depends greatly on where in the memory hierarchy the inputs are. And apps that do small DGEMM tend to have them in cache much of the time. There's a LIBXSMM+NEK paper that likely provides more applicable information. Don't remember if it has KNL numbers but I guess Scott has them. Jeff Sent from my iPhone

On Feb 24, 2017, at 12:31 PM, Jed Brown <[email protected]> wrote:

"Hammond, Jeff R" <[email protected]> writes:

...

Can someone define n_1/2?

https://www.top500.org/project/top500_description/

I'd rather see it reported as execution time.