[gmx-developers] gromacs @ AMD Interlagos

[David van der Spoel]

Hi,

we have done some very preliminary benchmarks on AMD Interlagos nodes, 4 
CPUs with 12 cores each. After hearing a report that in fact on these 
machines 2 cores share an FPU and a SSE unit, a colleague tested a 
simple protein in water:

... after a short 1 ns test run, the 24 (2x12) core solution 
outperformed the 48 core one (16.3 ns/day vs. 1.4 ns/day). Restraint on 
protein heavy atoms, NVT, waters mobile, ca. 38000 atoms.

Can anyone confirm this result? It seems excessive to me.

-- 
David van der Spoel, Ph.D., Professor of Biology
Dept. of Cell & Molec. Biol., Uppsala University.
Box 596, 75124 Uppsala, Sweden. Phone:	+46184714205.
spoel at xray.bmc.uu.se    http://folding.bmc.uu.se