[gmx-users] how can i install sse4.1 and avx_256

[Milan Melicherčík]

Hello,
you need to recompile Gromacs with -DGMX_SIMD=AVX_256 flag. Or not set it and 
cmake should detect and use the best version automatically. 
http://www.gromacs.org/Documentation/Installation_Instructions_4.6
Cheers.

Milan

On Thursday 23 October 2014 13:32:31 Yaser Hosseini wrote:
> hi
> 
> Reading file md.tpr, VERSION 4.6.5 (single precision)
> Using 4 MPI threads
> Compiled acceleration: SSE4.1 (Gromacs could use AVX_256 on this machine,
> which is better)
> 
> how can i use this features for better mdrun speed.
> 
> thanke you.