Re: [gmx-users] Testing gromacs on IBM POWER8

Hi, On Wed, Sep 2, 2015 at 9:25 PM Fabricio Cannini wrote: > On 27-08-2015 04:17, Mark Abraham wrote: > > Hi, > > > > I have no idea what you're trying to show with these graphs. Your > vertical > > axis of time makes it looks like a 2.5 year old AMD chip is walking all > >

Re: [gmx-users] Testing gromacs on IBM POWER8

On 27-08-2015 04:17, Mark Abraham wrote: Hi, I have no idea what you're trying to show with these graphs. Your vertical axis of time makes it looks like a 2.5 year old AMD chip is walking all over POWER8? Other points 1) GROMACS doesn't use configure or fortran, so don't mention that This is

Re: [gmx-users] Testing gromacs on IBM POWER8

On 27-08-2015 10:03, Szilárd Páll wrote: A few more things to add: - we don't have CPU SIMD kernels for Power8, so comparing the plain C kernels against AVX kernels on AMD is not exactly fair; That was our hypothesis after seeing the results. One of our goals was to assess the readiness of

Re: [gmx-users] Testing gromacs on IBM POWER8

A few more things to add: - we don't have CPU SIMD kernels for Power8, so comparing the plain C kernels against AVX kernels on AMD is not exactly fair; - as Mark pointed out, to use resources efficiently, you'll have to manage thread affinity on Power8 (by default you'll need a stride of 8 to use

Re: [gmx-users] Testing gromacs on IBM POWER8

Hi, I have no idea what you're trying to show with these graphs. Your vertical axis of time makes it looks like a 2.5 year old AMD chip is walking all over POWER8? Other points 1) GROMACS doesn't use configure or fortran, so don't mention that 2) these simulations do not use lapack or blas, so

[gmx-users] Testing gromacs on IBM POWER8

Hello there We've been testing gromacs-5.1-beta1 in an IBM POWER8. The input used is 'pme.mdp' within the .96 directory of the following benchmark: ftp://ftp.gromacs.org/pub/benchmarks/water_GMX50_bare.tar.gz The following link shows our results: