RE: [gmx-users] hyperthreading

Hi, In Gromacs 4.5 there is no difference, since it does not use real thread parallelization. Gromacs 4.5 has a built-in threaded MPI library, but openmpi also has an efficient MPI implementation for shared memory machines. But even with proper thread parallelization I expect the same 15 to 20%

RE: [gmx-users] hyperthreading

Hi, These are nehalem Xeons I presume? Then you get 15 to 20% more performance in Gromacs running 2 vs 1 thread or process per physical core. Berk > Date: Fri, 6 Aug 2010 09:24:11 -0500 > From: dmob...@gmail.com > To: gmx-users@gromacs.org > Subject: [gmx-users] hyperthreading > > Dear All, >

Re: [gmx-users] Hyperthreading throughput increase

Hi Matt, On Jun 2, 2006, at 8:20 PM, [EMAIL PROTECTED] wrote: From my browsing of list archives I can only recall seeing advice that hyperthreading cannot offer more Gromacs performance. For all I know this remains true if you're trying to use MPI to accelerate single calculations on hyperth