Comments on: MPI on Multicore, an OpenMP Alternative? http://www.linux-mag.com/id/4608/ Open Source, Open Standards Sat, 05 Oct 2013 13:48:18 +0000 hourly 1 http://wordpress.org/?v=3.1 By: Ravi Kannan http://www.linux-mag.com/id/4608/#comment-12293 Ravi Kannan Wed, 26 Oct 2011 17:54:45 +0000 http://www.linux-mag.com/id/4608/#comment-12293 Dear Douglas Eadline, The results and the conclusions are very interesting. I do have two related queries: 1. Are the timings for the simulations obtained by running the programs in a Release (production) mode? We did some preliminary tests using the OpenMP constructs i.e. mainly breaking the loops into threads. The Debug version did give reasonable scaling. The Release version gave literally no scaling. Have you encountered such phenomena? 2. Do you have some corresponding results/observations for engineering based problems involving CFD/FEM codes (with domain decomposition). Is there some material (publications) on the above? Thanks for your time, Ravi. Dear Douglas Eadline,

The results and the conclusions are very interesting. I do have two related queries:

1. Are the timings for the simulations obtained by running the programs in a Release (production) mode? We did some preliminary tests using the OpenMP constructs i.e. mainly breaking the loops into threads. The Debug version did give reasonable scaling. The Release version gave literally no scaling. Have you encountered such phenomena?

2. Do you have some corresponding results/observations for engineering based problems involving CFD/FEM codes (with domain decomposition). Is there some material (publications) on the above?

Thanks for your time,
Ravi.

]]> By: hzmonte http://www.linux-mag.com/id/4608/#comment-4911 hzmonte Wed, 30 Nov -0001 00:00:00 +0000 http://www.linux-mag.com/id/4608/#comment-4911 Could you post (the link to) the OpenMP and MPI source code for OpenMP/MPI benchmark apps on the web? Could you post (the link to) the OpenMP and MPI source code for OpenMP/MPI benchmark apps on the web?

]]> By: deadline http://www.linux-mag.com/id/4608/#comment-4912 deadline Wed, 30 Nov -0001 00:00:00 +0000 http://www.linux-mag.com/id/4608/#comment-4912 There is a link in the article. Here it is again:<br /> <br /> NAS Parallel Suite:<br /> <br /> http://www.nas.nasa.gov/Resources/Software/npb.html There is a link in the article. Here it is again:

NAS Parallel Suite:

http://www.nas.nasa.gov/Resources/Software/npb.html

]]> By: tutu http://www.linux-mag.com/id/4608/#comment-4913 tutu Wed, 30 Nov -0001 00:00:00 +0000 http://www.linux-mag.com/id/4608/#comment-4913 <p>love this article, it helps me alot </p> love this article, it helps me alot

]]>