Hi Giovanni, Thanks so much! It works now! I just uninstall all the mpi related packages and re-install just openmpi and meep-openmpi 1.1.1-7. Now it works perfectly. (And it's a surprise to find out that you are replying to my message. Come back to visit when you have time!)
Best regards Boshen On Sat, Apr 23, 2011 at 12:00 PM, <[email protected]>wrote: > Send meep-discuss mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of meep-discuss digest..." > > > Today's Topics: > > 1. How to configure Meep-MPI for single Intel i7 CPU? (Boshen Gao) > 2. How to configure Meep-MPI for single Intel i7 CPU? (gpipc) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 22 Apr 2011 19:32:00 -0400 > From: Boshen Gao <[email protected]> > Subject: [Meep-discuss] How to configure Meep-MPI for single Intel i7 > CPU? > To: [email protected] > Message-ID: <[email protected]> > Content-Type: text/plain; charset="iso-8859-1" > > Hi all, > I am using meep-mpi to simulate some simple 3-D SOI photonic crystal based > structures on my PC. It has an i7-930 Quad-core CPU @ 4 GHz. My problem is, > while I use command > > mpirun -np 4 meep-mpi *****.ctl > > each core will run the code alone, they do not share the work. So each step > will be run four times, a code that took 90 sec on one core now takes more > than 100 sec using all four cores. Now I'm running resolution 32 codes that > takes more than 30 hours. In this case, parallel computation will be of > great help. Has anyone met similar problems or do you have any hints on > what > might go wrong, please? > > Thank you. > > Boshen Gao > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://ab-initio.mit.edu/pipermail/meep-discuss/attachments/20110422/224eda59/attachment.html > > > > ------------------------------ > > Message: 2 > Date: Sat, 23 Apr 2011 11:27:51 +0200 > From: gpipc <[email protected]> > Subject: [Meep-discuss] How to configure Meep-MPI for single Intel i7 > CPU? > To: <[email protected]> > Message-ID: <[email protected]> > Content-Type: text/plain; charset=UTF-8 > > On Fri, 22 Apr 2011 19:32:00 -0400, Boshen Gao > <[email protected]> wrote: > > Hi all, > > I am using meep-mpi to simulate some simple 3-D SOI photonic crystal > based > > structures on my PC. It has an i7-930 Quad-core CPU @ 4 GHz. My problem > is, > > while I use command > > > > mpirun -np 4 meep-mpi *****.ctl > > > > each core will run the code alone, they do not share the work. So each > step > > will be run four times, a code that took 90 sec on one core now takes > more > > than 100 sec using all four cores. Now I'm running resolution 32 codes > that > > takes more than 30 hours. In this case, parallel computation will be of > > great help. Has anyone met similar problems or do you have any hints on > > what > > might go wrong, please? > > > > Thank you. > > > > Boshen Gao > > > Hi, > it happened to me too time ago and as far as I can recall in my csae it > was because I had first installed openmpi, then the ubuntu package for > meep-mpi which was (the version that I installed, I did not check for the > present version) based on MPICH2 and I guess the two different MPI programs > interfered with each other somehow. > > I solved my problem by 1) uninstalling both openmpi and meep-mpi 2) > reinstalling openmpi 3) compiling meep-mpi from source (as I wanted to use > openmpi, which I read somewhere is a little better for multi-core, I may be > wrong though). You may check whether this is the case for you too. > > Cheers, > > Giovanni > > -- > ================================================ > Giovanni Piredda > Postdoc - AK Hartschuh > > Phone: ++49 - (0) 89/2180-77601 > Fax.: ++49 ? (0) 89/2180-77188 > Room: E2.062 > ---------------------------------------- > Message sent by Cup Webmail (Roundcube) > > > > > ------------------------------ > > _______________________________________________ > meep-discuss mailing list > [email protected] > http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss > > End of meep-discuss Digest, Vol 62, Issue 4 > ******************************************* >
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