Hi Joe, Thanks for the details, it is actually very interesting to have some return of experience. However, my question was actually very unclear (my bad), I was actually looking for more details about the performance gain (10% in average for MPI applications?). I also know that if you start to play with the compiling options you can improve the global performance of your app (both with gcc and the Intel compiler). I am just curious, are your users only using the default compiling options? or do they try to tune the compiling procedure for each compiler? I also wonder if the latest version of GCC will improve performance compared to the Intel compiler; it is supposed to include some auto-vectorization mechanism). But that's another story, i digress here. :-)
On the OSCAR side, the problem with the Intel compiler is the license: we cannot install automatically the Intel compiler without asking the user to agree with Intel licensing stuff, and clearly, currently the only solution to do so is via a hack (we do not have a well-defined method for that). To summarize, my concern is the following: why should we ship OFED compiled with the Intel compiler if you do not have a good support of the Intel compiler by default. My feeling is the usage of the Intel compiler will really be a plus if we can also compile the application. In other term, it seems to me that instead of working on a OFED OPKG compiled with the Intel compiler we should be better off working on a OPKG for the Intel compiler. Do you agree with that? Selon "Greenseid, Joseph M." <[EMAIL PROTECTED]>: > My users find that using the Intel compilers do increase application > performance for them over GCC (especially with x86_64 architecture, because > of the auto-vectorization you can get with the SSE aware compilers). > > Given the choice, none of the folks using my system choose GCC over Intel > (currently, all my users use Intel compilers and Intel flavors of MPI, even > though GCC is also available). > > I would say that the ability to use the Intel compilers with MPI would be > valuable, if OFED is would be considered in OSCAR. If Intel flavors aren't > included, I would probably have to choose to not install it via OSCAR, but > instead do it myself by hand to get them. > > Just the thoughts of one user... > > --Joe > > ________________________________ > > From: [EMAIL PROTECTED] on behalf of > [EMAIL PROTECTED] > Sent: Tue 3/25/2008 12:03 AM > To: [email protected]; Paul Greidanus > Subject: Re: [Oscar-devel] OFED > > > > Hi, > > Just another idea: instead of focusing on the support of multiple compiler > (does > it really improve the global performance for all applications?), why not > working > on the virtualization stuff that are today included in OFED (Panda team work > typically), i.e., VMM-bypass and efficient VM migration? > > That's should be fun to do and it fits perfectly the OSCAR-V extension > (which, i > hope, will be very soon integrated directly into OSCAR). > > My 2 cents, > > Selon Paul Greidanus <[EMAIL PROTECTED]>: > > > Hi All, > > > > I was just looking and thinking about OFED, and how to package it into > > OSCAR, and I'm thinking it might be possible to just copy the SRPMS in, > > and have the oscar build scripts build the RPMS, like the rest of > > oscar? Also, we could use an Intel/pgi compiler to build the RPMS > > pretty easily as well, and have the option of installing optimized > > libraries, rather then just GCC.. > > > > Or do I not know what I'm talking about.. > > > > Paul > > > > ------------------------------------------------------------------------- > > This SF.net email is sponsored by: Microsoft > > Defy all challenges. Microsoft(R) Visual Studio 2008. > > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > > _______________________________________________ > > Oscar-devel mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/oscar-devel > > > > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Oscar-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/oscar-devel > > > ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ Oscar-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/oscar-devel
