SimFactory/ranger-intel11.cfg: Are BLAS and LAPACK compilations on Ranger optimized?

Comments (6)

1. 

   Erik Schnetter

   • removed comment

   The standard BLAS and LAPACK libraries that are distributed with Cactus are not optimised for a particular machine. Yes, it would be interesting to use e.g. the MKL instead.

   Since most Cactus users do not solver large linear systems, the performance of BLAS and LAPACK is probably not that important.

   • 2011-03-07T07:05:29+00:00
2. 

   Ian Hinder

   • removed comment

   I don't like the trend towards building our own versions of libraries on each machine. I see this as a fallback in case there is some problem with the system libraries.

   As Bruno points out, the system versions of libraries might well be optimised or tailored in some other way to the particular machine. Unless there is some problem with the system version (e.g. it has not been built with all required options), I prefer to use that. This will save on compilation time, disk space, and confusion if you have to report an error and the machine admin finds that you are using a nonstandard installation of a library.

   • 2011-03-08T09:00:12+00:00
3. 

   Erik Schnetter

   • removed comment

   I agree.

   The current "trend" towards building these libraries on our own comes from the fact that not many people contribute good settings for these libraries, and so I choose the easiest way (for me) when creating or updating option lists. I would be most happy about contributions.

   • 2011-03-08T10:30:25+00:00
4. 

   Erik Schnetter

   • removed comment

   These options

   BLAS_DIR = NO_BUILD BLAS_LIBS = -mkl

   LAPACK_DIR = NO_BUILD LAPACK_LIBS = -mkl

   should do most of the trick.

   • 2011-10-27T10:07:27+00:00
5. 

   Erik Schnetter

   • changed status to resolved
   • removed comment

   Committed.

   • 2011-10-27T11:06:02+00:00
6. 

   Roland Haas

   • edited description
   • changed status to closed

   • 2019-02-21T20:24:48+00:00
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