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Atlas aborts the build some kind of CPU frequency scaling is detected on the

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build machine because that feature offsets the performance timings. We ignore
that check, however, because with binaries being pre-built on Hydra those
timings aren't accurate for the local machine in the first place. The build log
might show something such as the following:

 | It appears you have cpu throttling enabled, which makes timings
 | unreliable and an ATLAS install nonsensical.  Aborting.
 | See ATLAS/INSTALL.txt for further information
 | Ignoring CPU throttling by user override!

svn path=/nixpkgs/trunk/; revision=32506
This commit is contained in:
Peter Simons 2012-02-23 11:33:26 +00:00
parent 166e87319c
commit e321903ff1
2 changed files with 34 additions and 9 deletions
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35
pkgs/development/libraries/science/math/atlas/default.nix
View File

@ -1,27 +1,46 @@
{ stdenv, fetchurl, gfortran }:
{ stdenv, fetchurl, gfortran, tolerateCpuTimingInaccuracy ? true }:
let
optionalString = stdenv.lib.optionalString;
in
stdenv.mkDerivation {
name = "atlas-3.9.67";
src = fetchurl {
url = mirror://sf/math-atlas/atlas3.9.67.tar.bz2;
sha256 = "06xxlv440z8a3qmfrh17p28girv71c6awvpw5vhpspr0pcsgk1pa";
};
# configure outside of the source directory
# Configure outside of the source directory.
preConfigure = '' mkdir build; cd build; configureScript=../configure; '';
# the manual says you should pass -fPIC as configure arg .. It works
configureFlags = "-Fa alg -fPIC" +
(if stdenv.isi686 then " -b 32" else "");
# * The manual says you should pass -fPIC as configure arg. Not sure why, but
# it works.
#
# * Atlas aborts the build if it detects that some kind of CPU frequency
# scaling is active on the build machine because that feature offsets the
# performance timings. We ignore that check, however, because with binaries
# being pre-built on Hydra those timings aren't accurate for the local
# machine in the first place.
configureFlags = "-Fa alg -fPIC"
+ optionalString stdenv.isi686 " -b 32"
+ optionalString tolerateCpuTimingInaccuracy " -Si cputhrchk 0";
buildInputs = [ gfortran ];
doCheck = true;
meta = {
description = "Atlas library";
homepage = "http://math-atlas.sourceforge.net/";
description = "Automatically Tuned Linear Algebra Software (ATLAS)";
license = "GPL";
homepage = http://math-atlas.sourceforge.net/;
longDescription = ''
The ATLAS (Automatically Tuned Linear Algebra Software) project is an ongoing
research effort focusing on applying empirical techniques in order to provide
portable performance. At present, it provides C and Fortran77 interfaces to a
portably efficient BLAS implementation, as well as a few routines from LAPACK.
'';
};
}

8
pkgs/top-level/all-packages.nix
View File

@ -8296,7 +8296,13 @@ let
### SCIENCE/MATH
atlas = callPackage ../development/libraries/science/math/atlas { };
atlas = callPackage ../development/libraries/science/math/atlas {
# The build process measures CPU capabilities and optimizes the
# library to perform best on that particular machine. That is a
# great feature, but it's of limited use with pre-built binaries
# coming from a central build farm.
tolerateCpuTimingInaccuracy = true;
};
blas = callPackage ../development/libraries/science/math/blas { };