From bcc370102f4ce254d32d7305c96679eaeee5371e Mon Sep 17 00:00:00 2001 From: Axel Huebl Date: Tue, 23 Feb 2021 00:16:02 -0800 Subject: openblas: add "locking" variant, updated blaspp (#21770) BlasPP by ECP SLATE will fail to install by default (`spack install blaspp`) because: - the default BLAS installation in Spack is OpenBLAS - BlasPP conflicts with `threads=none` for all recent OpenBLAS releases OpenBLAS introduced a threadsafe compile option with 0.3.7+ aka `USE_LOCKING`: ``` 61 # If you want to build a single-threaded OpenBLAS, but expect to call this 62 # from several concurrent threads in some other program, comment this in for 63 # thread safety. (This is done automatically for USE_THREAD=1 , and should not 64 # be necessary when USE_OPENMP=1) 65 # USE_LOCKING = 1 ``` According to tests, with `spack install --test root blaspp`, this exactly addresses the issues in BlasPP tests. It also seems to be a good option to set by default for OpenBLAS and users that do not need this safety net can always disable it. Solve issues with newer OpenBLAS by requiring `+locking` over none-default threading options. --- var/spack/repos/builtin/packages/blaspp/package.py | 7 ++++++- var/spack/repos/builtin/packages/openblas/package.py | 9 +++++++++ 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/var/spack/repos/builtin/packages/blaspp/package.py b/var/spack/repos/builtin/packages/blaspp/package.py index 78532c1fb1..2a012c1ec1 100644 --- a/var/spack/repos/builtin/packages/blaspp/package.py +++ b/var/spack/repos/builtin/packages/blaspp/package.py @@ -29,8 +29,13 @@ class Blaspp(CMakePackage, CudaPackage): depends_on('cmake@3.15.0:', type='build') depends_on('blas') + # only supported with clingo solver: virtual dependency preferences + # depends_on('openblas threads=openmp', when='+openmp ^openblas') + # BLASpp tests will fail when using openblas > 0.3.5 without multithreading support - conflicts('^openblas@0.3.6: threads=none', msg='BLASpp requires openblas multithreading support') + # locking is only supported in openblas 3.7+ + conflicts('^openblas@0.3.6 threads=none', msg='BLASpp requires a threadsafe openblas') + conflicts('^openblas@0.3.7: ~locking', msg='BLASpp requires a threadsafe openblas') def cmake_args(self): spec = self.spec diff --git a/var/spack/repos/builtin/packages/openblas/package.py b/var/spack/repos/builtin/packages/openblas/package.py index 186630960b..87ac9122e2 100644 --- a/var/spack/repos/builtin/packages/openblas/package.py +++ b/var/spack/repos/builtin/packages/openblas/package.py @@ -44,6 +44,7 @@ class Openblas(MakefilePackage): variant('shared', default=True, description='Build shared libraries') variant('consistent_fpcsr', default=False, description='Synchronize FP CSR between threads (x86/x86_64 only)') + variant('locking', default=True, description='Build with thread safety') variant( 'threads', default='none', description='Multithreading support', @@ -126,6 +127,7 @@ class Openblas(MakefilePackage): conflicts('+consistent_fpcsr', when='threads=none', msg='FPCSR consistency only applies to multithreading') + conflicts('threads=pthreads', when='~locking', msg='Pthread support requires +locking') conflicts('threads=openmp', when='%apple-clang', msg="Apple's clang does not support OpenMP") conflicts('threads=openmp @:0.2.19', when='%clang', msg='OpenBLAS @:0.2.19 does not support OpenMP with clang!') @@ -255,6 +257,13 @@ class Openblas(MakefilePackage): if self.spec.satisfies('@0.2.16'): make_defs += ['BUILD_LAPACK_DEPRECATED=1'] + # serial, but still thread-safe version + if self.spec.satisfies('@0.3.7:'): + if '+locking' in self.spec: + make_defs += ['USE_LOCKING=1'] + else: + make_defs += ['USE_LOCKING=0'] + # Add support for multithreading if self.spec.satisfies('threads=openmp'): make_defs += ['USE_OPENMP=1', 'USE_THREAD=1'] -- cgit v1.2.3-60-g2f50