In sci-libs/caffe2-2.1.2 due to RPATH set to $origin in /usr/lib64/libtorch_cpu.so (part of caffe2), pytorch ignores always uses slowest reference implementation of BLAS and LAPACK. With after `eselect blas set openblas`, here is how resolution works for libtorch_cpu.so: ldd /usr/lib64/libtorch_cpu.so | grep liblapack liblapack.so.3 => /usr/lib64/liblapack.so.3 (0x00007f8934800000) Here is how resolution works for other (correct) libraries : ldd /usr/lib/python3.11/site-packages/numpy/linalg/lapack_lite.cpython-311-x86_64-linux-gnu.so | grep liblapack liblapack.so.3 => /usr/lib64/lapack/openblas/liblapack.so.3 (0x00007f886bc00000) As a result, on zen4, for matrix multiplications resulting binary is 253 times slower than build from pypi and 321 times slower than it could be after extra customizations (I will attach benchmarks to PR). To solve the issue, sci-libs/caffe2 should allow to specify BLAS/LAPACK provider with https://wiki.gentoo.org/wiki/Blas-lapack-switch or build with MKL.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=53a5bc45ce81fd5e1cc56536f408d1eea1c7f537 commit 53a5bc45ce81fd5e1cc56536f408d1eea1c7f537 Author: Sv. Lockal <lockalsash@gmail.com> AuthorDate: 2023-12-31 15:07:04 +0000 Commit: Alfredo Tupone <tupone@gentoo.org> CommitDate: 2023-12-31 16:23:21 +0000 sci-libs/caffe2: add support of blas/lapack providers, including mkl Closes: https://bugs.gentoo.org/921129 Signed-off-by: Sv. Lockal <lockalsash@gmail.com> Closes: https://github.com/gentoo/gentoo/pull/34584 Signed-off-by: Alfredo Tupone <tupone@gentoo.org> profiles/features/musl/package.use.mask | 3 +++ .../{caffe2-2.1.2.ebuild => caffe2-2.1.2-r1.ebuild} | 19 +++++++++++++------ .../caffe2/files/caffe2-2.1.2-fix-openmp-link.patch | 15 +++++++++++++++ sci-libs/caffe2/files/caffe2-2.1.2-fix-rpath.patch | 12 ++++++++++++ sci-libs/caffe2/metadata.xml | 1 + 5 files changed, 44 insertions(+), 6 deletions(-)
