OpenBLAS

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Need for HGEMM and HGEMV?

2

Since ARM has added support for BGEMM and BGEMV, do we need to add support for HGEMM and HEGMV as well? @Mousius I assume the differences between BGEMM and SBGEMM...

ChipKerchner

The performance of the OpenBlas library decreases when running in multi-threaded environments

6

hello， C++programs run on Ubuntu 24.04 using the OpenBlas library. The function execution time is less than 1ms on a single thread, but it increases several times on multiple threads,...

fanjisheng520

For example on latest `develop`: ``` $ make SYMBOLPREFIX=scipy_ USE_OPENMP=0 DYNAMIC_ARCH=0 USE_THREAD=0 TARGET=PRESCOTT $ make SYMBOLPREFIX=scipy_ PREFIX=$PWD/install install $ grep "dlange" install/include/lapacke.h double LAPACKE_dlange( int matrix_layout, char norm, lapack_int m,...

larsoner

Inaccurate result for `neoversev1` `cblas_sdot` kernel only when using single thread

11

This issue was reported on Nvidia Grace CPU. The reproducer is in Julia, so not entirely minimal, but hopefully it should give you an idea of how to reproduce it...

giordano

Bump xuantie toolchains

3

xctan

Incorrect matrix-matrix multiplication results on Mac

1

Extracting from https://github.com/rust-ndarray/ndarray/issues/1521. The following reproduction fails on Mac M4 (version `0.3.30`) but passes on aarch64 Linux (version `0.3.21`): ```c #include #include #include #include // Include BLAS headers - OpenBLAS...

nvb

QUERY: Reduced performance in certain architecture only to-be-regained by `OPENBLAS_NUM_THREADS=1`

14

Hello, This is probably not a real issue for OpenBLAS but basically a request for information. Over SciPy, we have been receiving sporadic reports that, otherwise identical C translations of...

ilayn

Static linking and "DllMain"

2

Back in 2016, when I tried to fix the static linking issue of OpenBLAS (#813), I did not make any changes to the DllMain function, because as a newcomer, I...

theoractice

cmake --install does not install DLL

4

After a build on windows with the LLVM toolchain, where `BUILD_SHARED_LIBS=ON` and `BUILD_STATIC_LIBS=ON` is used, the `cmake --install . --prefix

mennodeij

certificate for documentation website is not working

2

When i go to https://www.openmathlib.org/OpenBLAS/docs/user_manual/ the certificate is not valid. The site does work with http but not with https. Sometimes browsers will refuse to connect to a http site....

mattip