Python with ILP64 openBLAS

Rohit_Srivastava · July 17, 2020, 2:33pm

How does one build pytorch with int64_t indexing version of openBLAS to support LAPACK operations on inputs of sizes > 2^32

albanD · July 17, 2020, 3:49pm

Hi,

Once you have your OpenBLAS with int64_t indexing built, you can either put it in a known OpenBLAS install folder like /opt/OpenBLAS/lib or specify its path in LD_LIBRARY_PATH. Then you can run setup.py script with BLAS=OpenBLAS to ensure that it uses OpenBLAS and not another BLAS library.

Rohit_Srivastava · July 17, 2020, 5:22pm

How do one built openBLAS with int64_t support ?

albanD · July 17, 2020, 5:50pm

I don’t know But I’m sure you can find instructions in their repo or online.