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Showing posts from May, 2015

ACML ERROR with LAPACK

Q. I have used ACML and compiled successfully but while running pwscf error *** ACML error : ------- 4 invalid parameter -----. Why do I get this error. Ans. Most   probably you have AMD APU ( I had this and got same error). Old version of ACML probably may not be compatible with pwscf and AMDAPU combination. Updating the ACML 6.0.6 has solved the problem for me. ACML 6.0.6 or higher are support for heterogeneous computing. It used CL version of BLAS (clblas) and FFT (clfft)  libraries which transfers your CPU load to GPU and you get enhanced performance. example code to compile pwscf with opencl is as follows: ./configure BLAS_LIBS="/opt/clAmdBlas1.10.321/lib64/libclAmdBlas.so.1.10.321" FFT_LIBS="/opt/clAmdFft-1.10.321/lib64/libclAmdFft.Runtime.so.1.10.321" LAPACK_LIBS="-L/opt/acml-6.06/gfortran64_mp/lib/x86_64 -lacml_mp" I have used latest version of clAmdBlas, and also clAmdFft and given path to shared library for LAPACK I have given path to...