MAGMA Forum

First, in the future, please start a new topic, rather than replying to a 7 year old topic. Your variable names seem mixed up: there are M rows and N cols in C. You are adding beta*C multiple times. Normally I use i for rows, j for cols. Unfortunately k is used for dimension, so we need something el...

On second glance, it doesn't appear that CFLAGS is propagated to CXXFLAGS by CMake, and it won't propagate to Fortran or NVCC for CUDA. Even worse, it doesn't seem that CMake picks up NVCCFLAGS from the environment, so there doesn't appear to be a way to override or append to it, without editing CMa...

That should work. Ideally, CMake would detect 64-bit BLAS, which we do in some other projects (BLAS++) but not yet in MAGMA.
-mark

If you compiled without CMake, then editing magma_mangling.h as you describe should work. But as you noticed, CMake #defines its own mangling macro, called MAGMA_GLOBAL, in the file magma_mangling_cmake.h. The quickest hack to do would be comment out magma_mangling_cmake (or #undef MAGMA_GLOBAL), an...

That seems fine for testing. MAGMA doesn't do anything to detect or prevent faults from bit flips. If the bit happens to be low-order (like 0.00000001), then the difference will be negligible, but if the bit happens to be high-order (like 1.) or an exponent bit, the error is likely to be significant...

We don’t have any plans for band matrices. Since they are closer to being memory bandwidth limited, they would not accelerate well on the GPU.
-Mark

This looks like portions of the really old MAGMA testers. I suggest starting from the code in the current MAGMA testers (though there's a lot you can strip out of those as being testing code). Please be more explicit about what went wrong. Do you mean the matrix A was all zeros on output? What was i...

No, there isn't any particular reason, svd_gpu routines just haven't been developed. Thanks for the request; we'll consider them for future developments.
-mark

Have you tried the latest MAGMA 2.5.1 alpha 1? It should resolve many compiling issues from 2.5.
https://icl.utk.edu/magma/software/index.html
Mark

For complex matrices: magma_[cz]heevd* uses divide-and-conquer magma_[cz]heevr* uses MRRR magma_[cz]heevx* uses QR iteration if MagmaRangeAll, or bisection if MagmaRangeV or MagmaRangeI. For real matrices, only divide-and-conquer is available: magma_[sd]syevd* BTW, MAGMA is at version 2.5, not 2.0. ...