On 22/02/14 22:15, Nathaniel Smith wrote:
$ make TARGET=SANDYBRIDGE USE_OPENMP=0 BINARY=64 NOFORTRAN=1
You'll definitely want to disable the affinity support too, and probably memory warmup. And possibly increase the maximum thread count, unless you'll only use the library on the computer it was built on. And maybe other things. The OpenBLAS build process has so many ways to accidentally impale yourself, it's an object lesson in why building regulations are a good thing.
Thanks for the advice. Right now I am just testing on my own computer. cblas_dgemm is running roughly 50 % faster with OpenBLAS than MKL 11.1 update 2, sometimes OpenBLAS is twice as fast as MKL. WTF??? :-D Ok, next runner up is Accelerate. Let's see how it compares to OpenBLAS and MKL on Mavericks. Sturla