On Tue, 3 Feb 2009, Randall Mackie wrote: > Do you have an idea of how much difference there is in computation times > using the Intel MKL optimized libraries versus just having PETSc download > and compile them itself?
Well - petsc primarily uses blas1. And depending upon the application's usage of PETSc - blas could be a reasonable part - but not dominant part of the total run-time. So a higher performance blas should make at most a few percentage points [ perhaps less than 10%] improvement on the total runtime. Typically - it could be much less than that.. -log_summary would be a good place to look at the performance differences.. Satish
