Re: [Gretl-devel] questions about built-in multicore support
On Thu, 19 Feb 2015, Artur T. wrote:
Dear Allin and Jack,
I'have observed some increased efficiency in the built-in multi-core support
during the last few months. Just out of curiosity: has really anything
changed in this direction or is it simply my subjective impression that the
CPU usage has substantially increased running the same script on the same
machine?
For instance, on a modern i5 4-core machine almost 2 cores are automatically
exploited for heavy-loop and heavy-matrix computations. On an older AMD
2-core machine the CPU usage is slightly lower but still the 2nd core is at
least used up to 40% or so.
You're quite right. We now include a multi-threaded BLAS/LAPACK
implementation in the Windows builds of gretl, and in addition we use
OpenMP for various built-in operations if the matrices are large
enough.
Allin