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.
Have you been seeing a noticeable increaswe in performance? I'm asking
because the benefits from parallelisation are in most cases far from being
linear, and we ran extensive tests on what the best strategy was;
often (matrix products, for example) we settled on compromise solutions
that appeard to work "well" on the hw/sw combos we had at our disposal,
but of course the more real-life cases we hear, the better we can gauge
multicore usage.
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Riccardo (Jack) Lucchetti
Dipartimento di Scienze Economiche e Sociali (DiSES)
Università Politecnica delle Marche
(formerly known as Università di Ancona)
r.lucchetti(a)univpm.it
http://www2.econ.univpm.it/servizi/hpp/lucchetti
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