lun, 15 Feb 2010, Alex Rufon skribis: > now i'm wondering, using the same parallel algorithm which one would > perform better? a 1 cpu quadcore machine or 4 cpu single core machine? > > most of my j system running on the server are still on a 4 cpu intel > xeons. most of the new deployments are using the multi-core units. > > i am under the impression that the single core multi cpu (4 cpu X > single core) setup is faster than the multi-core multi-cpu (2 cpu X > quad core) > but I have no metrics to back this up. just an impression. > > am i right or just batty as usual? > > r/alex > > > Sent from my iPhone You can compose such a long message using iphone. ;-)
IMO it is a misconception that J (or APL) being parallel programming language; contrary J is a vector language. J performance should be able to improve even on single core cpu if the vector processing capacity (simd- single instruction multiple data) of x86 cpu is utilized. -- regards, ==================================================== GPG key 1024D/4434BAB3 2008-08-24 gpg --keyserver subkeys.pgp.net --recv-keys 4434BAB3 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
