What about starting five sessions, one session to communicate with four sessions?
2010/2/15 bill lam <[email protected]>: > lun, 15 Feb 2010, Brian Schott skribis: >> Bill, >> >> Is the simd capacity usage to which you refer referring to the >> software programmer's action (such as avoiding using loops) or to >> hardware design or to software application developer design. I assume >> you mean the programmer, primarily, but I cannot be sure. My >> experience with J has been that eschewing loops improves speed >> dramatically, most notably with the Einstein puzzle solver which I >> first implemented with while. loops and have compared its speed with >> the revised version. > > intel x86 cpu contains fpu (floating point unit) that has this smid > capacity, the feature is called sse/sse2/sse3, AMD or PPC have > similar capacity but called under other names. The fpu have many > registers, but it need low level (assembler) language to feed data > into these registers, suppose an array contains 40 numbers and we > want to multiple the whole array by another number, it can feed data > into fpu 4 numbers at a time and do the multiplication 10 times. This > can only done by re-writing J interpreter and investigating suitable > strategy for each primitive (can be done by Roger only). A even more > exotic alternative to use the GPU inside NVidia card. > > -- > 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 > -- Björn Helgason, Verkfræðingur Fornustekkum II 781 Hornafirði Po Box 127,801 Selfoss , t-póst: [email protected] gsm: +3546985532 sími: +3544781286 http://groups.google.com/group/J-Programming Tæknikunnátta höndlar hið flókna, sköpunargáfa er meistari einfaldleikans góður kennari getur stigið á tær án þess að glansinn fari af skónum /|_ .-----------------------------------. ,' .\ / | Með léttri lund verður | ,--' _,' | Dagurinn í dag | / / | Enn betri en gærdagurinn | ( -. | `-----------------------------------' | ) | (\_ _/) (`-. '--.) (='.'=) ♖♘♗♕♔♙ `. )----' (")_(") ☃☠ ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
