From: Dima Pasechnik Newsgroups: comp.lang.fortran,comp.parallel.pvm Subject: Re: fortran77 programming Date: 30 Nov 1998 16:45:53 +0100 Organization: Delft University of Technology Message-Id: References: <3660D892.E1EDBF12@est.it> Reply-To: d.pasechnik@twi.tudelft.nl Xref: ukc comp.lang.fortran:61739 comp.parallel.pvm:7809 Andres Martinez writes: > On Sun, 29 Nov 1998, Paolo Pumilia wrote: > > > I plan to set up a libc6 based linux box with to processors on > > the mainboard to speed up the execution of cyclic fortran routines. > > I am currenlty involved with dynamilcal simulations in statistical > > physics where two or more do-loops are nested and executed a very > > large number of times. > > I run through parallel-processing howto but i need some quick hints, > > since i am very new to this matter. > > My first questions are: > > - will my fortran77 programs, without any change, > > run in parallel on a two processor machine, provided that kernel > > as been compiled using SMP=1 in the makefile? > > No. The kernel will execute the program on one processor only. In > order to execute the program on more than one processor, you need to > makes changes to your code either manually or through a good compiler > (one that costs $$$). Well, there seems to be a free (for personal use) f90 compiler that supports Linux SMP: http://www.psrv.com/ I didn't try it myself though. There might be other, check up the newest versions of Linux-SMP Howto/FAQ. Dmitrii