mccalpin@perelandra.cms.udel.edu (John D. McCalpin) (04/16/91)
I am looking for some information on a Fortran parallelizer called (something like) "Force-90" from Pacific Sierra. Anybody out there have any info or experience? -- John D. McCalpin mccalpin@perelandra.cms.udel.edu Assistant Professor mccalpin@brahms.udel.edu College of Marine Studies, U. Del. J.MCCALPIN/OMNET
rchrd@well.sf.ca.us (Richard Friedman) (04/19/91)
mccalpin@perelandra.cms.udel.edu (John D. McCalpin) writes: >I am looking for some information on a Fortran parallelizer >called (something like) "Force-90" from Pacific Sierra. >Anybody out there have any info or experience? >-- Sure do. Its called FORGE. Its a layered product, so if you get the parallelizer option for hypercubes it becomes MIMDIZER (dont blame me for that name! %-) FORGE by itself will restructure FORTRAN77 codes for vectorization (e.g. CRAY). It also has a very sophisticated program browser that utilizes a global database. The browser provides a trace/query function that lets you find things in the program that no context editor would find. E.g. show me everwhere in the program that the variable IX is used as the second subscript in arrays, even when IX is aliased thru subprogram calls. FORGE also has a runtime performance monitor that times subprograms and do loops. FORGE inserts calls to library routines around DO loops and on subprogram entry exit. The timing report summarizes time s spent in each routine, each loop, and produces a dynamic call tree. It is very detailed and allows the user to pinpoint exactly where the program is spending its time. With the parallelizer option FORGE/MIMDIZER will analyze loops for SIMD and MIMD architectures (e.g. CRAY YMP or INTEL/NCUBE). Loops are analyzed globally (ie. a do loop and all the subroutines it calls) and will insert directives for synchronization etc. (e.g. CRAY Microtasking). For MIMD it will two single dimension data decomposition. The great thing about FORGE/MIMDizer is that it works on real industrial strength programs, not toy demos. It is basically a workstation CASE tool written in C under UNIX. It also has an interface to SCCS and supports a "cpp-like" syntax for conditional compilation directives. It runs on a number of platforms (SUN, IRIS, ULTRIX, CRAY UNICOS). An NEC SX3 version is under development and discussions have begun re the Connection Machine. It is certainly NOT public domain and costs a reasonable amount considering the man-hours involved in its development. For further information, you could contact me. But only because you asked. This is not a commercial, so no flames please. The last time I talked about what we were doing at PSR I got my fingertips burned. -- /\=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=/\ \/Richard Friedman (415)540-5216 | rchrd@well.sf.ca.us \/ /\Pacific-Sierra Rsrch (Berkeley) | or well!rchrd@apple.com /\ \/=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=\/
carroll@ssc-vax (Jeff Carroll) (04/20/91)
In article <24311@well.sf.ca.us> rchrd@well.sf.ca.us (Richard Friedman) writes: >mccalpin@perelandra.cms.udel.edu (John D. McCalpin) writes: > >>I am looking for some information on a Fortran parallelizer >>called (something like) "Force-90" from Pacific Sierra. >>Anybody out there have any info or experience? >>-- > >Sure do. Its called FORGE. Its a layered product, so >if you get the parallelizer option for hypercubes it becomes >MIMDIZER (dont blame me for that name! %-) If you're interested in a more detailed description of FORGE, check out "A Guide to FORTRAN on Supercomputers" by Levesque and Williamson; should be available at a good engineering library. It goes into a fair amount of detail about FORGE, since it is in large part a thinly disguised application note from PSR (disguised enough that they could charge money for it). disclaimer: I have not used FORGE, or "MIMDIZER"; from what I know about the latter, it might save you a lot of time if you're developing apps for an iPSC. -- Jeff Carroll carroll@ssc-vax.boeing.com "Do you think I care? ... I have an infinite amount of money." -Bill Gates