10-20-2011
This one's not too hard. You're summing up all the subexpressions of I,k,j,l. Each iteration can be dine on a separate node and "reduced" to a single sum.
Perhaps the easiest way would be to parallelize the outermost loop, splitting the task among N processors and summing each result.
Do you have an MPI environment?
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LEARN ABOUT DEBIAN
binfmtf-interpreter
binfmtf(1) binfmt_C binfmtf(1)
NAME
binfmtf-interpreter - binfmt_misc fortran handler
SYNOPSIS
binfmtf-interpreter fortran-source-file-name [command-line opions ...]
DESCRIPTION
binfmtf-interpreter compiles a fortran source file specified on the command-line using the g77 compiler, and executes the resulting file.
It is designed to be used as a handler for binfmt_misc handler, which is a system used in Linux for handling arbitrary files as executa-
bles.
The command-line options are passed on to the compiled binary.
FILE MAGIC
There is a requirement for Fortran source files to have the magic characters c BINFMTF: at the beginning of the file.
That line also is used to specify the additional command-line options for Fortran compiler.
ENVIRONMENT
G77 The compiler used. The default is to use g77
BINFMTCTMPDIR
Temporary directory used for binary and execution.
Falls back to $TMPDIR $TEMPDIR or /tmp
BINFMTC_DEBUG
enables debug output if set.
BINFMTC_G77_OPTS
Additional G77 options. Use BINFMTC_DEBUG to verify the options being passed on to g77.
The default is -O2 -Wall
AUTHOR
Junichi Uekawa (dancer@debian.org)
Upstream page is available at http://www.netfort.gr.jp/~dancer/software/
SEE ALSO
binfmtasm-interpreter(1), binfmtc-interpreter(1), binfmtcxx-interpreter(1), binfmtf95-interpreter(1), binfmtgcj-interpreter(1)
binfmt_misc Dancer 2005 Jun 4 binfmtf(1)