08-06-2010
Making FORTRAN code more efficient
Hi, I have a very large, very old FORTRAN code that I work with. The code is quite messy and I was wondering if I can speed up execution time by finding subroutines that code execution spends the most time in. Is there any kind of software I can use to see where the code spends most of the execution process?
Also, I made some changes to the code so it writes a whole bunch of extra output files during execution. I just ran the unmodified version of the code and noticed it seems to run a lot faster than my modified version. Does writing to text files bog down the execution that much?
9 More Discussions You Might Find Interesting
1. Programming
Hi,
I am new to this forum and do not know whether this is the appropriate place to post this question. Anyway am trying my luck.
I have a fortran program swanhcat.ftn, which is part of a wave modelling system. There is also a file hcat.nml which is required to run this program. The program's... (9 Replies)
Discussion started by: sandhyakg
9 Replies
2. Programming
Hi there,
I had run into some fortran code to modify. Obviously, it was written without thinking of high performance computing and not parallelized... Now I would like to make the code "on track" and parallel. After a whole afternoon thinking, I still cannot find where to start. Can any one... (3 Replies)
Discussion started by: P_E_M_Lee
3 Replies
3. Shell Programming and Scripting
Hi all,
Need some help in the following code. (Running this code at cygwin in windows vista)
cat /home/ebanpan/Input_Logs/*.log > /home/ebanpan/Input_Logs/input.log
sed '/^Total/d;/^Bye/d;/^Output has been logged/d' /home/ebanpan/Input_Logs/input.log > /home/ebanpan/output.log
this code... (6 Replies)
Discussion started by: bansalpankaj88
6 Replies
4. Programming
I am using doxygen for documenting my fortran code.
I want to write some notes after the header in different parts of the subroutine. Any idea what the tags should be as anything I write after the header is not displayed
... (0 Replies)
Discussion started by: kristinu
0 Replies
5. Shell Programming and Scripting
egrep -v "#" ${SERVERS} | while read shosts
do
grep -Pi "|" ${LOGFILE} | egrep "${snhosts}" | egrep "NOTIFICATION:" | awk -F";" '{print $3}' | sort -n | uniq | while read CEXIST
do
... (6 Replies)
Discussion started by: SkySmart
6 Replies
6. Programming
I have the code below and I want to remove the "go to" statements. Any idea how I can do it?
if (iorder == 0) then
tmincurrent = 1.0e11
if(ireverse == 0 .or. istop /= 1) then
do i = 1, 6
if ((side(i) /= sidelimit(i)) .and. (tminside(i) < tmincurrent)) then
... (1 Reply)
Discussion started by: kristinu
1 Replies
7. Shell Programming and Scripting
Hi all,
I am working on an extremely large collection of text data (about 2 million XML files) in a directory. I have changed the extension from .xml to .dat. Right now I am using this code to remove the XML tags, but the code is way too slow. It seems that it is taking fore-ever:
#ls -1 *.dat... (1 Reply)
Discussion started by: shoaibjameel123
1 Replies
8. Programming
Hi guys,
After compiling a .f90 code and executing it, i get strange characters in the output file like :
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@
Are these windows characters? how can i get rid of this?
Much appreciated.
Paul (1 Reply)
Discussion started by: Paul Moghadam
1 Replies
9. Shell Programming and Scripting
Heyas
I've been told my scipts would be insecure, and to fix that.
Figured i might rethink some parts of my coding style, meanwhile i tried to write an additional catcher.
After reading:
fail : Security Issues - didnt help too much, infact - it confused me even more.
n/a:... (8 Replies)
Discussion started by: sea
8 Replies
LEARN ABOUT DEBIAN
ocamlprof
OCAMLPROF(1) General Commands Manual OCAMLPROF(1)
NAME
ocamlprof - The Objective Caml profiler
SYNOPSIS
ocamlprof [ options ] filename ...
DESCRIPTION
The ocamlprof command prints execution counts gathered during the execution of a Objective Caml program instrumented with ocamlcp(1).
It produces a source listing of the program modules given as arguments where execution counts have been inserted as comments. For instance,
ocamlprof foo.ml
prints the source code for the foo module, with comments indicating how many times the functions in this module have been called. Natu-
rally, this information is accurate only if the source file has not been modified since the profiling execution took place.
OPTIONS
-f dumpfile
Specifies an alternate dump file of profiling information.
-F string
Specifies an additional string to be output with profiling information. By default, ocamlprof(1) will annotate programs with com-
ments of the form (* n *) where n is the counter value for a profiling point. With option -F s the annotation will be (* sn *)
-impl filename
Compile the file filename as an implementation file, even if its extension is not .ml.
-intf filename
Compile the file filename as an interface file, even if its extension is not .mli.
-version
Print version string and exit.
-vnum Print short version number and exit.
-help or --help
Display a short usage summary and exit.
SEE ALSO
ocamlcp(1).
The Objective Caml user's manual, chapter "Profiling".
OCAMLPROF(1)