Intel Fortran Mac
I've had a Fortran compiler installed on my Intel OS X based Mac, My girlfriend was studying Maths/Stats in University and she had a Fortran based module, and as I'm sure you are aware, in an academic environment requiring Fortran, C is not a substitute, however more robust it may be. I have been working with a fast multipole code in Fortran. It is a black box to me, and I have been having some strangeness when compiling it on my mac. I am using version 11.1 of the compiler, I've got a MacBook Pro running a 2.5 GHz Intel Core 2 Duo on Snow Leopard. Intel Fortran Compiler Professional Edition for Mac OS X can be used on, and develop code for, any Mac system based on an Intel processor. Software requirements are Mac OS. X 10.4.11 or 10.5.4. Intel compiler free download - Intel C Compiler Professional, Intel C Compiler Professional, Intel Visual Fortran Compiler Professional, and many more programs.
Free Fortran Compilers. GFortranBinaries - GCC Wiki Tools - R (and Fortran) for Mac OS X High Performance Computing for Mac OS X GNU Fortran FINK: GNU Compiler Collection Version 4.3 (includes gfortran) The G95 Project f2c. Commercial Fortran Compilers. Intel Fortran Compiler for OS X IBM XL Fortran Compiler for Macintosh OS X Absoft Fortran. Next I install Intel® Parallel Studio XE Cluster Edition (includes Fortran and C/C) from Intel Developer Zone Site. At that site was a free offer the tool for students. The installation was installed the next softwares: But when I try to create a new Fortran Project I didn't find the option on the Visual Studio Community 2017.
The Intel Visual Fortran Composer XE 2011 is a comprehensive set of software development tools that includes the following components: Intel Fortran Compiler, Intel Math Kernel Library and Intel Parallel Debugger Extension. Give Intel Visual.
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I have been working with a fast multipole code in Fortran. It is a black box to me, and I have been having some strangeness when compiling it on my mac.
I am using version 11.1 of the compiler, I've got a MacBook Pro running a 2.5 GHz Intel Core 2 Duo on Snow Leopard.
The code runs fine when I set the optimization flag to -O0, but fails when I use -O2 or -O3. What is bizarre is that the code runs fine on a Linux box, at least with the default -O2 flag.
Anyone have any ideas on what could be causing the issue? It must be something with vectorization.
Vladimir FIntel Fortran Mac Os X
2 Answers
At first glance, and without any further information, I jump to the conclusion that your program is unstable; that is, your program produces very different results (failure vs non-failure in some cases) when you tweak the optimisation (which has all sorts of effects on the code that is generated). Some of the tweaks will have an impact on the results of floating-point arithmetic which can easily cause the difference between success and failure for long-running scientific simulations.
This is a symptom of an underlying 'issue' with the program and I would advise you not to rely on the results of 'successful' runs of the program until you understand it a lot better -- you need to prise open the black box and see what's inside.
At the very least you ought test the sensitivity of your program to small changes in inputs.
High Performance MarkHigh Performance MarkAs already said, it is possible that the final result is numerically sensitive and optimization, which relaxes the arithmetic rules, is resulting in a numeric instability. Or optimization could be revealing a bug in the program. If the code is doing its own memory management (no longer necessary with Fortran 90/95/2003) with an internal array of ints, something could be going wrong different OS. I would investigate further..
I suggest turning on all warning and checking options. If there is a bug and you are lucky they might reveal it or give a clue. At least it is easy to try. Try these options: Ecopy pdf pro office tutorial.
Intel Fortran Matrix Inversion
-check all -traceback -warn all -fstack-protector
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You could also try '-assume protect_parens', which will make ifort compliant with the Fortran standard, and see if that makes the problem go away.
Or maybe the program is assuming that memory is preallocated to some value. Is that a difference from Linux and Mac ?? I think that ifort has options to control this. If it is an old Fortran 77 code, it may assume that local variables are preserved across procedure calls, even without the use of 'save' in the declarations. There is a compiler option to cause all local variables to act as if 'save' were used -- see if that makes a difference.
M. S. B.