CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > General Forums > Main CFD Forum

FORTRAN

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 2, 2004, 20:21
Default FORTRAN
  #1
Kevin
Guest
 
Posts: n/a
Hi: I have a question about FORTRAN compiler? WHat compiler is best and fastest, and what compiler is good for debugging? Thank you.
  Reply With Quote

Old   June 3, 2004, 01:16
Default Re: FORTRAN
  #2
Leo
Guest
 
Posts: n/a
Thats difficult to tell. The following vendors offer some good ones: Sun Intel NAG Lahey
  Reply With Quote

Old   June 3, 2004, 02:49
Default Re: FORTRAN
  #3
matej
Guest
 
Posts: n/a
Look at the http://www.polyhedron.com/

they have got quite some benchmarks testing speed, debuginess, and other parameters.

The usefullness of compiler differs with platform and OS. We've found out, that for Windows, it's Intel compiler, for Linux its Lahey (taking into account also price).

If you're considering fortran also for user input to one of the CFD commerciall package, check the compiler they support! It will not typically work is another compiler at all.

If you're happy with 77, GNU g77 compiler is quite good and ratio performance/price goes to infinity )))

matej
  Reply With Quote

Old   June 3, 2004, 09:36
Default Re: FORTRAN
  #4
louda
Guest
 
Posts: n/a
Hi, that may depend on your operating system and f77/f95? I have this experience: By far the fastest code produced the f77 by HP on HP-UX 10.?, on the other hand their f90 is realy scrap. F95 by Digital on OSF -- good, but code always crashed when an automatic array was big enough, workaround with allocate/deallocate works. g77 on Linux = forget it. Intel's ifc (f95 compiler) on Linux -- very bugy, they probably don't test it at all. Seems improving, but still is Intel... f95 by NAG on Linux/unix -- by far the best for debugging, most of the work does the switch -C and then watch where it crashes!

Regards, P. Louda
  Reply With Quote

Old   June 3, 2004, 09:49
Default Re: FORTRAN
  #5
Jim_Park
Guest
 
Posts: n/a
Take a look at www.absoft.com .
  Reply With Quote

Old   June 3, 2004, 11:40
Default Re: FORTRAN
  #6
Kevin
Guest
 
Posts: n/a
Thank you all for your replies. The OS I use is Linux. I have found out that for debugging Compaq Visual Fortran is best (if there is any version for Linux), and Lahey is cool from speed viewpoint. Is this correct? Thanks..
  Reply With Quote

Old   June 4, 2004, 02:24
Default Re: FORTRAN
  #7
matej
Guest
 
Posts: n/a
I've found Lahey the fastest from few different compilers. But it was also 2 years ago. New versions, new errors, brand new world...

The final test is always to contact the compiler producer, get a testing demo to test the speed on your code and the level of debuging friendliness. It's worth the money you pay for it.

matej
  Reply With Quote

Old   June 30, 2004, 03:57
Default Re: FORTRAN
  #8
frank muldoon
Guest
 
Posts: n/a
I find the Intel compiler ~15% faster on my code than any other of (PGI, NAG, Lahey). For debugging I use the Lahey and NAG. Also there is an open source f95 compiler: http://g95.sourceforge.net/
  Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fortran Compiler-CFX12.1 Araz CFX 13 March 27, 2017 06:37
Intrinsic Procedure 'ISNAN' in GNU FORTRAN 77 hawk Main CFD Forum 1 April 12, 2005 23:13
visual fortran Monica Main CFD Forum 1 August 28, 2004 21:45
Fortran77 or Fortran 90 Swapnil CFX 2 November 26, 2002 16:16
Why Favoring Fortran over C/C++? Zi-Wei Chiou Main CFD Forum 35 September 26, 2001 10:34


All times are GMT -4. The time now is 07:45.