home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.os.vms
- Path: sparky!uunet!convex!constellation!geohub.gcn.uoknor.edu!dwight
- From: dwight@geohub.gcn.uoknor.edu (Dwight D. Moore)
- Subject: Re: Question on OpenVMS and VAX FORTRAN
- Originator: usenet@kittyhawk.ecn.uoknor.edu
- Sender: usenet@constellation.ecn.uoknor.edu (Usenet Administrator)
- Message-ID: <By6FK9.C79@constellation.ecn.uoknor.edu>
- Date: Mon, 23 Nov 1992 16:09:44 GMT
- Distribution: comp.lang.fortran
- Reply-To: dwight@geohub.gcn.uoknor.edu
- References: <1992Nov22.152400.14845@doug.cae.wisc.edu>
- Nntp-Posting-Host: kittyhawk.ecn.uoknor.edu
- Organization: Geosciences Computing Network, Univ. of Oklahoma
- Keywords: Fortran, shareable images, MACRO, RTL
- Lines: 55
-
- In article <1992Nov22.152400.14845@doug.cae.wisc.edu>, dafnioti@cae.wisc.edu (Petros Dafniotis)
- writes:
- |>Newsgroups: comp.os.vms
- |>Path:
- |>constellation!convex!convex!darwin.sura.net!spool.mu.edu!uwm.edu!zazen!doug.cae.wisc.edu!dafnioti
- |>From: dafnioti@cae.wisc.edu (Petros Dafniotis)
- |>Subject: Question on OpenVMS and VAX FORTRAN
- |>Organization: College of Engineering, Univ. of Wisconsin--Madison
- |>Distribution: comp.lang.fortran
- |>Date: 22 Nov 92 15:24:00 CST
- |>Message-ID: <1992Nov22.152400.14845@doug.cae.wisc.edu>
- |>Summary: Information requested
- |>Keywords: Fortran, shareable images, MACRO, RTL
- |>Lines: 27
- |>
- |>I have a few questions regarding the new Alpha systems running OpenVMS.
- |>In my research group we decided to purchase one Alpha now and soon more.
- |>However, we do have thousands and thousands lines of code on our VAX/VMS
- |>cluster that we shall need to port. 99.9% of the code is in VAX FORTRAN
- |>and the remaining are in C and MACRO. The questions are"
- |>(*) will shareable images be available in OpenVMS right away the same way
- |> as in VAX/VMS
- |>(*) will OpenVMS fortran be 100% compatible (as language not binaries of
- |> course) with VAX fortran?
- |>(*) are all the wonderful SYS$,LIB$,SMG$ etc routines of system and RTL be
- |> in openVMS totally compatible with the VAX/VMS?
- |>(*) in conclusion: can someone give me some information regarding what will
- |> be different in OpenVMS wrt VAX/VMS (other than binaries and possibly
- |> fundamental types eg. longwords etc)?
- |>(*) can someone point me to a source (ftp,journal,book) where i can learn
- |> more about alpha and OpenVMS?
- |>
- |> E-mail or response on the net is fine. I will summarize the responses in
- |>any case if there is sufficient interest.
- |>
- |> Thank you very much in advance for your time.
- |>
- |> Petros Dafniotis
- |> Graduate Student
- |> Chem Engr Dept,UW-Madison
- |> e-mail: dafnioti@cae.wisc.edu
-
- I ported two models written in FORTRAN to the OpenVMS AXP 1.0, and had no problems,
- but I didn't have alot of system calls to deal with. The main problem can be in memory
- alignment, especially if you use structures. This can cause real performance problems.
- The Alphas come with some documentation on migration, problems, and workarounds
- and descriptions of things to watch out for, like alignment and shared images.
- ----------------------------------------------------------------------------
- Dwight D. Moore
- Geosciences Computing Network
- University of Oklahoma
-
- dwight@geohub.gcn.uoknor.edu (129.15.40.10)
- These opinions do not necessarily represent the opinions of OU or the GCN.
- ----------------------------------------------------------------------------
-