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Re: g77 slow under Linux, fast under Windoze
- To: help-gcc at gnu dot org
- Subject: Re: g77 slow under Linux, fast under Windoze
- From: khan at xraylith dot wisc dot edu (Mumit Khan)
- Date: 1 Oct 1999 15:55:02 GMT
- Followup-To: gnu.gcc.help
- Newsgroups: gnu.gcc.help,gnu.misc.discuss
- Organization: Center for X-ray Lithography, UW-Madison
- References: <37F450CF.5B50C577@physics.unimelb.edu.au>
- Xref: wodc7nx0 gnu.gcc.help:1239 gnu.misc.discuss:5027
In article <37F450CF.5B50C577@physics.unimelb.edu.au>,
Robert Scholten <r.scholten@physics.unimelb.edu.au> wrote:
>Hi Folks,
>Apologies if this is not the right place to ask, but I couldn't find an
>appropriate news group for GNU g77.
gnu.gcc.help is good, and so are the mailing lists mentioned in the GCC
home page at http://gcc.gnu.org/. Please note that I've set followup to
gnu.gcc.help.
>I am very happy with g77, both under Windoze and under Linux. However,
>in running some speed tests, it is much much faster under Windoze. I
>compiled with:
And what version of gcc/g77 are you using? What version of binutils? I
would suspect lack of proper alignment to be the cause here, and that
points to (1) you have older binutils, (2) your linux gcc/g77 was built
with an older binutils that didn't support .p2align etc. The lack of
proper alignment can cause horrible performance problems with f77 code.
Regards,
Mumit