Optimization

[llewelly@xmission.com]

Brian D. McGrew <brian@visionpro.com> writes:

> Good morning,
> 
> We have a software tree that we compile for Solaris Sparc and Linux
> X86.  There are several versions this software that we support, 4.5.3
> and 4.7 are still our current versions.  We compile up 4.5.3 for
> Solaris and Linux with gcc-295.  4.7 is compiled with gcc-32.
> 
> The problem that we're seeing is this:  4.5.3 and 4.7 run almost the
> same speed on Linux.  However, on Solaris Sparc 4.5.3 runs about 10x
> faster than the Linux version.

Could you rephrase this? I can't tell whether you mean '4.5.3 on
    solaris is 10 times faster than 4.7 on solaris', or '4.5.3 on
    solaris is 10 times faster than 4.5.3 on linux'.


> All the compile lines and complier
> options are the same (and quoted at the bottom of this message).
> 
> Can someone shed some light on to why me might be seeing this
> problem?

Maybe you should try a profiler?

> The compile line that I pasted is from our Linux build.  The only
> differences between Solaris and Linux is the -mtune=ultrasparc and
> -mcpu-v8 options on Sparc.
> 
> Any ideas???
> 
> 
> -brian
> 
> Brian D. McGrew		{ brian@doubledimension.com ||
> pacemakertaker@yahoo.com }
> --
>  > YOU!  Off my planet!
> 
> Begin forwarded message:
> 
> > From: "Brian D. McGrew" <brian@ultra-trix.visionpro.com>
> > Date: April 27, 2004 6:53:24 AM PDT
> > To: brian@ultra-trix.visionpro.com, brian@visionpro.com,
> > brian@doubledimension.com
> > Subject: GCC
> >
> > /usr/local/gnu/gcc-332/bin/g++ -c -fPIC -g -O0 -DALGODEBUG
                                               ^^^ If performance is
                                               important this could be
                                               a problem.