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Any chance that the machine that was so much slower ran into memory
swapping problems to make it take so much longer?
David Lang
On Wed, 26 Apr 2000, Alan Modra wrote:
> Date: Wed, 26 Apr 2000 11:16:49 +1000 (EST)
> From: Alan Modra <alan@linuxcare.com.au>
> To: Graham Stoney <greyham@research.canon.com.au>
> Cc: Andrew Morton <andrewm@uow.edu.au>,
> Linux kernel mailing list <linux-kernel@vger.rutgers.edu>
> Subject: Re: [PATCH] Generic dead function optimisation
>
> On Wed, 26 Apr 2000, Graham Stoney wrote:
>
> > Yes; makes it backwards compatible, but harder to ensure that it's kicking in.
> > Mind you, since I have to use KEEP in the .lds files, which was introduced to
> > help with --gc-sections, I don't know if the patch will work for folks with
> > very old (i.e. pre --gc-sections) binutils.
>
> Richard Henderson added KEEP mid 1998.
>
> > > Interesting that 'ld --gc-sections' takes about 15x longer than normal.
> >
> > I haven't delved into this, but on PowerPC it takes no longer than normal, and
> > links in under a second. I think what you're seeing is platform specific.
> > Certainly we'd need to keep the x86 folks happy though, so we'd need to sort
> > this out.
>
> I'm really curious about this. ppc uses the same orphan processing as
> x86, ie. ld/emultemp/elf32.em, so both architectures should show the same
> slowdown. I wonder what's different.
>
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