Linux-Activists - GCC Channel digest. 94-9-20-8:31

Linux Activists (
Thu, 20 Oct 1994 17:39:17 +0100

ELF timing
Re: ELF patches for XFree86 3.1
100% ELF


From: Kayvan Sylvan <kayvan@Sylvan.COM>
Subject: ELF timing
Date: Wed, 19 Oct 94 17:57 PDT

>>>>> "HJL" == H J Lu <> writes:

>> The new ELF binaries run *much* slower than the a.out binaries, based
>> on my preliminary tests. Anyone else see stuff like this?

HJL> Just a question: Do you have the ELF library in core all the time?
HJL> Please compile your login shell in the shared ELF format first.

I couldn't recompile bash at all (I sent you the bug report), so I
compiled zsh-2.3.1 in both a.out and ELF formats. Each shell then runs
the script which runs the simple g++ program (this way, I can be sure
that the appropriate library is in core).

I used the same compile options on all the various builds.

Here's what happens:

kayvan@satyr$ time /home/src/zsh.elf repeat.zsh 250 Vec.ELF
33.01user 50.45system 1:33.17elapsed 89%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+0minor)pagefaults 0swaps

kayvan@satyr$ time /home/src/zsh.a.out repeat.zsh 250 Vec.a.out
3.38user 33.24system 0:40.11elapsed 91%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+0minor)pagefaults 0swaps

The ELF binaries are still slower. :-(


Kayvan Sylvan | Sylvan Associates | Proud Dad of:
kayvan@Sylvan.COM | Training, Consulting | Katherine Yelena (8/8/89)
PGP Key available. | NLP Master Practitioner | Robin Gregory (2/28/92)

"The trust and respect of a child is an honor to be earned, not demanded."


From: (Michael Riepe)
Subject: Re: ELF patches for XFree86 3.1
Date: Thu, 20 Oct 94 03:06:01 +0100

> Is there any chance you've put the ELF XFree libraries up for ftp anywhere?
> I don't have enough space to build them. :(

I have uploaded the patches and shared libraries to our local FTP
server. You can get them from

Maybe someone in the US can mirror this, it's less than 1MB...

So long,

 Michael Riepe               <>
 Universit"at Hannover
 Institut f"ur Fertigungstechnik und Spanende Werkzeugmaschinen
 Schlosswender Str. 5                  30159 Hannover (Germany)
 ... beware the storm that gathers here ("The Prophet's Song")


From: (H.J. Lu) Subject: 100% ELF Date: Thu, 20 Oct 94 0:42:06 EDT

> > From: (Adam J. Richter) > Subject: Ready for 100% ELF? > Date: Tue, 18 Oct 1994 18:52:00 +0200 > > > > Question: is there anything left in Linux that requires non-ELF > binaries. In particular, do we still need non-ELF binaries to build: > > (a) the kernel, and

Yes. Kernel has to be compiled in a.out. I think it is the time to add ELF support for kernel compilation.

> (b) dynamicly loadable libraries for the Andrew system.

Are you saying "loadable"? Eric is working on dlopen et al. If they are not written in C++ or not using dlclose (), they will be supported when we have dl stuff. We are still looking for a good solution for the shared C++ libraries to work with dlopen/dlclose.

> > I know that andrew can be built under SCO Unix, so I would > assume that there already is an ELF or COFF version of the andrew > dynamically loadable libraries somewhere in the andrew source tree. > I'm just wondering if people have actually done either of these > things yet. >



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