Re: Possible segfault issue in alpha GOTO

[Camm Maguire <camm@enhanced.com>]

Greetings, and thanks for the reply!  Not completely sure yet, but so
far, compiling the libs with full default optimization options, but
the testers with -O at most, seems to work.

R Clint Whaley <rwhaley@cs.utk.edu> writes:

> Since I've never built a dynamically linked lib in my life, I'm not sure
> I can be of great help here.  Goto provides a performance patch for ATLAS
> (I have never scoped it out, just found it today).  It's not a bug fix, but
> it does change the way memory is used by his routines.  You might give it
> a scope:
>    http://members.jcom.home.ne.jp/kgoto/performance_tips_for_atlas.html
> 

Thanks!  I might apply this, but later.  Interesting that small
matrices were involved -- that is where my problem showed too.

> >Here is what I know so far:
> >1) Compiling and testing ev4 config with gcc/g77 2.95 -- check
> >	(i.e. no GOTO assembler, xdl3blastst dynamically linked)
> >
> >2) Compiling and testing ev5 config with gcc/g77 2.95 -- fail
> >	(i.e. with GOTO assembler, xdl3blastst dynamically linked)
> >
> >3) Compiling and testing ev5 config with gcc/g77 2.95 
> >	and xdl3blastst statically linked  -- check
> >
> >4) Compiling and testing ev5 config with gcc/g77 2.95 
> >	and xdl3blastst has only one of reference blas and libatlas 
> >	dynamically linked  -- check
> >
> >5) Compiling and testing ev5 config with gcc/g77 2.95 
> >	with xdl3blastst having both  reference blas and libatlas 
> >	dynamically linked  using g77-3.0  -- fail
> 
> >6) Compiling and testing ev5 config with gcc/g77 2.95 
> >	with xdl3blastst having both  reference blas and libatlas 
> >	dynamically linked and statically linking libg2c.a from
> >	2.95.4 tree using either gcc-3.0 or g77-3.0  -- check
> 
> Again, I'm not the guy here, but doesn't 5-6 indicate it is a gcc/g77 version
> difference causing the problem?
> 

Well, not completely.  Neither version works by itself -- combining
libg2c.a from one with the linker from the other managed to work, but
I think this is an artifact arising from random memory/data/text
arrangement in the executable.

Take care,


> Clint
> 
> 

-- 
Camm Maguire			     			camm@enhanced.com
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"The earth is but one country, and mankind its citizens."  --  Baha'u'llah