[Various] libc/1712: Performance loss with glibc-2.1.[23] vs 2.1.1

[Andreas Jaeger]

I received the following reply to my comments - Milan please send
further comments to libc-alpha as an reply to my email.

Thanks,
Andreas
> >>>>> "Andreas" == Andreas Jaeger <aj@suse.de> writes:
> 
>     Andreas> It might be that the stack is somehow misaglined for
>     Andreas> doubles and therefore you get such a slowdown - but
>     Andreas> looking at our glibc changes between glibc 2.1.2 and
>     Andreas> 2.1.3 I don't see any change which might affect this.
> 
> Both glibc-2.1.2 and glibc-2.1.3 are bad. Only libraries from
> glibc-2.1.1 and before are OK. The only change I do is define
> LD_LIBRARY_PATH to point to /usr/local/lib for new library and I
> install the old (2.1.1) library on the system, so they are used when
> there is no LD_LIBRARY_PATH defined. I tried C version of the fortran
> program and it doesn't show the problem, but it wasn't completely the
> same. I will try to get something in C.
> 
> Milan
> 
> 
> 
-- 
 Andreas Jaeger
  SuSE Labs aj@suse.de
   private aj@arthur.rhein-neckar.de