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Re: [Various] libc/1712: Performance loss with glibc-2.1.[23] vs 2.1.1
- To: libc-alpha Mailinglist <libc-alpha at sourceware dot cygnus dot com>
- Subject: Re: [Various] libc/1712: Performance loss with glibc-2.1.[23] vs 2.1.1
- From: Andreas Jaeger <aj at suse dot de>
- Date: 30 Apr 2000 15:16:05 +0200
- Cc: Milan Hodoscek <milan at ala dot cmm dot ki dot si>
- References: <u8r9bn4xa5.fsf@gromit.rhein-neckar.de>
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