* Re: [Help-gsl] Speed problem
2005-05-25 21:09 ` [Help-gsl] Speed problem Jochen Küpper
@ 2005-05-26 0:38 ` Dirk Eddelbuettel
2005-05-30 14:59 ` C J Kenneth Tan -- OptimaNumerics
1 sibling, 0 replies; 3+ messages in thread
From: Dirk Eddelbuettel @ 2005-05-26 0:38 UTC (permalink / raw)
To: Jochen Küpper; +Cc: gsl-discuss
On 25 May 2005 at 23:09, Jochen Küpper wrote:
| Paolo Zavarise <physics@paolo.zavarise.name> writes:
|
| > GSL 1.6 compiled by myself is five/ten time slower than GSL included in
| > ubuntu (1.5.90, same one I think). I've compiled with configure/make, no
| > options, and installed in a non-default dir.
Is that a recompiled Ubuntu version, or the "straight" Debian package I
maintain? In that case, the flags we use are
DEB_BUILD_GNU_TYPE = $(shell dpkg-architecture -qDEB_BUILD_GNU_TYPE)
DEB_HOST_GNU_TYPE = $(shell dpkg-architecture -qDEB_HOST_GNU_TYPE)
ifneq ($(DEB_BUILD_GNU_TYPE),$(DEB_HOST_GNU_TYPE))
CONFARGS = --host=$(DEB_HOST_GNU_TYPE)
endif
[...]
compilerflags = "-O2 -D_REENTRANT"
[...]
./configure --prefix=/usr \
--enable-shared \
--enable-static \
--with-gnu-ld \
$(CONFARGS)
[...]
$(MAKE) CFLAGS=$(compilerflags)
i.e. it is basically just doing a regular -O2. (-D_REENTRANT is mandated by
Debian Policy as it should make multi-threaded apps behave better, as I
recall, as has no performance implications.)
| Did you compile with optimizations? If not, try setting CFLAGS, i.e.
| ,----
| | export CFLAGS="-g -O2 -pipe -Wall"
| `----
| Best would be to look at the GCC manual...
Also, what are you using as the benchmark, and how are you comparing this?
On a dual-boot system where you may have Atlas under Ubuntu but not on the
second system? Just a thought.
Dirk
--
Statistics: The (futile) attempt to offer certainty about uncertainty.
-- Roger Koenker, 'Dictionary of Received Ideas of Statistics'
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [Help-gsl] Speed problem
2005-05-25 21:09 ` [Help-gsl] Speed problem Jochen Küpper
2005-05-26 0:38 ` Dirk Eddelbuettel
@ 2005-05-30 14:59 ` C J Kenneth Tan -- OptimaNumerics
1 sibling, 0 replies; 3+ messages in thread
From: C J Kenneth Tan -- OptimaNumerics @ 2005-05-30 14:59 UTC (permalink / raw)
To: Paolo Zavarise; +Cc: Jochen K�pper, gsl-discuss
[-- Attachment #1: Type: TEXT/PLAIN, Size: 1611 bytes --]
Paolo,
What are the operations/functions/routines that you are using? How
are you measuring performance? Which platform is this?
Kenneth Tan
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On 2005-05-25 23:09 +0200 Jochen Küpper (jochen@fhi-berlin.mpg.de) wrote:
> Date: Wed, 25 May 2005 23:09:27 +0200
> From: "[iso-8859-1] Jochen Küpper" <jochen@fhi-berlin.mpg.de>
> To: gsl-discuss@sources.redhat.com
> Subject: Re: [Help-gsl] Speed problem
>
> Paolo Zavarise <physics@paolo.zavarise.name> writes:
>
> > GSL 1.6 compiled by myself is five/ten time slower than GSL included in
> > ubuntu (1.5.90, same one I think). I've compiled with configure/make, no
> > options, and installed in a non-default dir.
>
> Did you compile with optimizations? If not, try setting CFLAGS, i.e.
> ,----
> | export CFLAGS="-g -O2 -pipe -Wall"
> `----
> Best would be to look at the GCC manual...
>
> Greetings,
> Jochen
> --
> Einigkeit und Recht und Freiheit http://www.Jochen-Kuepper.de
> Liberté, Égalité, Fraternité GnuPG key: CC1B0B4D
> (Part 3 you find in my messages before fall 2003.)
>
^ permalink raw reply [flat|nested] 3+ messages in thread