From ripley at stats.ox.ac.uk  Thu Nov  6 10:45:14 2008
From: ripley at stats.ox.ac.uk (Prof Brian Ripley)
Date: Thu, 6 Nov 2008 09:45:14 +0000 (GMT)
Subject: [Rd] [R] Building with MKL on Ubuntu
In-Reply-To: <2bc7a5a50811060124w25a9b870k8b51222d9f41335a@mail.gmail.com>
References: <2bc7a5a50811041000u698ccbdm252e2209735192f1@mail.gmail.com>
	<1225827242.4910a3aace7b9@webmail.iarc.fr>
	<2bc7a5a50811050829o2904bddbw8be864d087096640@mail.gmail.com>
	<1225907974.10672.9.camel@seurat.iarc.fr>
	<2bc7a5a50811051001j25ec2359x66009cd74852d9eb@mail.gmail.com>
	<4911E8EB.40305@biostat.ku.dk>
	<1225918922.491209ca64fd5@webmail.iarc.fr>
	<2bc7a5a50811051310y2ccaee02p39a093add499bc9b@mail.gmail.com>
	<2bc7a5a50811051538m4b65e1efuc5c333da454c1ae3@mail.gmail.com>
	<alpine.LFD.2.00.0811060647180.17118@gannet.stats.ox.ac.uk>
	<2bc7a5a50811060124w25a9b870k8b51222d9f41335a@mail.gmail.com>
Message-ID: <alpine.LFD.2.00.0811060944020.8160@gannet.stats.ox.ac.uk>

On Thu, 6 Nov 2008, Anand Patil wrote:

> On Thu, Nov 6, 2008 at 6:48 AM, Prof Brian Ripley <ripley at stats.ox.ac.uk> wrote:
>       And how does that help you? ?At some future point on a real problem you will get
>       incorrect answers/segfault.
>
>       That test was put there as a result of such incorrect results found the hard way.
> 
> 
> I appreciate that... but I never use the complex blas, so in my case the test is preventing me
> from taking advantage of MKL's real blas. Or is the zdotu error symptomatic of a problem that
> would affect the real blas also?

Only complex BLASAFAIK, *but* e.g. lapack uses it internally, AFAIK even 
for real inputs.

> 
> Anand
> 
>

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595


[Rd] [R] Building with MKL on Ubuntu
Prof Brian Ripley