| Re: [eigen] some problems with building with AltiVec enabled |
[ Thread Index |
Date Index
| More lists.tuxfamily.org/eigen Archives
]
- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] some problems with building with AltiVec enabled
- From: "Gael Guennebaud" <gael.guennebaud@xxxxxxxxx>
- Date: Fri, 22 Aug 2008 17:01:07 +0200
- Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:in-reply-to:mime-version:content-type :content-transfer-encoding:content-disposition:references; bh=y00W5Jc3TIllpatIpc+MEgK4qfgFPkR/D4EOwyAolXY=; b=r9O15F2RKUGxVnzQrTz1FqdRLW0ArgJWj//xkBBwMSayEB0mBZeAvtT/e9kTBu6Pjv L4482NaMb40nxwxM8b9IcmisbjTSUUeWyHhyuclH9g6g8WYRfUrXUXXqI945D88bVOKb 6r0Pv/TVtuLdUkzJzcOuMUHkWhKlOgsMxs0Jc=
- Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=qNRjUA4e4Ov8LOzKj9UTmbjtRBaapZWdXY8+E0HTeaYRNuBkvZLiN/wRbws2gAKPYi B06rjOXAzW2uSdUaSL0GVNGTfEtwJYG1stYdqECSJFYNoQnpIvNIkIZQAjJ9uVAnsT3K GzK5q7d44AL5HhjUIrzkmidsqeaZUoJ6eXCbE=
On Fri, Aug 22, 2008 at 4:18 PM, <jacob@xxxxxxxxxxxxxxx> wrote:
> I also have numerical stability issues. This is getting annoying because
> determining if a test passes or not often requires to run it several times
> (each time with 10 repeats) to see if failure occurs everytime. This is
> really unfortunate as it could make us ignore a real error that would be
> only occasionally triggerred.
>
exactly. So I have a suggestion (maybe wrong): what about generating
floating point random matrices with a limited number of decimals ?
this way the loss of precision should be significantly reduced and we
should be able to reduce the tolerance thresholds to more decent
values. What do you think ? (we would do that only in the unit tests)
gael.