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From: Eric Brown <ecbrown@ericcbrown.com>
To: "Ludovic Courtès" <ludovic.courtes@inria.fr>
Cc: guix-devel <guix-devel@gnu.org>
Subject: Re: LAPACK vs. OpenBLAS
Date: Tue, 29 Jun 2021 11:13:11 -0500	[thread overview]
Message-ID: <87o8bohco8.fsf@ericcbrown.com> (raw)
In-Reply-To: <87im1wrb1b.fsf@gnu.org> ("Ludovic Courtès"'s message of "Tue, 29 Jun 2021 16:38:24 +0200")

Ludovic Courtès <ludovic.courtes@inria.fr> writes:

> Hi Eric,
>
> Eric Brown <ecbrown@ericcbrown.com> skribis:
>
>> There are scenarios where reference BLAS is more stable and/or
>> reproducible than optimized BLAS libraries.  Sometimes its lack of
>> knowledge of OpenBLAS and/or a numerical issue.
>>
>> (cf. GNU R's discussion of which BLAS to use.)
>
> Do you have a pointer to that discussion?
>
> Are there other cases where netlib BLAS is considered more appropriate
> than OpenBLAS because it’s more numerically stable?
>
> Thanks for your feedback,
> Ludo’.

Also:

* More controversially: consider 64-bit addressing.  It is depressing to
  hit 32-bit memory limits on large machines which ought to accomodate
  larger problems. (e.g. -fdefault-integer-8, ILP64)


  parent reply	other threads:[~2021-06-29 16:13 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-24 12:55 LAPACK vs. OpenBLAS Ludovic Courtès
2021-06-24 13:58 ` zimoun
2021-06-24 15:00 ` Eric Brown
2021-06-29 14:38   ` Ludovic Courtès
2021-06-29 16:00     ` Eric Brown
2021-06-29 16:13     ` Eric Brown [this message]
  -- strict thread matches above, loose matches on Subject: below --
2021-08-06 12:32 Paul Garlick

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