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From: zimoun <zimon.toutoune@gmail.com>
To: "Ludovic Courtès" <ludovic.courtes@inria.fr>, guix-science@gnu.org
Subject: Re: “Tuning packages for a CPU micro-architecture”
Date: Thu, 06 Jan 2022 22:32:08 +0100	[thread overview]
Message-ID: <86pmp44kkn.fsf@gmail.com> (raw)
In-Reply-To: <87fsq0eswh.fsf@inria.fr>

Hi Ludo,

Thanks for this nice blog post!

On Thu, 06 Jan 2022 at 17:22, Ludovic Courtès <ludovic.courtes@inria.fr> wrote:

> I’ve found reproducibility to be often depicted as being detrimental to
> performance in HPC circles, so this is a contribution to suggest
> otherwise.

Who knows if an “HPC fool” would not write a ’package-with-tune’
rewriting the ’tune’ properties to all the packages and then run a
world-rebuild. ;-)

Well, the conscious choice of letting ’--tune’ operates only on packages
explicitly marked as “tunable” appears to me a clean design.  It makes a
an explicit and clear separation between “portable-optimized” packages
(almost all) vs “micro-optimized” packages.  The best of both worlds: as
much as possible reproducible, sacrificing for few corner-cases, keeping
the performance for all.


Cheers,
simon


  reply	other threads:[~2022-01-06 21:36 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-06 16:22 Ludovic Courtès
2022-01-06 21:32 ` zimoun [this message]
2022-01-07  9:46   ` Ludovic Courtès

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