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From: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>, linux-crypto@vger.kernel.org
Subject: Re: [PATCH] crypto/arc4: now arc needs blockcipher support
Date: Sun, 8 Jul 2012 19:46:24 +0200	[thread overview]
Message-ID: <20120708174624.GD2872@breakpoint.cc> (raw)
In-Reply-To: <20120627065247.GE22920@gondor.apana.org.au>

On Wed, Jun 27, 2012 at 02:52:47PM +0800, Herbert Xu wrote:
> > On a side note: do we pull in the blkcipher block mode for each cipher now to
> > gain some extra performance like the openssl project? I was under the
> > impression that is in general not worth it.
> 
> You mean normal block ciphers? Does it really make that much
> of a difference?

Yes. Jussi added block mode for RC4 instead that auto block-mode that is
prefered over the "automatic" one that is generated otherwise. I don't know
how much performance it brings but I would be supprised if it is a lot on an
average CPU. With this patch in I think it is a matter of time until we get
the AES-CBC & and friends block mode optimized code (which should be a little
faster since comparing to calling a function call for the XOR…) you get the
idea.

Sebastian

  reply	other threads:[~2012-07-08 17:46 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-26 16:13 [PATCH] crypto/arc4: now arc needs blockcipher support Sebastian Andrzej Siewior
2012-06-27  0:54 ` Sandy Harris
2012-06-27  4:35   ` Jussi Kivilinna
2012-06-27  6:52 ` Herbert Xu
2012-07-08 17:46   ` Sebastian Andrzej Siewior [this message]
2012-07-08 21:55     ` Jussi Kivilinna

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