linux-kernel - Re: GCM benchmark

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <1239328288.6384.69.camel@yhuang-dev.sh.intel.com>
Date:	Fri, 10 Apr 2009 09:51:28 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: GCM benchmark

On Thu, 2009-04-09 at 16:21 +0800, Herbert Xu wrote:
> On Thu, Apr 09, 2009 at 03:50:21PM +0800, Huang Ying wrote:
> > Hi, Herbert,
> > 
> > I am working on GCM acceleration with Intel new PCLMULQDQ instructions
> > now. Can you tell me how to do GCM benchmark?
> 
> We need to add the infrastructure for testing AEAD speed.  It can
> be modelled after the cipher/hash speed testing code.

One issue here is that blkcipher testing infrastructure uses
local_bh_disable()/local_irq_disable() to get more accurate result. But
AEAD uses asynchronous interface, something like
wait_for_completion_interruptable() will be used in test path. How to
get more accurate result for testing asynchronous interface? Maybe it
can be: test many times, select the one with best performance. What's
your opinion?

> > BTW: Similar with AES-NI support, I use cryptd to defer requests in soft
> > IRQ context. Now, cryptd uses crypto_hash instead of crypto_shash as
> > child. I think we should change that. If you have not done that, I will
> > do that.
> 
> We need to complete the conversion of all hash algorithms to shash
> first.

Yes.

Best Regards,
Huang Ying


Download attachment "signature.asc" of type "application/pgp-signature" (198 bytes)