linux-kernel - Re: drivers/char/random.c: More futzing about

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Message-ID: <5398BF08.5070005@linux.intel.com>
Date:	Wed, 11 Jun 2014 13:41:44 -0700
From:	"H. Peter Anvin" <hpa@...ux.intel.com>
To:	Theodore Ts'o <tytso@....edu>, George Spelvin <linux@...izon.com>,
	linux-kernel@...r.kernel.org, mingo@...nel.org, price@....edu
Subject: Re: drivers/char/random.c: More futzing about

On 06/11/2014 12:25 PM, Theodore Ts'o wrote:
> On Wed, Jun 11, 2014 at 09:48:31AM -0700, H. Peter Anvin wrote:
>> While talking about performance, I did a quick prototype of random using
>> Skein instead of SHA-1, and it was measurably faster, in part because
>> Skein produces more output per hash.
> 
> Which Skein parameters did you use, and how much stack space was
> required for it?  Skein-512 is described as needing 200 bytes of
> state, IIRC (which I assume most of which comes from Threefish key
> schedule). 
> 

I believe I used Skein-256, but I'd have to dig to find it again.

	-hpa


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