linux-kernel - Re: Fast memcpy patch

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Message-ID: <CAFLxGvwD83br-kW5TSVefruQ3cxwG6boDdnhMQC1879zotJh1w@mail.gmail.com>
Date:	Wed, 23 Nov 2011 13:06:33 +0100
From:	richard -rw- weinberger <richard.weinberger@...il.com>
To:	"N. Coesel" <nico@...dev.nl>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Fast memcpy patch

On Wed, Nov 23, 2011 at 12:25 PM, N. Coesel <nico@...dev.nl> wrote:
> Dear readers,
> I noticed the Linux kernel still uses a byte-by-byte copy method for memcpy.
> Since most memory allocations are aligned to the integer size of a cpu it is
> often faster to copy by using the CPU's native word size. The patch below
> does that. The code is already at work in many 16 and 32 bit embedded
> products. It should also work for 64 bit platforms. So far I only tested 16
> and 32 bit platforms.

Please note, this is only the fallback implementation.
Each arch has it's own optimized version.

-- 
Thanks,
//richard
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