Date: Wed, 02 May 2012 23:05:51 +0200 From: Alex Dupre <ale@FreeBSD.org> To: Luigi Rizzo <rizzo@iet.unipi.it> Cc: current@freebsd.org, net@frebsd.org Subject: Re: fast bcopy... Message-ID: <4FA1A1AF.3050503@FreeBSD.org> In-Reply-To: <20120502182557.GA93838@onelab2.iet.unipi.it> References: <20120502182557.GA93838@onelab2.iet.unipi.it>
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Luigi Rizzo ha scritto:
> For small blocks and multiples of 32-64 bytes, i noticed that
> the following is a lot faster (breaking even at about 1 KBytes)
>
> static inline void
> fast_bcopy(void *_src, void *_dst, int l)
> {
> uint64_t *src = _src;
> uint64_t *dst = _dst;
> for (; l> 0; l-=32) {
> *dst++ = *src++;
> *dst++ = *src++;
> *dst++ = *src++;
> *dst++ = *src++;
> }
> }
DJB influence? :-)
--
Alex Dupre
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