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Re: memove performance of NetBSD
On Thu, Jan 28, 2010 at 02:07:45PM +0530, Channa wrote:
> Thor Lancelot Simon <tls%panix.com@localhost>:
> > On Thu, Jan 28, 2010 at 11:56:09AM +0530, Channa wrote:
> >> Yes the performance improves when the memmove is done as below:
> >> memmove(dst, src+1, sizeof(src));
> >> memmove(dst, src+2, sizeof(src));
> >> memmove(dst, src+3, sizeof(src));
> > That's a pretty weird special case, since the start addresses overlap.
> > What if you use more realistic start addresses?
> I wanted to verify for unaligned address, using malloc() i got the
> memory for the src and dst and I always got aligned address.
Yes, but the three copies you're doing (src+1, src+2, and src+3)
overlap each other.
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