Cached file read performance
Alexander at Leidinger.net
Fri Dec 22 12:22:30 PST 2006
Quoting Bruce Evans <bde at zeta.org.au> (Fri, 22 Dec 2006 23:37:53 +1100 (EST)):
> On Fri, 22 Dec 2006, Adrian Chadd wrote:
> > On 22/12/06, David Xu <davidxu at freebsd.org> wrote:
> >> I suspect in such a test, memory copying speed will be a key factor,
> >> I don't have number to back up my idea, but I think Linux has lots
> >> of tweaks, such as using MMX instruction to copy data.
> > I had the oppertunity to study the AMD Athlon XP Optimisation guide
> > and noted their example copy routine, optimised for the chipset, was
> > quite a hell of a lot faster over a straight block copy.
> > Has anyone here done any similar modifications to optimise
> > copyin/copyout? I can't imagine it'd be a bad thing to have.
> Sure. It's a larger win mainly in benchmarks. It's a twisty MD maze.
I want to point out http://www.freebsd.org/projects/ideas/#p-memcpy
here. Just in case someone wants to play around a little bit.
I like your SNOOPY POSTER!!
http://www.Leidinger.net Alexander @ Leidinger.net: PGP ID = B0063FE7
http://www.FreeBSD.org netchild @ FreeBSD.org : PGP ID = 72077137
More information about the freebsd-performance