Quoting Bruce Evans <[EMAIL PROTECTED]> (Fri, 22 Dec 2006 23:37:53 +1100 (EST)):
> On Fri, 22 Dec 2006, Adrian Chadd wrote: > > > On 22/12/06, David Xu <[EMAIL PROTECTED]> 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. Bye, Alexander. -- 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 _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "[EMAIL PROTECTED]"
