Mike Jakubik wrote:
Mark Kirkwood wrote:
Is a minor update to the handbook needed in order avoid confusion
then? e.g. I have been commenting out CPU_I586 on all my PIII systems
in the (mistaken it would seem) belief that having CPU_I686 only was
better.
Agreed, i have always just used I686, assuming it inherited the features
of I586. I think most people will assume this.
A quick benchmark (average of five 'dd' runs sending a large file to
/dev/null using a blocksize of 32k) similar to that suggested by Matt
Dillon (http://www.freebsd.org/projects/ideas/#p-memcpy) shows ~3%
increase with I586_CPU on a dual Pentium III. This was on a lightly
loaded live system, but I think it shows that using I586_CPU on an i686
CPU does show a performance improvement (at least in certain tests).
I have done no testing with blowfish to see how I586_CPU might affect it
as I use AES, but it seems it should be recommended for i686 CPUs as well.
-Jonathan
_______________________________________________
freebsd-stable@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-stable
To unsubscribe, send any mail to "[EMAIL PROTECTED]"
