Thanks Walter. That description verifies my guess and gives me a reason to continue looking at the issue.
I appreciate your help. Cheers, Mark On 9/3/05, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > On Wed, Aug 31, 2005 at 09:04:21AM -0700, Mark Knecht wrote > > > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge > > mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid > > xtpr > [...deletia...] > > I then looked for CPU flags that had an equivalent USE flag and that > > might be of use for faster graphics. On this machine I chose mmx, sse > > & sse2. Armed with that I changed my make.conf file to look like this: > > There are CPU flags and there are USE flags. Some of them have the > same names, and that may confuse you. It works like this... > 1) Get a listing of your cpu's flags in /proc/cpuinfo > 2) Check against the list of supported flags in gcc for you cpu, and > add them to CFLAGS > 3) Check http://www.gentoo.org/dyn/use-index.xml for a list of valid > USE flags, and include any that show up in /proc/cpuinfo > 4) Repeat step 3) with /usr/portage/profiles/use.local.desc for any > programs you're emerging. There doesn't seem to be anything > special on your pentium4, but my AMD64 not only has mmx and 3dnow, > it also has mmxext and 3dnowext. mplayer can take advantage of > them. I include them in the /etc/portage/package.use entry for > media-video/mplayer. > > I'll assume that you're using gcc 3.3.5. In that case, the place to > look for CPU flag options is... > > http://gcc.gnu.org/onlinedocs/gcc-3.3.5/gcc/i386-and-x86_002d64-Options.html#i386-and-x86_002d64-Options > > That list shows pentium4, mmx, sse, and sse2. Also, if you have *ANY* > version of sse available, you can improve performance by running floating > point math via sse, rather than 387 instructions. I recommend... > > CFLAGS="-O2 -pipe -fomit-frame-pointer -march=pentium4 -mmmx -msse -msse2 > -mfpmath=sse" > > http://www.gentoo.org/dyn/use-index.xml shows mmx and sse as valid USE > flags, so you can include them in USE. > > -- > Walter Dnes <[EMAIL PROTECTED]> > My musings on technology and security at http://tech_sec.blog.ca > -- > gentoo-user@gentoo.org mailing list > > -- gentoo-user@gentoo.org mailing list
