[mythtv] [patch] mythtv-HOWTO-5.html - compiling for different processors

Isaac Richards ijr at case.edu
Tue Dec 28 22:45:14 UTC 2004


On Tuesday 28 December 2004 03:46 pm, Daniel Thor Kristjansson wrote:
> On Tue, 28 Dec 2004, Isaac Richards wrote:
> ]Won't be applied.  Anything but the default compile settings (with the
> ]exception of different arches) is unsupported.
>
> This patch removes the -mfpmath=sse performance recommendation, but
> keeps the additional archs, such as the winchip, the updated C3 info,
> and other Intel and AMD processors.

Have you profiled on each of those processors to see if setting the arch 
actually creates faster code?  I've seen -march=athlon-xp create 50% slower 
code than -march=pentiumpro with a recent gcc..

Isaac


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