Re: PCI-SCI Drivers v1.1-7 released

From: Jeff V. Merkey (
Date: Wed Feb 07 2001 - 15:03:41 EST

On Wed, Feb 07, 2001 at 07:06:55PM +0000, Alan Cox wrote:
> > I looked into this, and discovered that the gcc 2.96 compiler turned my
> > rep movsd code into a rep movsb (???) with some evil looking C++ style
> If its hand coded asm then gcc shouldnt have touched it. If its an implicit
> memcpy then gcc will generate inline code designed for main memory copying.
> Do you have a small example chunk of code showing this ?
> > They deviated by 30%, indicating that my MTRR write combining optimization
> > was not working properly in sci copy mode.
> That would explain the %age certainly. How it happened is the next question

I'll gen some code, and send to you.



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