On 30 Oct 1999, Marcus Sundberg wrote:
> "Jon M. Taylor" <[EMAIL PROTECTED]> writes:
>
> > On Fri, 29 Oct 1999, Per Wigren wrote:
> > > and GGI using
> > > fbdev as a target is much slower than KGI.
> >
> > Basic fbdev drivers are unaccelerated, so this is true. However,
> > KGIcon drivers are able to handle kgicommand ioctls through the fbdev
> > interface, and as such can be fully accelerated.
>
> Note however that the direct acceleration you get using matroxfb
> is 4-6 times faster that the ioctl() based acceleration of the Matrox
> KGIcon driver. On a related note - direct acceleration using KGIcon
> is also about 50% slower than direct acceleration using matroxfb,
> so something must be broken with our mmap() handler.
>
Could it be, that there is a additional Software-Layer in kgicon?
Wrappers are usually slow, if a additional Software-Layer is used.
Christoph Egger
E-Mail: [EMAIL PROTECTED]
