On Sat, 26 Nov 2005 13:14:31 -0500
Timothy Miller <[EMAIL PROTECTED]> wrote:
> The first thing we can do is carefull tune the DMA command packet set.
> There are, of course, limitations on this, because we need to keep
> the hardware simple, but there are likely many things we can do to
> squeeze out a little more performance. For instance, X and Y
> coordinates are usually 16 bits, but sometimes, we don't need numbers
> that big. In those cases, we can use the extra bits to squeeze in
> some other parameter(s). The same is true for absolute addresses.
Just a little note here: Please avoid such stuffings unless
there is really an advantage in using them. Because with
every different DMA command packet format you make the life
for a driver writer harder and it makes the code harder to
understand and thus harder to maintain.
I know, hardware should here command what sofware should
do, but we should optimize over both sides.
Attila Kinali
--
wer soviel schoggi isst, kann sowieso nicht dumm sein ;-)
-- Sandra
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