On Thu, 17 Feb 2005 06:59:06 +0800
"HiNet" <[EMAIL PROTECTED]> wrote:
> Sorry, you are right. Today's hardware should support scatter/gather
> mode. I guess maybe this may be user space drivers can't have
> hardware interrupt handler,
It's theoreticaly possible, but none of the OS i know implements
this.
> and they just do polling.(But in
> nvidia and ATI's case, they have kernel part driver must be loaded
> before startx). Or maybe there must be some extra memory copy
> in X.
What do you mean by extra memcpy ?
Yes Xv has an extra memcpy compared to direct access methods
like mga_vid or vidix. But it's necessary in this case, thus
i wouldnt say it's "extra".
> And I really don't know the actual reason for this. This really
> happens obviously when you use PIII or PII machines.
> And I am quite sure that is not the "fault" of user programs but X.
IO-Bandwith limit.
Attila Kinali
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