Subject: indirect calls [Re: issues with com and non-PCI platforms.... a proposal]
To: None <tech-kern@netbsd.org>
From: Pavel Cahyna <pavel.cahyna@st.mff.cuni.cz>
List: tech-kern
Date: 03/14/2006 21:10:33
On Wed, Mar 08, 2006 at 04:30:35PM -0800, Matt Thomas wrote:
>
> On Mar 8, 2006, at 3:59 PM, Garrett D'Amore wrote:
> >How does an indirect function call compare against say the cost of
> >another array index lookup and an extra shift/mask operation>
>
> for vax, about an order of magnitude.
What can be so slow? An indirect function call, or function calls in
general? And which architectures especially suffer from expensive indirect
function calls?
Pavel Cahyna