svn commit: r266974 - in head/sys: dev/dc dev/fxp dev/mii dev/netmap kern net

[Yonghyeon PYUN]

On Mon, Jun 02, 2014 at 11:42:10AM -0700, Marcel Moolenaar wrote:
> 
> On Jun 2, 2014, at 11:27 AM, Adrian Chadd <adrian at freebsd.org> wrote:
> 
> > .. and actually, bikeshedding for a moment, would we be able to move a
> > lot of these accessor methods over to inlines? Would that break the
> > Juniper way of doing things?
> 
> That would definitely break Juniper as it doesn't give a stable
> ABI.
> 
> I've suggested an approach that allows for both, but it was deemed
> unnecessary. The argument being that the function call overhead is
> negligible.
> 
> We can always revisit that decision if needed...
> 

The function call overheads shall show measurable differences on
slow boxes.  This change adds several function calls in driver's
fast path(interrupt handler, packet statistics, checksum
offloading checking and etc) and these functions would be called
on every TX/RX packet.
It would be great if there is a way to minimize function call
overheads in fast path.