Re: systimer01.patch available for review.

[David Cuthbert <dacut@xxxxxxxxx>]

Matthew Dillon wrote:
>     Well, I don't think we want to put everything in .s files... that
>     would create serious performance issues for things like inb() and
>     outb(), btrl(), etc.

For a datapoint: NT's HAL implements in*() and out*() (well,
READ_PORT_UXXXX and WRITE_PORT_UXXXX) as out-of-line functions on x86;
the rationale, I believe, is that I/O operations take far longer than
the call itself.

On Alpha, though, they were in-line, presumably because it didn't have a
separate I/O space.