Followup to: <[email protected]>
By author: Robert Hancock <[email protected]>
In newsgroup: linux.dev.kernel
> >
> > Note that there isn't any code for moving dwords because the
> > chances of gaining anything are slim (alignment may hurt).
>
> I'd say the chances of gaining something from executing half as many
> instructions on copying a large block of memory are very good indeed..
>
For something that generates I/O transactions, it's imperative to
generate the smallest possible number of transactions. Furthermore,
smaller than dword transactions aren't burstable, except at the
beginning and end of a burst.
-hpa
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