*nix performance

[Keith Ericson]

In article <2733 at ima.ima.isc.com> johnl at ima.UUCP (John R. Levine) writes:
>
>On machines with a PC AT bus DMA is rarely a win. It takes so long to get and
>release the bus that it's faster to...

Corroboration:

We use Micom-Interlan NI5010 network interface boards around here.
Their instructions indicate NOT to use DMA on an AT-class machine
because a tight loop doing the data transfers is faster than the
AT's DMA...

keith