Subject: Re: NewbieQ: NetBSD and drivers
To: Michael Graff <email@example.com>
From: Herb Peyerl <firstname.lastname@example.org>
Date: 01/18/1996 07:55:55
"Michael Graff" <email@example.com> wrote:
> I can reach about 7.9Mbps over a link with only two computers on it.
> This is better than SGI Indys can do. They only get about 7.3Mbps ;)
> The reason for the problem is, of course, the collision. However,
> turning it off isn't right for two reasons.
When I first got the 3c509 driver working reliably, I started doing
performance measurements between two identically configured Dell 4/66's
with 3c509's in them on their own custom piece of coax because I was
sure I'd be able to get more than 400kbps... After some tweaking and
thoughts from Charles/Chris/Theo, I finally got the transfer rate
up to 1010kbps... I didn't think I was going to get much above that so
I stopped there... I did my measurements with 'ttcp'...
In retrospect, I think it would have been good to continue and attempt to
lower the amount of work the cpu did while maintaining that speed. I see
now that the driver gets nowhere near 1000kbps as many other fingers have
been in there fixing various things (not to say they didn't need to be