On Thu, 13 Jan 2005 11:05:45 -0800
Andrew Gillham <gillham@gmail.com> wrote:

> I've seen a very similar problem on my B&W G3.  I dropped
> net.inet.tcp.recvspace to 1024 and it cleared up the performance
> issues locally. (and probably sendspace as well)

I looked at the if_bm.c allocation, and it would only ask for a 4k size.
This puts it within one page, so it seems like it would not experience
this problem.

if_gm.c asks for a much, much larger allocation, but uses the mii
interface.

Offhand, I don't recall which interface your G3 would use. It would be
interesting to see what correlations there are.

tim