On Wed, 11 Jul 2001, Leo Bicknell wrote:
>
> I'm going to bring up a topic that is sure to spark a great debate
> (read: flamefest), but I think it's an important issue. I've put
> my nomex on, let's see where this goes.
I don't think this will start a flamefest; most of what you suggest is
definitely needed. However, the main question is one of developer time.
Bosko just rewrote the mbuf subsystem in -current, making memory
reclamation more feasible. However, I doubt much of this will be material
that can be ported back to 4.x.
You seem to have hit at the crux of the problem - we need dynamically
tuned socket buffers. I think that there are patches which implement that
feature for netbsd, perhaps they can be ported over. If you (or anyone
else with free time) would port that code, I don't think it would see
barriers to inclusion. <hint hint>
As for changing the default buffer sizes and mbuf to mbuf cluster ratio...
that could certainly spark long debate. In general, I agree with your
suggestions. However, let's cut the debate short. Since you have a bunch
of fbsd servers you can check out, track the output of netstat -m over the
course of a few days on them. From this data, the answer to the ratio
question should become clear.
Mike "Silby" Silbersack
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