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Re: zerocopy results on GigE

To: Pekka Pietikainen <pp@xxxxxxxxxxxxxx>
Subject: Re: zerocopy results on GigE
From: Ben Greear <bgreear@xxxxxxxxxxxxxxxxx>
Date: Tue, 06 Feb 2001 11:36:01 -0700
Cc: netdev@xxxxxxxxxxx
References: <20010206194919.A633@netppl.fi>
Sender: owner-netdev@xxxxxxxxxxx
Pekka Pietikainen wrote:
> 
> Here's some benchmarks I ran today, which look quite similar to what
> Jamal was getting.
> 
> Jumbo frames, sender is dual pIII/500 with 32/66 PCI, receiver a dual pII/450
> with 32/33, both have 1MB Alteons. CPU use is measured using cyclesoak.
> SO_RCVBUF/SO_SNDBUF set to 512k, no other sockopts touched.
> 
> I did the tests with a nice little modular network tester I've been
> hacking on, ttcp/gensink give similar results...

I assume this copies (at least logically) the data to/from user-space?

If so, would routing numbers be even better, with regard to throughput?

For instance, does anyone have any numbers on routing between two GigE
interfaces??

Also, what does MSG_TRUNC do??  It seems to have a serious affect on traffic!

THanks,
Ben

-- 
Ben Greear (bgreear@xxxxxxxxxxxxxxxxx)   http://www.mayannetworks.com
NAM Team, Phoenix                        http://www-internal/~bgreear
Phone: 602-325-2043                 Personal Cell Phone: 602-502-6887

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