Re: [PATCH] tcp: splice as many packets as possible at once

Herbert Xu
2009-01-19T03:09:34Z

On Mon, Jan 19, 2009 at 01:42:06AM +0100, Willy Tarreau wrote:
>
> Just for the record, I've now re-integrated those changes in a test kernel
> that I booted on my 10gig machines. I have updated my user-space code in
> haproxy to run a new series of tests. Eventhough there is a memcpy(), the
> results are EXCELLENT (on a C2D 2.66 GHz using Myricom's Myri10GE NICs) :
>
> - 4.8 Gbps at 100% CPU using MTU=1500 without LRO
> (3.2 Gbps at 100% CPU without splice)

One thing to note is that Myricom's driver probably uses page
frags which means that you're not actually triggering the copy.

Cheers,
--
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt