On Sun, Jan 18, 2009 at 07:28:15PM -0800, David Miller wrote:

From: Willy Tarreau <w@1wt.eu>
Date: Mon, 19 Jan 2009 01:42:06 +0100

quoted

Hi guys,

On Thu, Jan 15, 2009 at 03:54:34PM -0800, David Miller wrote:

quoted

From: Willy Tarreau <w@1wt.eu>
Date: Fri, 16 Jan 2009 00:44:08 +0100

quoted

And BTW feel free to add my Tested-by if you want in case you merge
this fix.

Done, thanks Willy.

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)

  - 9.2 Gbps at 50% CPU using MTU=1500 with LRO

  - 10 Gbps at 20% CPU using MTU=9000 without LRO (7 Gbps at 100% CPU without
    splice)

  - 10 Gbps at 15% CPU using MTU=9000 with LRO

Thanks for the numbers.

We can almost certainly do a lot better, so if you have the time and
can get some oprofile dumps for these various cases that would be
useful to us.

No problem, of course. It's just a matter of time, but if we can push
the numbers further, let's try.

Regards,
Willy