Messages in this thread | | | Date | Sun, 18 Jan 2009 19:28:15 -0800 (PST) | Subject | Re: [PATCH] tcp: splice as many packets as possible at once | From | David Miller <> |
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From: Willy Tarreau <w@1wt.eu> Date: Mon, 19 Jan 2009 01:42:06 +0100
> Hi guys, > > On Thu, Jan 15, 2009 at 03:54:34PM -0800, David Miller wrote: > > From: Willy Tarreau <w@1wt.eu> > > Date: Fri, 16 Jan 2009 00:44:08 +0100 > > > > > 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.
Thanks again.
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