Messages in this thread | | | Date | Mon, 19 Jan 2009 07:11:21 +0100 | From | Willy Tarreau <> | Subject | Re: [PATCH] tcp: splice as many packets as possible at once |
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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 > > > 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.
No problem, of course. It's just a matter of time, but if we can push the numbers further, let's try.
Regards, Willy
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