lkml.org 
[lkml]   [2009]   [Jan]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    SubjectRe: [PATCH] tcp: splice as many packets as possible at once
    From
    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.


    \
     
     \ /
      Last update: 2009-01-19 04:31    [W:0.021 / U:0.736 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site