From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: RE: [PATCH 2/2] IB/ipoib: fix GRO merge failure for IPoIB originated TCP streams Date: Fri, 03 Feb 2012 10:00:40 +0100 Message-ID: <1328259640.2480.43.camel@edumazet-laptop> References: <1828884A29C6694DAF28B7E6B8A823733349A5D2@ORSMSX101.amr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Or Gerlitz , linux-rdma , Shlomo Pongratz , Roland Dreier , "netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , Herbert Xu To: "Hefty, Sean" Return-path: In-Reply-To: <1828884A29C6694DAF28B7E6B8A823733349A5D2-P5GAC/sN6hmkrb+BlOpmy7fspsVTdybXVpNB7YpNyf8@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: netdev.vger.kernel.org Le vendredi 03 f=C3=A9vrier 2012 =C3=A0 07:18 +0000, Hefty, Sean a =C3=A9= crit : > > Hi Sean, this is the patch posted earlier by Eric enhanced to > > have IPoIB to set gro_mac_header_len to the ipoib header len, does > > it make things to work okay for you? >=20 > I ran a quick test. It helps some, but the performance for streaming= packets in one direction is still only 0.11 Gbps. It should be closer= to 10-15 Gbps for ipoib on my systems. >=20 > - Sean Hmm... a tcpdump would help to understand what is going on (for example if GRO kicks in) -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" i= n the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html