From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH V1 net-next 1/1] hyperv: Enable sendbuf mechanism on the send path Date: Wed, 30 Apr 2014 13:36:45 -0400 (EDT) Message-ID: <20140430.133645.1431735801141049226.davem@davemloft.net> References: <1398878071-21307-1-git-send-email-kys@microsoft.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: olaf@aepfle.de, netdev@vger.kernel.org, jasowang@redhat.com, linux-kernel@vger.kernel.org, apw@canonical.com, devel@linuxdriverproject.org To: kys@microsoft.com Return-path: In-Reply-To: <1398878071-21307-1-git-send-email-kys@microsoft.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: driverdev-devel-bounces@linuxdriverproject.org List-Id: netdev.vger.kernel.org From: "K. Y. Srinivasan" Date: Wed, 30 Apr 2014 10:14:31 -0700 > We send packets using a copy-free mechanism (this is the Guest to Host transport > via VMBUS). While this is obviously optimal for large packets, > it may not be optimal for small packets. Hyper-V host supports > a second mechanism for sending packets that is "copy based". We implement that > mechanism in this patch. > > In this version of the patch I have addressed a comment from David Miller. > > With this patch (and all of the other offload and VRSS patches), we are now able > to almost saturate a 10G interface between Linux VMs on Hyper-V > on different hosts - close to 9 Gbps as measured via iperf. > > Signed-off-by: K. Y. Srinivasan > Reviewed-by: Haiyang Zhang Applied.