From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pradeep Satyanarayana Subject: Re: rsockets and other performance Date: Sun, 17 Jun 2012 14:20:39 -0700 Message-ID: <4FDE4A27.5080601@linux.vnet.ibm.com> References: <4FDA0233.6090409@linux.vnet.ibm.com> <1339690194.14317.5.camel@oc1677441337.ibm.com> <4FDD85B3.2090406@mellanox.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4FDD85B3.2090406-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Or Gerlitz Cc: Sridhar Samudrala , "Hefty, Sean" , "linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , kashyapv-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org, Shlomo Pongratz List-Id: linux-rdma@vger.kernel.org On 06/17/2012 12:22 AM, Or Gerlitz wrote: > On 6/14/2012 7:09 PM, Sridhar Samudrala wrote: >> Enabling NETIF_F_SG improves the throughput further by avoiding a >> additional kernel memcpy caused by skb_linearize() in dev_queue_xmit(). > > Hi Sridhar, > > If you **only** enable NETIF_F_SG for CM, does this yields any gain? > did you had to patch the code for that end? > Hi Or, We did not try only NETIF_F_SG for IPoIB CM. We tried it along with NETIF_F_IP_CSUM. We did run into issues with netperf i.e. netperf errors out along with NETIF_F_SG. However, iperf worked fine. Did not investigate that further. Thanks Pradeep -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html