From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Hefty, Sean" Subject: RE: Slow performance with librspreload.so Date: Wed, 28 Aug 2013 15:50:07 +0000 Message-ID: <1828884A29C6694DAF28B7E6B8A8237388CA937E@ORSMSX109.amr.corp.intel.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT Return-path: In-Reply-To: Content-Language: en-US Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: 'Gandalf Corvotempesta' , "'linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org'" List-Id: linux-rdma@vger.kernel.org > i've connected just one port between two hosts. > Ports is detected properly as 20Gb/s (4x DDR) but i'm unable to reach > speed over 5Gbit/s: It's possible that this is falling back to using normal TCP sockets. Can you run the rstream test program to verify that you can get faster than 5 Gbps? rstream without any options will use rsockets directly. If you use the -T s option, it will use standard TCP sockets. You can use LD_PRELOAD with -T s to verify that the preload brings your per performance to the same level as using rsockets directly. - Sean -- 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