From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sagi Grimberg Subject: Re: RFC: Immediate data support for SRP Date: Tue, 21 Jul 2015 12:25:02 +0300 Message-ID: <55AE0FEE.7060500@dev.mellanox.co.il> References: <55A7CCF1.3080201@sandisk.com> <55ABCB34.1000506@dev.mellanox.co.il> <55ACC2FA.8030202@dev.mellanox.co.il> <55AD133D.2040204@mellanox.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <55AD133D.2040204-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Or Gerlitz , Or Gerlitz Cc: Bart Van Assche , "linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" List-Id: linux-rdma@vger.kernel.org > > So you have 140% better IOPS with immediate-data vs. non immediate > data?! numberz? No, the improvement was to avoid memory copy from the pre-posted recieve buffer (with immediate-data) to an allocated buffer. Instead the receive buffer is handed to the backend to do IO. This shows up to 40% improvement (vs. immediate data with copy on the target side). I'll post numbers with the patches. Sagi. -- 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