From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp.tuxdriver.com (charlotte.tuxdriver.com [70.61.120.58]) by dpdk.org (Postfix) with ESMTP id D002E5A55 for ; Tue, 17 Feb 2015 14:01:43 +0100 (CET) Received: from [67.210.173.2] (helo=localhost) by smtp.tuxdriver.com with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.63) (envelope-from ) id 1YNhmT-0001fV-Mq; Tue, 17 Feb 2015 08:01:42 -0500 Date: Tue, 17 Feb 2015 08:01:31 -0500 From: Neil Horman To: Vithal S Mohare Message-ID: <20150217130131.GA2729@neilslaptop.think-freely.org> References: <98DB008FA2AC6644B40AD8C766FAB271020CA67F5E@BOREAL.arubanetworks.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <98DB008FA2AC6644B40AD8C766FAB271020CA67F5E@BOREAL.arubanetworks.com> User-Agent: Mutt/1.5.23 (2014-03-12) X-Spam-Score: -2.9 (--) X-Spam-Status: No Cc: "dev@dpdk.org" Subject: Re: [dpdk-dev] rte_memcpy optimization patch to dpdk ver 1.7 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 17 Feb 2015 13:01:44 -0000 On Tue, Feb 17, 2015 at 08:39:22AM +0000, Vithal S Mohare wrote: > Hi, > > I am trying to use rte_memcpy optimization patch along with dpdk version 1.7. With the patch, while dpdk itself is compiled, applications failed with below error: > ------------------------------- > include/rte_memcpy.h:629:2: error: implicit declaration of function '_mm_alignr_epi8' [-Werror=implicit-function-declaration] > /home/vithals/adu_src/build/x-men_dev/Default/shumway/infra/dpdk/shumway_obj/lib/../include/rte_memcpy.h:629:2: error: incompatible type for argument 2 of '_mm_storeu_si128' > ------------------------------- > > After including -mssse3 flags, compilation (cross compiled for a x86 linux based platform) went through. Now the question is, when this binary is loaded on system that doesn't support SSSE3 instruction set (but just sse2 etc), what would be the behavior? > A crash. You'll attempt to send an unknown binary instruction into the execution pipeline and the processor will fault. Neil