From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40212) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZVFRc-0005e9-Ca for qemu-devel@nongnu.org; Fri, 28 Aug 2015 04:55:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZVFRX-0002a9-22 for qemu-devel@nongnu.org; Fri, 28 Aug 2015 04:55:32 -0400 Received: from mga14.intel.com ([192.55.52.115]:27068) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZVFRW-0002Zw-Tc for qemu-devel@nongnu.org; Fri, 28 Aug 2015 04:55:26 -0400 From: Liang Li Date: Fri, 28 Aug 2015 16:54:11 +0800 Message-Id: <1440752053-16961-1-git-send-email-liang.z.li@intel.com> Subject: [Qemu-devel] [PATCH 0/2] Optimization with AVX2 instruction List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: amit.shah@redhat.com, pbonzini@redhat.com, yang.z.zhang@intel.com, Liang Li , quintela@redhat.com The buffer_find_nonzero_offset() will be called to check the zero page during live migration, it's a hot function. buffer_find_nonzero_offset() has already been optimized with SSE2 instructions, for platform that supports AVX2, we can optimize this function with AVX2 instructions and achieve about 25% performance gain. Liang Li (2): cutils: add the AVX2 optimization configure: add --enable-avx2 option configure | 16 ++++++++++++++++ include/qemu-common.h | 7 +++++++ 2 files changed, 23 insertions(+) -- 1.9.1