Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754268AbaDNNbS (ORCPT ); Mon, 14 Apr 2014 09:31:18 -0400 Received: from mail-qg0-f41.google.com ([209.85.192.41]:56412 "EHLO mail-qg0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751818AbaDNNbR (ORCPT ); Mon, 14 Apr 2014 09:31:17 -0400 MIME-Version: 1.0 In-Reply-To: <20140413220334.GE22728@two.firstfloor.org> References: <1396882237-27608-1-git-send-email-ling.ma@alipay.com> <877g71jdl8.fsf@tassilo.jf.intel.com> <20140413220334.GE22728@two.firstfloor.org> Date: Mon, 14 Apr 2014 21:31:16 +0800 Message-ID: Subject: Re: [PATCH RFC] x86:Improve memset with general 64bit instruction From: Ling Ma To: Andi Kleen Cc: mingo@redhat.com, tglx@linutronix.de, hpa@zytor.com, neleai@seznam.cz, linux-kernel@vger.kernel.org, Ling Ma Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The kernel version 3.14 shows memcpy, memset occur 19622 and 14189 times respectively. so memset is still important for us, correct? Thanks Ling 2014-04-14 6:03 GMT+08:00, Andi Kleen : > On Sun, Apr 13, 2014 at 11:11:59PM +0800, Ling Ma wrote: >> Any further comments ? > > It would be good to test on some more machines that you don't cause > regressions. > > But I'm not aware of any workload that is doing a lot of memset (not > counting clear_page). Copies likely matter much more. > > -Andi > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/