Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932566Ab3JONdk (ORCPT ); Tue, 15 Oct 2013 09:33:40 -0400 Received: from one.firstfloor.org ([193.170.194.197]:42982 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932395Ab3JONdj (ORCPT ); Tue, 15 Oct 2013 09:33:39 -0400 Date: Tue, 15 Oct 2013 15:33:36 +0200 From: Andi Kleen To: =?iso-8859-1?Q?S=E9bastien_Dugu=E9?= Cc: Neil Horman , Andi Kleen , linux-kernel@vger.kernel.org, Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org Subject: Re: [PATCH] x86: Run checksumming in parallel accross multiple alu's Message-ID: <20131015133336.GF2592@two.firstfloor.org> References: <1381510298-20572-1-git-send-email-nhorman@tuxdriver.com> <87siw4xy9i.fsf@tassilo.jf.intel.com> <20131014202528.GG26880@hmsreliant.think-freely.org> <20131015091251.2345b918@b012350-ux> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20131015091251.2345b918@b012350-ux> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 531 Lines: 14 > indeed, our typical workload is connected mode IPoIB on mlx4 QDR hardware > where one cannot benefit from hardware offloads. Is this with sendfile? For normal send() the checksum is done in the user copy and for receiving it can be also done during the copy in most cases -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/