From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-f47.google.com (mail-lf0-f47.google.com [209.85.215.47]) by dpdk.org (Postfix) with ESMTP id ECA762BA6 for ; Mon, 10 Oct 2016 16:25:43 +0200 (CEST) Received: by mail-lf0-f47.google.com with SMTP id b81so128203550lfe.1 for ; Mon, 10 Oct 2016 07:25:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=6wind-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:user-agent:in-reply-to :references:mime-version:content-transfer-encoding; bh=ug93bTcs8dT29E91aAyqatkQ47/vRw/svo795NbhQJs=; b=TNKqM2IDRVEAeXAKyOjZgOlxmOo6+5a9uv7tnIzQIm9crxTvxHgcLV003aCeWQJAIW k4VUlXD7FXuATz6tBLDMgiFVK8H/2kzQsnR6GUP2M3NyaNSCfLMGrKE+Zg9SvjK37LbM 8MpOSMmm2Y9uRDyska72gD15Y2FrgMtYZCIQYXWhtbQsZTvaGXEInkoSh7twS4/nFXnN URyD2ltU8KbgnBnftfwkZFm0eBzEBL8nNoteOefUbRYQgjA9vNHTLsvIOJJHgRiV98r9 Ug6DKGMt9VVbCRJbAH23Oi2iVs7y3+Bebl9LqtrGoJdMBQyeM7xW9KppD3YrdXZ8rsmW S9Vg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:user-agent :in-reply-to:references:mime-version:content-transfer-encoding; bh=ug93bTcs8dT29E91aAyqatkQ47/vRw/svo795NbhQJs=; b=W0PSDqdtgA9Rnq3E9H09ITtwLqVbTSzVHVHDf1X8IaLoUA9lkRa3ykw9nddxSei4eJ OlrUBiTHL/EwTef03L9SwgK8cFwZS4HGFWL7pbEB0/yCoVnW4/NwgLvtsMgsoxdzMNa/ ldKlMHxoXCMp+80s0+NgPL1iJ/k8ns0Oyq0BV0fuMx6NxRgVAl7+i92c0XLcI+olu0u7 pkBYGmtDZkNvu32DqXOYpOsZYP6yS3j2DSRnlK2++RAp5ZJLWA97Wzq9PBeD9KFHwlTH E0vw2/bapytDSdCjrY67hqUgO6t2TgbcNVMGsxKdqI+9HiMDdsZkUl8EV4OoeTosa9V2 o4jA== X-Gm-Message-State: AA6/9Rllts4BRmly9izODO2SAVFitPix+OKmLE9peMFCqRfdG0R4ESv06FEMzvc2ySGsIcjS X-Received: by 10.25.29.1 with SMTP id d1mr4086461lfd.121.1476109542598; Mon, 10 Oct 2016 07:25:42 -0700 (PDT) Received: from xps13.localnet (184.203.134.77.rev.sfr.net. [77.134.203.184]) by smtp.gmail.com with ESMTPSA id w65sm6275375lff.16.2016.10.10.07.25.41 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 10 Oct 2016 07:25:41 -0700 (PDT) From: Thomas Monjalon To: "Liu, Yong" , reshma.pattan@intel.com Cc: dev@dpdk.org Date: Mon, 10 Oct 2016 16:25:40 +0200 Message-ID: <2578548.bj2dOLfXoi@xps13> User-Agent: KMail/4.14.10 (Linux/4.5.4-1-ARCH; KDE/4.14.11; x86_64; ; ) In-Reply-To: <57EB30E0.30106@intel.com> References: <57EB30E0.30106@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Subject: Re: [dpdk-dev] [PATCH v2] mk: gcc -march support for intel processors code names 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: Mon, 10 Oct 2016 14:25:44 -0000 2016-09-28 10:54, Liu, Yong: > Tested-by: Yong Liu > FangFang Wei [...] > Description: Build test on different distributions > Command / instruction: > Verify build pass on listed distributions. > > OS GCC Kernel > Ubuntu 16.04 5.4.0 4.4.0-36-generic > Fedora23 5.3.1 4.2.3-300 > Fedora24 6.1.1 4.6.4-301 > Ubuntu 12.04 4.6.3 3.8.0-29 > Ubuntu 12.04 i686 4.6.3 3.8.0-29 > Ubuntu 14.04 4.8.4 3.16.0-30 > Ubuntu 14.04 i686 4.8.4 3.16.0-30 > Fedora18 4.7.2 3.6.10-4 > Fedora18 i686 4.7.2 3.6.10-4 > Fedora20 4.8.2 3.15.6-200 > Fedora20 i686 4.8.3 3.11.0 > Suse11SP2 4.5.1 3.0.13-0.2 > Suse12SP3 4.7.2 3.7.10-1.1 > RHEL7.0 4.8.2 3.10.0-123 > RHEL7.2 4.8.5 3.10.0-327 > CentOS7.0 4.8.5 3.10.0-327 > FreeBSD10.0 4.8.4 10.0-RELEASE > FreeBSD10.3 4.8.5 10.3-RELEASE I do not understand this test. This patch is dropping a lot of optimizations with compilers older than 4.9 ! Why not recommend GCC 4.9 and keep the graceful degradation for older versions, at least for one more year, even if it is not optimal for newer architectures?