From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wg0-f44.google.com (mail-wg0-f44.google.com [74.125.82.44]) by dpdk.org (Postfix) with ESMTP id 3FDB33B5 for ; Tue, 16 Dec 2014 09:37:30 +0100 (CET) Received: by mail-wg0-f44.google.com with SMTP id b13so16675698wgh.17 for ; Tue, 16 Dec 2014 00:37:30 -0800 (PST) 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:organization :user-agent:in-reply-to:references:mime-version :content-transfer-encoding:content-type; bh=NX3dpNSfyXRYEFht4K00HZoCVBgisIIZEPz8ZfyYUhM=; b=cO8pp2BKzW2e5fCOPbMegSUOzouNYOGiozZF1c59Nv8dKCFBy4v+XQ73W0XbMkfWKK 7zddg1lWbkLVoFXGc1Is+r/oR0yLzJItPITa9QLhvBKltPmnFq41qC5yj4zlsTZP2UwL rd/ZQb+icb17RNaLqs9Cgd9sk2brbQoICveO+bPiCmauvsqwu3v1zd91BJKdT2CRO4I2 oQ6KiQokBkVKI7GnmLTBuGz96z+81SvIUTrqcU0eCMj15vg1Lw0/1NGpT41OIUpn0cJX rEqBxwu8mcm9m3548pc/3D0m1HatM3bhVeHTlDhcm1arjOZHx4mXHb85zQjNrikBkLbC GkPQ== X-Gm-Message-State: ALoCoQkOmFTuDv2G872jlVE7fCw6/67pa6bdZVtKa2mFPpwB3xkyyWhQCiq/9uJW5iJ0cnkwMs6u X-Received: by 10.180.107.198 with SMTP id he6mr2760230wib.44.1418719050044; Tue, 16 Dec 2014 00:37:30 -0800 (PST) Received: from xps13.localnet (136-92-190-109.dsl.ovh.fr. [109.190.92.136]) by mx.google.com with ESMTPSA id pu3sm229648wjc.14.2014.12.16.00.37.28 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 16 Dec 2014 00:37:29 -0800 (PST) From: Thomas Monjalon To: Helin Zhang Date: Tue, 16 Dec 2014 09:37:04 +0100 Message-ID: <2702920.KlIrzH6BZs@xps13> Organization: 6WIND User-Agent: KMail/4.14.3 (Linux/3.17.4-1-ARCH; KDE/4.14.3; x86_64; ; ) In-Reply-To: <1418718200-31924-1-git-send-email-helin.zhang@intel.com> References: <1418630187-28917-1-git-send-email-helin.zhang@intel.com> <1418718200-31924-1-git-send-email-helin.zhang@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Cc: dev@dpdk.org, aaron.f.rowden@intel.com Subject: Re: [dpdk-dev] [PATCH v3] i40e: workaround for X710 performance issues 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, 16 Dec 2014 08:37:30 -0000 Hi Helin, First, thank you and Jing for the excellent review process. 2014-12-16 16:23, Helin Zhang: > On X710, performance number is far from the expectation on recent > firmware versions. The fix for this issue may not be integrated in > the following firmware version. So the workaround in software driver > is needed. It needs to modify the initial values of 3 internal only > registers. Note that the workaround can be removed when it is fixed > in firmware in the future. I want to understand something here. You say the workaround can be removed when firmware will be fixed. But I suppose that some NICs won't be updated so the workaround will be needed forever? -- Thomas