From mboxrd@z Thu Jan  1 00:00:00 1970
From: Cyril Chemparathy <cchemparathy@ezchip.com>
Subject: Re: mempool with custom alignment
Date: Wed, 3 Jun 2015 11:36:30 -0700
Message-ID: <20150603113630.06cc7b8c@cchemparathy-ubuntu>
References: <CAD6B5uUNqiD18LJQXDaA9FaOhJTepjF4woZFTM34R6FjSPLxEw@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="US-ASCII"
Content-Transfer-Encoding: 7bit
Cc: dev@dpdk.org
To: Dax Rawal <daxayrawal@gmail.com>
Return-path: <dev-bounces@dpdk.org>
Received: from emea01-db3-obe.outbound.protection.outlook.com
 (mail-db3on0090.outbound.protection.outlook.com [157.55.234.90])
 by dpdk.org (Postfix) with ESMTP id 1941D4A63
 for <dev@dpdk.org>; Wed,  3 Jun 2015 20:36:52 +0200 (CEST)
In-Reply-To: <CAD6B5uUNqiD18LJQXDaA9FaOhJTepjF4woZFTM34R6FjSPLxEw@mail.gmail.com>
List-Id: patches and discussions about DPDK <dev.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
Errors-To: dev-bounces@dpdk.org
Sender: "dev" <dev-bounces@dpdk.org>

On Wed, 3 Jun 2015 11:30:17 -0700
Hi Dax,

Dax Rawal <daxayrawal@gmail.com> wrote:

> Hi,
> I use mempool APIs to allocate DMA-able descriptor ring and buffers
> so that I get both physical and virtual addresses of allocated
> memory. I buffers I get from the mempool APIs are 64 byte aligned. My
> requirement is 256byte alignment. How to achieve this? mempool APIs
> do not seem to take alignment parameters.
> 

I have a patch that allows configuration override of mempool element
alignment to allow for larger alignment limits (e.g. 128B on the
TILE-Gx platform, 256B on yours). Would that suffice? If so, I'd be
happy to post this patch on the mailing list.

Thanks
-- Cyril.