From mboxrd@z Thu Jan  1 00:00:00 1970
From: Bruce Richardson <bruce.richardson@intel.com>
Subject: Re: [PATCH] test/mempool: decrease size of requested
 mempool
Date: Thu, 9 Jul 2015 12:18:31 +0100
Message-ID: <20150709111831.GE8408@bricha3-MOBL3>
References: <1436432489-31161-1-git-send-email-olivier.matz@6wind.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Cc: dev@dpdk.org
To: Olivier Matz <olivier.matz@6wind.com>
Return-path: <dev-bounces@dpdk.org>
Received: from mga14.intel.com (mga14.intel.com [192.55.52.115])
 by dpdk.org (Postfix) with ESMTP id BC518952
 for <dev@dpdk.org>; Thu,  9 Jul 2015 13:18:35 +0200 (CEST)
Content-Disposition: inline
In-Reply-To: <1436432489-31161-1-git-send-email-olivier.matz@6wind.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 Thu, Jul 09, 2015 at 11:01:29AM +0200, Olivier Matz wrote:
> In test application, the default size of allocated mempool is calculated
> as following:
> 
>   (RTE_MAX_LCORE * (RTE_MEMPOOL_CACHE_MAX_SIZE + max_kept_objects)) - 1
> 
> The objective is to ensure that all cores can fill their cache and keep
> 'max_kept_objects' at the same time. As RTE_MAX_LCORE is 128 and
> RTE_MEMPOOL_CACHE_MAX_SIZE is 512 in the default configuration, it can
> produce very large mempools (170 MB).
> 
> We can replace the number of core by a dynamic value, which drastically
> reduces the amount of memory needed for this test (5 MB with 4 cores).
> 
> Signed-off-by: Olivier Matz <olivier.matz@6wind.com>

Acked-by: Bruce Richardson <bruce.richardson@intel.com>