From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <dev-bounces@dpdk.org>
Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124])
	by inbox.dpdk.org (Postfix) with ESMTP id 7999545C16;
	Wed, 30 Oct 2024 17:26:16 +0100 (CET)
Received: from mails.dpdk.org (localhost [127.0.0.1])
	by mails.dpdk.org (Postfix) with ESMTP id 6A84C4343A;
	Wed, 30 Oct 2024 17:26:16 +0100 (CET)
Received: from dkmailrelay1.smartsharesystems.com
 (smartserver.smartsharesystems.com [77.243.40.215])
 by mails.dpdk.org (Postfix) with ESMTP id 8EA7540299
 for <dev@dpdk.org>; Wed, 30 Oct 2024 17:26:15 +0100 (CET)
Received: from smartserver.smartsharesystems.com
 (smartserver.smartsharesys.local [192.168.4.10])
 by dkmailrelay1.smartsharesystems.com (Postfix) with ESMTP id 5AD9621B11;
 Wed, 30 Oct 2024 17:26:15 +0100 (CET)
Content-class: urn:content-classes:message
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
Subject: RE: [PATCH v3 1/2] net/ixgbe: increase the maximum of RX/TX
 descriptors
Date: Wed, 30 Oct 2024 17:26:12 +0100
Message-ID: <98CBD80474FA8B44BF855DF32C47DC35E9F854@smartserver.smartshare.dk>
X-MimeOLE: Produced By Microsoft Exchange V6.5
In-Reply-To: <20241030154256.379249-2-sismis@cesnet.cz>
X-MS-Has-Attach: 
X-MS-TNEF-Correlator: 
Thread-Topic: [PATCH v3 1/2] net/ixgbe: increase the maximum of RX/TX
 descriptors
Thread-Index: Adsq4mufVxYKvOnWTCqxmwTGmSRXzgABXiXQ
References: <20241029124832.224112-1-sismis@cesnet.cz>
 <20241030154256.379249-1-sismis@cesnet.cz>
 <20241030154256.379249-2-sismis@cesnet.cz>
From: =?iso-8859-1?Q?Morten_Br=F8rup?= <mb@smartsharesystems.com>
To: "Lukas Sismis" <sismis@cesnet.cz>,
	<dev@dpdk.org>
Cc: <stephen@networkplumber.org>, <anatoly.burakov@intel.com>,
 <ian.stokes@intel.com>, "Bruce Richardson" <bruce.richardson@intel.com>
X-BeenThere: dev@dpdk.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <https://mails.dpdk.org/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://mails.dpdk.org/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <https://mails.dpdk.org/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
Errors-To: dev-bounces@dpdk.org

> From: Lukas Sismis [mailto:sismis@cesnet.cz]
> Sent: Wednesday, 30 October 2024 16.43
>=20
> Intel PMDs are capped by default to only 4096 RX/TX descriptors.
> This can be limiting for applications requiring a bigger buffer
> capabilities. By bufferring more packets with RX/TX
> descriptors, the applications can better handle the processing
> peaks.
>=20
> Setting ixgbe max descriptors to 8192 as per datasheet:
> Register name: RDLEN
> Description: Descriptor Ring Length.
> This register sets the number of bytes
> allocated for descriptors in the circular descriptor buffer.
> It must be 128B aligned (7 LS bit must be set to zero).
> ** Note: validated Lengths up to 128K (8K descriptors). **
>=20
> Signed-off-by: Lukas Sismis <sismis@cesnet.cz>
> ---

Drivers should reflect hardware capabilities; it's not up to the driver =
to impose artificial limits on applications. Thank you for fixing this, =
Lukas.

Acked-by: Morten Br=F8rup <mb@smartsharesystems.com>