Message ID | 1585851108-485-1-git-send-email-akozyrev@mellanox.com (mailing list archive) |
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Headers |
Return-Path: <dev-bounces@dpdk.org> X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 8E936A0562; Thu, 2 Apr 2020 20:11:52 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 368522BCE; Thu, 2 Apr 2020 20:11:52 +0200 (CEST) Received: from mellanox.co.il (mail-il-dmz.mellanox.com [193.47.165.129]) by dpdk.org (Postfix) with ESMTP id CFD8D2BCE for <dev@dpdk.org>; Thu, 2 Apr 2020 20:11:50 +0200 (CEST) Received: from Internal Mail-Server by MTLPINE2 (envelope-from akozyrev@mellanox.com) with ESMTPS (AES256-SHA encrypted); 2 Apr 2020 21:11:49 +0300 Received: from pegasus02.mtr.labs.mlnx. (pegasus02.mtr.labs.mlnx [10.210.16.122]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id 032IBnQr028687; Thu, 2 Apr 2020 21:11:49 +0300 From: Alexander Kozyrev <akozyrev@mellanox.com> To: dev@dpdk.org Cc: rasland@mellanox.com, matan@mellanox.com, viacheslavo@mellanox.com Date: Thu, 2 Apr 2020 18:11:45 +0000 Message-Id: <1585851108-485-1-git-send-email-akozyrev@mellanox.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1585691559-17409-1-git-send-email-akozyrev@mellanox.com> References: <1585691559-17409-1-git-send-email-akozyrev@mellanox.com> Subject: [dpdk-dev] [PATCH 0/3] net/mlx5: add large packet size support to MPRQ X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 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 Sender: "dev" <dev-bounces@dpdk.org> |
Series |
net/mlx5: add large packet size support to MPRQ
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Message
Alexander Kozyrev
April 2, 2020, 6:11 p.m. UTC
In order to support the 9K MTU the MPRQ feature should be updated
to allow a packet to take more than one stride (single linear buffer).
Receiving a packet into multiple adjacent strides should be implemented.
The reason preventing the packet to be received into multiple strides is
that the data buffer must be preceded with some HEAD_ROOM space.
In the current implementation the HEAD_ROOM space is borrowed by the PMD
from the tail of the preceding stride. If packet takes multiple strides
the tail of stride may be overwritten with a packet data and the memory
can't be borrowed to provide the HEAD_ROOM space for the next packet.
Special care is needed to prevent the HEAD_ROOM corruption as such:
- copy a whole packet into a separate memory buffer if scatter is off
- copy an overlapping data only and craft a multi-segment mbuf otherwise
After multi-stride support for packets receiving is in place it is
possible to reduce the stride size for more efficient memory utilization.
Introduce the mprq_log_stride_size device parameter to configure
a stride size for MPRQ. Default stride size is set to 2048 bytes.
Signed-off-by: Alexander Kozyrev <akozyrev@mellanox.com>
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v1: https://patchwork.dpdk.org/cover/67558/
v2: merge documentation and implementation in one commit
Alexander Kozyrev (3):
net/mlx5: add a devarg to specify MPRQ stride size
net/mlx5: enable MPRQ multi-stride operations
net/mlx5: add multi-segment packets in MPRQ mode
doc/guides/nics/mlx5.rst | 9 +++
doc/guides/rel_notes/release_20_05.rst | 1 +
drivers/net/mlx5/mlx5.c | 34 ++++++++--
drivers/net/mlx5/mlx5.h | 1 +
drivers/net/mlx5/mlx5_defs.h | 3 +
drivers/net/mlx5/mlx5_rxq.c | 47 ++++++--------
drivers/net/mlx5/mlx5_rxtx.c | 113 +++++++++++++++++++--------------
drivers/net/mlx5/mlx5_rxtx.h | 2 +-
8 files changed, 128 insertions(+), 82 deletions(-)