From: Adrien Mazarguil <adrien.mazarguil@6wind.com>
To: dev@dpdk.org
Subject: [dpdk-dev] [PATCH 14/14] mlx5: add environment variables section to documentation
Date: Mon, 23 Nov 2015 15:44:49 +0100 [thread overview]
Message-ID: <1448289889-9590-15-git-send-email-adrien.mazarguil@6wind.com> (raw)
In-Reply-To: <1448289889-9590-1-git-send-email-adrien.mazarguil@6wind.com>
From: Olga Shern <olgas@mellanox.com>
Describe how applications can benefit from CQE compression.
Signed-off-by: Olga Shern <olgas@mellanox.com>
Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
---
doc/guides/nics/mlx5.rst | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst
index 2d68914..eb8c042 100644
--- a/doc/guides/nics/mlx5.rst
+++ b/doc/guides/nics/mlx5.rst
@@ -130,6 +130,19 @@ These options can be modified in the ``.config`` file.
This value is always 1 for RX queues since they use a single MP.
+Environment variables
+~~~~~~~~~~~~~~~~~~~~~
+
+- ``MLX5_ENABLE_CQE_COMPRESSION``
+
+ A nonzero value lets ConnectX-4 return smaller completion entries to
+ improve performance when PCI backpressure is detected. It is most useful
+ for scenarios involving heavy traffic on many queues.
+
+ Since the additional software logic necessary to handle this mode can
+ lower performance when there is no backpressure, it is not enabled by
+ default.
+
Run-time configuration
~~~~~~~~~~~~~~~~~~~~~~
--
2.1.0
next prev parent reply other threads:[~2015-11-23 14:46 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-23 14:44 [dpdk-dev] [PATCH 00/14] Fixes for mlx4 and mlx5 Adrien Mazarguil
2015-11-23 14:44 ` [dpdk-dev] [PATCH 01/14] mlx4: fix possible crash when clearing device statistics Adrien Mazarguil
2015-11-23 14:44 ` [dpdk-dev] [PATCH 02/14] mlx4: fix memory registration for indirect mbuf data Adrien Mazarguil
2015-11-23 14:44 ` [dpdk-dev] [PATCH 03/14] mlx4: fix TX for scattered mbufs with too many segments Adrien Mazarguil
2015-11-23 14:44 ` [dpdk-dev] [PATCH 04/14] mlx4: fix TX packet loss after initialization Adrien Mazarguil
2015-11-23 14:44 ` [dpdk-dev] [PATCH 05/14] mlx4: fix local protection error when TX MP to MR cache is full Adrien Mazarguil
2015-11-23 14:44 ` [dpdk-dev] [PATCH 06/14] mlx4: fix available entries in TX rings Adrien Mazarguil
2015-11-23 14:44 ` [dpdk-dev] [PATCH 07/14] mlx4: allow operation in secondary processes Adrien Mazarguil
2015-11-23 14:44 ` [dpdk-dev] [PATCH 08/14] mlx5: fix possible crash when clearing device statistics Adrien Mazarguil
2015-11-23 14:44 ` [dpdk-dev] [PATCH 09/14] mlx5: fix memory registration for indirect mbuf data Adrien Mazarguil
2015-11-23 14:44 ` [dpdk-dev] [PATCH 10/14] mlx5: fix TX for scattered mbufs with too many segments Adrien Mazarguil
2015-11-23 14:44 ` [dpdk-dev] [PATCH 11/14] mlx5: fix TX packet loss after initialization Adrien Mazarguil
2015-11-23 14:44 ` [dpdk-dev] [PATCH 12/14] mlx5: fix local protection error when TX MP to MR cache is full Adrien Mazarguil
2015-11-23 14:44 ` [dpdk-dev] [PATCH 13/14] mlx5: fix available entries in TX rings Adrien Mazarguil
2015-11-23 14:44 ` Adrien Mazarguil [this message]
2015-11-24 16:32 ` [dpdk-dev] [PATCH 00/14] Fixes for mlx4 and mlx5 Thomas Monjalon
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