net/dpaa2: add dpdmux mc flib

[dpdk.git] / doc / guides / nics / mlx4.rst

diff --git a/doc/guides/nics/mlx4.rst b/doc/guides/nics/mlx4.rst
index 9564f89..5326d91 100644 (file)
--- a/doc/guides/nics/mlx4.rst
+++ b/doc/guides/nics/mlx4.rst
@@ -85,14 +85,6 @@ These options can be modified in the ``.config`` file.
   adds additional run-time checks and debugging messages at the cost of
   lower performance.
 
   adds additional run-time checks and debugging messages at the cost of
   lower performance.
 

-- ``CONFIG_RTE_LIBRTE_MLX4_TX_MP_CACHE`` (default **8**)
-
-  Maximum number of cached memory pools (MPs) per TX queue. Each MP from
-  which buffers are to be transmitted must be associated to memory regions
-  (MRs). This is a slow operation that must be cached.
-
-  This value is always 1 for RX queues since they use a single MP.
-

 Environment variables
 ~~~~~~~~~~~~~~~~~~~~~
 
 Environment variables
 ~~~~~~~~~~~~~~~~~~~~~
 


@@ -143,6 +135,16 @@ below.
     following limitation: VLAN filtering is not supported with this mode.
     This is the recommended mode in case VLAN filter is not needed.
 
     following limitation: VLAN filtering is not supported with this mode.
     This is the recommended mode in case VLAN filter is not needed.
 

+Limitations
+-----------
+
+- CRC stripping is supported by default and always reported as "true".
+  The ability to enable/disable CRC stripping requires OFED version
+  4.3-1.5.0.0 and above  or rdma-core version v18 and above.
+
+- TSO (Transmit Segmentation Offload) is supported in OFED version
+  4.4 and above.
+

 Prerequisites
 -------------
 
 Prerequisites
 -------------
 


@@ -211,7 +213,7 @@ Current RDMA core package and Linux kernel (recommended)
 Mellanox OFED as a fallback
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Mellanox OFED as a fallback
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
 

-- `Mellanox OFED`_ version: **4.2, 4.3**.
+- `Mellanox OFED`_ version: **4.4, 4.5**.

 - firmware version: **2.42.5000** and above.
 
 .. _`Mellanox OFED`: http://www.mellanox.com/page/products_dyn?product_family=26&mtag=linux_sw_drivers
 - firmware version: **2.42.5000** and above.
 
 .. _`Mellanox OFED`: http://www.mellanox.com/page/products_dyn?product_family=26&mtag=linux_sw_drivers


@@ -371,6 +373,12 @@ Performance tuning
         The XXX can be different on different systems. Make sure to configure
         according to the setpci output.
 
         The XXX can be different on different systems. Make sure to configure
         according to the setpci output.
 

+6. To minimize overhead of searching Memory Regions:
+
+   - '--socket-mem' is recommended to pin memory by predictable amount.
+   - Configure per-lcore cache when creating Mempools for packet buffer.
+   - Refrain from dynamically allocating/freeing memory in run-time.
+

 Usage example
 -------------
 
 Usage example
 -------------