net/af_xdp: enable custom XDP program loading

[dpdk.git] / doc / guides / nics / mlx5.rst

diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst
index 90202c0..b0614ae 100644 (file)
--- a/doc/guides/nics/mlx5.rst
+++ b/doc/guides/nics/mlx5.rst
@@ -253,6 +253,14 @@ Limitations
   reported via device xstats to assist applications to detect the
   time-related problems.
 
   reported via device xstats to assist applications to detect the
   time-related problems.
 

+  The timestamp upper "too-distant-future" limit
+  at the moment of invoking the Tx burst routine
+  can be estimated as ``tx_pp`` option (in nanoseconds) multiplied by 2^23.
+  Please note, for the testpmd txonly mode,
+  the limit is deduced from the expression::
+
+        (n_tx_descriptors / burst_size + 1) * inter_burst_gap
+

   There is no any packet reordering according timestamps is supposed,
   neither within packet burst, nor between packets, it is an entirely
   application responsibility to generate packets and its timestamps
   There is no any packet reordering according timestamps is supposed,
   neither within packet burst, nor between packets, it is an entirely
   application responsibility to generate packets and its timestamps


@@ -1239,8 +1247,8 @@ Quick Start Guide on OFED/EN
 
         echo [num_vfs] > /sys/class/infiniband/mlx5_0/device/sriov_numvfs
 
 
         echo [num_vfs] > /sys/class/infiniband/mlx5_0/device/sriov_numvfs
 

-6. Compile DPDK and you are ready to go. See instructions on
-   :ref:`Development Kit Build System <Development_Kit_Build_System>`
+6. Install DPDK and you are ready to go.
+   See :doc:`compilation instructions <../linux_gsg/build_dpdk>`.

 
 Enable switchdev mode
 ---------------------
 
 Enable switchdev mode
 ---------------------