diff options
Diffstat (limited to 'doc/guides/nics/i40e.rst')
| -rw-r--r-- | doc/guides/nics/i40e.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/doc/guides/nics/i40e.rst b/doc/guides/nics/i40e.rst index ab3928a6..bfacbd11 100644 --- a/doc/guides/nics/i40e.rst +++ b/doc/guides/nics/i40e.rst @@ -172,6 +172,13 @@ Runtime Config Options -w 84:00.0,use-latest-supported-vec=1 +Vector RX Pre-conditions +~~~~~~~~~~~~~~~~~~~~~~~~ +For Vector RX it is assumed that the number of descriptor rings will be a power +of 2. With this pre-condition, the ring pointer can easily scroll back to the +head after hitting the tail without a conditional check. In addition Vector RX +can use this assumption to do a bit mask using ``ring_size - 1``. + Driver compilation and testing ------------------------------ |