datapath: Increased IVSHM buffer size and Tx retries

Change-Id: I83fdfd33f7a620b8c1ec30f5bd2b1eee1b0dd0f4
Signed-off-by: Kevin Traynor <kevin.traynor@intel.com>
Reviewed-by: Meghan Halton <meghan.halton@intel.com>
datapath: Increased VHOST Tx retry num

Change-Id: If5c38514d8dfb5d6d335eb1876ac4dc6b57009a8
Signed-off-by: Kevin Traynor <kevin.traynor@intel.com>
Reviewed-by: Meghan Halton <meghan.halton@intel.com>
datapath: Increased phy Rx/Tx ring size

Change-Id: If7b47365918f9fdd4cd850f4488359c70f4901aa
Signed-off-by: Kevin Traynor <kevin.traynor@intel.com>
Reviewed-by: Meghan Halton <meghan.halton@intel.com>
docs: Update performance tuning doc with compile time parameters

Add compile time specifics on how to tune vHost and IVSHM ports.

Change-Id: I1238af18e12a8c4206ad20c298869ed87555850d
Signed-off-by: Meghan Halton <meghan.halton@intel.com>
Reviewed-by: Kevin Traynor <kevin.traynor@intel.com>