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Commit 016890b9 authored by Jesse Brandeburg's avatar Jesse Brandeburg Committed by Jeff Kirsher
Browse files

i40e/i40evf: enable prefetch of Tx descriptors during cleanup 



Performance can be improved a bit by imitating ixgbe and using
prefetch to get us the next Tx descriptor.

Change-ID: Ice7ffd4cd0ce87c35295059bdb7972a7f53723aa
Signed-off-by: default avatarJesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent d9e894ee

drivers/net/ethernet/intel/i40e/i40e_txrx.c

+2 −0
Original line number Diff line number Diff line
@@ -770,6 +770,8 @@ static bool i40e_clean_tx_irq(struct i40e_ring *tx_ring, int budget) 
			tx_desc = I40E_TX_DESC(tx_ring, 0);

		}



		prefetch(tx_desc);



		/* update budget accounting */

		budget--;

	} while (likely(budget));

drivers/net/ethernet/intel/i40evf/i40e_txrx.c

+2 −0
Original line number Diff line number Diff line
@@ -289,6 +289,8 @@ static bool i40e_clean_tx_irq(struct i40e_ring *tx_ring, int budget) 
			tx_desc = I40E_TX_DESC(tx_ring, 0);

		}



		prefetch(tx_desc);



		/* update budget accounting */

		budget--;

	} while (likely(budget));