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| author | Jesse Brandeburg | 2015-02-27 10:15:31 +0100 |
|---|---|---|
| committer | Jeff Kirsher | 2015-03-07 16:01:05 +0100 |
| commit | 016890b99482745646de091d795384efd83f5d20 (patch) | |
| tree | ed5537eb7fb4ec0b59491ae48fca1c92e0a526ae /drivers/net/ethernet | |
| parent | i40e: Simplify code for rss_size_max config (diff) | |
| download | kernel-qcow2-linux-016890b99482745646de091d795384efd83f5d20.tar.gz kernel-qcow2-linux-016890b99482745646de091d795384efd83f5d20.tar.xz kernel-qcow2-linux-016890b99482745646de091d795384efd83f5d20.zip | |
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: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_txrx.c | 2 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/i40evf/i40e_txrx.c | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c index a60b8405f046..f5a50b9366cb 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c @@ -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)); diff --git a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c index 1c2637b28728..d9f3db542c5f 100644 --- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.c @@ -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)); |