diff options
| author | Björn Töpel <bjorn.topel@intel.com> | 2020-08-25 13:35:55 +0200 |
|---|---|---|
| committer | Tony Nguyen <anthony.l.nguyen@intel.com> | 2020-09-14 09:45:35 -0700 |
| commit | f0064bfd969bea0d65ef20d191bea8b7494b4ec8 (patch) | |
| tree | fa2cfffc47a4074f469910ccbb4f444881759029 /drivers/net/ethernet/intel/i40e/i40e.h | |
| parent | f78bd13027d9d43a6f5f3469377cd6bfd4218a14 (diff) | |
i40e: use 16B HW descriptors instead of 32B
The i40e NIC supports two flavors of HW descriptors, 16 and 32
byte. The latter has, obviously, room for more offloading
information. However, the only fields of the 32B HW descriptor that is
being used by the driver, is also available in the 16B descriptor.
In other words; Reading and writing 32 bytes instead of 16 byte is a
waste of bus bandwidth.
This commit starts using 16 byte descriptors instead of 32 byte
descriptors.
For AF_XDP the rx_drop benchmark was improved by 2%.
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/i40e/i40e.h')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h index a7e212d1caa2..ada0e93c38f0 100644 --- a/drivers/net/ethernet/intel/i40e/i40e.h +++ b/drivers/net/ethernet/intel/i40e/i40e.h @@ -90,7 +90,7 @@ #define I40E_OEM_RELEASE_MASK 0x0000ffff #define I40E_RX_DESC(R, i) \ - (&(((union i40e_32byte_rx_desc *)((R)->desc))[i])) + (&(((union i40e_rx_desc *)((R)->desc))[i])) #define I40E_TX_DESC(R, i) \ (&(((struct i40e_tx_desc *)((R)->desc))[i])) #define I40E_TX_CTXTDESC(R, i) \ |