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| author | Björn Töpel <bjorn.topel@intel.com> | 2020-08-25 14:35:54 +0300 |
|---|---|---|
| committer | Tony Nguyen <anthony.l.nguyen@intel.com> | 2020-09-14 19:45:35 +0300 |
| commit | f78bd13027d9d43a6f5f3469377cd6bfd4218a14 (patch) | |
| tree | 9347ba9527a76cc332dd913059fd93aeb0897354 /drivers/net/ethernet/intel/i40e/i40e_txrx_common.h | |
| parent | 1fa5cef283420b3dad93cd6ab04d7125bc1562de (diff) | |
| download | linux-f78bd13027d9d43a6f5f3469377cd6bfd4218a14.tar.xz | |
i40e, xsk: remove HW descriptor prefetch in AF_XDP path
The software prefetching of HW descriptors has a negative impact on
the performance. Therefore, it is now removed.
Performance for the rx_drop benchmark increased with 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_txrx_common.h')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_txrx_common.h | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx_common.h b/drivers/net/ethernet/intel/i40e/i40e_txrx_common.h index 667c4dc4b39f..1397dd3c1c57 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx_common.h +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx_common.h @@ -99,19 +99,6 @@ static inline bool i40e_rx_is_programming_status(u64 qword1) return qword1 & I40E_RXD_QW1_LENGTH_SPH_MASK; } -/** - * i40e_inc_ntc: Advance the next_to_clean index - * @rx_ring: Rx ring - **/ -static inline void i40e_inc_ntc(struct i40e_ring *rx_ring) -{ - u32 ntc = rx_ring->next_to_clean + 1; - - ntc = (ntc < rx_ring->count) ? ntc : 0; - rx_ring->next_to_clean = ntc; - prefetch(I40E_RX_DESC(rx_ring, ntc)); -} - void i40e_xsk_clean_rx_ring(struct i40e_ring *rx_ring); void i40e_xsk_clean_tx_ring(struct i40e_ring *tx_ring); bool i40e_xsk_any_rx_ring_enabled(struct i40e_vsi *vsi); |