diff options
| author | Björn Töpel <bjorn.topel@intel.com> | 2020-08-25 13:35:54 +0200 |
|---|---|---|
| committer | Tony Nguyen <anthony.l.nguyen@intel.com> | 2020-09-14 09:45:35 -0700 |
| commit | f78bd13027d9d43a6f5f3469377cd6bfd4218a14 (patch) | |
| tree | 9347ba9527a76cc332dd913059fd93aeb0897354 /drivers/net/ethernet/intel/i40e/i40e_xsk.c | |
| parent | 1fa5cef283420b3dad93cd6ab04d7125bc1562de (diff) | |
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_xsk.c')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_xsk.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.c b/drivers/net/ethernet/intel/i40e/i40e_xsk.c index 2a1153d8957b..cf48758447c2 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_xsk.c +++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.c @@ -258,6 +258,18 @@ static struct sk_buff *i40e_construct_skb_zc(struct i40e_ring *rx_ring, } /** + * i40e_inc_ntc: Advance the next_to_clean index + * @rx_ring: Rx ring + **/ +static 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; +} + +/** * i40e_clean_rx_irq_zc - Consumes Rx packets from the hardware ring * @rx_ring: Rx ring * @budget: NAPI budget |