diff options
| author | Magnus Karlsson <magnus.karlsson@intel.com> | 2020-06-23 12:44:16 +0300 |
|---|---|---|
| committer | Tony Nguyen <anthony.l.nguyen@intel.com> | 2020-07-02 00:24:14 +0300 |
| commit | 5574ff7b7b3d864556173bf822796593451a6b8c (patch) | |
| tree | 59323f13fd3ac15b2a7e2f60880077a8cd32e425 /drivers/net/ethernet/intel/i40e/i40e_xsk.h | |
| parent | 753f3884f253de6b6d3a516e6651bda0baf4aede (diff) | |
| download | linux-5574ff7b7b3d864556173bf822796593451a6b8c.tar.xz | |
i40e: optimize AF_XDP Tx completion path
Improve the performance of the AF_XDP zero-copy Tx completion
path. When there are no XDP buffers being sent using XDP_TX or
XDP_REDIRECT, we do not have go through the SW ring to clean up any
entries since the AF_XDP path does not use these. In these cases, just
fast forward the next-to-use counter and skip going through the SW
ring. The limit on the maximum number of entries to complete is also
removed since the algorithm is now O(1). To simplify the code path, the
maximum number of entries to complete for the XDP path is therefore
also increased from 256 to 512 (the default number of Tx HW
descriptors). This should be fine since the completion in the XDP path
is faster than in the SKB path that has 256 as the maximum number.
This patch provides around 4% throughput improvement for the l2fwd
application in xdpsock on my machine.
Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Reviewed-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/i40e/i40e_xsk.h')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_xsk.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.h b/drivers/net/ethernet/intel/i40e/i40e_xsk.h index ea919a7d60ec..c524c142127f 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_xsk.h +++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.h @@ -15,8 +15,7 @@ int i40e_xsk_umem_setup(struct i40e_vsi *vsi, struct xdp_umem *umem, bool i40e_alloc_rx_buffers_zc(struct i40e_ring *rx_ring, u16 cleaned_count); int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget); -bool i40e_clean_xdp_tx_irq(struct i40e_vsi *vsi, - struct i40e_ring *tx_ring, int napi_budget); +bool i40e_clean_xdp_tx_irq(struct i40e_vsi *vsi, struct i40e_ring *tx_ring); int i40e_xsk_wakeup(struct net_device *dev, u32 queue_id, u32 flags); int i40e_alloc_rx_bi_zc(struct i40e_ring *rx_ring); void i40e_clear_rx_bi_zc(struct i40e_ring *rx_ring); |