diff options
| author | Magnus Karlsson <magnus.karlsson@intel.com> | 2020-12-02 18:07:24 +0300 |
|---|---|---|
| committer | Tony Nguyen <anthony.l.nguyen@intel.com> | 2021-03-15 22:04:51 +0300 |
| commit | bb52073645a618ab4d93c8d932fb8faf114c55bc (patch) | |
| tree | 5772604124f6fbe65cfdcf63c913b77d20d3a4f6 /drivers/net/ethernet/intel | |
| parent | 7d52fe2eaddfa3d7255d43c3e89ebf2748b7ea7a (diff) | |
| download | linux-bb52073645a618ab4d93c8d932fb8faf114c55bc.tar.xz | |
ice: optimize for XDP_REDIRECT in xsk path
Optimize ice_run_xdp_zc() for the XDP program verdict being
XDP_REDIRECT in the xsk zero-copy path. This path is only used when
having AF_XDP zero-copy on and in that case most packets will be
directed to user space. This provides a little over 100k extra packets
in throughput on my server when running l2fwd in xdpsock.
Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Tested-by: George Kuruvinakunnel <george.kuruvinakunnel@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel')
| -rw-r--r-- | drivers/net/ethernet/intel/ice/ice_xsk.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_xsk.c b/drivers/net/ethernet/intel/ice/ice_xsk.c index 83f3c9574ed1..727f277e9d75 100644 --- a/drivers/net/ethernet/intel/ice/ice_xsk.c +++ b/drivers/net/ethernet/intel/ice/ice_xsk.c @@ -473,6 +473,14 @@ ice_run_xdp_zc(struct ice_ring *rx_ring, struct xdp_buff *xdp) xdp_prog = READ_ONCE(rx_ring->xdp_prog); act = bpf_prog_run_xdp(xdp_prog, xdp); + + if (likely(act == XDP_REDIRECT)) { + err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog); + result = !err ? ICE_XDP_REDIR : ICE_XDP_CONSUMED; + rcu_read_unlock(); + return result; + } + switch (act) { case XDP_PASS: break; @@ -480,10 +488,6 @@ ice_run_xdp_zc(struct ice_ring *rx_ring, struct xdp_buff *xdp) xdp_ring = rx_ring->vsi->xdp_rings[rx_ring->q_index]; result = ice_xmit_xdp_buff(xdp, xdp_ring); break; - case XDP_REDIRECT: - err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog); - result = !err ? ICE_XDP_REDIR : ICE_XDP_CONSUMED; - break; default: bpf_warn_invalid_xdp_action(act); fallthrough; |