AuxXxilium/linux_dsm_epyc7002
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ice: optimize for XDP_REDIRECT in xsk path

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[ Upstream commit bb52073645a618ab4d93c8d932fb8faf114c55bc ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Magnus Karlsson 2020-12-02 16:07:24 +01:00 committed by Greg Kroah-Hartman
parent 7bd82b73d5
commit 9e1eb42884
1 changed files with 8 additions and 4 deletions
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12
drivers/net/ethernet/intel/ice/ice_xsk.c
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@ -524,6 +524,14 @@ ice_run_xdp_zc(struct ice_ring *rx_ring, struct xdp_buff *xdp)
}
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;
@ -531,10 +539,6 @@ 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;