diff options
| -rw-r--r-- | samples/bpf/xdpsock_user.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c index 4cead341ae57..b6175cb9a31d 100644 --- a/samples/bpf/xdpsock_user.c +++ b/samples/bpf/xdpsock_user.c @@ -897,6 +897,14 @@ static inline void complete_tx_l2fwd(struct xsk_socket_info *xsk, if (!xsk->outstanding_tx) return; + /* In copy mode, Tx is driven by a syscall so we need to use e.g. sendto() to + * really send the packets. In zero-copy mode we do not have to do this, since Tx + * is driven by the NAPI loop. So as an optimization, we do not have to call + * sendto() all the time in zero-copy mode for l2fwd. + */ + if (opt_xdp_bind_flags & XDP_COPY) + kick_tx(xsk); + ndescs = (xsk->outstanding_tx > opt_batch_size) ? opt_batch_size : xsk->outstanding_tx; |