Commit 3b80d106 authored by Magnus Karlsson's avatar Magnus Karlsson Committed by Daniel Borkmann

samples/bpf: Consider frame size in tx_only of xdpsock sample

Fix the tx_only micro-benchmark in xdpsock to take frame size into
consideration. It was hardcoded to the default value of frame_size
which is 4K. Changing this on the command line to 2K made half of the
packets illegal as they were outside the umem and were therefore
discarded by the kernel.

Fixes: 46738f73 ("samples/bpf: add use of need_wakeup flag in xdpsock")
Signed-off-by: default avatarMagnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarMaciej Fijalkowski <maciej.fijalkowski@intel.com>
Link: https://lore.kernel.org/bpf/20210506124349.6666-1-magnus.karlsson@gmail.com
parent 9683e577
...@@ -1255,7 +1255,7 @@ static void tx_only(struct xsk_socket_info *xsk, u32 *frame_nb, int batch_size) ...@@ -1255,7 +1255,7 @@ static void tx_only(struct xsk_socket_info *xsk, u32 *frame_nb, int batch_size)
for (i = 0; i < batch_size; i++) { for (i = 0; i < batch_size; i++) {
struct xdp_desc *tx_desc = xsk_ring_prod__tx_desc(&xsk->tx, struct xdp_desc *tx_desc = xsk_ring_prod__tx_desc(&xsk->tx,
idx + i); idx + i);
tx_desc->addr = (*frame_nb + i) << XSK_UMEM__DEFAULT_FRAME_SHIFT; tx_desc->addr = (*frame_nb + i) * opt_xsk_frame_size;
tx_desc->len = PKT_SIZE; tx_desc->len = PKT_SIZE;
} }
......
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