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tcp: fix single loop prefetch

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Also add single loop prefetch in session tx

Change-Id: Ib2725a2552fcc1a65050d7a2eb10491a7b34db62
Signed-off-by: Florin Coras <fcoras@cisco.com>
This commit is contained in:
Florin Coras
2018-06-30 11:27:59 -07:00
parent 0d5a195ce4
commit 91ca462b58
2 changed files with 9 additions and 3 deletions
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8
src/vnet/session/session_node.c
View File

@ -483,7 +483,13 @@ session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_buffer_t *b0;
u32 bi0;
ASSERT (n_bufs >= 1);
if (n_left > 1)
{
pbi = smm->tx_buffers[thread_index][n_bufs - 2];
pb = vlib_get_buffer (vm, pbi);
vlib_prefetch_buffer_header (pb, STORE);
}
to_next[0] = bi0 = smm->tx_buffers[thread_index][--n_bufs];
b0 = vlib_get_buffer (vm, bi0);
session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);

4
src/vnet/tcp/tcp_output.c
View File

@ -1996,8 +1996,8 @@ tcp46_output_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
if (n_left_from > 1)
{
vlib_prefetch_buffer_header (b[0], STORE);
CLIB_PREFETCH (b[0]->data, 2 * CLIB_CACHE_LINE_BYTES, STORE);
vlib_prefetch_buffer_header (b[1], STORE);
CLIB_PREFETCH (b[1]->data, 2 * CLIB_CACHE_LINE_BYTES, STORE);
}
next[0] = TCP_OUTPUT_NEXT_IP_LOOKUP;