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authorZhiyong Yang <zhiyong.yang@intel.com>2020-03-27 17:12:35 +0000
committerDamjan Marion <dmarion@me.com>2020-04-22 13:03:44 +0000
commit703128816ff8504340dcb512ff05935dab6b2e40 (patch)
treeb1acbd4f112eb9d269f00f33675419d321c70748
parent08d01376de5abf2e93c562ee5e24cf62ce1be3ff (diff)
ethernet: put vlib_get_buffers together
The patch brings 0.8 clocks saved per pkt in IPv4 l3fwd case on Skylake. Type: improvement Signed-off-by: Zhiyong Yang <zhiyong.yang@intel.com> Change-Id: Ia8d3a27773bf959433380d7c219602b1e4a8e5bd
-rwxr-xr-xsrc/vnet/ethernet/node.c17
1 files changed, 6 insertions, 11 deletions
diff --git a/src/vnet/ethernet/node.c b/src/vnet/ethernet/node.c
index 29c0a5b9dee..cc27b6f5da9 100755
--- a/src/vnet/ethernet/node.c
+++ b/src/vnet/ethernet/node.c
@@ -842,18 +842,15 @@ eth_input_process_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
u16 et_vlan = clib_host_to_net_u16 (ETHERNET_TYPE_VLAN);
u16 et_dot1ad = clib_host_to_net_u16 (ETHERNET_TYPE_DOT1AD);
i32 n_left = n_packets;
- vlib_buffer_t *b[20];
- u32 *from;
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE];
+ vlib_buffer_t **b = bufs;
ethernet_interface_t *ei = ethernet_get_interface (em, hi->hw_if_index);
- from = buffer_indices;
+ vlib_get_buffers (vm, buffer_indices, b, n_left);
while (n_left >= 20)
{
vlib_buffer_t **ph = b + 16, **pd = b + 8;
- vlib_get_buffers (vm, from, b, 4);
- vlib_get_buffers (vm, from + 8, pd, 4);
- vlib_get_buffers (vm, from + 16, ph, 4);
vlib_prefetch_buffer_header (ph[0], LOAD);
vlib_prefetch_buffer_data (pd[0], LOAD);
@@ -874,15 +871,14 @@ eth_input_process_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
eth_input_adv_and_flags_x4 (b, main_is_l3);
/* next */
+ b += 4;
n_left -= 4;
etype += 4;
tag += 4;
dmac += 4;
- from += 4;
}
while (n_left >= 4)
{
- vlib_get_buffers (vm, from, b, 4);
eth_input_get_etype_and_tags (b, etype, tag, dmac, 0, dmac_check);
eth_input_get_etype_and_tags (b, etype, tag, dmac, 1, dmac_check);
eth_input_get_etype_and_tags (b, etype, tag, dmac, 2, dmac_check);
@@ -890,24 +886,23 @@ eth_input_process_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
eth_input_adv_and_flags_x4 (b, main_is_l3);
/* next */
+ b += 4;
n_left -= 4;
etype += 4;
tag += 4;
dmac += 4;
- from += 4;
}
while (n_left)
{
- vlib_get_buffers (vm, from, b, 1);
eth_input_get_etype_and_tags (b, etype, tag, dmac, 0, dmac_check);
eth_input_adv_and_flags_x1 (b, main_is_l3);
/* next */
+ b += 1;
n_left -= 1;
etype += 1;
tag += 1;
dmac += 4;
- from += 1;
}
if (dmac_check)