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Tune the ethernet input untagged l2-bridging case

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Change-Id: I62fe0834e1031e191787a26452fb167c33e30ffd
Signed-off-by: Dave Barach <dave@barachs.net>
This commit is contained in:
Dave Barach
2016-11-16 10:23:50 -05:00
parent fbb2ef6456
commit cfba1e2476
1 changed files with 83 additions and 0 deletions
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83
vnet/vnet/ethernet/node.c
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@ -292,6 +292,8 @@ ethernet_input_inline (vlib_main_t * vm,
u32 n_left_from, next_index, *from, *to_next;
u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
u32 cpu_index = os_get_cpu_number ();
u32 cached_sw_if_index = ~0;
u32 cached_is_l2 = 0; /* shut up gcc */
if (variant != ETHERNET_INPUT_VARIANT_ETHERNET)
error_node = vlib_node_get_runtime (vm, ethernet_input_node.index);
@ -333,6 +335,7 @@ ethernet_input_inline (vlib_main_t * vm,
vlan_intf_t *vlan_intf0, *vlan_intf1;
qinq_intf_t *qinq_intf0, *qinq_intf1;
u32 is_l20, is_l21;
ethernet_header_t *e0, *e1;
/* Prefetch next iteration. */
{
@ -361,6 +364,51 @@ ethernet_input_inline (vlib_main_t * vm,
b1 = vlib_get_buffer (vm, bi1);
error0 = error1 = ETHERNET_ERROR_NONE;
e0 = vlib_buffer_get_current (b0);
type0 = clib_net_to_host_u16 (e0->type);
e1 = vlib_buffer_get_current (b1);
type1 = clib_net_to_host_u16 (e1->type);
/* Speed-path for the untagged L2 case */
if (PREDICT_TRUE (variant == ETHERNET_INPUT_VARIANT_ETHERNET
&& !ethernet_frame_is_tagged (type0)
&& !ethernet_frame_is_tagged (type1)))
{
main_intf_t *intf0;
subint_config_t *subint0;
u32 sw_if_index0, sw_if_index1;
sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
is_l20 = cached_is_l2;
/* This is probably wholly unnecessary */
if (PREDICT_FALSE (sw_if_index0 != sw_if_index1))
goto slowpath;
if (PREDICT_FALSE (cached_sw_if_index != sw_if_index0))
{
cached_sw_if_index = sw_if_index0;
hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
intf0 = vec_elt_at_index (em->main_intfs, hi0->hw_if_index);
subint0 = &intf0->untagged_subint;
cached_is_l2 = is_l20 = subint0->flags & SUBINT_CONFIG_L2;
}
if (PREDICT_TRUE (is_l20 != 0))
{
next0 = em->l2_next;
vnet_buffer (b0)->l2.l2_len = sizeof (ethernet_header_t);
vnet_buffer (b0)->ethernet.start_of_ethernet_header =
b0->current_data;
next1 = em->l2_next;
vnet_buffer (b1)->l2.l2_len = sizeof (ethernet_header_t);
vnet_buffer (b1)->ethernet.start_of_ethernet_header =
b1->current_data;
goto ship_it01;
}
/* FALLTHROUGH into the general case */
}
slowpath:
parse_header (variant,
b0,
@ -484,6 +532,7 @@ ethernet_input_inline (vlib_main_t * vm,
b0->error = error_node->errors[error0];
b1->error = error_node->errors[error1];
ship_it01:
// verify speculative enqueue
vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
n_left_to_next, bi0, bi1, next0,
@ -503,6 +552,7 @@ ethernet_input_inline (vlib_main_t * vm,
main_intf_t *main_intf0;
vlan_intf_t *vlan_intf0;
qinq_intf_t *qinq_intf0;
ethernet_header_t *e0;
u32 is_l20;
// Prefetch next iteration
@ -525,6 +575,38 @@ ethernet_input_inline (vlib_main_t * vm,
b0 = vlib_get_buffer (vm, bi0);
error0 = ETHERNET_ERROR_NONE;
e0 = vlib_buffer_get_current (b0);
type0 = clib_net_to_host_u16 (e0->type);
/* Speed-path for the untagged L2 case */
if (PREDICT_TRUE (variant == ETHERNET_INPUT_VARIANT_ETHERNET
&& !ethernet_frame_is_tagged (type0)))
{
main_intf_t *intf0;
subint_config_t *subint0;
u32 sw_if_index0;
sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
is_l20 = cached_is_l2;
if (PREDICT_FALSE (cached_sw_if_index != sw_if_index0))
{
cached_sw_if_index = sw_if_index0;
hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
intf0 = vec_elt_at_index (em->main_intfs, hi0->hw_if_index);
subint0 = &intf0->untagged_subint;
cached_is_l2 = is_l20 = subint0->flags & SUBINT_CONFIG_L2;
}
if (PREDICT_TRUE (is_l20 != 0))
{
next0 = em->l2_next;
vnet_buffer (b0)->l2.l2_len = sizeof (ethernet_header_t);
vnet_buffer (b0)->ethernet.start_of_ethernet_header =
b0->current_data;
goto ship_it0;
}
/* FALLTHROUGH into the general case */
}
parse_header (variant,
b0,
@ -607,6 +689,7 @@ ethernet_input_inline (vlib_main_t * vm,
b0->error = error_node->errors[error0];
// verify speculative enqueue
ship_it0:
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next,
bi0, next0);