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authorZhiyong Yang <zhiyong.yang@intel.com>2018-09-04 06:33:18 -0400
committerNeale Ranns <nranns@cisco.com>2018-09-06 15:50:44 +0000
commit6011b5e63b6fd51b8eb19b5c999fb1e18e95f157 (patch)
tree9ce67188366c761ca8968f0afb472ec57a8a94a6
parentecbe6f5eb971e57df108f86d52cd005a07e18712 (diff)
vxlan_gpe: optimize encap performance
The patch can reduce 13 cycles per packet for the graph node vxlan-gpe-encap and increases 5% or so vxlan_gpe encap throughput on Haswell platform for the best case (All pkts have the same sw_if_index). Change-Id: I9c70fd3e0f2f0a9d922cf64970d0b0d51b772024 Signed-off-by: Zhiyong Yang <zhiyong.yang@intel.com>
-rw-r--r--src/vnet/vxlan-gpe/encap.c79
1 files changed, 47 insertions, 32 deletions
diff --git a/src/vnet/vxlan-gpe/encap.c b/src/vnet/vxlan-gpe/encap.c
index e62a84ed59f..9006b1b943d 100644
--- a/src/vnet/vxlan-gpe/encap.c
+++ b/src/vnet/vxlan-gpe/encap.c
@@ -164,6 +164,10 @@ vxlan_gpe_encap (vlib_main_t * vm,
while (n_left_from > 0)
{
u32 n_left_to_next;
+ u32 sw_if_index0 = ~0, sw_if_index1 = ~0, len0, len1;
+ vnet_hw_interface_t *hi0, *hi1;
+ vxlan_gpe_tunnel_t *t0 = NULL, *t1 = NULL;
+ u8 is_ip4_0 = 0, is_ip4_1 = 0;
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
@@ -172,10 +176,6 @@ vxlan_gpe_encap (vlib_main_t * vm,
u32 bi0, bi1;
vlib_buffer_t *b0, *b1;
u32 next0, next1;
- u32 sw_if_index0, sw_if_index1, len0, len1;
- vnet_hw_interface_t *hi0, *hi1;
- vxlan_gpe_tunnel_t *t0, *t1;
- u8 is_ip4_0, is_ip4_1;
next0 = next1 = VXLAN_GPE_ENCAP_NEXT_IP4_LOOKUP;
@@ -205,23 +205,39 @@ vxlan_gpe_encap (vlib_main_t * vm,
b0 = vlib_get_buffer (vm, bi0);
b1 = vlib_get_buffer (vm, bi1);
- /* 1-wide cache? */
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
- sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_TX];
- hi0 =
- vnet_get_sup_hw_interface (vnm,
- vnet_buffer (b0)->sw_if_index
- [VLIB_TX]);
- hi1 =
- vnet_get_sup_hw_interface (vnm,
- vnet_buffer (b1)->sw_if_index
- [VLIB_TX]);
-
- t0 = pool_elt_at_index (ngm->tunnels, hi0->dev_instance);
- t1 = pool_elt_at_index (ngm->tunnels, hi1->dev_instance);
+ /* get the flag "is_ip4" */
+ if (sw_if_index0 != vnet_buffer (b0)->sw_if_index[VLIB_TX])
+ {
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+ hi0 =
+ vnet_get_sup_hw_interface (vnm,
+ vnet_buffer (b0)->sw_if_index
+ [VLIB_TX]);
+ t0 = pool_elt_at_index (ngm->tunnels, hi0->dev_instance);
+ is_ip4_0 = (t0->flags & VXLAN_GPE_TUNNEL_IS_IPV4);
+ }
- is_ip4_0 = (t0->flags & VXLAN_GPE_TUNNEL_IS_IPV4);
- is_ip4_1 = (t1->flags & VXLAN_GPE_TUNNEL_IS_IPV4);
+ /* get the flag "is_ip4" */
+ if (sw_if_index1 != vnet_buffer (b1)->sw_if_index[VLIB_TX])
+ {
+ if (sw_if_index0 == vnet_buffer (b1)->sw_if_index[VLIB_TX])
+ {
+ sw_if_index1 = sw_if_index0;
+ hi1 = hi0;
+ t1 = t0;
+ is_ip4_1 = is_ip4_0;
+ }
+ else
+ {
+ sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_TX];
+ hi1 =
+ vnet_get_sup_hw_interface (vnm,
+ vnet_buffer (b1)->sw_if_index
+ [VLIB_TX]);
+ t1 = pool_elt_at_index (ngm->tunnels, hi1->dev_instance);
+ is_ip4_1 = (t1->flags & VXLAN_GPE_TUNNEL_IS_IPV4);
+ }
+ }
if (PREDICT_TRUE (is_ip4_0 == is_ip4_1))
{
@@ -305,10 +321,6 @@ vxlan_gpe_encap (vlib_main_t * vm,
u32 bi0;
vlib_buffer_t *b0;
u32 next0 = VXLAN_GPE_ENCAP_NEXT_IP4_LOOKUP;
- u32 sw_if_index0, len0;
- vnet_hw_interface_t *hi0;
- vxlan_gpe_tunnel_t *t0;
- u8 is_ip4_0;
bi0 = from[0];
to_next[0] = bi0;
@@ -319,16 +331,19 @@ vxlan_gpe_encap (vlib_main_t * vm,
b0 = vlib_get_buffer (vm, bi0);
- /* 1-wide cache? */
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
- hi0 =
- vnet_get_sup_hw_interface (vnm,
- vnet_buffer (b0)->sw_if_index
- [VLIB_TX]);
+ /* get the flag "is_ip4" */
+ if (sw_if_index0 != vnet_buffer (b0)->sw_if_index[VLIB_TX])
+ {
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+ hi0 =
+ vnet_get_sup_hw_interface (vnm,
+ vnet_buffer (b0)->sw_if_index
+ [VLIB_TX]);
- t0 = pool_elt_at_index (ngm->tunnels, hi0->dev_instance);
+ t0 = pool_elt_at_index (ngm->tunnels, hi0->dev_instance);
- is_ip4_0 = (t0->flags & VXLAN_GPE_TUNNEL_IS_IPV4);
+ is_ip4_0 = (t0->flags & VXLAN_GPE_TUNNEL_IS_IPV4);
+ }
vxlan_gpe_encap_one_inline (ngm, b0, t0, &next0, is_ip4_0);