diff options
| author |   Eyal Bari <ebari@cisco.com> | 2017-06-13 08:42:35 +0300 |
|---|---|---|
| committer |   John Lo <loj@cisco.com> | 2017-07-07 16:40:01 +0000 |
| commit | 9a1ae1ac76ca43e799e8281da1177c186e49d4f7 (patch) | |
| tree | 5c7281da8e879e66826f81ed91c8a83738c0b555 | |
| parent | 7968e6cad5fac28568162945e2e57556740013fd (diff) | |
ETH:optimized double is_tagged check
a double version of is_tagged, uses "free lanes" in _mm_cmpeq_epi16
to check a second tag
this code was not yet tested for performance
Change-Id: I640017e1cc75c85a33d196ee911a7e4a512d9849
Signed-off-by: Eyal Bari <ebari@cisco.com>
| -rwxr-xr-x | src/vnet/ethernet/node.c | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/src/vnet/ethernet/node.c b/src/vnet/ethernet/node.c index 4529ca6a572..ce5b2c5bea7 100755 --- a/src/vnet/ethernet/node.c +++ b/src/vnet/ethernet/node.c @@ -285,6 +285,29 @@ determine_next_node (ethernet_main_t * em, } } +static_always_inline int +ethernet_frame_is_any_tagged (u16 type0, u16 type1) +{ +#if __SSE4_2__ + const __m128i ethertype_mask = _mm_set_epi16 (ETHERNET_TYPE_VLAN, + ETHERNET_TYPE_DOT1AD, + ETHERNET_TYPE_VLAN_9100, + ETHERNET_TYPE_VLAN_9200, + /* duplicate for type1 */ + ETHERNET_TYPE_VLAN, + ETHERNET_TYPE_DOT1AD, + ETHERNET_TYPE_VLAN_9100, + ETHERNET_TYPE_VLAN_9200); + + __m128i r = + _mm_set_epi16 (type0, type0, type0, type0, type1, type1, type1, type1); + r = _mm_cmpeq_epi16 (ethertype_mask, r); + return !_mm_test_all_zeros (r, r); +#else + return ethernet_frame_is_tagged (type0) || ethernet_frame_istagged (type1); +#endif +} + static_always_inline uword ethernet_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node, @@ -377,8 +400,7 @@ ethernet_input_inline (vlib_main_t * vm, /* Speed-path for the untagged case */ if (PREDICT_TRUE (variant == ETHERNET_INPUT_VARIANT_ETHERNET - && !ethernet_frame_is_tagged (type0) - && !ethernet_frame_is_tagged (type1))) + && !ethernet_frame_is_any_tagged (type0, type1))) { main_intf_t *intf0; subint_config_t *subint0; |