diff options
| author |   Zhiyong Yang <zhiyong.yang@intel.com> | 2019-04-22 00:18:38 -0400 |
|---|---|---|
| committer |   Damjan Marion <dmarion@me.com> | 2019-04-23 07:13:19 +0000 |
| commit | f92211672646dccdaf50ec7cea9197e15dca03ed (patch) | |
| tree | 99211e9dc4db86cf26fe91edbedd9cf83644b307 | |
| parent | 7f4fd22f2f56b2b4620139d377e8db0976a2ae3b (diff) | |
ipsec4-output: add pkt header and data prefetching
The graph node running IPsec encap in tunnel mode can be saved
from 65.8 to 57.3 clocks/pkt on Haswell platform.
The graph node can be saved 10 clockes/pkt on DVN as well in the
same case.
Change-Id: I4804879c4d489465ee56a8f8317596b7e79b9331
Signed-off-by: Zhiyong Yang <zhiyong.yang@intel.com>
| -rw-r--r-- | src/vnet/ipsec/ipsec_output.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/vnet/ipsec/ipsec_output.c b/src/vnet/ipsec/ipsec_output.c index 83ab629453d..47eeb46d659 100644 --- a/src/vnet/ipsec/ipsec_output.c +++ b/src/vnet/ipsec/ipsec_output.c @@ -194,8 +194,8 @@ ipsec_output_inline (vlib_main_t * vm, vlib_node_runtime_t * node, while (n_left_from > 0) { - u32 bi0, pi0; - vlib_buffer_t *b0; + u32 bi0, pi0, bi1; + vlib_buffer_t *b0, *b1; ipsec_policy_t *p0; ip4_header_t *ip0; ip6_header_t *ip6_0 = 0; @@ -205,11 +205,18 @@ ipsec_output_inline (vlib_main_t * vm, vlib_node_runtime_t * node, u64 bytes0; bi0 = from[0]; + bi1 = from[1]; b0 = vlib_get_buffer (vm, bi0); + b1 = vlib_get_buffer (vm, bi1); sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX]; iph_offset = vnet_buffer (b0)->ip.save_rewrite_length; ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + iph_offset); + if (n_left_from > 1) + { + CLIB_PREFETCH (b1, CLIB_CACHE_LINE_BYTES * 2, STORE); + vlib_prefetch_buffer_data (b1, LOAD); + } /* lookup for SPD only if sw_if_index is changed */ if (PREDICT_FALSE (last_sw_if_index != sw_if_index0)) |