diff options
| author |   Zhiyong Yang <zhiyong.yang@intel.com> | 2019-05-21 01:46:35 -0400 |
|---|---|---|
| committer |   Damjan Marion <dmarion@me.com> | 2019-05-21 14:13:48 +0000 |
| commit | d3ebc83af33be72409032e7969dc2dcfc07a9783 (patch) | |
| tree | 896bc90ee352b55c2dc3b524994be046598563d9 | |
| parent | 46cd9fc970e6a17457be497db71c681d3eaa3087 (diff) | |
geneve_input: leverage vlib_get_buffers
vlib_get_buffers helps save 1.4 clocks/pkt from 34.6 to 33.2
clocks/pkt on Skylake.
Change-Id: I741d10d20373f12d30ec8b04ad8c7444ffb42246
Signed-off-by: Zhiyong Yang <zhiyong.yang@intel.com>
| -rw-r--r-- | src/vnet/geneve/decap.c | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/src/vnet/geneve/decap.c b/src/vnet/geneve/decap.c index ac1369d6fd9..e85e25f43ee 100644 --- a/src/vnet/geneve/decap.c +++ b/src/vnet/geneve/decap.c @@ -81,6 +81,7 @@ geneve_input (vlib_main_t * vm, u32 pkts_decapsulated = 0; u32 thread_index = vm->thread_index; u32 stats_sw_if_index, stats_n_packets, stats_n_bytes; + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; if (is_ip4) last_key4.as_u64 = ~0; @@ -89,6 +90,7 @@ geneve_input (vlib_main_t * vm, from = vlib_frame_vector_args (from_frame); n_left_from = from_frame->n_vectors; + vlib_get_buffers (vm, from, bufs, n_left_from); next_index = node->cached_next_index; stats_sw_if_index = node->runtime_data[0]; @@ -117,16 +119,11 @@ geneve_input (vlib_main_t * vm, /* Prefetch next iteration. */ { - vlib_buffer_t *p2, *p3; - - p2 = vlib_get_buffer (vm, from[2]); - p3 = vlib_get_buffer (vm, from[3]); - - vlib_prefetch_buffer_header (p2, LOAD); - vlib_prefetch_buffer_header (p3, LOAD); + vlib_prefetch_buffer_header (b[2], LOAD); + vlib_prefetch_buffer_header (b[3], LOAD); - CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); - CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); + CLIB_PREFETCH (b[2]->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); + CLIB_PREFETCH (b[3]->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); } bi0 = from[0]; @@ -138,8 +135,9 @@ geneve_input (vlib_main_t * vm, n_left_to_next -= 2; n_left_from -= 2; - b0 = vlib_get_buffer (vm, bi0); - b1 = vlib_get_buffer (vm, bi1); + b0 = b[0]; + b1 = b[1]; + b += 2; /* udp leaves current_data pointing at the geneve header */ geneve0 = vlib_buffer_get_current (b0); @@ -563,7 +561,8 @@ geneve_input (vlib_main_t * vm, n_left_from -= 1; n_left_to_next -= 1; - b0 = vlib_get_buffer (vm, bi0); + b0 = b[0]; + b += 1; /* udp leaves current_data pointing at the geneve header */ geneve0 = vlib_buffer_get_current (b0); |