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-rw-r--r--src/vlib/buffer.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/src/vlib/buffer.c b/src/vlib/buffer.c
index a645438640a..17e7d24cb27 100644
--- a/src/vlib/buffer.c
+++ b/src/vlib/buffer.c
@@ -507,8 +507,14 @@ vlib_buffer_chain_append_data_with_alloc (vlib_main_t * vm,
static uword
vlib_buffer_alloc_size (uword ext_hdr_size, uword data_size)
{
- return CLIB_CACHE_LINE_ROUND (ext_hdr_size + sizeof (vlib_buffer_t) +
- data_size);
+ uword alloc_size = ext_hdr_size + sizeof (vlib_buffer_t) + data_size;
+ alloc_size = CLIB_CACHE_LINE_ROUND (alloc_size);
+
+ /* in case when we have even number of cachelines, we add one more for
+ * better cache occupancy */
+ alloc_size |= CLIB_CACHE_LINE_BYTES;
+
+ return alloc_size;
}
u8