buffers: bring back cache occupancy improvement

[vpp.git] / src / vlib / buffer.c

diff --git a/src/vlib/buffer.c b/src/vlib/buffer.c
index 82fe641..b5200ba 100644 (file)
--- a/src/vlib/buffer.c
+++ b/src/vlib/buffer.c
@@ -473,6 +473,10 @@ vlib_buffer_alloc_size (uword ext_hdr_size, uword data_size)
   uword alloc_size = ext_hdr_size + sizeof (vlib_buffer_t) + data_size;
   alloc_size = round_pow2 (alloc_size, VLIB_BUFFER_ALIGN);
 
+  /* in case when we have even number of 'cachelines', we add one more for
+   * better cache occupancy */
+  alloc_size |= VLIB_BUFFER_ALIGN;
+
   return alloc_size;
 }