Add fixed-size, preallocated pool support

[vpp.git] / src / vlib / buffer_funcs.h

diff --git a/src/vlib/buffer_funcs.h b/src/vlib/buffer_funcs.h
index 72008da..78bf931 100644 (file)
--- a/src/vlib/buffer_funcs.h
+++ b/src/vlib/buffer_funcs.h
@@ -833,7 +833,12 @@ vlib_buffer_init_for_free_list (vlib_buffer_t * dst,
   _(current_length);
   _(flags);
 #undef _
-  ASSERT (dst->total_length_not_including_first_buffer == 0);
+  /* ASSERT (dst->total_length_not_including_first_buffer == 0); */
+  /* total_length_not_including_first_buffer is not in the template anymore
+   * so it may actually not zeroed for some buffers. One option is to
+   * uncomment the line lower (comes at a cost), the other, is to just  not
+   * care */
+  /* dst->total_length_not_including_first_buffer = 0; */
   ASSERT (dst->n_add_refs == 0);
 }
 
@@ -843,18 +848,21 @@ vlib_buffer_add_to_free_list (vlib_main_t * vm,
                              u32 buffer_index, u8 do_init)
 {
   vlib_buffer_t *b;
-  u32 i;
   b = vlib_get_buffer (vm, buffer_index);
   if (PREDICT_TRUE (do_init))
     vlib_buffer_init_for_free_list (b, f);
   vec_add1_aligned (f->buffers, buffer_index, CLIB_CACHE_LINE_BYTES);
 
-  if (vec_len (f->buffers) > 3 * VLIB_FRAME_SIZE)
+  if (vec_len (f->buffers) > 4 * VLIB_FRAME_SIZE)
     {
+      vlib_buffer_free_list_t *mf;
+      mf = vlib_buffer_get_free_list (vlib_mains[0], f->index);
+      clib_spinlock_lock (&mf->global_buffers_lock);
       /* keep last stored buffers, as they are more likely hot in the cache */
-      for (i = 0; i < VLIB_FRAME_SIZE; i++)
-       vm->os_physmem_free (vlib_get_buffer (vm, i));
+      vec_add_aligned (mf->global_buffers, f->buffers, VLIB_FRAME_SIZE,
+                      CLIB_CACHE_LINE_BYTES);
       vec_delete (f->buffers, VLIB_FRAME_SIZE, 0);
+      clib_spinlock_unlock (&mf->global_buffers_lock);
     }
 }