}
}
-#define BUFFERS_PER_COPY (sizeof (vlib_copy_unit_t) / sizeof (u32))
-
-/* Make sure we have at least given number of unaligned buffers. */
-static void
-fill_unaligned (vlib_main_t * vm,
- vlib_buffer_free_list_t * free_list,
- uword n_unaligned_buffers)
-{
- word la = vec_len (free_list->aligned_buffers);
- word lu = vec_len (free_list->unaligned_buffers);
-
- /* Aligned come in aligned copy-sized chunks. */
- ASSERT (la % BUFFERS_PER_COPY == 0);
-
- ASSERT (la >= n_unaligned_buffers);
-
- while (lu < n_unaligned_buffers)
- {
- /* Copy 4 buffers from end of aligned vector to unaligned vector. */
- vec_add (free_list->unaligned_buffers,
- free_list->aligned_buffers + la - BUFFERS_PER_COPY,
- BUFFERS_PER_COPY);
- la -= BUFFERS_PER_COPY;
- lu += BUFFERS_PER_COPY;
- }
- _vec_len (free_list->aligned_buffers) = la;
-}
-
-/* After free aligned buffers may not contain even sized chunks. */
-static void
-trim_aligned (vlib_buffer_free_list_t * f)
-{
- uword l, n_trim;
-
- /* Add unaligned to aligned before trim. */
- l = vec_len (f->unaligned_buffers);
- if (l > 0)
- {
- vec_add_aligned (f->aligned_buffers, f->unaligned_buffers, l,
- /* align */ sizeof (vlib_copy_unit_t));
-
- _vec_len (f->unaligned_buffers) = 0;
- }
-
- /* Remove unaligned buffers from end of aligned vector and save for next trim. */
- l = vec_len (f->aligned_buffers);
- n_trim = l % BUFFERS_PER_COPY;
- if (n_trim)
- {
- /* Trim aligned -> unaligned. */
- vec_add (f->unaligned_buffers, f->aligned_buffers + l - n_trim, n_trim);
-
- /* Remove from aligned. */
- _vec_len (f->aligned_buffers) = l - n_trim;
- }
-}
-
-static void
-merge_free_lists (vlib_buffer_free_list_t * dst,
- vlib_buffer_free_list_t * src)
+void
+vlib_buffer_merge_free_lists (vlib_buffer_free_list_t * dst,
+ vlib_buffer_free_list_t * src)
{
uword l;
u32 *d;
- trim_aligned (src);
- trim_aligned (dst);
-
- l = vec_len (src->aligned_buffers);
+ l = vec_len (src->buffers);
if (l > 0)
{
- vec_add2_aligned (dst->aligned_buffers, d, l,
- /* align */ sizeof (vlib_copy_unit_t));
- clib_memcpy (d, src->aligned_buffers, l * sizeof (d[0]));
- vec_free (src->aligned_buffers);
- }
-
- l = vec_len (src->unaligned_buffers);
- if (l > 0)
- {
- vec_add (dst->unaligned_buffers, src->unaligned_buffers, l);
- vec_free (src->unaligned_buffers);
+ vec_add2_aligned (dst->buffers, d, l, CLIB_CACHE_LINE_BYTES);
+ clib_memcpy (d, src->buffers, l * sizeof (d[0]));
+ vec_free (src->buffers);
}
}
-always_inline u32
-vlib_buffer_get_free_list_with_size (vlib_main_t * vm, u32 size)
-{
- vlib_buffer_main_t *bm = vm->buffer_main;
-
- size = vlib_buffer_round_size (size);
- uword *p = hash_get (bm->free_list_by_size, size);
- return p ? p[0] : ~0;
-}
-
/* Add buffer free list. */
static u32
vlib_buffer_create_free_list_helper (vlib_main_t * vm,
ASSERT (f - bm->buffer_free_list_pool ==
wf - wbm->buffer_free_list_pool);
wf[0] = f[0];
- wf->aligned_buffers = 0;
- wf->unaligned_buffers = 0;
+ wf->buffers = 0;
wf->n_alloc = 0;
}
vm->os_physmem_free (f->buffer_memory_allocated[i]);
vec_free (f->name);
vec_free (f->buffer_memory_allocated);
- vec_free (f->unaligned_buffers);
- vec_free (f->aligned_buffers);
+ vec_free (f->buffers);
}
/* Add buffer free list. */
f = vlib_buffer_get_free_list (vm, free_list_index);
- ASSERT (vec_len (f->unaligned_buffers) + vec_len (f->aligned_buffers) ==
- f->n_alloc);
+ ASSERT (vec_len (f->buffers) == f->n_alloc);
merge_index = vlib_buffer_get_free_list_with_size (vm, f->n_data_bytes);
if (merge_index != ~0 && merge_index != free_list_index)
{
- merge_free_lists (pool_elt_at_index (bm->buffer_free_list_pool,
- merge_index), f);
+ vlib_buffer_merge_free_lists (pool_elt_at_index
+ (bm->buffer_free_list_pool, merge_index),
+ f);
}
del_free_list (vm, f);
u32 *bi;
u32 n_remaining, n_alloc, n_this_chunk;
- trim_aligned (fl);
-
/* Already have enough free buffers on free list? */
- n = min_free_buffers - vec_len (fl->aligned_buffers);
+ n = min_free_buffers - vec_len (fl->buffers);
if (n <= 0)
return min_free_buffers;
/* Always allocate round number of buffers. */
- n = round_pow2 (n, BUFFERS_PER_COPY);
+ n = round_pow2 (n, CLIB_CACHE_LINE_BYTES / sizeof (u32));
/* Always allocate new buffers in reasonably large sized chunks. */
n = clib_max (n, fl->min_n_buffers_each_physmem_alloc);
n_remaining -= n_this_chunk;
b = buffers;
- vec_add2_aligned (fl->aligned_buffers, bi, n_this_chunk,
- sizeof (vlib_copy_unit_t));
+ vec_add2_aligned (fl->buffers, bi, n_this_chunk, CLIB_CACHE_LINE_BYTES);
for (i = 0; i < n_this_chunk; i++)
{
bi[i] = vlib_get_buffer_index (vm, b);
return n_alloc;
}
-always_inline uword
-copy_alignment (u32 * x)
-{
- return (pointer_to_uword (x) / sizeof (x[0])) % BUFFERS_PER_COPY;
-}
-
-
static u32
alloc_from_free_list (vlib_main_t * vm,
vlib_buffer_free_list_t * free_list,
u32 * alloc_buffers, u32 n_alloc_buffers)
{
- u32 *dst, *u_src;
- uword u_len, n_left;
- uword n_unaligned_start, n_unaligned_end, n_filled;
+ u32 *dst, *src;
+ uword len;
+ uword n_filled;
- n_left = n_alloc_buffers;
dst = alloc_buffers;
- n_unaligned_start = ((BUFFERS_PER_COPY - copy_alignment (dst))
- & (BUFFERS_PER_COPY - 1));
n_filled = fill_free_list (vm, free_list, n_alloc_buffers);
if (n_filled == 0)
return 0;
- n_left = n_filled < n_left ? n_filled : n_left;
- n_alloc_buffers = n_left;
-
- if (n_unaligned_start >= n_left)
- {
- n_unaligned_start = n_left;
- n_unaligned_end = 0;
- }
- else
- n_unaligned_end = copy_alignment (dst + n_alloc_buffers);
+ len = vec_len (free_list->buffers);
+ ASSERT (len >= n_alloc_buffers);
- fill_unaligned (vm, free_list, n_unaligned_start + n_unaligned_end);
+ src = free_list->buffers + len - n_alloc_buffers;
+ clib_memcpy (dst, src, n_alloc_buffers * sizeof (u32));
- u_len = vec_len (free_list->unaligned_buffers);
- u_src = free_list->unaligned_buffers + u_len - 1;
-
- if (n_unaligned_start)
- {
- uword n_copy = n_unaligned_start;
- if (n_copy > n_left)
- n_copy = n_left;
- n_left -= n_copy;
-
- while (n_copy > 0)
- {
- *dst++ = *u_src--;
- n_copy--;
- u_len--;
- }
-
- /* Now dst should be aligned. */
- if (n_left > 0)
- ASSERT (pointer_to_uword (dst) % sizeof (vlib_copy_unit_t) == 0);
- }
-
- /* Aligned copy. */
- {
- vlib_copy_unit_t *d, *s;
- uword n_copy;
-
- if (vec_len (free_list->aligned_buffers) <
- ((n_left / BUFFERS_PER_COPY) * BUFFERS_PER_COPY))
- abort ();
-
- n_copy = n_left / BUFFERS_PER_COPY;
- n_left = n_left % BUFFERS_PER_COPY;
-
- /* Remove buffers from aligned free list. */
- _vec_len (free_list->aligned_buffers) -= n_copy * BUFFERS_PER_COPY;
-
- s = (vlib_copy_unit_t *) vec_end (free_list->aligned_buffers);
- d = (vlib_copy_unit_t *) dst;
-
- /* Fast path loop. */
- while (n_copy >= 4)
- {
- d[0] = s[0];
- d[1] = s[1];
- d[2] = s[2];
- d[3] = s[3];
- n_copy -= 4;
- s += 4;
- d += 4;
- }
-
- while (n_copy >= 1)
- {
- d[0] = s[0];
- n_copy -= 1;
- s += 1;
- d += 1;
- }
-
- dst = (void *) d;
- }
-
- /* Unaligned copy. */
- ASSERT (n_unaligned_end == n_left);
- while (n_left > 0)
- {
- *dst++ = *u_src--;
- n_left--;
- u_len--;
- }
-
- if (!free_list->unaligned_buffers)
- ASSERT (u_len == 0);
- else
- _vec_len (free_list->unaligned_buffers) = u_len;
+ _vec_len (free_list->buffers) -= n_alloc_buffers;
/* Verify that buffers are known free. */
vlib_buffer_validate_alloc_free (vm, alloc_buffers,
return alloc_from_free_list (vm, f, buffers, n_buffers);
}
-always_inline void
-add_buffer_to_free_list (vlib_main_t * vm,
- vlib_buffer_free_list_t * f,
- u32 buffer_index, u8 do_init)
-{
- vlib_buffer_t *b;
- b = vlib_get_buffer (vm, buffer_index);
- if (PREDICT_TRUE (do_init))
- vlib_buffer_init_for_free_list (b, f);
- vec_add1_aligned (f->aligned_buffers, buffer_index,
- sizeof (vlib_copy_unit_t));
-}
-
-always_inline vlib_buffer_free_list_t *
-buffer_get_free_list (vlib_main_t * vm, vlib_buffer_t * b, u32 * index)
-{
- vlib_buffer_main_t *bm = vm->buffer_main;
- u32 i;
-
- *index = i = b->free_list_index;
- return pool_elt_at_index (bm->buffer_free_list_pool, i);
-}
-
void *
vlib_set_buffer_free_callback (vlib_main_t * vm, void *fp)
{
vlib_buffer_t *b0;
b0 = vlib_get_buffer (vm, bi0);
- fl = buffer_get_free_list (vm, b0, &fi);
+ fl = vlib_buffer_get_buffer_free_list (vm, b0, &fi);
if (fl->buffers_added_to_freelist_function)
vec_add1 (announce_list, fl);
}
vlib_buffer_validate_alloc_free (vm, b,
n_left, VLIB_BUFFER_KNOWN_ALLOCATED);
- vec_add2_aligned (fl->aligned_buffers, f, n_left,
- /* align */ sizeof (vlib_copy_unit_t));
+ vec_add2_aligned (fl->buffers, f, n_left, CLIB_CACHE_LINE_BYTES);
n = next_to_free[i_next_to_free];
while (n_left >= 4)
f -= 2;
n -= free_next0 + free_next1;
- _vec_len (fl->aligned_buffers) = f - fl->aligned_buffers;
+ _vec_len (fl->buffers) = f - fl->buffers;
fl0 = pool_elt_at_index (bm->buffer_free_list_pool, fi0);
fl1 = pool_elt_at_index (bm->buffer_free_list_pool, fi1);
- add_buffer_to_free_list (vm, fl0, bi0, free0);
+ vlib_buffer_add_to_free_list (vm, fl0, bi0, free0);
if (PREDICT_FALSE (fl0->buffers_added_to_freelist_function != 0))
{
int i;
}
no_fl1:
- add_buffer_to_free_list (vm, fl1, bi1, free1);
+ vlib_buffer_add_to_free_list (vm, fl1, bi1, free1);
/* Possibly change current free list. */
if (fi0 != fi && fi1 != fi)
fl = pool_elt_at_index (bm->buffer_free_list_pool, fi);
}
- vec_add2_aligned (fl->aligned_buffers, f, n_left,
- /* align */ sizeof (vlib_copy_unit_t));
+ vec_add2_aligned (fl->buffers, f, n_left, CLIB_CACHE_LINE_BYTES);
}
while (n_left >= 1)
f -= 1;
n -= free_next0;
- _vec_len (fl->aligned_buffers) = f - fl->aligned_buffers;
+ _vec_len (fl->buffers) = f - fl->buffers;
fl0 = pool_elt_at_index (bm->buffer_free_list_pool, fi0);
- add_buffer_to_free_list (vm, fl0, bi0, free0);
+ vlib_buffer_add_to_free_list (vm, fl0, bi0, free0);
if (PREDICT_FALSE (fl0->buffers_added_to_freelist_function != 0))
{
int i;
fi = fi0;
fl = pool_elt_at_index (bm->buffer_free_list_pool, fi);
- vec_add2_aligned (fl->aligned_buffers, f, n_left,
- /* align */ sizeof (vlib_copy_unit_t));
+ vec_add2_aligned (fl->buffers, f, n_left, CLIB_CACHE_LINE_BYTES);
}
if (follow_buffer_next && ((n_left = n - next_to_free[i_next_to_free]) > 0))
goto again;
}
- _vec_len (fl->aligned_buffers) = f - fl->aligned_buffers;
+ _vec_len (fl->buffers) = f - fl->buffers;
if (vec_len (announce_list))
{
"#Alloc", "#Free");
size = sizeof (vlib_buffer_t) + f->n_data_bytes;
- n_free = vec_len (f->aligned_buffers) + vec_len (f->unaligned_buffers);
+ n_free = vec_len (f->buffers);
bytes_alloc = size * f->n_alloc;
bytes_free = size * n_free;
Code Review / vpp.git / blobdiff