diff options
| -rw-r--r-- | src/vlib/buffer.c | 19 | ||||
| -rw-r--r-- | src/vlib/buffer.h | 6 | ||||
| -rw-r--r-- | src/vlib/buffer_funcs.h | 11 |
3 files changed, 32 insertions, 4 deletions
diff --git a/src/vlib/buffer.c b/src/vlib/buffer.c index a5c955c7..908368c0 100644 --- a/src/vlib/buffer.c +++ b/src/vlib/buffer.c @@ -396,6 +396,8 @@ vlib_buffer_create_free_list_helper (vlib_main_t * vm, hash_set (bm->free_list_by_size, f->n_data_bytes, f->index); } + clib_spinlock_init (&f->global_buffers_lock); + for (i = 1; i < vec_len (vlib_mains); i++) { vlib_buffer_main_t *wbm = vlib_mains[i]->buffer_main; @@ -509,6 +511,7 @@ fill_free_list (vlib_main_t * vm, vlib_buffer_free_list_t * fl, uword min_free_buffers) { vlib_buffer_t *buffers, *b; + vlib_buffer_free_list_t *mfl; int n, n_bytes, i; u32 *bi; u32 n_remaining, n_alloc, n_this_chunk; @@ -518,6 +521,22 @@ fill_free_list (vlib_main_t * vm, if (n <= 0) return min_free_buffers; + mfl = vlib_buffer_get_free_list (vlib_mains[0], fl->index); + if (vec_len (mfl->global_buffers) > 0) + { + int n_copy, n_left; + clib_spinlock_lock (&mfl->global_buffers_lock); + n_copy = clib_min (vec_len (mfl->global_buffers), n); + n_left = vec_len (mfl->global_buffers) - n_copy; + vec_add_aligned (fl->buffers, mfl->global_buffers + n_left, n_copy, + CLIB_CACHE_LINE_BYTES); + _vec_len (mfl->global_buffers) = n_left; + clib_spinlock_unlock (&mfl->global_buffers_lock); + 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, CLIB_CACHE_LINE_BYTES / sizeof (u32)); diff --git a/src/vlib/buffer.h b/src/vlib/buffer.h index 9047ca9a..5504bf7c 100644 --- a/src/vlib/buffer.h +++ b/src/vlib/buffer.h @@ -350,6 +350,12 @@ typedef struct vlib_buffer_free_list_t /* Vector of free buffers. Each element is a byte offset into I/O heap. */ u32 *buffers; + /* global vector of free buffers, used only on main thread. + Bufers are returned to global buffers only in case when number of + buffers on free buffers list grows about threshold */ + u32 *global_buffers; + clib_spinlock_t global_buffers_lock; + /* Memory chunks allocated for this free list recorded here so they can be freed when free list is deleted. */ diff --git a/src/vlib/buffer_funcs.h b/src/vlib/buffer_funcs.h index 6a662416..78bf9317 100644 --- a/src/vlib/buffer_funcs.h +++ b/src/vlib/buffer_funcs.h @@ -848,18 +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); } } |