diff options
| author |   Damjan Marion <damarion@cisco.com> | 2018-10-31 10:59:02 +0100 |
|---|---|---|
| committer |   Marco Varlese <marco.varlese@suse.de> | 2018-11-02 08:54:02 +0000 |
| commit | bd0da97e5ac0f84e1ea8e6e7f9549dd4e1a6a4ab (patch) | |
| tree | 246454ea45763bdca40b608cc89735ad23dcd00a /src/vlib/buffer.h | |
| parent | 93468adfc4c5a449532fbfecd575f17d9cae7099 (diff) | |
vlib: define minimum chained buffer segment size
Change-Id: I9b5f7b264f9978e3dd97b2d1eb103b7d10ac3170
Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vlib/buffer.h')
| -rw-r--r-- | src/vlib/buffer.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/vlib/buffer.h b/src/vlib/buffer.h index f9750ecf3e1..99f40e840a5 100644 --- a/src/vlib/buffer.h +++ b/src/vlib/buffer.h @@ -51,6 +51,14 @@ #define VLIB_BUFFER_DATA_SIZE (2048) #define VLIB_BUFFER_PRE_DATA_SIZE __PRE_DATA_SIZE +/* Minimum buffer chain segment size. Does not apply to last buffer in chain. + Dataplane code can safely asume that specified amount of data is not split + into 2 chained buffers */ +#define VLIB_BUFFER_MIN_CHAIN_SEG_SIZE (128) + +/* Amount of head buffer data copied to each replica head buffer */ +#define VLIB_BUFFER_CLONE_HEAD_SIZE (256) + typedef u8 vlib_buffer_free_list_index_t; /** \file @@ -224,6 +232,9 @@ vlib_buffer_advance (vlib_buffer_t * b, word l) ASSERT (b->current_length >= l); b->current_data += l; b->current_length -= l; + + ASSERT ((b->flags & VLIB_BUFFER_NEXT_PRESENT) == 0 || + b->current_length >= VLIB_BUFFER_MIN_CHAIN_SEG_SIZE); } /** \brief Check if there is enough space in buffer to advance |