[dpdk-dev] [PATCH] rte_reorder: Allow sequence numbers > 0 as starting point
Gonzalez Monroy, Sergio
sergio.gonzalez.monroy at intel.com
Fri May 29 18:37:40 CEST 2015
On 20/05/2015 12:02, Simon Kagstrom wrote:
> We use sequence numbers from a generator which has potentially started
> long before the receiver. Therefore, the first number will typically
> be > 0. The rte_reorder code will not work in this case, since the
> packet is seen as outside of the buffer.
>
> The patch instead records the first sequence number inserted as the
> starting point.
>
> Signed-off-by: Simon Kagstrom <simon.kagstrom at netinsight.net>
> Signed-off-by: Johan Faltstrom <johan.faltstrom at netinsight.net>
> ---
> lib/librte_reorder/rte_reorder.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/lib/librte_reorder/rte_reorder.c b/lib/librte_reorder/rte_reorder.c
> index dc0e806..4d6449e 100644
> --- a/lib/librte_reorder/rte_reorder.c
> +++ b/lib/librte_reorder/rte_reorder.c
> @@ -73,6 +73,8 @@ struct rte_reorder_buffer {
> unsigned int memsize; /**< memory area size of reorder buffer */
> struct cir_buffer ready_buf; /**< temp buffer for dequeued entries */
> struct cir_buffer order_buf; /**< buffer used to reorder entries */
> +
> + int is_initialized;
> } __rte_cache_aligned;
>
> static void
> @@ -325,6 +327,12 @@ rte_reorder_insert(struct rte_reorder_buffer *b, struct rte_mbuf *mbuf)
> uint32_t offset, position;
> struct cir_buffer *order_buf = &b->order_buf;
>
> + if (!b->is_initialized) {
> + b->min_seqn = mbuf->seqn;
> +
> + b->is_initialized = 1;
> + }
> +
> /*
> * calculate the offset from the head pointer we need to go.
> * The subtraction takes care of the sequence number wrapping.
Acked-by: Sergio Gonzalez Monroy <sergio.gonzalez.monroy at intel.com>
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