vhost removes limit of RX burst size(32 pkts) and supports to make
an best effort to receive pkts.
Cc: yuanhan....@linux.intel.com
Cc: maxime.coque...@redhat.com
Signed-off-by: Zhiyong Yang <zhiyong.y...@intel.com>
Acked-by: Konstantin Ananyev <konstantin.anan...@intel.com>
---
doc/guides/rel_notes/release_17_05.rst | 4 ++++
drivers/net/vhost/rte_eth_vhost.c | 17 +++++++++++++++--
2 files changed, 19 insertions(+), 2 deletions(-)
diff --git a/doc/guides/rel_notes/release_17_05.rst
b/doc/guides/rel_notes/release_17_05.rst
index 0c33f7b..226ecd6 100644
--- a/doc/guides/rel_notes/release_17_05.rst
+++ b/doc/guides/rel_notes/release_17_05.rst
@@ -127,6 +127,10 @@ New Features
performance enhancements viz. configurable TX data ring, Receive
Data Ring, ability to register memory regions.
+* **Kept consistent PMD batching behaviour.**
+
+ Removed the limit of fm10k/i40e/ixgbe TX burst size and vhost RX/TX burst
size in
+ order to support the same policy "make an best effort to RX/TX pkts" for
PMDs.
Resolved Issues
---------------
diff --git a/drivers/net/vhost/rte_eth_vhost.c
b/drivers/net/vhost/rte_eth_vhost.c
index 2a38b19..7f5cd7e 100644
--- a/drivers/net/vhost/rte_eth_vhost.c
+++ b/drivers/net/vhost/rte_eth_vhost.c
@@ -392,6 +392,7 @@ eth_vhost_rx(void *q, struct rte_mbuf **bufs, uint16_t
nb_bufs)
{
struct vhost_queue *r = q;
uint16_t i, nb_rx = 0;
+ uint16_t nb_receive = nb_bufs;
if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
return 0;
@@ -402,8 +403,20 @@ eth_vhost_rx(void *q, struct rte_mbuf **bufs, uint16_t
nb_bufs)
goto out;
/* Dequeue packets from guest TX queue */
- nb_rx = rte_vhost_dequeue_burst(r->vid,
- r->virtqueue_id, r->mb_pool, bufs, nb_bufs);
+ while (nb_receive) {
+ uint16_t nb_pkts;
+ uint16_t num = (uint16_t)RTE_MIN(nb_receive,
+ VHOST_MAX_PKT_BURST);
+
+ nb_pkts = rte_vhost_dequeue_burst(r->vid, r->virtqueue_id,
+ r->mb_pool, &bufs[nb_rx],
+ num);
+
+ nb_rx += nb_pkts;
+ nb_receive -= nb_pkts;
+ if (nb_pkts < num)
+ break;
+ }
r->stats.pkts += nb_rx;
--
2.7.4
