[PATCH 5/5] net/vhost: remove limit of vhost RX burst size
From: Zhiyong Yang <hidden>
Date: 2017-02-24 08:48:31
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
vhost removes limit of RX burst size(32 pkts) and supports to make an best effort to receive pkts. Cc: yuanhan.liu@linux.intel.com Cc: maxime.coquelin@redhat.com Signed-off-by: Zhiyong Yang <redacted> --- drivers/net/vhost/rte_eth_vhost.c | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-)
diff --git a/drivers/net/vhost/rte_eth_vhost.c b/drivers/net/vhost/rte_eth_vhost.c
index 1e1fa34..8a97c2a 100644
--- a/drivers/net/vhost/rte_eth_vhost.c
+++ b/drivers/net/vhost/rte_eth_vhost.c@@ -402,9 +402,28 @@ 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); + if (likely(nb_bufs <= VHOST_MAX_PKT_BURST)) + nb_rx = rte_vhost_dequeue_burst(r->vid, r->virtqueue_id, + r->mb_pool, bufs, nb_bufs); + else { + uint16_t nb_receive = 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; for (i = 0; likely(i < nb_rx); i++) {
--
2.7.4