From 7cd1dbf4fff0e612673594e7055fe25724a148bb Mon Sep 17 00:00:00 2001 From: Zhiyong Yang Date: Wed, 29 Mar 2017 15:16:15 +0800 Subject: [PATCH] net/vhost: remove limit of vhost Tx burst size vhost removes limit of Tx burst size(32 pkts) and supports to make an best effort to transmit pkts. Cc: yuanhan.liu@linux.intel.com Cc: maxime.coquelin@redhat.com Signed-off-by: Zhiyong Yang Acked-by: Konstantin Ananyev --- drivers/net/vhost/rte_eth_vhost.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/drivers/net/vhost/rte_eth_vhost.c b/drivers/net/vhost/rte_eth_vhost.c index abe91c7738..2a38b194f1 100644 --- a/drivers/net/vhost/rte_eth_vhost.c +++ b/drivers/net/vhost/rte_eth_vhost.c @@ -52,6 +52,7 @@ #define ETH_VHOST_QUEUES_ARG "queues" #define ETH_VHOST_CLIENT_ARG "client" #define ETH_VHOST_DEQUEUE_ZERO_COPY "dequeue-zero-copy" +#define VHOST_MAX_PKT_BURST 32 static const char *valid_arguments[] = { ETH_VHOST_IFACE_ARG, @@ -424,6 +425,7 @@ eth_vhost_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs) { struct vhost_queue *r = q; uint16_t i, nb_tx = 0; + uint16_t nb_send = nb_bufs; if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0)) return 0; @@ -434,8 +436,19 @@ eth_vhost_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs) goto out; /* Enqueue packets to guest RX queue */ - nb_tx = rte_vhost_enqueue_burst(r->vid, - r->virtqueue_id, bufs, nb_bufs); + while (nb_send) { + uint16_t nb_pkts; + uint16_t num = (uint16_t)RTE_MIN(nb_send, + VHOST_MAX_PKT_BURST); + + nb_pkts = rte_vhost_enqueue_burst(r->vid, r->virtqueue_id, + &bufs[nb_tx], num); + + nb_tx += nb_pkts; + nb_send -= nb_pkts; + if (nb_pkts < num) + break; + } r->stats.pkts += nb_tx; r->stats.missed_pkts += nb_bufs - nb_tx; -- 2.20.1