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netdev-dpdk: Do not flush tx queue which is shared among CPUs since it is always flushed

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When tx queue is shared among CPUS,the pkts always be flush
in 'netdev_dpdk_eth_send'. So it is unnecessarily for flushing
in netdev_dpdk_rxq_recv Otherwise tx will be accessed without
locking.

Signed-off-by: Wei li <liw@dtdream.com>
Acked-by: Daniele Di Proietto <diproiettod@vmware.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
This commit is contained in:
Wei li
2015-06-25 02:45:08 -07:00
committed by Pravin B Shelar
parent 9ad11dbe4c
commit dc6ba5dc8b
1 changed files with 5 additions and 2 deletions
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7
lib/netdev-dpdk.c
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@@ -928,8 +928,11 @@ netdev_dpdk_rxq_recv(struct netdev_rxq *rxq_, struct dp_packet **packets,
int nb_rx;
/* There is only one tx queue for this core. Do not flush other
* queueus. */
if (rxq_->queue_id == rte_lcore_id()) {
* queues.
* Do not flush tx queue which is shared among CPUs
* since it is always flushed */
if (rxq_->queue_id == rte_lcore_id() &&
OVS_LIKELY(!dev->txq_needs_locking)) {
dpdk_queue_flush(dev, rxq_->queue_id);
}