| From b002b56c0c8a1790549c23d93f3d57ffc212c6da Mon Sep 17 00:00:00 2001 |
| From: Pierre Pfister <ppfister@cisco.com> |
| Date: Tue, 8 Nov 2016 10:24:48 +0100 |
| Subject: [PATCH] virtio: tx with can_push when VERSION_1 is set |
| |
| Current virtio driver advertises VERSION_1 support, |
| but does not handle device's VERSION_1 support when |
| sending packets (it looks for ANY_LAYOUT feature, |
| which is absent). |
| |
| This patch enables 'can_push' in tx path when VERSION_1 |
| is advertised by the device. |
| |
| This significantly improves small packets forwarding rate |
| towards devices advertising VERSION_1 feature. |
| |
| Signed-off-by: Pierre Pfister <ppfister@cisco.com> |
| --- |
| drivers/net/virtio/virtio_rxtx.c | 3 ++- |
| 1 file changed, 2 insertions(+), 1 deletion(-) |
| |
| diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c |
| index 22d97a4..1e5a6b9 100644 |
| --- a/drivers/net/virtio/virtio_rxtx.c |
| +++ b/drivers/net/virtio/virtio_rxtx.c |
| @@ -1015,7 +1015,8 @@ virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) |
| } |
| |
| /* optimize ring usage */ |
| - if (vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) && |
| + if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) || |
| + vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) && |
| rte_mbuf_refcnt_read(txm) == 1 && |
| RTE_MBUF_DIRECT(txm) && |
| txm->nb_segs == 1 && |
| -- |
| 2.7.4 (Apple Git-66) |
| |