From: "Pierre Pfister (ppfister)" <ppfister@cisco.com>
To: "dev@dpdk.org" <dev@dpdk.org>
Cc: Yuanhan Liu <yuanhan.liu@linux.intel.com>,
Maxime Coquelin <maxime.coquelin@redhat.com>
Subject: [dpdk-dev] [PATCH v2] virtio: tx with can_push when VERSION_1 is set
Date: Wed, 30 Nov 2016 09:18:42 +0000 [thread overview]
Message-ID: <C1042323-AA70-46AF-B4D2-24A470ED8DB9@cisco.com> (raw)
In-Reply-To: <6D3BD8A2-1567-42FA-9672-EE682D827A84@cisco.com>
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)
next prev parent reply other threads:[~2016-11-30 9:18 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-08 9:31 [dpdk-dev] [PATCH] " Pierre Pfister (ppfister)
2016-11-08 9:44 ` Maxime Coquelin
2016-11-09 12:42 ` Pierre Pfister (ppfister)
2016-11-09 14:42 ` Maxime Coquelin
2016-11-09 14:51 ` Maxime Coquelin
2016-11-22 9:54 ` Pierre Pfister (ppfister)
2016-11-22 13:17 ` Maxime Coquelin
2016-11-30 9:09 ` Pierre Pfister (ppfister)
2016-11-30 9:18 ` Pierre Pfister (ppfister) [this message]
2016-11-30 10:19 ` [dpdk-dev] [PATCH v2] " Yuanhan Liu
2016-12-07 9:42 ` Yuanhan Liu
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