865d6ba8a3
This patch for dpdk 16.11 enables the use of shallow virtio descriptors when VERSION_1 is set. More info on DPDK patchwork: http://dpdk.org/dev/patchwork/patch/17340/ Change-Id: I28cde77ed5a3588921d00da50678debfe0338b08 Signed-off-by: Pierre Pfister <ppfister@cisco.com>
39 lines
1.3 KiB
Diff
39 lines
1.3 KiB
Diff
From b002b56c0c8a1790549c23d93f3d57ffc212c6da Mon Sep 17 00:00:00 2001
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From: Pierre Pfister <ppfister@cisco.com>
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Date: Tue, 8 Nov 2016 10:24:48 +0100
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Subject: [PATCH] virtio: tx with can_push when VERSION_1 is set
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Current virtio driver advertises VERSION_1 support,
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but does not handle device's VERSION_1 support when
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sending packets (it looks for ANY_LAYOUT feature,
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which is absent).
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This patch enables 'can_push' in tx path when VERSION_1
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is advertised by the device.
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This significantly improves small packets forwarding rate
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towards devices advertising VERSION_1 feature.
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Signed-off-by: Pierre Pfister <ppfister@cisco.com>
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---
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drivers/net/virtio/virtio_rxtx.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c
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index 22d97a4..1e5a6b9 100644
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--- a/drivers/net/virtio/virtio_rxtx.c
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+++ b/drivers/net/virtio/virtio_rxtx.c
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@@ -1015,7 +1015,8 @@ virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
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}
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/* optimize ring usage */
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- if (vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) &&
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+ if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) ||
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+ vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) &&
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rte_mbuf_refcnt_read(txm) == 1 &&
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RTE_MBUF_DIRECT(txm) &&
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txm->nb_segs == 1 &&
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--
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2.7.4 (Apple Git-66)
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