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authorJohn Lo <loj@cisco.com>2017-02-28 16:34:35 -0500
committerDamjan Marion <dmarion.lists@gmail.com>2017-03-02 16:10:40 +0000
commit584282a1d2a283a2aefce6b543da022d95356c4e (patch)
tree2fd1bdde12338207ecdbf6024b18fa0899872530
parent8ab4ccc900d786f65e517d95c1317292e6c66f6c (diff)
Determine pkt type in dpdk-input node using ethertype only (VPP-647)
Remove reliance on DPDK driver provided mbuf packet type in dpdk-input node as some NIC driver provide misleading information. Now using ethertype from the packet itself to determine packet type for next node. Change-Id: Ie7b514a984f9382c29f1a1e3eb423d68f817c064 Signed-off-by: John Lo <loj@cisco.com>
-rw-r--r--src/plugins/dpdk/device/node.c74
1 files changed, 22 insertions, 52 deletions
diff --git a/src/plugins/dpdk/device/node.c b/src/plugins/dpdk/device/node.c
index 8824d78944e..04c416550c6 100644
--- a/src/plugins/dpdk/device/node.c
+++ b/src/plugins/dpdk/device/node.c
@@ -59,10 +59,12 @@ always_inline u32
dpdk_rx_next_from_etype (struct rte_mbuf * mb, vlib_buffer_t * b0)
{
if (PREDICT_TRUE (vlib_buffer_is_ip4 (b0)))
- if (PREDICT_TRUE ((mb->ol_flags & PKT_RX_IP_CKSUM_GOOD) != 0))
- return VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT;
- else
- return VNET_DEVICE_INPUT_NEXT_IP4_INPUT;
+ {
+ if (PREDICT_TRUE ((mb->ol_flags & PKT_RX_IP_CKSUM_GOOD) != 0))
+ return VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT;
+ else
+ return VNET_DEVICE_INPUT_NEXT_IP4_INPUT;
+ }
else if (PREDICT_TRUE (vlib_buffer_is_ip6 (b0)))
return VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
else if (PREDICT_TRUE (vlib_buffer_is_mpls (b0)))
@@ -71,40 +73,6 @@ dpdk_rx_next_from_etype (struct rte_mbuf * mb, vlib_buffer_t * b0)
return VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
}
-always_inline int
-dpdk_mbuf_is_vlan (struct rte_mbuf *mb)
-{
- return (mb->packet_type & RTE_PTYPE_L2_ETHER_VLAN) ==
- RTE_PTYPE_L2_ETHER_VLAN;
-}
-
-always_inline int
-dpdk_mbuf_is_ip4 (struct rte_mbuf *mb)
-{
- return RTE_ETH_IS_IPV4_HDR (mb->packet_type) != 0;
-}
-
-always_inline int
-dpdk_mbuf_is_ip6 (struct rte_mbuf *mb)
-{
- return RTE_ETH_IS_IPV6_HDR (mb->packet_type) != 0;
-}
-
-always_inline u32
-dpdk_rx_next_from_mb (struct rte_mbuf * mb, vlib_buffer_t * b0)
-{
- if (PREDICT_FALSE (dpdk_mbuf_is_vlan (mb)))
- return VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
- else if (PREDICT_TRUE (dpdk_mbuf_is_ip4 (mb)))
- return VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT;
- else if (PREDICT_TRUE (dpdk_mbuf_is_ip6 (mb)))
- return VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
- else if (PREDICT_TRUE (vlib_buffer_is_mpls (b0)))
- return VNET_DEVICE_INPUT_NEXT_MPLS_INPUT;
- else
- return dpdk_rx_next_from_etype (mb, b0);
-}
-
always_inline void
dpdk_rx_error_from_mb (struct rte_mbuf *mb, u32 * next, u8 * error)
{
@@ -146,9 +114,6 @@ dpdk_rx_trace (dpdk_main_t * dm,
if (PREDICT_FALSE (xd->per_interface_next_index != ~0))
next0 = xd->per_interface_next_index;
- else if (PREDICT_TRUE
- ((xd->flags & DPDK_DEVICE_FLAG_PMD_SUPPORTS_PTYPE) != 0))
- next0 = dpdk_rx_next_from_mb (mb, b0);
else
next0 = dpdk_rx_next_from_etype (mb, b0);
@@ -251,6 +216,13 @@ dpdk_prefetch_buffer (struct rte_mbuf *mb)
CLIB_PREFETCH (b, CLIB_CACHE_LINE_BYTES, STORE);
}
+static_always_inline void
+dpdk_prefetch_buffer_data (struct rte_mbuf *mb)
+{
+ vlib_buffer_t *b = vlib_buffer_from_rte_mbuf (mb);
+ CLIB_PREFETCH (b->data, CLIB_CACHE_LINE_BYTES, STORE);
+}
+
/*
* This function is used when there are no worker threads.
* The main thread performs IO and forwards the packets.
@@ -371,16 +343,17 @@ dpdk_device_input (dpdk_main_t * dm, dpdk_device_t * xd,
{
next0 = next1 = next2 = next3 = xd->per_interface_next_index;
}
- else if (PREDICT_TRUE
- ((xd->flags & DPDK_DEVICE_FLAG_PMD_SUPPORTS_PTYPE) != 0))
- {
- next0 = dpdk_rx_next_from_mb (mb0, b0);
- next1 = dpdk_rx_next_from_mb (mb1, b1);
- next2 = dpdk_rx_next_from_mb (mb2, b2);
- next3 = dpdk_rx_next_from_mb (mb3, b3);
- }
else
{
+ /* prefetch packet data for faster access to the ethertype */
+ dpdk_prefetch_buffer_data (xd->rx_vectors[queue_id]
+ [mb_index + 4]);
+ dpdk_prefetch_buffer_data (xd->rx_vectors[queue_id]
+ [mb_index + 5]);
+ dpdk_prefetch_buffer_data (xd->rx_vectors[queue_id]
+ [mb_index + 6]);
+ dpdk_prefetch_buffer_data (xd->rx_vectors[queue_id]
+ [mb_index + 7]);
next0 = dpdk_rx_next_from_etype (mb0, b0);
next1 = dpdk_rx_next_from_etype (mb1, b1);
next2 = dpdk_rx_next_from_etype (mb2, b2);
@@ -499,9 +472,6 @@ dpdk_device_input (dpdk_main_t * dm, dpdk_device_t * xd,
if (PREDICT_FALSE (xd->per_interface_next_index != ~0))
next0 = xd->per_interface_next_index;
- else if (PREDICT_TRUE
- ((xd->flags & DPDK_DEVICE_FLAG_PMD_SUPPORTS_PTYPE) != 0))
- next0 = dpdk_rx_next_from_mb (mb0, b0);
else
next0 = dpdk_rx_next_from_etype (mb0, b0);