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authorDave Barach <dave@barachs.net>2016-06-09 08:39:47 -0400
committerDamjan Marion <damarion@cisco.com>2016-06-09 13:41:58 +0000
commit3f3b085c8e1ca12f3325a06d4378e74c120ff038 (patch)
treed66b57f6332699b268fa783137b382824e3398c1
parent55ef1b1f8035b4ade23e5a0c4923ca491a26bdc2 (diff)
VPP-106: fix performance hit due to unprefetched data read
Change-Id: I1325b60b6deadcb51631e178011a31ee70c06cc7 Signed-off-by: Dave Barach <dave@barachs.net>
-rw-r--r--dpdk/dpdk-16.04_patches/0017-i40e-Set-PKT_RX_VLAN_PKT-flag-for-VLAN-packets.patch41
-rw-r--r--vnet/vnet/devices/dpdk/device.c16
-rw-r--r--vnet/vnet/devices/dpdk/dpdk.h3
-rw-r--r--vnet/vnet/devices/dpdk/node.c4
4 files changed, 17 insertions, 47 deletions
diff --git a/dpdk/dpdk-16.04_patches/0017-i40e-Set-PKT_RX_VLAN_PKT-flag-for-VLAN-packets.patch b/dpdk/dpdk-16.04_patches/0017-i40e-Set-PKT_RX_VLAN_PKT-flag-for-VLAN-packets.patch
deleted file mode 100644
index a40b537fa5b..00000000000
--- a/dpdk/dpdk-16.04_patches/0017-i40e-Set-PKT_RX_VLAN_PKT-flag-for-VLAN-packets.patch
+++ /dev/null
@@ -1,41 +0,0 @@
-From 2c75df63533e1eaa97c24f41bbd6a5b131ff52ce Mon Sep 17 00:00:00 2001
-From: Georgi Savov <gsavov@cisco.com>
-Date: Tue, 10 May 2016 10:59:55 -0400
-Subject: [PATCH 17/17] i40e Set PKT_RX_VLAN_PKT flag for VLAN packets
-
----
- drivers/net/i40e/i40e_rxtx.c | 18 +++++++++++++++++-
- 1 file changed, 17 insertions(+), 1 deletion(-)
-
-diff --git a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c
-index 4d35d83..a2bb9a9 100644
---- a/drivers/net/i40e/i40e_rxtx.c
-+++ b/drivers/net/i40e/i40e_rxtx.c
-@@ -94,7 +94,23 @@ i40e_rxd_to_vlan_tci(struct rte_mbuf *mb, volatile union i40e_rx_desc *rxdp)
- PMD_RX_LOG(DEBUG, "Descriptor l2tag1: %u",
- rte_le_to_cpu_16(rxdp->wb.qword0.lo_dword.l2tag1));
- } else {
-- mb->vlan_tci = 0;
-+ struct ether_hdr *eth_hdr = rte_pktmbuf_mtod(mb, struct ether_hdr *);
-+ u16 eth_type = eth_hdr->ether_type;
-+
-+ // The i40e firmware does not flag VLAN tagged packets if
-+ // VLAN stripping is disabled so we need to check the
-+ // ethernet header to find out if the received packet
-+ // is a VLAN packet
-+ if ((eth_type == rte_be_to_cpu_16(ETHER_TYPE_VLAN)) ||
-+ (eth_type == rte_be_to_cpu_16(ETHER_TYPE_VLAN_AD)) ||
-+ (eth_type == rte_be_to_cpu_16(ETHER_TYPE_VLAN_9100)) ||
-+ (eth_type == rte_be_to_cpu_16(ETHER_TYPE_VLAN_9200))) {
-+ struct vlan_hdr *vhdr = (struct vlan_hdr *)(eth_hdr+1);
-+ mb->ol_flags |= PKT_RX_VLAN_PKT;
-+ mb->vlan_tci = rte_be_to_cpu_16(vhdr->vlan_tci);
-+ } else {
-+ mb->vlan_tci = 0;
-+ }
- }
- #ifndef RTE_LIBRTE_I40E_16BYTE_RX_DESC
- if (rte_le_to_cpu_16(rxdp->wb.qword2.ext_status) &
---
-2.7.4
-
diff --git a/vnet/vnet/devices/dpdk/device.c b/vnet/vnet/devices/dpdk/device.c
index 7f759d6104d..bad149f03c6 100644
--- a/vnet/vnet/devices/dpdk/device.c
+++ b/vnet/vnet/devices/dpdk/device.c
@@ -1136,7 +1136,10 @@ dpdk_subif_add_del_function (vnet_main_t * vnm,
dpdk_device_t * xd = vec_elt_at_index (xm->devices, hw->dev_instance);
vnet_sw_interface_t * t = (vnet_sw_interface_t *) st;
int r, vlan_offload;
+ u32 prev_subifs = xd->vlan_subifs;
+ if (is_add) xd->vlan_subifs++;
+ else if (xd->vlan_subifs) xd->vlan_subifs--;
if (xd->dev_type != VNET_DPDK_DEV_ETH)
return 0;
@@ -1149,21 +1152,26 @@ dpdk_subif_add_del_function (vnet_main_t * vnm,
if (t->sub.eth.flags.no_tags == 1)
return 0;
- if ((t->sub.eth.flags.one_tag != 1) || (t->sub.eth.flags.exact_match != 1 ))
+ if ((t->sub.eth.flags.one_tag != 1) || (t->sub.eth.flags.exact_match != 1 )) {
+ xd->vlan_subifs = prev_subifs;
return clib_error_return (0, "unsupported VLAN setup");
-
+ }
vlan_offload = rte_eth_dev_get_vlan_offload(xd->device_index);
vlan_offload |= ETH_VLAN_FILTER_OFFLOAD;
- if ((r = rte_eth_dev_set_vlan_offload(xd->device_index, vlan_offload)))
+ if ((r = rte_eth_dev_set_vlan_offload(xd->device_index, vlan_offload))) {
+ xd->vlan_subifs = prev_subifs;
return clib_error_return (0, "rte_eth_dev_set_vlan_offload[%d]: err %d",
xd->device_index, r);
+ }
- if ((r = rte_eth_dev_vlan_filter(xd->device_index, t->sub.eth.outer_vlan_id, is_add)))
+ if ((r = rte_eth_dev_vlan_filter(xd->device_index, t->sub.eth.outer_vlan_id, is_add))) {
+ xd->vlan_subifs = prev_subifs;
return clib_error_return (0, "rte_eth_dev_vlan_filter[%d]: err %d",
xd->device_index, r);
+ }
return 0;
}
diff --git a/vnet/vnet/devices/dpdk/dpdk.h b/vnet/vnet/devices/dpdk/dpdk.h
index 4123cc9cbef..23c8eb3eaf5 100644
--- a/vnet/vnet/devices/dpdk/dpdk.h
+++ b/vnet/vnet/devices/dpdk/dpdk.h
@@ -210,6 +210,9 @@ typedef struct {
/* per-worker destination frame queue */
dpdk_frame_t * frames;
+ /* number of sub-interfaces */
+ u16 vlan_subifs;
+
dpdk_device_type_t dev_type:8;
dpdk_pmd_t pmd:8;
i8 cpu_socket;
diff --git a/vnet/vnet/devices/dpdk/node.c b/vnet/vnet/devices/dpdk/node.c
index 2c90d80a31e..d22838f1f06 100644
--- a/vnet/vnet/devices/dpdk/node.c
+++ b/vnet/vnet/devices/dpdk/node.c
@@ -305,9 +305,9 @@ dpdk_rx_next_and_error_from_mb_flags_x1 (dpdk_device_t *xd, struct rte_mbuf *mb,
else
{
*error0 = DPDK_ERROR_NONE;
- if (xd->per_interface_next_index != ~0)
+ if (PREDICT_FALSE(xd->per_interface_next_index != ~0))
n0 = xd->per_interface_next_index;
- else if (mb_flags & PKT_RX_VLAN_PKT)
+ else if (PREDICT_FALSE(xd->vlan_subifs || (mb_flags & PKT_RX_VLAN_PKT)))
n0 = DPDK_RX_NEXT_ETHERNET_INPUT;
else
{