5b2655a693
This node classifies pkts based on packet type and sends them to appropriate next node. This is node helps in distribution of packets from ethdev_rx node to different next node with a constant overhead for all packet types. Currently all except non fragmented IPV4 packets are marked to be sent to "pkt_drop" node. Performance difference on ARM64 Octeontx2 is -4.9% due to addition of new node in the path. Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
239 lines
6.4 KiB
C
239 lines
6.4 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(C) 2020 Marvell International Ltd.
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*/
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#ifndef __INCLUDE_IP4_LOOKUP_NEON_H__
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#define __INCLUDE_IP4_LOOKUP_NEON_H__
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/* ARM64 NEON */
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static uint16_t
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ip4_lookup_node_process(struct rte_graph *graph, struct rte_node *node,
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void **objs, uint16_t nb_objs)
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{
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struct rte_mbuf *mbuf0, *mbuf1, *mbuf2, *mbuf3, **pkts;
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struct rte_ipv4_hdr *ipv4_hdr;
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void **to_next, **from;
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uint16_t last_spec = 0;
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rte_edge_t next_index;
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uint16_t n_left_from;
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struct rte_lpm *lpm;
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uint16_t held = 0;
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uint32_t drop_nh;
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rte_xmm_t result;
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rte_xmm_t priv01;
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rte_xmm_t priv23;
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int32x4_t dip;
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int rc, i;
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/* Speculative next */
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next_index = RTE_NODE_IP4_LOOKUP_NEXT_REWRITE;
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/* Drop node */
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drop_nh = ((uint32_t)RTE_NODE_IP4_LOOKUP_NEXT_PKT_DROP) << 16;
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/* Get socket specific LPM from ctx */
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lpm = *((struct rte_lpm **)node->ctx);
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pkts = (struct rte_mbuf **)objs;
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from = objs;
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n_left_from = nb_objs;
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for (i = OBJS_PER_CLINE; i < RTE_GRAPH_BURST_SIZE; i += OBJS_PER_CLINE)
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rte_prefetch0(&objs[i]);
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for (i = 0; i < 4 && i < n_left_from; i++)
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rte_prefetch0(rte_pktmbuf_mtod_offset(pkts[i], void *,
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sizeof(struct rte_ether_hdr)));
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dip = vdupq_n_s32(0);
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/* Get stream for the speculated next node */
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to_next = rte_node_next_stream_get(graph, node, next_index, nb_objs);
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while (n_left_from >= 4) {
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#if RTE_GRAPH_BURST_SIZE > 64
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/* Prefetch next-next mbufs */
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if (likely(n_left_from > 11)) {
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rte_prefetch0(pkts[8]);
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rte_prefetch0(pkts[9]);
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rte_prefetch0(pkts[10]);
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rte_prefetch0(pkts[11]);
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}
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#endif
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/* Prefetch next mbuf data */
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if (likely(n_left_from > 7)) {
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rte_prefetch0(rte_pktmbuf_mtod_offset(pkts[4], void *,
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sizeof(struct rte_ether_hdr)));
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rte_prefetch0(rte_pktmbuf_mtod_offset(pkts[5], void *,
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sizeof(struct rte_ether_hdr)));
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rte_prefetch0(rte_pktmbuf_mtod_offset(pkts[6], void *,
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sizeof(struct rte_ether_hdr)));
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rte_prefetch0(rte_pktmbuf_mtod_offset(pkts[7], void *,
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sizeof(struct rte_ether_hdr)));
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}
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mbuf0 = pkts[0];
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mbuf1 = pkts[1];
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mbuf2 = pkts[2];
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mbuf3 = pkts[3];
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pkts += 4;
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n_left_from -= 4;
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/* Extract DIP of mbuf0 */
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ipv4_hdr = rte_pktmbuf_mtod_offset(mbuf0, struct rte_ipv4_hdr *,
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sizeof(struct rte_ether_hdr));
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dip = vsetq_lane_s32(ipv4_hdr->dst_addr, dip, 0);
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/* Extract cksum, ttl as ipv4 hdr is in cache */
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priv01.u16[1] = ipv4_hdr->time_to_live;
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priv01.u32[1] = ipv4_hdr->hdr_checksum;
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/* Extract DIP of mbuf1 */
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ipv4_hdr = rte_pktmbuf_mtod_offset(mbuf1, struct rte_ipv4_hdr *,
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sizeof(struct rte_ether_hdr));
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dip = vsetq_lane_s32(ipv4_hdr->dst_addr, dip, 1);
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/* Extract cksum, ttl as ipv4 hdr is in cache */
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priv01.u16[5] = ipv4_hdr->time_to_live;
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priv01.u32[3] = ipv4_hdr->hdr_checksum;
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/* Extract DIP of mbuf2 */
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ipv4_hdr = rte_pktmbuf_mtod_offset(mbuf2, struct rte_ipv4_hdr *,
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sizeof(struct rte_ether_hdr));
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dip = vsetq_lane_s32(ipv4_hdr->dst_addr, dip, 2);
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/* Extract cksum, ttl as ipv4 hdr is in cache */
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priv23.u16[1] = ipv4_hdr->time_to_live;
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priv23.u32[1] = ipv4_hdr->hdr_checksum;
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/* Extract DIP of mbuf3 */
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ipv4_hdr = rte_pktmbuf_mtod_offset(mbuf3, struct rte_ipv4_hdr *,
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sizeof(struct rte_ether_hdr));
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dip = vsetq_lane_s32(ipv4_hdr->dst_addr, dip, 3);
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dip = vreinterpretq_s32_u8(
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vrev32q_u8(vreinterpretq_u8_s32(dip)));
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/* Extract cksum, ttl as ipv4 hdr is in cache */
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priv23.u16[5] = ipv4_hdr->time_to_live;
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priv23.u32[3] = ipv4_hdr->hdr_checksum;
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/* Perform LPM lookup to get NH and next node */
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rte_lpm_lookupx4(lpm, dip, result.u32, drop_nh);
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priv01.u16[0] = result.u16[0];
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priv01.u16[4] = result.u16[2];
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priv23.u16[0] = result.u16[4];
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priv23.u16[4] = result.u16[6];
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node_mbuf_priv1(mbuf0)->u = priv01.u64[0];
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node_mbuf_priv1(mbuf1)->u = priv01.u64[1];
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node_mbuf_priv1(mbuf2)->u = priv23.u64[0];
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node_mbuf_priv1(mbuf3)->u = priv23.u64[1];
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/* Enqueue four to next node */
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rte_edge_t fix_spec = ((next_index == result.u16[1]) &&
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(result.u16[1] == result.u16[3]) &&
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(result.u16[3] == result.u16[5]) &&
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(result.u16[5] == result.u16[7]));
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if (unlikely(fix_spec == 0)) {
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/* Copy things successfully speculated till now */
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rte_memcpy(to_next, from, last_spec * sizeof(from[0]));
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from += last_spec;
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to_next += last_spec;
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held += last_spec;
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last_spec = 0;
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/* Next0 */
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if (next_index == result.u16[1]) {
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to_next[0] = from[0];
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to_next++;
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held++;
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} else {
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rte_node_enqueue_x1(graph, node, result.u16[1],
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from[0]);
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}
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/* Next1 */
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if (next_index == result.u16[3]) {
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to_next[0] = from[1];
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to_next++;
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held++;
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} else {
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rte_node_enqueue_x1(graph, node, result.u16[3],
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from[1]);
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}
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/* Next2 */
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if (next_index == result.u16[5]) {
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to_next[0] = from[2];
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to_next++;
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held++;
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} else {
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rte_node_enqueue_x1(graph, node, result.u16[5],
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from[2]);
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}
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/* Next3 */
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if (next_index == result.u16[7]) {
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to_next[0] = from[3];
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to_next++;
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held++;
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} else {
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rte_node_enqueue_x1(graph, node, result.u16[7],
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from[3]);
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}
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from += 4;
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} else {
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last_spec += 4;
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}
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}
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while (n_left_from > 0) {
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uint32_t next_hop;
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uint16_t next0;
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mbuf0 = pkts[0];
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pkts += 1;
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n_left_from -= 1;
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/* Extract DIP of mbuf0 */
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ipv4_hdr = rte_pktmbuf_mtod_offset(mbuf0, struct rte_ipv4_hdr *,
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sizeof(struct rte_ether_hdr));
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/* Extract cksum, ttl as ipv4 hdr is in cache */
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node_mbuf_priv1(mbuf0)->cksum = ipv4_hdr->hdr_checksum;
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node_mbuf_priv1(mbuf0)->ttl = ipv4_hdr->time_to_live;
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rc = rte_lpm_lookup(lpm, rte_be_to_cpu_32(ipv4_hdr->dst_addr),
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&next_hop);
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next_hop = (rc == 0) ? next_hop : drop_nh;
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node_mbuf_priv1(mbuf0)->nh = (uint16_t)next_hop;
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next_hop = next_hop >> 16;
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next0 = (uint16_t)next_hop;
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if (unlikely(next_index ^ next0)) {
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/* Copy things successfully speculated till now */
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rte_memcpy(to_next, from, last_spec * sizeof(from[0]));
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from += last_spec;
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to_next += last_spec;
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held += last_spec;
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last_spec = 0;
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rte_node_enqueue_x1(graph, node, next0, from[0]);
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from += 1;
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} else {
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last_spec += 1;
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}
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}
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/* !!! Home run !!! */
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if (likely(last_spec == nb_objs)) {
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rte_node_next_stream_move(graph, node, next_index);
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return nb_objs;
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}
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held += last_spec;
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rte_memcpy(to_next, from, last_spec * sizeof(from[0]));
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rte_node_next_stream_put(graph, node, next_index, held);
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return nb_objs;
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}
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#endif /* __INCLUDE_IP4_LOOKUP_NEON_H__ */
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