62b52877ad
Do four packets macswap in same loop iterate to squeeze more CPU cycles. Signed-off-by: Qi Zhang <qi.z.zhang@intel.com> Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com> Acked-by: Bernard Iremonger <bernard.iremonger@intel.com>
88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2018 Intel Corporation
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*/
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#ifndef _MACSWAP_SSE_H_
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#define _MACSWAP_SSE_H_
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#include "macswap_common.h"
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static inline void
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do_macswap(struct rte_mbuf *pkts[], uint16_t nb,
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struct rte_port *txp)
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{
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struct ether_hdr *eth_hdr[4];
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struct rte_mbuf *mb[4];
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uint64_t ol_flags;
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int i;
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int r;
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__m128i addr0, addr1, addr2, addr3;
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/**
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* shuffle mask be used to shuffle the 16 bytes.
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* byte 0-5 wills be swapped with byte 6-11.
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* byte 12-15 will keep unchanged.
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*/
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__m128i shfl_msk = _mm_set_epi8(15, 14, 13, 12,
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5, 4, 3, 2,
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1, 0, 11, 10,
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9, 8, 7, 6);
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ol_flags = ol_flags_init(txp->dev_conf.txmode.offloads);
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vlan_qinq_set(pkts, nb, ol_flags,
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txp->tx_vlan_id, txp->tx_vlan_id_outer);
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i = 0;
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r = nb;
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while (r >= 4) {
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mb[0] = pkts[i++];
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eth_hdr[0] = rte_pktmbuf_mtod(mb[0], struct ether_hdr *);
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addr0 = _mm_loadu_si128((__m128i *)eth_hdr[0]);
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mb[1] = pkts[i++];
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eth_hdr[1] = rte_pktmbuf_mtod(mb[1], struct ether_hdr *);
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addr1 = _mm_loadu_si128((__m128i *)eth_hdr[1]);
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mb[2] = pkts[i++];
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eth_hdr[2] = rte_pktmbuf_mtod(mb[2], struct ether_hdr *);
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addr2 = _mm_loadu_si128((__m128i *)eth_hdr[2]);
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mb[3] = pkts[i++];
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eth_hdr[3] = rte_pktmbuf_mtod(mb[3], struct ether_hdr *);
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addr3 = _mm_loadu_si128((__m128i *)eth_hdr[3]);
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addr0 = _mm_shuffle_epi8(addr0, shfl_msk);
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addr1 = _mm_shuffle_epi8(addr1, shfl_msk);
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addr2 = _mm_shuffle_epi8(addr2, shfl_msk);
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addr3 = _mm_shuffle_epi8(addr3, shfl_msk);
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_mm_storeu_si128((__m128i *)eth_hdr[0], addr0);
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_mm_storeu_si128((__m128i *)eth_hdr[1], addr1);
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_mm_storeu_si128((__m128i *)eth_hdr[2], addr2);
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_mm_storeu_si128((__m128i *)eth_hdr[3], addr3);
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mbuf_field_set(mb[0], ol_flags);
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mbuf_field_set(mb[1], ol_flags);
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mbuf_field_set(mb[2], ol_flags);
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mbuf_field_set(mb[3], ol_flags);
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r -= 4;
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}
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for ( ; i < nb; i++) {
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if (i < nb - 1)
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rte_prefetch0(rte_pktmbuf_mtod(pkts[i+1], void *));
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mb[0] = pkts[i];
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eth_hdr[0] = rte_pktmbuf_mtod(mb[0], struct ether_hdr *);
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/* Swap dest and src mac addresses. */
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addr0 = _mm_loadu_si128((__m128i *)eth_hdr);
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addr0 = _mm_shuffle_epi8(addr0, shfl_msk);
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_mm_storeu_si128((__m128i *)eth_hdr[0], addr0);
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mbuf_field_set(mb[0], ol_flags);
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}
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}
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#endif /* _MACSWAP_SSE_H_ */
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