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/*
// Copyright (c) 2010-2017 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
*/
#ifndef _PREFETCH_H_
#define _PREFETCH_H_
#include <rte_mbuf.h>
static inline void prefetch_nta(volatile void *p)
{
asm volatile ("prefetchnta %[p]" : [p] "+m" (*(volatile char *)p));
}
#ifdef PROX_PREFETCH_OFFSET
#define PREFETCH0(p) rte_prefetch0(p)
#define PREFETCH_OFFSET PROX_PREFETCH_OFFSET
#else
#define PREFETCH0(p) do {} while (0)
#define PREFETCH_OFFSET 0
#endif
static inline void prefetch_pkts(__attribute__((unused)) struct rte_mbuf **mbufs, __attribute__((unused)) uint16_t n_pkts)
{
#ifdef PROX_PREFETCH_OFFSET
for (uint16_t j = 0; j < PROX_PREFETCH_OFFSET && j < n_pkts; ++j) {
PREFETCH0(mbufs[j]);
}
for (uint16_t j = PROX_PREFETCH_OFFSET; j < n_pkts; ++j) {
PREFETCH0(mbufs[j]);
PREFETCH0(rte_pktmbuf_mtod(mbufs[j - PROX_PREFETCH_OFFSET], void*));
}
for (uint16_t j = n_pkts - PROX_PREFETCH_OFFSET; j < n_pkts; ++j) {
PREFETCH0(rte_pktmbuf_mtod(mbufs[j], void*));
}
#endif
}
static inline void prefetch_first(__attribute__((unused)) struct rte_mbuf **mbufs, __attribute__((unused)) uint16_t n_pkts)
{
#ifdef PROX_PREFETCH_OFFSET
for (uint16_t j = 0; j < PROX_PREFETCH_OFFSET && j < n_pkts; ++j) {
PREFETCH0(mbufs[j]);
}
for (uint16_t j = 1; j < PROX_PREFETCH_OFFSET && j < n_pkts; ++j) {
PREFETCH0(rte_pktmbuf_mtod(mbufs[j - 1], void *));
}
#endif
}
#endif /* _PREFETCH_H_ */
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