diff options
Diffstat (limited to 'VNFs/DPPD-PROX/prefetch.h')
| -rw-r--r-- | VNFs/DPPD-PROX/prefetch.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/VNFs/DPPD-PROX/prefetch.h b/VNFs/DPPD-PROX/prefetch.h new file mode 100644 index 00000000..a42afe4a --- /dev/null +++ b/VNFs/DPPD-PROX/prefetch.h @@ -0,0 +1,63 @@ +/* +// 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_ */ |