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-rw-r--r--VNFs/DPPD-PROX/prefetch.h63
1 files changed, 63 insertions, 0 deletions
diff --git a/VNFs/DPPD-PROX/prefetch.h b/VNFs/DPPD-PROX/prefetch.h
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--- /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_ */