From: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Date: Tue, 3 May 2016 14:07:45 +0000 (+0530)
Subject: app/testpmd: prefetch data in the forwarding loop
X-Git-Tag: spdx-start~6794
X-Git-Url: http://git.droids-corp.org/?p=dpdk.git;a=commitdiff_plain;h=7fdb263bbbda1d3df0e80f708ea472f6706d2eda

app/testpmd: prefetch data in the forwarding loop

prefetch the next packet data address in advance in forwarding loop
for performance improvement.

Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
---

diff --git a/app/test-pmd/csumonly.c b/app/test-pmd/csumonly.c
index 7e4f6620ad..1d6cda1508 100644
--- a/app/test-pmd/csumonly.c
+++ b/app/test-pmd/csumonly.c
@@ -676,6 +676,9 @@ pkt_burst_checksum_forward(struct fwd_stream *fs)
 	info.tso_segsz = txp->tso_segsz;
 
 	for (i = 0; i < nb_rx; i++) {
+		if (likely(i < nb_rx - 1))
+			rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
+						       void *));
 
 		ol_flags = 0;
 		info.is_tunnel = 0;
diff --git a/app/test-pmd/icmpecho.c b/app/test-pmd/icmpecho.c
index e510f9bf37..ed6e9249d7 100644
--- a/app/test-pmd/icmpecho.c
+++ b/app/test-pmd/icmpecho.c
@@ -346,6 +346,9 @@ reply_to_icmp_echo_rqsts(struct fwd_stream *fs)
 	fs->rx_packets += nb_rx;
 	nb_replies = 0;
 	for (i = 0; i < nb_rx; i++) {
+		if (likely(i < nb_rx - 1))
+			rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
+						       void *));
 		pkt = pkts_burst[i];
 		eth_h = rte_pktmbuf_mtod(pkt, struct ether_hdr *);
 		eth_type = RTE_BE_TO_CPU_16(eth_h->ether_type);
diff --git a/app/test-pmd/macfwd-retry.c b/app/test-pmd/macfwd-retry.c
index 3a96b3df54..d8cd069c77 100644
--- a/app/test-pmd/macfwd-retry.c
+++ b/app/test-pmd/macfwd-retry.c
@@ -117,6 +117,9 @@ pkt_burst_mac_retry_forward(struct fwd_stream *fs)
 #endif
 	fs->rx_packets += nb_rx;
 	for (i = 0; i < nb_rx; i++) {
+		if (likely(i < nb_rx - 1))
+			rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
+						       void *));
 		mb = pkts_burst[i];
 		eth_hdr = rte_pktmbuf_mtod(mb, struct ether_hdr *);
 		ether_addr_copy(&peer_eth_addrs[fs->peer_addr],
diff --git a/app/test-pmd/macfwd.c b/app/test-pmd/macfwd.c
index 3b7fffb79e..07a399afdb 100644
--- a/app/test-pmd/macfwd.c
+++ b/app/test-pmd/macfwd.c
@@ -113,6 +113,9 @@ pkt_burst_mac_forward(struct fwd_stream *fs)
 	if (txp->tx_ol_flags & TESTPMD_TX_OFFLOAD_INSERT_QINQ)
 		ol_flags |= PKT_TX_QINQ_PKT;
 	for (i = 0; i < nb_rx; i++) {
+		if (likely(i < nb_rx - 1))
+			rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
+						       void *));
 		mb = pkts_burst[i];
 		eth_hdr = rte_pktmbuf_mtod(mb, struct ether_hdr *);
 		ether_addr_copy(&peer_eth_addrs[fs->peer_addr],
diff --git a/app/test-pmd/macswap.c b/app/test-pmd/macswap.c
index 154889d146..c10f4b54b4 100644
--- a/app/test-pmd/macswap.c
+++ b/app/test-pmd/macswap.c
@@ -113,6 +113,9 @@ pkt_burst_mac_swap(struct fwd_stream *fs)
 	if (txp->tx_ol_flags & TESTPMD_TX_OFFLOAD_INSERT_QINQ)
 		ol_flags |= PKT_TX_QINQ_PKT;
 	for (i = 0; i < nb_rx; i++) {
+		if (likely(i < nb_rx - 1))
+			rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[i + 1],
+						       void *));
 		mb = pkts_burst[i];
 		eth_hdr = rte_pktmbuf_mtod(mb, struct ether_hdr *);