Re: [lng-odp] [PATCH] test: l2fwd: prefetch packet data

[Maxim Uvarov]

On 07/07/16 16:56, Matias Elo wrote:

Prefetch ethernet addresses. This is a no-op on odp-linux but improves
performance significantly on odp-dpdk implementation.

Signed-off-by: Matias Elo <matias....@nokia.com>
---
  test/performance/odp_l2fwd.c | 4 ++++
  1 file changed, 4 insertions(+)

diff --git a/test/performance/odp_l2fwd.c b/test/performance/odp_l2fwd.c
index 164f7f5..cd4789f 100644
--- a/test/performance/odp_l2fwd.c
+++ b/test/performance/odp_l2fwd.c
@@ -255,6 +255,10 @@ static inline void fill_eth_addrs(odp_packet_t pkt_tbl[],

for (i = 0; i < num; ++i) {

                pkt = pkt_tbl[i];
+
+               /* Prefetch ethernet addresses */
+               odp_packet_prefetch(pkt, 0, 12);
+

_ODP_ETHHDR_LEN ?

                if (odp_packet_has_eth(pkt)) {
                        eth = (odph_ethhdr_t *)odp_packet_l2_ptr(pkt, NULL);