net/dpaa: tune prefetch in Rx path

As part of performance optimization excercise, tuning
the prefetch placement.

Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>

diff --git a/drivers/net/dpaa/dpaa_rxtx.c b/drivers/net/dpaa/dpaa_rxtx.c
index 2c57741..c4471c2 100644 (file)
--- a/drivers/net/dpaa/dpaa_rxtx.c
+++ b/drivers/net/dpaa/dpaa_rxtx.c
@@ -370,10 +370,6 @@ dpaa_eth_fd_to_mbuf(const struct qm_fd *fd, uint32_t ifid)
        if (unlikely(format == qm_fd_sg))
                return dpaa_eth_sg_to_mbuf(fd, ifid);
 
-       ptr = DPAA_MEMPOOL_PTOV(bp_info, qm_fd_addr(fd));
-
-       rte_prefetch0((void *)((uint8_t *)ptr + DEFAULT_RX_ICEOF));
-
        offset = (fd->opaque & DPAA_FD_OFFSET_MASK) >> DPAA_FD_OFFSET_SHIFT;
        length = fd->opaque & DPAA_FD_LENGTH_MASK;
 
@@ -381,8 +377,11 @@ dpaa_eth_fd_to_mbuf(const struct qm_fd *fd, uint32_t ifid)
 
        /* Ignoring case when format != qm_fd_contig */
        dpaa_display_frame(fd);
+       ptr = DPAA_MEMPOOL_PTOV(bp_info, qm_fd_addr(fd));
 
        mbuf = (struct rte_mbuf *)((char *)ptr - bp_info->meta_data_size);
+       /* Prefetch the Parse results and packet data to L1 */
+       rte_prefetch0((void *)((uint8_t *)ptr + DEFAULT_RX_ICEOF));
 
        mbuf->data_off = offset;
        mbuf->data_len = length;