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From: Nipun Gupta <nipun.gupta@nxp.com>
To: <jerin.jacob@caviumnetworks.com>
CC: <dev@dpdk.org>, <hemant.agrawal@nxp.com>, Nipun Gupta <nipun.gupta@nxp.com>
Date: Tue, 23 Jan 2018 19:47:53 +0530
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Subject: [dpdk-dev] [PATCH 3/3] net/dpaa2: prefetch the annotation in event
processing
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This patch adds software prefetching of the annotation which is
accessed by the driver to fetch the parsing results. The changes
also include as many instructions in between prefetching memory
and using it.
Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
---
drivers/net/dpaa2/dpaa2_rxtx.c | 24 ++++++++++++++++--------
1 file changed, 16 insertions(+), 8 deletions(-)
diff --git a/drivers/net/dpaa2/dpaa2_rxtx.c b/drivers/net/dpaa2/dpaa2_rxtx.c
index 3d45669..fee7e4c 100644
--- a/drivers/net/dpaa2/dpaa2_rxtx.c
+++ b/drivers/net/dpaa2/dpaa2_rxtx.c
@@ -676,7 +676,8 @@ void __attribute__((hot))
struct dpaa2_queue *rxq,
struct rte_event *ev)
{
- ev->mbuf = eth_fd_to_mbuf(fd);
+ rte_prefetch0((void *)(DPAA2_GET_FD_ADDR(fd) +
+ DPAA2_FD_PTA_SIZE + 16));
ev->flow_id = rxq->ev.flow_id;
ev->sub_event_type = rxq->ev.sub_event_type;
@@ -686,18 +687,22 @@ void __attribute__((hot))
ev->queue_id = rxq->ev.queue_id;
ev->priority = rxq->ev.priority;
+ ev->mbuf = eth_fd_to_mbuf(fd);
+
qbman_swp_dqrr_consume(swp, dq);
}
-void dpaa2_dev_process_atomic_event(struct qbman_swp *swp __attribute__((unused)),
- const struct qbman_fd *fd,
- const struct qbman_result *dq,
- struct dpaa2_queue *rxq,
- struct rte_event *ev)
+void __attribute__((hot))
+dpaa2_dev_process_atomic_event(struct qbman_swp *swp __attribute__((unused)),
+ const struct qbman_fd *fd,
+ const struct qbman_result *dq,
+ struct dpaa2_queue *rxq,
+ struct rte_event *ev)
{
- uint8_t dqrr_index = qbman_get_dqrr_idx(dq);
+ uint8_t dqrr_index;
- ev->mbuf = eth_fd_to_mbuf(fd);
+ rte_prefetch0((void *)(DPAA2_GET_FD_ADDR(fd) +
+ DPAA2_FD_PTA_SIZE + 16));
ev->flow_id = rxq->ev.flow_id;
ev->sub_event_type = rxq->ev.sub_event_type;
@@ -707,6 +712,9 @@ void dpaa2_dev_process_atomic_event(struct qbman_swp *swp __attribute__((unused)
ev->queue_id = rxq->ev.queue_id;
ev->priority = rxq->ev.priority;
+ ev->mbuf = eth_fd_to_mbuf(fd);
+
+ dqrr_index = qbman_get_dqrr_idx(dq);
ev->mbuf->seqn = dqrr_index + 1;
DPAA2_PER_LCORE_DQRR_SIZE++;
DPAA2_PER_LCORE_DQRR_HELD |= 1 << dqrr_index;
--
1.9.1