From: Vladyslav Buslov <vladyslav.buslov@harmonicinc.com>
To: <helin.zhang@intel.com>, <jingjing.wu@intel.com>
Cc: <dev@dpdk.org>
Subject: [dpdk-dev] [PATCH] net/i40e: add additional prefetch instructions for bulk rx
Date: Thu, 14 Jul 2016 20:27:19 +0300 [thread overview]
Message-ID: <20160714172719.17502-2-vladyslav.buslov@harmonicinc.com> (raw)
In-Reply-To: <20160714172719.17502-1-vladyslav.buslov@harmonicinc.com>
Added prefetch of first packet payload cacheline in i40e_rx_scan_hw_ring
Added prefetch of second mbuf cacheline in i40e_rx_alloc_bufs
Signed-off-by: Vladyslav Buslov <vladyslav.buslov@harmonicinc.com>
---
drivers/net/i40e/i40e_rxtx.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c
index d3cfb98..e493fb4 100644
--- a/drivers/net/i40e/i40e_rxtx.c
+++ b/drivers/net/i40e/i40e_rxtx.c
@@ -1003,6 +1003,7 @@ i40e_rx_scan_hw_ring(struct i40e_rx_queue *rxq)
/* Translate descriptor info to mbuf parameters */
for (j = 0; j < nb_dd; j++) {
mb = rxep[j].mbuf;
+ rte_prefetch0(RTE_PTR_ADD(mb->buf_addr, RTE_PKTMBUF_HEADROOM));
qword1 = rte_le_to_cpu_64(\
rxdp[j].wb.qword1.status_error_len);
pkt_len = ((qword1 & I40E_RXD_QW1_LENGTH_PBUF_MASK) >>
@@ -1086,9 +1087,11 @@ i40e_rx_alloc_bufs(struct i40e_rx_queue *rxq)
rxdp = &rxq->rx_ring[alloc_idx];
for (i = 0; i < rxq->rx_free_thresh; i++) {
- if (likely(i < (rxq->rx_free_thresh - 1)))
+ if (likely(i < (rxq->rx_free_thresh - 1))) {
/* Prefetch next mbuf */
- rte_prefetch0(rxep[i + 1].mbuf);
+ rte_prefetch0(&rxep[i + 1].mbuf->cacheline0);
+ rte_prefetch0(&rxep[i + 1].mbuf->cacheline1);
+ }
mb = rxep[i].mbuf;
rte_mbuf_refcnt_set(mb, 1);
--
2.8.3
next prev parent reply other threads:[~2016-07-14 17:28 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-14 17:27 [dpdk-dev] [PATCH] Add missing prefetches to i40e bulk rx path Vladyslav Buslov
2016-07-14 17:27 ` Vladyslav Buslov [this message]
2016-09-14 13:24 ` [dpdk-dev] [PATCH] net/i40e: add additional prefetch instructions for bulk rx Ferruh Yigit
2016-10-10 13:25 ` Wu, Jingjing
2016-10-10 17:05 ` Vladyslav Buslov
2016-10-11 8:51 ` Ananyev, Konstantin
2016-10-11 9:24 ` Vladyslav Buslov
2016-10-12 0:04 ` Ananyev, Konstantin
2016-10-13 10:18 ` Bruce Richardson
2016-10-13 10:30 ` Ananyev, Konstantin
2016-11-15 12:19 ` Ferruh Yigit
2016-11-15 13:27 ` Vladyslav Buslov
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