diff mbox series

[net-next,v3,4/4] net: stmmac: Convert prefetch() to net_prefetch() for received frames

Message ID 909631f38edfac07244ea62d94dc76953d52035e.1736910454.git.0x1207@gmail.com (mailing list archive)
State New
Headers show
Series net: stmmac: RX performance improvement | expand

Commit Message

Furong Xu Jan. 15, 2025, 3:27 a.m. UTC 
The size of DMA descriptors is 32 bytes at most.
net_prefetch() for received frames, and keep prefetch() for descriptors.

This patch brings ~4.8% driver performance improvement in a TCP RX
throughput test with iPerf tool on a single isolated Cortex-A65 CPU
core, 2.92 Gbits/sec increased to 3.06 Gbits/sec.

Suggested-by: Joe Damato <jdamato@fastly.com>
Signed-off-by: Furong Xu <0x1207@gmail.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index ad928e8e21a9..49b41148d594 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -5529,7 +5529,8 @@  static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue)
 
 			dma_sync_single_for_cpu(priv->device, buf->addr,
 						buf1_len, dma_dir);
-			prefetch(page_address(buf->page) + buf->page_offset);
+			net_prefetch(page_address(buf->page) +
+				     buf->page_offset);
 
 			xdp_init_buff(&ctx.xdp, buf_sz, &rx_q->xdp_rxq);
 			xdp_prepare_buff(&ctx.xdp, page_address(buf->page),