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net: stmmac: Convert prefetch() to net_prefetch() for received frames

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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>
Reviewed-by: Yanteng Si <si.yanteng@linux.dev>
Reviewed-by: Larysa Zaremba <larysa.zaremba@intel.com>
Reviewed-by: Joe Damato <jdamato@fastly.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: maoxiaochuan <maoxiaochuan@loongson.cn>
This commit is contained in:
Furong Xu
2025-02-20 09:47:36 +08:00
committed by maoxiaochuan
parent 79d0dd9a45
commit 00959b6bb2
1 changed files with 2 additions and 1 deletions
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drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+2 -1
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@@ -5536,7 +5536,8 @@ read_again:
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),