diff options
| author |   Furong Xu <0x1207@gmail.com> | 2025-01-15 11:27:05 +0800 |
|---|---|---|
| committer |   Paolo Abeni <pabeni@redhat.com> | 2025-01-16 12:14:23 +0100 |
| commit | 204182edb3107f87a40f34affb3de8851e1c5d68 (patch) | |
| tree | df4a0627bb37eba3caa1e709dd1103946117edc4 | |
| parent | net: stmmac: Optimize cache prefetch in RX path (diff) | |
| download | wireguard-linux-204182edb3107f87a40f34affb3de8851e1c5d68.tar.xz wireguard-linux-204182edb3107f87a40f34affb3de8851e1c5d68.zip | |
net: stmmac: Convert prefetch() to net_prefetch() for received frames
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>
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 3 |
1 files changed, 2 insertions, 1 deletions
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 @@ 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), |