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

Joe Damato
2025-01-15T17:35:30Z

On Wed, Jan 15, 2025 at 11:27:05AM +0800, Furong Xu wrote:
> 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(-)

Reviewed-by: Joe Damato <jdamato@fastly.com>