| Message ID | 909631f38edfac07244ea62d94dc76953d52035e.1736910454.git.0x1207@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | net: stmmac: RX performance improvement | expand |
在 1/15/25 11:27, Furong Xu 写道: > 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> Thanks, Yanteng > --- > drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > 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),
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> Reviewed-by: Larysa Zaremba <larysa.zaremba@intel.com> > --- > drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > 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), > -- > 2.34.1 > >
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>
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),
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(-)