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Date: Sat, 27 Sep 2014 09:15:24 +0000 From: "fugang.duan@...escale.com" <fugang.duan@...escale.com> To: David Miller <davem@...emloft.net> CC: "Frank.Li@...escale.com" <Frank.Li@...escale.com>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "shawn.guo@...aro.org" <shawn.guo@...aro.org>, "bhutchings@...arflare.com" <bhutchings@...arflare.com> Subject: RE: [PATCH] net: fec: remove memory copy for rx path From: David Miller <davem@...emloft.net> Sent: Saturday, September 27, 2014 5:07 AM >To: Duan Fugang-B38611 >Cc: Li Frank-B20596; netdev@...r.kernel.org; shawn.guo@...aro.org; >bhutchings@...arflare.com >Subject: Re: [PATCH] net: fec: remove memory copy for rx path > >From: Fugang Duan <b38611@...escale.com> >Date: Wed, 24 Sep 2014 14:05:30 +0800 > >> Re-allocate skb instead of memory copy skb data in rx path to improve >> enet rx performance. >> >> Signed-off-by: Fugang Duan <B38611@...escale.com> >> Signed-off-by: Frank Li <Frank.Li@...escale.com> > >For small packet sizes, copying is almost certainly faster and it avoids >mismatched skb->truesize vs. skb->len which hurts TCP performance. > >We call this rx_copybreak, and there are many drivers you can look at to >see how this works. > >Thanks. Great suggestion. I will change it for next version. Thanks, Andy -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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