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Date: Tue, 13 Nov 2012 06:13:31 -0800 From: Eric Dumazet <eric.dumazet@...il.com> To: Jeff Kirsher <jeffrey.t.kirsher@...el.com> Cc: davem@...emloft.net, Alexander Duyck <alexander.h.duyck@...el.com>, netdev@...r.kernel.org, gospo@...hat.com, sassmann@...hat.com Subject: Re: [net-next 01/11] ixgbe: Do not use DCA to prefetch the entire packet into the cache On Tue, 2012-11-13 at 06:03 -0800, Jeff Kirsher wrote: > From: Alexander Duyck <alexander.h.duyck@...el.com> > > The way the code was previously written it was causing DCA to prefetch the > entire packet into the cache when it was enabled. That is excessive as we > only really need the headers. > > We are now prefetching the headers via software so doing this from DCA would > be redundant anyway. So clear the bit that was causing us to prefetch the > packet data and instead only use DCA for the descriptor rings. > > Signed-off-by: Alexander Duyck <alexander.h.duyck@...el.com> > Tested-by: Phil Schmitt <phillip.j.schmitt@...el.com> > Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com> > --- Excellent ! My own ixgbe cards are moving so I cant test this, do you guys have some numbers to share ? Thanks -- 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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