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Date: Mon, 21 May 2007 17:56:02 +1000 From: Herbert Xu <herbert@...dor.apana.org.au> To: davem@...emloft.net (David Miller) Cc: xma@...ibm.com, rdreier@...co.com, ak@...e.de, krkumar2@...ibm.com, netdev@...r.kernel.org, netdev-owner@...r.kernel.org Subject: Re: [RFC] New driver API to speed up small packets xmits David Miller <davem@...emloft.net> wrote: > From: Shirley Ma <xma@...ibm.com> > Date: Tue, 15 May 2007 14:22:57 -0700 > >> I just wonder without TSO support in HW, how much benefit we >> can get by pushing GSO from interface layer to device layer besides >> we can do multiple packets in IPoIB. > > I bet the gain is non-trivial. Yep, for any NIC that supports SG but not TSO then software GSO will be a big win. When the NIC doesn't support SG then the win is mostly offset by the need to copy the packet again. Cheers, -- Visit Openswan at http://www.openswan.org/ Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt - 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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