netdev - Re: [PATCH 0/3] tun: fix aio

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Message-ID: <20090420120930.GA4941@gondor.apana.org.au>
Date:	Mon, 20 Apr 2009 20:09:30 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	davem@...emloft.net, netdev@...r.kernel.org, rusty@...tcorp.com.au
Subject: Re: [PATCH 0/3] tun: fix aio

Michael S. Tsirkin <mst@...hat.com> wrote:
>
> Note: I started out just allocating and copying the iovec rather than adding
> yet another skb-iterating routine, but this turned out to add small but
> measurable overhead on data path: tx time per packet jumped from 6500 to 6700 ns
> (let me know if you want to see that version of the patch).

Can you please post the copying version as well so we can compare?

Thanks,
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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