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Re: poor network loopback performance and scalability (was: Re: [RFC,PATCH] loopback: calls netif_receive_skb() instead of netif_rx())

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From: Herbert Xu
Subject: Re: poor network loopback performance and scalability (was: Re: [RFC,PATCH] loopback: calls netif_receive_skb() instead of netif_rx())
Date: Sunday, April 20, 2008 - 8:24 pm

Ingo Molnar <mingo@elte.hu> wrote:

Chiming in late here, but 1048576 can't possibly work with IP
which uses a 16-bit quantity as the length header.  In fact a
quick test seems to indicate that an 1048576 mtu doesn't generate
anything bigger than the default 16K mtu.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
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Messages in current thread:
Re: [RFC,PATCH] loopback: calls netif_receive_skb() instea ..., Ingo Molnar, (Mon Mar 31, 2:48 am)
Re: [RFC,PATCH] loopback: calls netif_receive_skb() instea ..., Eric Dumazet, (Mon Mar 31, 3:01 am)
Re: [RFC,PATCH] loopback: calls netif_receive_skb() instea ..., David Miller, (Mon Mar 31, 3:08 am)
Re: [RFC,PATCH] loopback: calls netif_receive_skb() instea ..., Ingo Molnar, (Mon Mar 31, 3:12 am)
Re: [RFC,PATCH] loopback: calls netif_receive_skb() instea ..., Ingo Molnar, (Mon Mar 31, 3:44 am)
Re: [RFC,PATCH] loopback: calls netif_receive_skb() instea ..., David Miller, (Mon Mar 31, 4:02 am)
poor network loopback performance and scalability (was: Re ..., Ingo Molnar, (Mon Mar 31, 4:36 am)
Re: [RFC,PATCH] loopback: calls netif_receive_skb() instea ..., Eric Dumazet, (Tue Apr 1, 2:19 am)
Re: [RFC,PATCH] loopback: calls netif_receive_skb() instea ..., Pavel Machek, (Thu Apr 3, 7:06 am)
Re: [RFC,PATCH] loopback: calls netif_receive_skb() instea ..., Eric Dumazet, (Thu Apr 3, 9:19 am)
Re: poor network loopback performance and scalability (was ..., Herbert Xu, (Sun Apr 20, 8:24 pm)
Re: poor network loopback performance and scalability, David Miller, (Sun Apr 20, 8:38 pm)
Re: poor network loopback performance and scalability, Ingo Molnar, (Mon Apr 21, 1:11 am)
Re: poor network loopback performance and scalability, David Miller, (Mon Apr 21, 1:16 am)
Re: poor network loopback performance and scalability, Herbert Xu, (Mon Apr 21, 3:19 am)
Re: poor network loopback performance and scalability, David Miller, (Mon Apr 21, 3:22 am)