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Re: [Xen-devel] n/w performance degradation


  • To: Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>
  • From: Diwaker Gupta <diwaker.lists@xxxxxxxxx>
  • Date: Mon, 5 Dec 2005 18:07:16 -0800
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Tue, 06 Dec 2005 02:07:38 +0000
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  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

> Ah, I expect I know what's going on here.
>
> Linux sizes the default socket buffer size based on how much 'system'
> memory it has.

Yes it does. But I've managed to saturate gigabit links from my VMs
with the _exact_ same configuration earlier, hence my original email.

> For a gigabit network you need at least 128KB.

These are extremely low latency networks, so the requirements might
actually be lower than this.

Diwaker
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