netdev - Re: many sockets, slow sendto

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Message-ID: <45EDDCE2.9060609@fw.hu>
Date:	Tue, 06 Mar 2007 22:28:02 +0100
From:	Zacco <zacco@...hu>
To:	Andi Kleen <andi@...stfloor.org>, baruch@...en.org
CC:	netdev@...r.kernel.org
Subject: Re: many sockets, slow sendto

Hi,

Thx a lot you for the advice, I'll have a try.
And sorry for the stupid webmail, I will not use it again.

Zacco


Andi Kleen wrote:
> Zaccomer Lajos <zacco@...hu> writes:
>
>   
>> I'm playing around with a simulation, in which many thousands of IP
>>
>> addresses (on interface aliases) are used to send/receive TCP/UDP
>>     
>
> Something seems to be wrong with your emailer. It adds a empty
> line between each real line.
>
>   
>> packets. I noticed that the time of send/sendto increased linearly
>>
>> with the number of file descriptors, and I found it rather strange.
>>     
>
> Yes that is strange. I would suggest you use oprofile to identify which
> parts of the kernel use the CPU time with many descriptors.
>
> -Andi
>
>   

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