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Re: [Lse-tech] Re: A common layer for Accounting packages

To: Guillaume Thouvenin <guillaume.thouvenin@xxxxxxxx>
Subject: Re: [Lse-tech] Re: A common layer for Accounting packages
From: Andrew Morton <akpm@xxxxxxxx>
Date: Wed, 2 Mar 2005 01:06:14 -0800
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Guillaume Thouvenin <guillaume.thouvenin@xxxxxxxx> wrote:
>
>   So I ran the lmbench with three different kernels with the fork
>  connector patch I just sent. Results are attached at the end of the mail
>  and there are three different lines which are:
> 
>       o First line is  a linux-2.6.11-rc4-mm1-cnfork
>       o Second line is a linux-2.6.11-rc4-mm1
>       o Third line is  a linux-2.6.11-rc4-mm1-cnfork with a user space
>            application. The user space application listened during 15h 
>            and received 6496 messages.
> 
>  Each test has been ran only once. 
> 
> ...
>  
> ------------------------------------------------------------------------------
>  Host                 OS  Mhz null null      open slct sig  sig  fork exec sh 
>  
>                               call  I/O stat clos TCP  inst hndl proc proc 
> proc
>  --------- ------------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 
> ----
>  account   Linux 2.6.11- 2765 0.17 0.26 3.57 4.19 16.9 0.51 2.31 162. 629. 
> 2415
>  account   Linux 2.6.11- 2765 0.16 0.26 3.56 4.17 17.6 0.50 2.30 163. 628. 
> 2417
>  account   Linux 2.6.11- 2765 0.16 0.27 3.67 4.25 17.6 0.51 2.28 176. 664. 
> 2456

This is the interesting bit, yes?  5-10% slowdown on fork is expected, but
why was exec slower?

What does "The user space application listened during 15h" mean?

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