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

[Andrew Morton <akpm@osdl.org>]

Guillaume Thouvenin <guillaume.thouvenin@bull.net> 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?