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

Andrew Morton
2005-03-02T09:08:51Z

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?