Re: [Announce] [patch] Modular Scheduler Core and Completely Fair Scheduler [CFS]

Willy Tarreau
2007-04-14T20:12:58Z

On Sat, Apr 14, 2007 at 12:48:55PM -0700, William Lee Irwin III wrote:
> On Sat, Apr 14, 2007 at 10:36:25AM +0200, Willy Tarreau wrote:
> > Forking becomes very slow above a load of 100 it seems. Sometimes,
> > the shell takes 2 or 3 seconds to return to prompt after I run
> > "scheddos &"
> > Those are very promising results, I nearly observe the same responsiveness
> > as I had on a solaris 10 with 10k running processes on a bigger machine.
> > I would be curious what a mysql test result would look like now.
>
> Where is scheddos?

I will send it to you off-list. I've been avoiding to publish it for a long
time because the stock scheduler was *very* sensible to trivial attacks
(freezes larger than 30s, impossible to log in). It's very basic, and I
have no problem sending it to anyone who requests it, it's just that as
long as some distros ship early 2.6 kernels I do not want it to appear on
mailing list archives for anyone to grab it and annoy their admins for free.

Cheers,
Willy