Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2

Ingo Molnar
2007-03-13T08:18:23Z

* Mike Galbraith <efault@gmx.de> wrote:

> [...] The situation as we speak is that you can run cpu intensive
> tasks while watching eye-candy. With RSDL, you can't, you feel the
> non-interactive load instantly. [...]

i have to agree with Mike that this is a material regression that cannot
be talked around.

Con, we want RSDL to /improve/ interactivity. Having new scheduler
interactivity logic that behaves /worse/ in the presence of CPU hogs,
which CPU hogs are even reniced to +5, than the current interactivity
code, is i think a non-starter. Could you try to fix this, please? Good
interactivity in the presence of CPU hogs (be them default nice level or
nice +5) is _the_ most important scheduler interactivity metric.
Anything else is really secondary.

Ingo

ps. please be nice to each other - both of you are long-time
scheduler contributors who did lots of cool stuff :-)