Re: compcache as a pre-swap area

Al Boldi
2009-08-15T11:00:31Z

Al Boldi wrote:
> Nitin Gupta wrote:
> > On 08/14/2009 09:32 AM, Al Boldi wrote:
> > > So once compcache fills up, it will start to age its contents into
> > > normal swap?
> >
> > This is desirable but not yet implemented. For now, if 'backing swap' is
> > used, compcache will forward incompressible pages to the backing swap
> > device. If compcache fills up, kernel will simply send further swap-outs
> > to swap device which comes next in priority.
>
> Ok, this sounds acceptable for now.
>
> The important thing now is to improve performance to a level comparable to
> a system with normal ssd-swap. Do you have such a comparisson?
>
> Another interresting benchmark would be to use compcache in a maximized
> configuration, ie. on a system w/ 1024KB Ram assign 960KB for compcache and
> leave 64KB for the system, and then see how it performs. This may easily
> pinpoint any bottlenecks compcache has, if any.

I am wondering, is it possible to run a system in 64KB?

Ok, make that MB instead.

Thanks!

--
Al