preload

[Marc Wiriadisastra]

On Wed, 2008-01-23 at 18:05 +0100, drago01 wrote:
> Marc Wiriadisastra wrote:
> > Those people running preload can we get some benchmarks to see whether
> > there is a benefit and if so how much of a benefit there is.
> >
> > I ask this because I got a post on the from Rahul asking whether there
> > was any significant benefit running preload. I personally don't have any
> > numbers so I'm going to try and start to benchmark the information.
> >   
> Well I tryed it and benchmarked it using bootchart and its even _worse_ 
> then readahead that we decided to disable.
> 
> No preload: 57 sec
> With preload: 1m 25sec
> 
> ie.  ~50% slowdown
> 

That is expected since it has to as mentioned elsewhere preload
everything so bootup is the logical place.

Cheers,

Marc