Re: how to turn off, or to clear read cache?

[Luciano Miguel Ferreira Rocha <luciano@lsd.di.uminho.pt>]

On Wed, Aug 20, 2003 at 03:31:32PM +0200, Måns Rullgård wrote:
> Sergey Spiridonov <spiridonov@gamic.com> writes:
> 
> >>> I need to make some performance tests. I need to switch off or to
> >>> clear read cache, so that consequent reading of the same file will
> >>> take the same amount of time.
> >>>
> >>>Is there an easy way to do it, without rebuilding the kernel?
> >> Unmount and remount the filesystem.
> >
> >
> > Would
> >
> > # mount -o remount
> >
> > do the job?
> 
> no

What about dd if=/dev/hda bs=8M count=$(awk '/MemTotal/ { printf "%d", $2/4096 }' /proc/meminfo) ?

Will it clear the cache?

Regards,
Luciano Rocha