Re: Encrypted Swap

[Nicholas Knight <tegeran@home.com>]

On Saturday 18 August 2001 02:52 am, Eric W. Biederman wrote:
> Dan Hollis <goemon@anime.net> writes:
> > On 17 Aug 2001, Eric W. Biederman wrote:
> > > Clearing memory on most machines takes a 1s or less.  Think of
> > > memory fill rates at the 800MB/s level.  Most BIOS's seem to clear
> > > some of the memory but I haven't read their code to see what they
> > > are doing.
> >
> > Ive measured rates far lower than that, at least for SDRAM.
>
> Hmm.  The numbers were off the top of my head and I've been messing
> with DDR SDRAM quite a bit so I may have doubled it.   Hmm.
>
> Nope.  I was remember something close to the typical streams numbers
> on an Athlon with DDR SDRAM.  Since those are read-modify-write
> numbers they should be close to the write numbers for normal SDRAM.
>
> With a PII/PIII and PC100 SDRAM I have measured about 640 MB/s writes.
>

I'm not sure where you're pulling these numbers from, but being a 
hardcore FPS gamer, I can tell you from experience, PC100 SDRAM does NOT 
hit 640MB/sec! Esspecialy not on a PII! PC100 SDRAM on my current 800Mhz 
non-tbird Athlon currently peaks near 250MB/sec